Back-to-back powerful Pacific storm systems to impact the Pacific Northwest and northern California through the end of this week with heavy rain, flooding, strong winds, and higher elevation mountain snow. A strong, long-duration atmospheric river will accompany the Pacific storms, bringing excessive rainfall and flash flooding to southwest Oregon and northwest California through the week. Read More >
Overview
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A large-scale trough in southeastern Canada and the northeastern portions of the United States was in place on 29 June 2019. At the surface, a cold front was drifting southward in portions of New York and New England during the afternoon and evening hours. The environment to the south of the front and downstream of a midlevel vorticity maximum moving into the region became moderately unstable, and storms readily developed along ambient mesoscale boundaries. Steep low-level lapse rates allowed for the mixing of strong downdrafts to the surface, with storms quickly organizing into linear bands or clusters as cold pools developed and congealed. The most severe storms occurred in two corridors: eastern Pennsylvania into northern New Jersey (where a differential heating boundary allowed for localized stronger shear) and in far southeast Pennsylvania and northern Delmarva eastward through central New Jersey (where an instability gradient developed during the afternoon). Numerous reports of wind damage occurred in these corridors. Meanwhile, more cellular convection developed in central Delmarva and southern New Jersey in advance of the two aforementioned wind-damage corridors. In these areas, sporadic large hail occurred as well as a few microbursts. Interestingly, these predecessor storms appeared to rejuvenate the line of storms moving through the Delaware Valley, likely owing to convergence of outflow boundaries. Several additional reports of severe weather occurred in Burlington, Ocean, and Monmouth Counties as the line re-intensified as it approached the coast. |
 Composite radar loop of the widespread severe storms on 29 June 2019. |
Synoptic Overview at 12z 29 June 2019 (courtesy of SPC)
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| Figure 1: 250-mb analysis | Figure 2: 300-mb analysis | Figure 3: 500-mb analysis |
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| Figure 4: 700-mb analysis | Figure 5: 850-mb analysis | Figure 6: 925-mb analysis |
Synoptic Overview at 00z 30 June 2019 (courtesy of SPC)
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| Figure 7: 250-mb analysis | Figure 8: 300-mb analysis | Figure 9: 500-mb analysis |
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| Figure 10: 700-mb analysis | Figure 11: 850-mb analysis | Figure 12: 925-mb analysis |
Surface Maps (courtesy of WPC)
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| Figure 13: 15z surface map | Figure 14: 18z surface map | Figure 15: 21z surface map |
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| Figure 16: 00z surface map | Figure 17: 03z surface map | Figure 18: 06z surface map |
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| Figure 19: 12z Upton, NY sounding | Figure 20: 12z Sterling, VA sounding | Figure 21: 12z Wallops Island, VA sounding |
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| Figure 22: 00z Upton, NY sounding | Figure 23: 00z Sterling, VA sounding | Figure 24: 00z Wallops Island, VA sounding |
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| Figure 1: National Preliminary Reports 12z 29 June 2019 to 12z 30 June 2019 | Figure 2: 1630z SPC Convective Outlook | Figure 3: Zoomed Preliminary Reports for the same period. |
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| Figure 1: Plot of local storm reports and storm-based warnings for the 29 June 2019 event. Click here for more information. |
NWUS51 KPHI 010016
LSRPHI
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
816 PM EDT SUN JUN 30 2019
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0251 PM TSTM WND DMG 1 E CAYOTS 39.48N 75.83W
06/29/2019 CECIL MD PUBLIC
DOWNED TREES RESULTED IN PROPERTY DAMAGE ON
WOODSTOCK FARM LANE. TIME ESTIMATED FROM
RADAR.
0255 PM TSTM WND DMG 2 ENE CAYOTS 39.49N 75.81W
06/29/2019 CECIL MD PUBLIC
SEVERAL DOWNED TREES AND LIMBS ALONG STATE
HIGHWAY 310 SOUTH OF CHESAPEAKE CITY. TIME
ESTIMATED FROM RADAR.
0312 PM HAIL SICKLERVILLE 39.72N 74.97W
06/29/2019 E0.75 INCH CAMDEN NJ PUBLIC
0316 PM TSTM WND DMG 1 ENE BLANDON 40.44N 75.86W
06/29/2019 BERKS PA FIRE DEPT/RESCUE
DOWNED TREE ON HOCH ROAD. TIME ESTIMATED
FROM RADAR.
0317 PM HAIL 1 E SICKLERVILLE 39.72N 74.96W
06/29/2019 M1.00 INCH CAMDEN NJ PUBLIC
PHOTO SHOWING NICKEL TO QUARTER SIZE HAIL.
0320 PM HAIL WOOLWICH TWP 39.75N 75.30W
06/29/2019 M0.70 INCH GLOUCESTER NJ PUBLIC
0322 PM TSTM WND DMG 1 ENE MOHNTON 40.29N 75.97W
06/29/2019 BERKS PA FIRE DEPT/RESCUE
DOWNED TREE ON WIRES ON WELSH ROAD IN CUMRU
TWP. TIME ESTIMATED FROM RADAR.
0322 PM TSTM WND DMG KENHORST 40.31N 75.94W
06/29/2019 BERKS PA FIRE DEPT/RESCUE
DOWNED TREE ONTO A HOUSE ON COMMONWEALTH
BLVD IN KENHORST BORO. TIME ESTIMATED FROM
RADAR.
0324 PM TSTM WND DMG 2 NE WEST SADSBURY TWP 40.01N 75.91W
06/29/2019 CHESTER PA COUNTY OFFICIAL
DOWNED TREE BLOCKING THE ROADWAY AT THE
INTERSECTION OF SANDY HILL ROAD AND TYLER
DRIVE. TIME ESTIMATED FROM RADAR.
0326 PM TSTM WND DMG 2 W WEST CALN TWP 40.01N 75.89W
06/29/2019 CHESTER PA COUNTY OFFICIAL
DOWNED TREE BLOCKING THE ROADWAY AT THE
INTERSECTION OF KINGS HIGHWAY AND ASH ROAD.
TIME ESTIMATED FROM RADAR.
0326 PM TSTM WND DMG 1 SW WEST BRANDYWINE TW 40.03N 75.84W
06/29/2019 CHESTER PA COUNTY OFFICIAL
DOWNED TREE ON CEDAR KNOLL ROAD IN WEST CALN
TWP. TIME ESTIMATED FROM RADAR.
