Overview
A line of showers and thunderstorms raced east-northeast across western Kentucky and southwest Indiana, producing pockets of damaging wind and a couple of brief tornadoes.Tornadoes:
Tornado #1 - East of Mariah Hill Indiana
Track Map
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Tornado #2 - Blue Water Estates Kentucky
Track Map
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The Enhanced Fujita (EF) Scale classifies tornadoes into the following categories:
EF0 Weak 65-85 mph |
EF1 Moderate 86-110 mph |
EF2 Significant 111-135 mph |
EF3 Severe 136-165 mph |
EF4 Extreme 166-200 mph |
EF5 Catastrophic 200+ mph |
Wind Overview:
The primary severe weather event type was wind. In addition to thunderstorm winds, there were strong gusty non-thunderstorm winds associated with a deepening low pressure system over the mid Mississippi Valley. Please check the "non-thunderstorm winds" tab of this web summary for more information. Little or no hail was associated with the storms.
Wind (details)
The line of showers and thunderstorms produced the first couple of microbursts in extreme western Kentucky in Paducah and Graves County. Damaging winds became more frequent as the line moved east across the Murray, Cadiz, and Hopkinsville areas. Pockets of tree damage were reported across Calloway, Trigg, Christian, Todd, and Muhlenberg Counties. NWS damage surveys concluded there were a couple of isolated tornadoes, including one in northeast Spencer County, Indiana and a second in Trigg County, KY.
The following are the results of two damage surveys conducted on Monday, December 31:
1. PADUCAH, KY............
Public Information Statement National Weather Service Paducah, KY 845 PM CST Mon Dec 31 2018 ...NWS DAMAGE SURVEY FOR 12/31/2018 MCCRACKEN COUNTY KY MICROBURST... Peak wind /Estimated/: 80 mph Path length /Statute/: 1.0 mile Path width /Maximum/: 0.6 mile Fatalities: Zero Injuries: Zero Start date: 12/31/2018 Start time: 11:47 AM CST Start location: 4 miles W of downtown Paducah, KY (just east of intersection of Cairo Rd. and Interstate 24) End date: 12/31/2018 End time: 11:48 AM CST End location: 3.5 miles NW of downtown Paducah, KY (just north of Cairo Rd. and Noble Rd. intersection) SURVEY_SUMMARY: The damage was generally along and north of Cairo Rd. and east of Interstate 24. Loss of metal siding or roofing occurred on at least three businesses, and loss of shingles occurred on at least one home. An HVAC unit was dislodged atop Rural King. Metal fencing was blown off a business on Moody Rd. Several trees or tree limbs were broken or uprooted, and two power and security light poles were damaged or blown over. NOTE: The information in this statement is PRELIMINARY and subject to change pending final review of the event and publication in NWS Storm Data.
2. GRAVES COUNTY, KY (SYMSONIA AREA)............
Public Information Statement National Weather Service Paducah, KY 658 PM CST Mon Dec 31 2018 ...NWS DAMAGE SURVEY FOR 12/31/2018 GRAVES COUNTY KY THUNDERSTORM WIND EVENT... Peak wind /Estimated/: 75 mph Path length /Statute/: 1.0 mile Path width /Maximum/: 0.4 mile Fatalities: Zero Injuries: Zero Start date: 12/31/2018 Start time: 11:52 AM CST Start location: 5 miles SW Symsonia, KY End date: 12/31/2018 End time: 11:53 AM CST End location: 4.5 miles W Symsonia, KY SURVEY_SUMMARY: Straight line thunderstorm winds damaged at least three buildings, including the lifting of the roof structure from a carport. Several tree limbs were broken. NOTE: The information in this statement is PRELIMINARY and subject to change pending final review of the event and publication in NWS Storm Data.
Non-thunderstorm winds:
Following the passage of the line of showers and storms, winds increased again from the west-southwest. There were several gusts around 40 mph late in the afternoon.
The following are reports of strong winds that were not associated with thunderstorms:
Below is the weather map for Monday, Dec. 31 at noon.
Photos
Damage survey pictures
West of Symsonia, KY microburst (NWS photo) |
West of Symsonia, KY (NWS photo) |
Storm Reports