0329 PM TSTM WND DMG 2 NNW ROBESON TWP 40.26N 75.88W
06/29/2019 BERKS PA FIRE DEPT/RESCUE
DOWNED TREE AT THE INTERSECTION OF CHRISTY
COURT AND WHITE BEAR ROAD. TIME ESTIMATED
FROM RADAR.
0329 PM TSTM WND DMG 1 SSE PARKESBURG 39.95N 75.91W
06/29/2019 CHESTER PA COUNTY OFFICIAL
DOWNED TREE NEAR THE INTERSECTION OF
LIMESTONE ROAD AND OLD RACETRACK ROAD. TIME
ESTIMATED FROM RADAR..
0331 PM TSTM WND DMG 1 SSE ATGLEN 39.94N 75.97W
06/29/2019 CHESTER PA COUNTY OFFICIAL
DOWNED TREES AND POWER LINES ON AND NEAR
FALLOWFIELD ROAD. TIME ESTIMATED FROM RADAR.
0331 PM HAIL WAGONTOWN 40.01N 75.85W
06/29/2019 E1.00 INCH CHESTER PA PUBLIC
0332 PM TSTM WND DMG 1 SSE ALLENTOWN 40.59N 75.47W
06/29/2019 LEHIGH PA PUBLIC
NUMEROUS TREES AND POWERLINES DOWN IN THE
AREA SOUTH OF SUSQUEHANNA ST. A FEW ROADS
BLOCKED. TIME ESTIMATED FROM RADAR.
0333 PM HAIL COATESVILLE 39.98N 75.82W
06/29/2019 E1.00 INCH CHESTER PA PUBLIC
TIME ESTIMATED FROM RADAR.
0333 PM TSTM WND DMG 1 S WEST BRANDYWINE TWP 40.02N 75.82W
06/29/2019 CHESTER PA COUNTY OFFICIAL
DOWNED TREE BLOCKING MONACY ROAD NEAR MANOR
ROAD. TIME ESTIMATED FROM RADAR.
0335 PM TSTM WND DMG 1 NNW UPPER MILFORD TWP 40.50N 75.53W
06/29/2019 LEHIGH PA DEPT OF HIGHWAYS
DOWNED TREE IN WIRES AT THE INTERSECTION OF
CHESTNUT STREET AND KINGS HIGHWAY. LANE
CLOSURES IN PLACE. TIME ESTIMATED FROM
RADAR.
0337 PM TSTM WND DMG 1 SE ATGLEN 39.94N 75.96W
06/29/2019 CHESTER PA COUNTY OFFICIAL
DOWNED TREE ON GAP NEWPORT PIKE NEAR GLEN
RUN ROAD. TIME ESTIMATED FROM RADAR.
0339 PM TSTM WND DMG 1 W SALISBURY TWP 40.59N 75.44W
06/29/2019 LEHIGH PA PUBLIC
SOCIAL MEDIA VIDEO FOOTAGE OF NUMEROUS TREES
DOWN AND PROPERTY DAMAGE IN THE POTTER
STREET AND TIOGA STREET SECTIONS OF
ALLENTOWN. TIME ESTIMATED FROM RADAR.
0339 PM TSTM WND DMG 2 SSW HANOVER TWP 40.65N 75.40W
06/29/2019 NORTHAMPTON PA NEWSPAPER
DOWNED TREE ON JACKSONVILLE ROAD NEAR MACADA
ROAD. TIME ESTIMATED FROM RADAR.
0340 PM HAIL 1 NNE SOUTH HARRISON TW 39.72N 75.25W
06/29/2019 M1.00 INCH GLOUCESTER NJ PUBLIC
0340 PM TSTM WND DMG 1 NE SOUTH HARRISON TWP 39.72N 75.25W
06/29/2019 GLOUCESTER NJ TRAINED SPOTTER
TWO TREES BLOWN DOWN.
0341 PM TSTM WND DMG 2 S PARKESBURG 39.94N 75.92W
06/29/2019 CHESTER PA COUNTY OFFICIAL
DOWNED TREE BLOCKING LIMESTONE ROAD NEAR
HIGHLAND ROAD. TIME ESTIMATED FROM RADAR.
0342 PM TSTM WND DMG 2 NW BYRAM TWP 40.96N 74.74W
06/29/2019 SUSSEX NJ PUBLIC
NUMEROUS TREES REPORTED DOWN IN THE AREA.
TIME ESTIMATED FROM RADAR.
0345 PM TSTM WND DMG 1 S BETHLEHEM TWP 40.64N 75.33W
06/29/2019 NORTHAMPTON PA NEWSPAPER
SEVERAL REPORTS OF DOWNED TREES AND WIRES ON
FREEMANSBURG AVENUE. TIME ESTIMATED FROM
RADAR.
0347 PM TSTM WND DMG EAST FALLOWFIELD TWP 39.95N 75.82W
06/29/2019 CHESTER PA COUNTY OFFICIAL
DOWNED TREE NEAR THE INTERSECTION OF
STRASBURG ROAD AND YOUNGSBURG ROAD. TIME
ESTIMATED FROM RADAR.
0351 PM TSTM WND DMG COATESVILLE 39.98N 75.83W
06/29/2019 CHESTER PA PUBLIC
CORRECTS PREVIOUS TSTM WND DMG REPORT FROM
COATESVILLE. PHOTO OF A LARGE TREE DOWN.
TIME ESTIMATED FROM RADAR.
0351 PM TSTM WND DMG 2 WNW CONOWINGO 39.68N 76.19W
06/29/2019 CECIL MD PUBLIC
THUNDERSTORM OUTFLOW RESULTED IN A DOWNED
TREE AND WIRES ON CONOWINGO ROAD. TIME
ESTIMATED FROM RADAR.
0351 PM TSTM WND DMG 1 NNW EAST CALN TWP 40.04N 75.69W
06/29/2019 CHESTER PA COUNTY OFFICIAL
DOWNED TREE NEAR THE INTERSECTION OF WILLIAM
SALESBURY DRIVE AND HICKORY DRIVE. TIME
ESTIMATED FROM RADAR.
0352 PM TSTM WND DMG 1 SSW ALLENTOWN 40.59N 75.48W
06/29/2019 LEHIGH PA PUBLIC
PHOTO SHOWS A LARGE TREE DOWN ON A FENCE AND
POWER LINES. TIME ESTIMATED FROM RADAR.
0352 PM HAIL 2 N COATESVILLE 40.01N 75.82W
06/29/2019 E0.25 INCH CHESTER PA PUBLIC
0354 PM TSTM WND DMG 3 NNW EAST CALN TWP 40.06N 75.71W
06/29/2019 CHESTER PA COUNTY OFFICIAL
DOWNED TREE BLOCKING DORIAN MILL ROAD NEAR
ROBERT DEAN DRIVE. TIME ESTIMATED FROM
RADAR.
0358 PM TSTM WND DMG 2 ESE EAST COVENTRY TWP 40.19N 75.59W
06/29/2019 CHESTER PA DEPT OF HIGHWAYS
DOWNED TREE IN WIRES AT THE INTERSECTION OF
BETHEL CHURCH ROAD AND KOLB ROAD. LANE
CLOSURES REQUIRED. TIME ESTIMATED FROM
RADAR.
0358 PM TSTM WND DMG 1 SSW SPRING CITY 40.17N 75.56W
06/29/2019 CHESTER PA COUNTY OFFICIAL
DOWNED TREE ON STONY RUN ROAD NEAR
SCHUYLKILL ROAD IN EAST VINCENT TWP. TIME
ESTIMATED FROM RADAR.
0358 PM TSTM WND DMG 1 NNW EAST CALN TWP 40.04N 75.69W
06/29/2019 CHESTER PA COUNTY OFFICIAL
DOWNED TREE NEAR THE INTERSECTION OF
WOODLAND DRIVE AND SANTILLO WAY. TIME
ESTIMATED FROM RADAR.
0400 PM TSTM WND DMG PHILLIPSBURG 40.69N 75.20W
06/29/2019 WARREN NJ COUNTY OFFICIAL
DOWNED TREE NEAR THE INTERSECTION OF HUDSON
STREET AND WASHINGTON STREET. TIME ESTIMATED
FROM RADAR.
0402 PM TSTM WND DMG 2 SE EXTON 40.01N 75.61W
06/29/2019 CHESTER PA COUNTY OFFICIAL
DOWNED TREE BLOCKING BOOT ROAD NEAR KING
ROAD IN WEST WHITELAND TWP. TIME ESTIMATED
FROM RADAR.
0402 PM TSTM WND DMG 2 N OAKS 40.16N 75.46W
06/29/2019 MONTGOMERY PA COUNTY OFFICIAL
DOWNED TREE NEAR STELLAS WAY AND LEVEL ROAD.
TIME ESTIMATED FROM RADAR.
0402 PM HAIL FAIRFAX 39.79N 75.54W
06/29/2019 E0.75 INCH NEW CASTLE DE PUBLIC
TIME ESTIMATED FROM RADAR.
0402 PM TSTM WND DMG 1 NW PLEASANT HILL 39.68N 75.92W
06/29/2019 CECIL MD PUBLIC
SOCIAL MEDIA PHOTO OF LARGE TREE BLOWN DOWN
ACROSS BLUE BALL ROAD NEAR WHEATLEY ROAD.
MORE TREES REPORTED DOWN IN THE AREA. TIME
ESTIMATED FROM RADAR.
0403 PM TSTM WND DMG 1 W HELLERTOWN 40.58N 75.37W
06/29/2019 NORTHAMPTON PA PUBLIC
LARGE TREE LIMBS DOWNED. TIME ESTIMATED FROM
RADAR.
0405 PM TSTM WND DMG LANDENBERG 39.78N 75.77W
06/29/2019 CHESTER PA PUBLIC
TREES DOWN. TIME ESTIMATED FROM RADAR.
0406 PM TSTM WND DMG 1 W GRADYVILLE 39.94N 75.48W
06/29/2019 DELAWARE PA DEPT OF HIGHWAYS
DOWNED TREE ON STATE HIGHWAY 352 NEAR VALLEY
ROAD. ALL LANES CLOSED. TIME ESTIMATED FROM
RADAR.
0406 PM TSTM WND DMG 2 E PHILLIPSBURG 40.70N 75.17W
06/29/2019 WARREN NJ COUNTY OFFICIAL
DOWNED TREE ON U.S. HIGHWAY 22 NEAR MEMORIAL
PARKWAY. TIME ESTIMATED FROM RADAR.
0406 PM TSTM WND DMG WEST CHESTER 39.96N 75.60W
06/29/2019 CHESTER PA PUBLIC
REPORTS OF DOWNED TREES AND LIMBS IN SEVERAL
LOCATIONS IN AND NEAR WEST CHESTER. TIME
ESTIMATED FROM SOCIAL MEDIA REPORTS AND
RADAR.
0408 PM TSTM WND DMG 1 WSW GRADYVILLE 39.94N 75.48W
06/29/2019 DELAWARE PA DEPT OF HIGHWAYS
CORRECTS PREVIOUS TSTM WND DMG REPORT FROM 1
WSW GRADYVILLE. DOWNED TREE ON GRADYVILLE
ROAD NEAR VALLEY ROAD. ALL LANES CLOSED.
TIME ESTIMATED FROM RADAR.
0408 PM TSTM WND DMG 2 NNW PAOLI 40.06N 75.49W
06/29/2019 CHESTER PA COUNTY OFFICIAL
DOWNED TREE NEAR THE INTERSECTION OF VALLEY
ROAD AND SWEDESFORD ROAD. TIME ESTIMATED
FROM RADAR.
0408 PM TSTM WND DMG 1 SSW KENNETT SQUARE 39.83N 75.72W
06/29/2019 CHESTER PA COUNTY OFFICIAL
DOWNED TREE NEAR THE INTERSECTION OF ORIOLE
DRIVE AND CHANDLER MILL ROAD. TIME ESTIMATED
FROM RADAR.
0412 PM TSTM WND DMG 1 ENE BERWYN 40.05N 75.41W
06/29/2019 CHESTER PA COUNTY OFFICIAL
DOWNED TREE NEAR THE INTERSECTION OF UPPER
GULPH ROAD AND WENTWORTH ROAD. TIME
ESTIMATED FROM RADAR.
0413 PM TSTM WND DMG BEAR 39.63N 75.66W
06/29/2019 NEW CASTLE DE PUBLIC
LARGE TREE LIMBS DOWN IN BEAR. TIME
ESTIMATED FROM RADAR.
0414 PM TSTM WND DMG 1 NW BROOKHAVEN 39.89N 75.40W
06/29/2019 DELAWARE PA PUBLIC
DOWNED TREE ON STATE HIGHWAY 352 NEAR
MIDDLETOWN ROAD. ALL LANES CLOSED. TIME
ESTIMATED FROM RADAR.