PRELIMINARY LOCAL STORM REPORT...SUMMARY NATIONAL WEATHER SERVICE PADUCAH KY 1033 PM CST MON DEC 31 2018 ..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON... ..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE.... ..REMARKS.. 1146 AM TSTM WND DMG 6 N METROPOLIS 37.24N 88.71W 12/31/2018 MASSAC IL PUBLIC A LARGE OAK TREE FELL ACROSS A DRIVEWAY 1 MILE SOUTH OF ROUND KNOB. 1147 AM DOWNBURST 4 W PADUCAH 37.10N 88.68W 12/31/2018 MCCRACKEN KY NWS STORM SURVEY NWS DAMAGE SURVEY FOUND THAT A MICROBURST WITH ESTIMATED PEAK WINDS OF 80 MPH OCCURRED IN PADUCAH. THE EVENT BEGAN AT 11:47 AM CST ABOUT 4 MILES W OF DOWNTOWN PADUCAH (JUST EAST OF THE INTERSECTION OF CAIRO RD. AND I-24) AND ENDED AT 11:48 AM CST 3.5 MILES NW OF DOWNTOWN PADUCAH (JUST NORTH OF THE INTERSECTION OF CAIRO RD. AND NOBLE RD.). THE DAMAGE WAS GENERALLY ALONG AND NORTH OF CAIRO RD. AND EAST OF I-24. LOSS OF METAL SIDING OR ROOFING OCCURRED ON AT LEAST THREE BUSINESSES AND AT LEAST ONE HOME. AN HVAC UNIT WAS DISLODGED ATOP RURAL KING. METAL FENCING WAS BLOWN OFF A BUSINESS ON MOODY RD. SEVERAL TREES OR TREE LIMBS WERE BROKEN OR DAMAGED, AND TWO POWER AND SECURITY LIGHT POLES WERE DAMAGED OR BLOWN OVER. 1147 AM TSTM WND DMG 2 NW PADUCAH 37.09N 88.66W 12/31/2018 MCCRACKEN KY PUBLIC ROOF DAMAGE REPORTED AT THE RURAL KING INCLUDING AN AC UNIT THAT WAS TORN OFF THE ROOF. 1152 AM TSTM WND DMG 5 SW SYMSONIA 36.86N 88.57W 12/31/2018 GRAVES KY NWS STORM SURVEY NWS DAMAGE SURVEY FOUND STRAIGHT LINE WIND DAMAGE WITH ESTIMATED PEAK WINDS OF 75 MPH. THE DAMAGE STARTED AT 11:52 AM CST 5 MILES SW OF SYMSONIA, KY, AND ENDED AT 11:53 AM CST 4.5 MILES W OF SYMSONIA, KY. THE DAMAGE PATH WAS 1 MILE IN LENGTH WITH A MAXIMUM PATH WIDTH OF 0.4 MILES. AT LEAST THREE BUILDINGS WERE DAMAGED, INCLUDING THE ROOF STRUCTURE BEING LIFTED OFF A CARPORT. SEVERAL TREES OR TREE LIMBS WERE BROKEN. 1154 AM TSTM WND DMG 4 W SYMSONIA 36.90N 88.58W 12/31/2018 GRAVES KY EMERGENCY MNGR SIGNIFICANT DAMAGE TO A BARN ON KY 994 ACROSS FROM THE NORTH GRAVES FIRE DEPARTMENT. 1210 PM TSTM WND DMG MURRAY 36.61N 88.32W 12/31/2018 CALLOWAY KY TRAINED SPOTTER DOWNED TREES REPORTED IN MURRAY AND ON THE NORTH SIDE OF CALLOWAY COUNTY.REPORT OF A DOWNED TREE BLOCKING RADIO ROAD CLOSE TO THE NORTHSIDE BAPTIST CHURCH. SCATTERED POWER OUTAGES ALSO REPORTED IN MURRAY AND NORTH SIDE OF COUNTY. 1215 PM TSTM WND GST 3 ESE KIRKSEY 36.66N 88.37W 12/31/2018 M59 MPH CALLOWAY KY AWOS AWOS STATION CEY, MURRAY KY. 1215 PM TSTM WND DMG BENTON 36.85N 88.36W 12/31/2018 MARSHALL KY EMERGENCY MNGR 8000 REPORTED WITHOUT POWER IN MARSHALL COUNTY. 1234 PM NON TSTM WND STURGIS 37.55N 87.99W 12/31/2018 UNION KY EMERGENCY MNGR KY 365/N MONROE ST. BLOCKED DUE TO A BUILDING WITH STRUCTURAL DAMAGE. 1238 PM TSTM WND DMG CADIZ 36.87N 87.82W 12/31/2018 TRIGG KY TRAINED SPOTTER NUMEROUS POWER OUTAGES REPORTED ACROSS THE COUNTY. 1238 PM TSTM WND DMG CADIZ 36.87N 87.82W 12/31/2018 TRIGG KY TRAINED SPOTTER NUMEROUS POWER OUTAGES REPORTED ACROSS THE COUNTY. 1245 PM TSTM WND DMG HAWKINS 37.03N 87.65W 12/31/2018 CHRISTIAN KY TRAINED SPOTTER TREES DOWN AND 85MPH WINDS MEASURED IN HAWKINS NEAR HWY 91 AT MILE MARKER 15. 0105 PM TSTM WND GST 2 SW HOPKINSVILLE 36.83N 87.52W 12/31/2018 M68 MPH CHRISTIAN KY TRAINED SPOTTER 0119 PM TSTM WND DMG ELKTON 36.81N 87.15W 12/31/2018 TODD KY 911 CALL CENTER TREES DOWN COUNTYWIDE. TIME ESTIMATED FROM RADAR. 0123 PM TSTM WND DMG GREENVILLE 37.20N 87.18W 12/31/2018 MUHLENBERG KY 911 CALL CENTER TREES DOWN COUNTYWIDE. TIME ESTIMATED FROM RADAR. 0144 PM TSTM WND DMG 4 SE SAINT HENRY 38.17N 86.89W 12/31/2018 SPENCER IN PUBLIC PRELIMINARY REPORT. SHED/OUTBUILDING COMPLETELY TORN APART/DESTROYED. SMALL YARDBARN DESTROYED. ROOFING/SHINGLES MISSING FROM HOUSE, FLASHING OFF OF GARAGE AND UNDER PORCH. NEIGHBOR WITH PART OF ROOF TORN OFF OF HOME. DELAYED REPORT. TIME ESTIMATED FROM RADAR. Map of preliminary storm reports on December 31, 2018
Environment -
A deepening low pressure system tracked northeast from Arkansas across the St. Louis area to Indiana. A warm front lifted north across the lower Ohio Valley in the morning, followed by unseasonably warm and moist air. A cold front then moved east, triggering a line of showers and thunderstorms along the Mississippi River by midday. This line of showers and storms raced east across western Kentucky and southwest Indiana during the afternoon.
Figure 1: Surface map 18z Dec. 31 |
Near-storm environment summary.
Figure 4: CAPE forecast (RAP model) | Figure 6: Sfc dew points (observed) |
Additional environmental data.
Figure 7: Svr Tstm Watch 450 | Figure 8: Day 1 Svr Outlook | Figure 9: Mesoscale Discussion 1747 |
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