0414 PM TSTM WND DMG 2 W WEST CONSHOHOCKEN 40.07N 75.34W
06/29/2019 MONTGOMERY PA COUNTY OFFICIAL
DOWNED TREE BLOCKING INTERSTATE 76 EXIT RAMP
TO BALLIGOMINGO ROAD. TIME ESTIMATED FROM
RADAR.
0414 PM TSTM WND DMG 2 E BERWYN 40.05N 75.40W
06/29/2019 CHESTER PA COUNTY OFFICIAL
DOWNED TREE NEAR THE INTERSECTION OF OLD
EAGLE SCHOOL ROAD AND VALLEY ROAD. TIME
ESTIMATED FROM RADAR.
0415 PM TSTM WND DMG NEWARK 39.68N 75.76W
06/29/2019 NEW CASTLE DE TRAINED SPOTTER
TREE DAMAGE AND WINDS ESTIMATED TO BE 60-65
MPH. TIME ESTIMATED FROM RADAR.
0415 PM HAIL GALLOWAY TWP 39.47N 74.51W
06/29/2019 E0.25 INCH ATLANTIC NJ TRAINED SPOTTER
0416 PM TSTM WND DMG 1 E CONSHOHOCKEN 40.08N 75.28W
06/29/2019 MONTGOMERY PA COUNTY OFFICIAL
DOWNED TREE AT BARREN HILL ROAD AND RIVER
ROAD. TIME ESTIMATED FROM RADAR.
0416 PM TSTM WND DMG 1 NNW GLADWYNE 40.05N 75.29W
06/29/2019 MONTGOMERY PA COUNTY OFFICIAL
LARGE TREES DOWN NEAR STONY LANE. TIME
ESTIMATED FROM RADAR.
0416 PM HAIL 1 WNW SMITHVILLE 39.50N 74.48W
06/29/2019 E0.88 INCH ATLANTIC NJ PUBLIC
0418 PM TSTM WND DMG 1 ENE LAWRENCE PARK 39.98N 75.32W
06/29/2019 DELAWARE PA PUBLIC
LARGE LIMBS DOWNED FROM THE CANOPIES OF
SEVERAL OAK AND MAPLE TREES. TIME ESTIMATED
FROM RADAR.
0418 PM TSTM WND DMG 1 WSW GLADWYNE 40.03N 75.29W
06/29/2019 MONTGOMERY PA COUNTY OFFICIAL
DOWNED TREE AND WIRES NEAR THE INTERSECTION
OF DOVE LAKE ROAD AND BLACK ROCK ROAD. TIME
ESTIMATED FROM RADAR.
0419 PM TSTM WND GST 3 NNE PENNSVILLE 39.69N 75.51W
06/29/2019 M58 MPH SALEM NJ MESONET
PRIVATE WEATHER STATION.
0420 PM TSTM WND DMG BYRAM TWP 40.94N 74.71W
06/29/2019 SUSSEX NJ COUNTY OFFICIAL
TELEPHONE POLES AND WIRES DOWN.
0422 PM TSTM WND DMG FRENCHTOWN 40.53N 75.06W
06/29/2019 HUNTERDON NJ PUBLIC
PHOTO OF A LARGE TREE DOWN. TIME ESTIMATED
FROM RADAR.
0422 PM TSTM WND DMG 1 E ORELAND 40.11N 75.17W
06/29/2019 MONTGOMERY PA COUNTY OFFICIAL
DOWNED TREE ON TENNIS AVENUE NEAR LIMEKILN
PIKE. TIME ESTIMATED FROM RADAR.
0422 PM TSTM WND DMG 1 SSE ARDMORE 40.00N 75.29W
06/29/2019 MONTGOMERY PA COUNTY OFFICIAL
ROAD SIGN BLOWN OVER NEAR THE INTERSECTION
OF ARGYLE ROAD AND WYNNEWOOD ROAD. TIME
ESTIMATED FROM RADAR.
0424 PM HAIL 1 N MAGNOLIA 39.09N 75.47W
06/29/2019 E1.00 INCH KENT DE PUBLIC
A TIN ROOF WAS DENTED FROM THE HAIL. TIME
ESTIMATED FROM RADAR.
0424 PM TSTM WND DMG CHELTENHAM 40.06N 75.11W
06/29/2019 MONTGOMERY PA COUNTY OFFICIAL
DOWNED TREE ON OAK LANE ROAD NEAR COVENTRY
ROAD. TIME ESTIMATED FROM RADAR.
0426 PM TSTM WND DMG CHELTENHAM 40.05N 75.10W
06/29/2019 MONTGOMERY PA COUNTY OFFICIAL
DOWNED TREE ON ASHMEAD ROAD NEAR TOOKANY
CREEK PARKWAY. TIME ESTIMATED FROM RADAR.
0426 PM TSTM WND DMG 1 NNW GERMANTOWN 40.05N 75.20W
06/29/2019 PHILADELPHIA PA PUBLIC
SEVERAL TREES DOWN IN THIS AREA. TIME
ESTIMATED FROM RADAR.
0428 PM TSTM WND DMG 1 ENE CAYOTS 39.49N 75.83W
06/29/2019 CECIL MD PUBLIC
SEVERAL TREES DOWN ALONG CAYOTS CORNER ROAD
BETWEEN MD 213 AND ST AUGUSTINE ROAD. TIME
ESTIMATED FROM RADAR.
0428 PM TSTM WND DMG 2 SW SCHOOLEYS MOUNTAIN 40.78N 74.85W
06/29/2019 MORRIS NJ COUNTY OFFICIAL
DOWNED TREE NEAR THE INTERSECTION OF
PLEASANT GROVE ROAD AND STEPHENBURG ROAD.
TIME ESTIMATED FROM RADAR.
0428 PM TSTM WND DMG 1 SSE LOWER MORELAND TW 40.11N 75.06W
06/29/2019 MONTGOMERY PA COUNTY OFFICIAL
LARGE TREE BLOWN DOWN BLOCKING STAHL ROAD
NEAR WELSH ROAD. TIME ESTIMATED FROM RADAR.
0429 PM TSTM WND GST 1 SW BARNEGAT LIGHT 39.75N 74.12W
06/29/2019 M70 MPH OCEAN NJ MESONET
PRIVATE WEATHER STATION.
0430 PM TSTM WND DMG 1 NNW CHESAPEAKE CITY 39.54N 75.82W
06/29/2019 CECIL MD PUBLIC
TREES DOWN IN THE AREA. TIME ESTIMATED FROM
RADAR.
0430 PM TSTM WND DMG 1 W STANHOPE 40.91N 74.72W
06/29/2019 SUSSEX NJ DEPT OF HIGHWAYS
DOWNED TREE ON U.S. HIGHWAY 206 NORTH OF
INTERSTATE 80. ALL LANES CLOSED. TIME
ESTIMATED FROM RADAR.
0430 PM TSTM WND DMG 1 SW ROCKLEDGE 40.08N 75.10W
06/29/2019 MONTGOMERY PA COUNTY OFFICIAL
DOWNED TREE NEAR THE INTERSECTION OF
CHANCELLOR AVENUE AND NORTHWOOD AVENUE. TIME
ESTIMATED FROM RADAR.
0430 PM TSTM WND DMG TACONY 40.03N 75.05W
06/29/2019 PHILADELPHIA PA PUBLIC
REPORTS OF DOWNED TREES IN THE AREA. TIME
ESTIMATED FROM RADAR.
0432 PM HAIL MOUNT HOLLY 39.99N 74.79W
06/29/2019 E0.70 INCH BURLINGTON NJ PUBLIC
DIME SIZE HAIL REPORTED IN DOWNTOWN MOUNT
HOLLY. TIME ESTIMATED FROM RADAR.
0432 PM TSTM WND DMG 1 ENE PILESGROVE TWP 39.67N 75.37W
06/29/2019 SALEM NJ PUBLIC
MPING REPORT OF TREE LIMBS DOWN AND PROPERTY
DAMAGE FROM THUNDERSTORM WINDS AT THIS
LOCATION. TIME ESTIMATED FROM RADAR.
0432 PM TSTM WND DMG NORTHEAST PHILADELPHIA 40.09N 75.02W
06/29/2019 PHILADELPHIA PA PUBLIC
SOCIAL MEDIA PHOTOS OF SEVERAL TREES DOWN IN
THE NORTHEAST PHILADELPHIA AREA. TIME
ESTIMATED FROM RADAR.
0433 PM MARINE TSTM WIND 2 E WARETOWN 39.79N 74.17W
06/29/2019 M46 MPH ANZ451 NJ MESONET
WEATHERFLOW GAUGE.
0434 PM TSTM WND DMG MOUNT HOLLY 39.99N 74.79W
06/29/2019 BURLINGTON NJ NWS EMPLOYEE
TREES AND LARGE TREE LIMBS DOWN. TIME
ESTIMATED FROM RADAR.
0434 PM HAIL MOUNT HOLLY 39.99N 74.79W
06/29/2019 E0.75 INCH BURLINGTON NJ PUBLIC
TIME ESTIMATED FROM RADAR.
0434 PM TSTM WND DMG SUCCASUNNA 40.87N 74.65W
06/29/2019 MORRIS NJ DEPT OF HIGHWAYS
DOWNED TREE ON STATE HIGHWAY 10 EASTBOUND
NEAR MAIN STREET. ALL LANES CLOSED. TIME
ESTIMATED FROM RADAR.
0436 PM TSTM WND DMG 2 WNW RANDOLPH, NJ 40.86N 74.60W
06/29/2019 MORRIS NJ DEPT OF HIGHWAYS
DOWNED TREE ON STATE HIGHWAY 10 WESTBOUND
NEAR ARROWGATE DRIVE. ALL LANES CLOSED. TIME
ESTIMATED FROM RADAR.
0436 PM TSTM WND DMG 1 S LANDING 40.89N 74.66W
06/29/2019 MORRIS NJ DEPT OF HIGHWAYS
DOWNED TREE ON U.S. HIGHWAY 46 EASTBOUND
NEAR MAIN STREET. ALL LANES CLOSED. TIME
ESTIMATED FROM RADAR.
0440 PM TSTM WND DMG 1 WSW MIDDLETOWN 39.45N 75.73W
06/29/2019 NEW CASTLE DE PUBLIC
SEVERAL REPORTS OF TREE DAMAGE IN THE
MIDDLETOWN AREA. TIME ESTIMATED FROM RADAR.
0440 PM TSTM WND DMG 2 WSW MORRISVILLE 40.20N 74.81W
06/29/2019 BUCKS PA TRAINED SPOTTER
DOWNED TREE SEVERELY DAMAGED AN APARTMENT
BUILDING. TIME ESTIMATED FROM RADAR.
0441 PM MARINE TSTM WIND 1 E BARNEGAT LIGHT 39.76N 74.09W
06/29/2019 M55 MPH ANZ451 NJ MESONET
WEATHERFLOW GAUGE.
0441 PM HAIL CHERRY HILL 39.93N 75.03W
06/29/2019 M0.25 INCH CAMDEN NJ TRAINED SPOTTER
LASTED FOR 10 MINUTES.
0442 PM TSTM WND DMG ODESSA 39.46N 75.66W
06/29/2019 NEW CASTLE DE PUBLIC
MPING REPORT OF TREE LIMBS DOWN AND PROPERTY
DAMAGE FROM THUNDERSTORM WINDS AT THIS
LOCATION. TIME ESTIMATED FROM RADAR.
0442 PM TSTM WND DMG 1 NW LANGHORNE 40.18N 74.93W
06/29/2019 BUCKS PA TRAINED SPOTTER
SEVERAL TREES AND POWER LINES DOWN. WINDS
BLEW DOWN A PARTY TENT. TIME ESTIMATED FROM
RADAR.
0443 PM TSTM WND DMG 1 SSE BENSALEM 40.10N 74.92W
06/29/2019 BUCKS PA PUBLIC
MPING REPORT OF TREE LIMBS DOWN AND PROPERTY
DAMAGE FROM THUNDERSTORM WINDS. TIME
ESTIMATED FROM RADAR.
0443 PM TSTM WND DMG TACONY 40.03N 75.05W
06/29/2019 PHILADELPHIA PA PUBLIC
TREE DOWN ON A TRUCK AND APARTMENT. TIME
ESTIMATED FROM RADAR.
0445 PM HAIL RANDOLPH, NJ 40.85N 74.57W
06/29/2019 M0.25 INCH MORRIS NJ TRAINED SPOTTER
0445 PM TSTM WND DMG 1 SSW PHILADELPHIA 39.94N 75.16W
06/29/2019 PHILADELPHIA PA TRAINED SPOTTER
TREES AND POWER LINES DOWN BETWEEN
WASHINGTON AND CHRISTIAN STREETS. TIME
ESTIMATED FROM RADAR.
0445 PM TSTM WND DMG 1 S CHESTERTOWN 39.19N 76.06W
06/29/2019 QUEEN ANNE'S MD PUBLIC
MULTIPLE TREES DOWN, ROOF SHINGLES AND
SIDING TORN OFF HOUSES, DAMAGE TO RIVER
DOCKS NEAR 322 RIVER ROAD.
0446 PM TSTM WND DMG SHILOH 39.46N 75.30W
06/29/2019 CUMBERLAND NJ BROADCAST MEDIA
DOWNED TREE AT A RESIDENCE. TIME ESTIMATED
FROM RADAR.
0447 PM TSTM WND DMG HOPEWELL 40.39N 74.76W
06/29/2019 MERCER NJ PUBLIC
PHOTO OF A LARGE TREE DOWN OVER A ROADWAY
AND LIMB DOWN ON A CAR. TIME ESTIMATED FROM
RADAR.
0448 PM TSTM WND DMG MORRISVILLE 40.21N 74.77W
06/29/2019 BUCKS PA PUBLIC
TREES DOWN. TIME ESTIMATED FROM RADAR.
0450 PM HAIL 1 W MOUNT LAUREL 39.94N 74.91W
06/29/2019 E0.75 INCH BURLINGTON NJ PUBLIC
0454 PM TSTM WND DMG 1 N BASKING RIDGE 40.72N 74.55W
06/29/2019 SOMERSET NJ PUBLIC
MPING REPORT OF TREE LIMBS DOWN AND PROPERTY
DAMAGE FROM THUNDERSTORM DAMAGE AT THIS
LOCATION. TIME ESTIMATED FROM RADAR.
0455 PM TSTM WND DMG BERNARDS TWP 40.70N 74.55W
06/29/2019 SOMERSET NJ PUBLIC
PHOTOS OF SEVERAL TREES DOWN IN THE AREA.
TIME ESTIMATED FROM RADAR.
0456 PM TSTM WND DMG MORRISTOWN 40.79N 74.47W
06/29/2019 MORRIS NJ DEPT OF HIGHWAYS
DOWNED TREE ON INTERSTATE 287 NORTHBOUND
RAMP TO EXIT 36. TIME ESTIMATED FROM RADAR.
0456 PM TSTM WND DMG BASKING RIDGE 40.71N 74.55W
06/29/2019 SOMERSET NJ PUBLIC
A TREE AND A FEW LARGE LIMBS DOWN. TIME
ESTIMATED FROM RADAR.
0457 PM TSTM WND DMG JACKSONVILLE 40.00N 74.78W
06/29/2019 BURLINGTON NJ PUBLIC
A TREE FELL ONTO A HOUSE IN MOUNT HOLLY.
TIME ESTIMATED FROM RADAR.
0500 PM HAIL BROWNS MILLS 39.97N 74.58W
06/29/2019 E0.70 INCH BURLINGTON NJ PUBLIC
TIME ESTIMATED FROM RADAR.
0500 PM TSTM WND DMG 2 S MONROE TWP 39.64N 74.98W
06/29/2019 GLOUCESTER NJ PUBLIC
MPING REPORT OF TREES AND POWER LINES DOWN
AT THIS LOCATION. TIME ESTIMATED FROM RADAR.
0502 PM HAIL 1 E WYOMING 39.12N 75.55W
06/29/2019 E0.25 INCH KENT DE PUBLIC
0505 PM TSTM WND DMG BROWNS MILLS 39.96N 74.58W
06/29/2019 BURLINGTON NJ PUBLIC
PHOTO OF SEVERAL HARDWOOD TREES DOWN IN
COUNTRY LAKES. TIME ESTIMATED FROM RADAR.
0506 PM TSTM WND DMG 2 NW WRIGHTSTOWN 40.06N 74.65W
06/29/2019 BURLINGTON NJ DEPT OF HIGHWAYS
DOWNED TREE ON STATE HIGHWAY 68 NEAR
MONMOUTH ROAD. ALL LANES CLOSED. TIME
ESTIMATED FROM RADAR.
0506 PM TSTM WND DMG 1 NNE PEMBERTON 39.99N 74.67W
06/29/2019 BURLINGTON NJ LAW ENFORCEMENT
FORT DIX ROAD CLOSED BETWEEN POINTVILLE ROAD
AND ODD FELLOWS ROAD FROM DOWNED TREES. TIME
ESTIMATED FROM RADAR.
0507 PM TSTM WND DMG 1 W NORTH PLAINFIELD 40.62N 74.44W
06/29/2019 SOMERSET NJ PUBLIC
PHOTOS OF MULTIPLE TREES DOWN. TIME
ESTIMATED FROM RADAR.
0509 PM TSTM WND DMG 2 W ESTELL MANOR 39.38N 74.86W
06/29/2019 CUMBERLAND NJ LAW ENFORCEMENT
REPORTS OF TREES DOWN NEAR AND WEST OF
ESTELL MANOR. TIME ESTIMATED FROM RADAR.
0510 PM MARINE TSTM WIND FORTESCUE 39.24N 75.18W
06/29/2019 M48 MPH CUMBERLAND NJ MESONET
NJWXNET SENSOR.
0510 PM HAIL 2 NNW HIGHLAND PARK 40.52N 74.43W
06/29/2019 E0.25 INCH MIDDLESEX NJ TRAINED SPOTTER
0511 PM TSTM WND DMG EDISON 40.54N 74.38W
06/29/2019 MIDDLESEX NJ TRAINED SPOTTER
TREES SPLIT. TIME ESTIMATED FROM RADAR.
0513 PM TSTM WND DMG METUCHEN 40.54N 74.36W
06/29/2019 MIDDLESEX NJ TRAINED SPOTTER
REPORT OF A LARGE TREE DOWN BLOCKING BOTH
DIRECTION OF MIDDLESEX AVENUE IN METUCHEN.
TIME ESTIMATED FROM RADAR.
0514 PM HAIL DOVER 39.16N 75.53W
06/29/2019 M1.00 INCH KENT DE TRAINED SPOTTER
PEA TO QUARTER SIZE HAIL FELL FROM 5:14 TO
5:22 PM.
0515 PM TSTM WND DMG 1 NE ISELIN 40.58N 74.31W
06/29/2019 MIDDLESEX NJ DEPT OF HIGHWAYS
DOWNED TREE ON STATE HIGHWAY 27 NEAR NEW
DOVER ROAD. TIME ESTIMATED FROM RADAR.
0515 PM MARINE TSTM WIND FORTESCUE 39.24N 75.17W
06/29/2019 M43 MPH CUMBERLAND NJ MESONET
0519 PM HAIL 1 SE METUCHEN 40.53N 74.36W
06/29/2019 E0.75 INCH MIDDLESEX NJ TRAINED SPOTTER
0521 PM TSTM WND GST PORT READING 40.57N 74.24W
06/29/2019 M68 MPH MIDDLESEX NJ TRAINED SPOTTER
0534 PM MARINE TSTM WIND SEASIDE PARK 39.94N 74.07W
06/29/2019 M41 MPH OCEAN NJ MESONET
WEATHERFLOW GAUGE.
0534 PM MARINE TSTM WIND 1 ENE LANOKA HARBOR 39.87N 74.14W
06/29/2019 M44 MPH OCEAN NJ MESONET
WEATHERFLOW GAUGE.
0536 PM TSTM WND GST SANDY HOOK 40.47N 74.01W
06/29/2019 M61 MPH MONMOUTH NJ MESONET
0536 PM HAIL EATONTOWN 40.31N 74.06W
06/29/2019 E1.75 INCH MONMOUTH NJ PUBLIC
TIME ESTIMATED FROM RADAR.
0537 PM HAIL WEST LONG BRANCH 40.29N 74.01W
06/29/2019 E1.75 INCH MONMOUTH NJ PUBLIC
GOLF BALL SIZE HAIL IN WEST LONG BRANCH.
TIME ESTIMATED FROM RADAR.
0538 PM TSTM WND DMG 1 ENE ASBURY PARK 40.22N 74.00W
06/29/2019 MONMOUTH NJ BROADCAST MEDIA
DAMAGE TO AN OUTDOOR STAGE AND EQUIPMENT
OWING TO THUNDERSTORM WINDS. TIME ESTIMATED
FROM RADAR.
0539 PM MARINE TSTM WIND BRICK 40.01N 74.06W
06/29/2019 M55 MPH OCEAN NJ MESONET
WEATHERFLOW GAUGE.
0540 PM TSTM WND DMG MIDDLETOWN 40.41N 74.13W
06/29/2019 MONMOUTH NJ PUBLIC
SEVERAL DOWNED TREES, BRANCHES, AND POWER
LINES REPORTED. TIME ESTIMATED FROM RADAR.
0540 PM MARINE TSTM WIND 1 ESE MANASQUAN 40.12N 74.03W
06/29/2019 M43 MPH MONMOUTH NJ MESONET
0542 PM MARINE TSTM WIND 2 WSW SHIP BOTTOM 39.64N 74.21W
06/29/2019 M52 MPH ANZ451 NJ MESONET
WEATHERFLOW GAUGE.
0542 PM MARINE TSTM WIND ATLANTIC CITY 39.38N 74.42W
06/29/2019 M40 MPH ANZ452 NJ MESONET
0543 PM MARINE TSTM WIND 2 NNE STRATHMERE 39.22N 74.64W
06/29/2019 M40 MPH CAPE MAY NJ MESONET
WEATHERFLOW GAUGE.
0544 PM MARINE TSTM WIND 2 SE PLEASANTVILLE 39.37N 74.50W
06/29/2019 M39 MPH ATLANTIC NJ MESONET
WEATHERFLOW GAUGE.
0545 PM MARINE TSTM WIND 1 NNW SEA ISLE CITY 39.17N 74.70W
06/29/2019 M43 MPH ANZ453 NJ MESONET
WEATHERFLOW GAUGE.
0545 PM TSTM WND GST TILGHMAN 38.72N 76.33W
06/29/2019 M63 MPH TALBOT MD MESONET
MDDOT GAUGE.
0545 PM TSTM WND DMG EATONTOWN 40.31N 74.06W
06/29/2019 MONMOUTH NJ PUBLIC
SEVERAL REPORTS OF TREES AND LIMBS DOWN IN
EATONTOWN. TIME ESTIMATED FROM RADAR.
0545 PM MARINE TSTM WIND MANTOLOKING 40.04N 74.05W
06/29/2019 M56 MPH OCEAN NJ MESONET
0545 PM MARINE TSTM WIND NORTH WILDWOOD 39.01N 74.80W
06/29/2019 M47 MPH CAPE MAY NJ MESONET
0545 PM MARINE TSTM WIND 1 ENE CAPE MAY POINT 38.94N 74.94W
06/29/2019 M39 MPH CAPE MAY NJ MESONET
0545 PM TSTM WND DMG 2 NNE TOMS RIVER 39.97N 74.18W
06/29/2019 OCEAN NJ FIRE DEPT/RESCUE
SEVERAL REPORTS OF TREES AND WIRES DOWN IN
THIS AREA FROM 530 TO 600 PM. TIME BASED ON
A COMBINATION OF RADAR, NEARBY SURFACE
OBSERVATIONS, AND SOCIAL MEDIA REPORTS.
0546 PM TSTM WND DMG 1 SSW TOMS RIVER 39.94N 74.20W
06/29/2019 OCEAN NJ TRAINED SPOTTER
MULTIPLE TREES DOWN ON HOMES WITH WIRES DOWN
THROUGHOUT SOUTH TOMS RIVER.
0554 PM MARINE TSTM WIND CAPE MAY HARBOR 38.95N 74.89W
06/29/2019 M54 MPH CAPE MAY NJ MESONET
0559 PM MARINE TSTM WIND 2 WNW LEWES 38.79N 75.16W
06/29/2019 M56 MPH SUSSEX DE MESONET
WEATHERFLOW GAUGE.
0600 PM MARINE TSTM WIND 1 ENE LEWES 38.78N 75.12W
06/29/2019 M46 MPH ANZ431 DE MESONET
0602 PM MARINE TSTM WIND 1 SSW NORTH CAPE MAY 38.97N 74.96W
06/29/2019 M59 MPH CAPE MAY NJ MESONET
WEATHERFLOW GAUGE.
0602 PM TSTM WND GST 1 SSW NORTH CAPE MAY 38.97N 74.96W
06/29/2019 M59 MPH CAPE MAY NJ MESONET
WEATHERFLOW GAUGE.
0608 PM MARINE TSTM WIND INDIAN BEACH 38.68N 75.08W
06/29/2019 M49 MPH SUSSEX DE MESONET
WEATHERFLOW GAUGE.
&&
$$
CMS/ADS/TCD
Chester County Downbursts and Hail
 |
 |
 |
| Figure 1: KDIX radar reflectivity factor (top left), base velocity (top right), differential reflectivity (ZDR; bottom left), and correlation coefficient (CC; bottom right) for the 2.4 degree elevation angle valid at 1917 UTC 29 June 2019. This elevation scan is around 20,000 to 25,000 feet above the ground in the western portions of Chester County and adjacent areas. The radar reflectivity factor is greater than 70 dBZ with the storm in eastern Lancaster County (just northeast of Quarryville), which is strongly indicative of impending severe weather (and sizable hail lofted by the updraft). Though range folding is occurring in the region of the storm of interest (note the band of purple in the ZDR and CC images), there are indications of a three-body scatter spike to the west of the storm (low CC west of Quarryville). The storm northwest of Coatesville is also likely severe, with 60-65 dBZ observed at these heights. Several reports of severe weather occurred with these two storms in the 15 minutes following this scan. | Figure 2: Same as Fig. 1, valid at 1930 UTC 29 June 2019. The higher reflectivities have diminished but remain quite high (55-60 dBZ) at the 20,000-25,000 foot level, indicating severe weather is still likely with both storms. Another storm is developing near Honey Brook. A mere 15 minutes later, the characteristics of the storms aloft had changed dramatically. The lowering of the reflectivity at this level is actually indicative of the heaviest precipitation descending to the ground (and is correlated strongly with the timing of the severe reports from these storms). The nature of these storms is pulse-like; that is, the storm intensifies rapidly, with high reflectivities aloft that descend to the ground quickly (followed by weakening of the storm). | Figure 3: Same as Fig. 1, valid at 1942 UTC 29 June 2019. Note the Honey Brook storm is now the most intense aloft, whereas the other two storms continue to exhibit lowering reflectivities (as the downdrafts continue to descend). Severe reports continued with all three storms in Chester County at this point, with widespread tree damage across the county. |
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 |
 |
| Figure 4: As in Fig. 1, looped from 1914 UTC to 1954 UTC 29 June 2019, for the 0.5 degree elevation angle, which ends up being about 5000-5500 feet above the ground in Chester County. We see the initially distinct storms west of Coatesville and east of Quarryville quickly congeal as they progress into west-central Chester County. Meanwhile, the developing storm near Honey Brook quickly intensifies and propagates downstream rapidly, with the storms forming a loosely organized band by the end of the animation. Note how each of the storms pulses upward and then downward in intensity (given the increasing and then decreasing reflectivity), with new development on the flanks of the antecedent cells. The process of convective regeneration is critical to the maintenance of the storms and to the increased organization with time. The individual updrafts and downdrafts generally last about 30 to 45 minutes, but the rain-cooled air within the downdraft (a so-called cold pool) impinges upon unstable air surrounding the initial storm, forcing new updrafts to develop. This process continues until insufficient instability exists to generate subsequent updrafts. As the cold pools expand, the storms increasingly congeal/organize, and larger-scale flow develops. This is especially apparent with the northern-most cell in the animation, with base velocities noticeably increasing as the storm intensifies and then grows/congeals with the storms to the south. As this convective evolution continues, the localized wind damage with the initial cells becomes more widespread as the storms organize. Numerous instances of wind damage occur between Kennett Square and Phoenixville as a result. | Figure 5: KDIX cross-section of radar reflectivity factor for the cell east of Quarryville, PA, in Lancaster and Chester Counties at 1926 UTC on 29 June 2019. Radar reflectivity factor reaches 70 dBZ up to 20,000 feet and 60 dBZ up to 35,000 feet (indicative of an intense updraft). Notably, the storm exhibits little vertical tilt (i.e., the radar reflectivity generally is upright). This is indicative of weak vertical shear and explains why the individual updrafts of storms intensified and diminished relatively quickly. | Figure 6: Same as Fig. 5, valid at 1939 UTC 29 June 2019. The same storm about 15 minutes later is ultimately collapsing, with the highest reflectivity near the ground now and much weaker reflectivity (though still relatively strong, in general) aloft. New updrafts are generating downstream and on the north/south sides of the storm, as the current storm's cold pool forces unstable air upward. |
Burlington/Ocean County Wind Damage
 |
| Figure 7: As in Fig. 4, valid from 2046 to 2121 UTC 29 June 2019. The loosely organized line of storms at the beginning of the animation is moving across the Delaware River. The storms have become more cellular and less organized; however, the cold pool remains strong, with severe winds reported in much of southeastern Bucks and northeastern Philadelphia Counties. However, the winds diminish somewhat as the outflow crosses into New Jersey. Meanwhile, clusters of storms have developed near and east of Mount Holly to central portions of Ocean County. The cell immediately west of the radar (KDIX) has generated a microburst (Note the localized very strong base velocities that actually fold from green to red colors as the storm approaches KDIX; this microburst actually started before the animation, in the Mount Holly area.), with several reports of wind damage in this general vicinity. The storm also generates an outflow boundary that propagates northward into Monmouth County and westward toward the line of storms. This outflow boundary serves to rejuvenate the loosely organized storms in western Burlington County, and more wind damage occurs east of Mount Holly as the line re-intensifies. Additionally, storms develop along the intersection of outflow boundaries northward into Monmouth County near the end of the animation. These storms became severe subsequent to the animation shown here as they approached the coast, with several reports of wind damage from Sandy Hook to Asbury Park. Near the end of the animation, there are two distinct lines of wind maxima. One is approaching Toms River as the storm that produced a microburst in Burlington County continues to be severe as it approaches coastal Ocean County (several reports of wind damage in this area). The second is approaching the radar, with sporadic reports of gusty/strong winds and sporadic damage in the Pemberton, Browns Mills, and Fort Dix areas. |
North New Jersey Wind Damage and Hail
 |
| Figure 8: As in Fig. 4, valid from 2016 to 2056 UTC 29 June 2019. Storms had generated on an ambient surface boundary (aided in part from differential heating) from southern Sussex County through northern Morris County. The storms intensify rapidly in southeast Sussex County, in an environment of moderate instability and locally stronger shear (aided by the preexisting boundary and somewhat stronger deep-layer flow in this region versus farther south). The storm produced significant wind damage in Byram Township and Stanhope in Sussex County and continued to produce tree damage in much of Morris County. Sub-severe hail was also reported in western Morris County, timed closely with the storm's appearance of stronger rotation (as evident with base velocities) and non-uniform beam filling seen down-radial (northwest) of the storm in CC at the time the strongest reflectivities occurred. Radar did not exhibit much indication of severe hail, which was consistent with ground reports. As the cold pool strengthened, additional storms to the south rapidly intensified with the added lift provided by the strong downdraft generated to the north. A line of storms formed with an apparent bowing segment near and northwest of Morristown, where a maximum in wind-damage reports occurred. As the line moved southeast, additional damage reports were received from northern Somerset and northern Middlesex Counties. |
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