Overview
Severe thunderstorms with large hail moved through the Devils Lake region on the evening of Thursday June 14 and the early morning hours of Friday June 15, 2018. Three tornadoes occurred with this activity, two in northern Towner county and one in western Cavalier county. A second round of severe thunderstorms developed over southeast North Dakota in the early morning hours of June 15th, mainly from Lisbon to the Fargo-Moorhead area. These storms also produced large hail.Tornadoes:
On the night of June 14, 2018, a severe thunderstorm produced three tornadoes in northern Towner County and western Cavalier County. This storm also had multiple reports of hail. The largest hail reported from severe thunderstorms in northeast North Dakota on this night was golf ball sized.
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Tornado #1 - Mountain View Township
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Tornado #2 - Rural Towner County
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Tornado #3 - Calio, ND
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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 |
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Tornado Warnings
Here are base 0.5 degree reflectivity and Storm Relative Motion (SRM) images for each of the two tornado warnings, from about the time each was issued.
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| TOR 1 Reflectivity | TOR 1 SRM | TOR 2 Reflectivity | TOR 2 SRM |
Radar:
Mayville Radar 4 pm to 10 pm Thu
Mayville Radar 10 pm to 4 am Fri
Storm Reports
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0455 PM HAIL BISBEE 48.63N 99.38W
06/14/2018 E1.25 INCH TOWNER ND PUBLIC
HALF DOLLAR AND QUARTER SIZED HAIL FELL FROM 455 PM TO
510 PM
0510 PM HAIL BISBEE 48.63N 99.38W
06/14/2018 E1.25 INCH TOWNER ND PUBLIC
PUBLIC REPORTED SEVERAL HALF DOLLAR HAIL STONES ALONG
WITH MULTIPLE QUARTER SIZED HAIL STONES. HAIL LASTED FOR
10 TO 15 MINUTES.
0530 PM HAIL 4 NW EGELAND 48.67N 99.16W
06/14/2018 E1.75 INCH Towner ND PUBLIC
PUBLIC REPORTED PEA TO GOLF BALL SIZED HAIL. TIME
ESTIMATED BY RADAR.
0545 PM HAIL 3 N EGELAND 48.67N 99.10W
06/14/2018 E1.75 INCH Towner ND PUBLIC
PUBLIC REPORTED GOLF BALL HAIL. PEA TO MARBLE SIZED HAIL
LASTED AROUND 25 MINUTES PRIOR TO THE GOLF BALL HAIL.
0555 PM HAIL 3 N CALIO 48.67N 98.94W
06/14/2018 E1.50 INCH Cavalier ND PUBLIC
0630 PM HAIL 6 W LANGDON 48.76N 98.50W
06/14/2018 E1.50 INCH Cavalier ND TRAINED SPOTTER
HAILSTONES RANGED FROM 1 INCH TO 1.5 INCHES. TIME
APPROXIMATE.
0630 PM HAIL 14 WSW LANGDON 48.68N 98.66W
06/14/2018 M2.00 INCH Cavalier ND PUBLIC
SOCIAL MEDIA POST RELATED THROUGH LOCAL MEDIA SHOWS LARGE
2 INCH HAIL STONES NEXT TO RULER.
0918 PM TORNADO 5 WSW AMOURDALE 48.84N 99.47W
06/14/2018 F1 Towner ND NWS STORM SURVEY
A PARTIALLY RAIN WRAPPED TORNADO LIKELY TRACKED
INTERMITTENTLY TO THE SOUTHEAST FOR ABOUT 3 MILES, ENDING
ABOUT 4 SSW OF AMOURDALE BY 924 PM CDT. AT LEAST ONE
POWER POLE WAS CRACKED AND POWER LINES WERE TORN DOWN IN
CENTRAL MOUNTAIN VIEW TOWNSHIP. PEAK WINDS ESTIMATED TO
95 MPH. MAXIMUM WIDTH TO 200 YARDS. TIME BASED ON RADAR
AND SPOTTER REPORTS.
0935 PM TSTM WND DMG 1 W ROCKLAKE 48.79N 99.27W
06/14/2018 Towner ND PUBLIC
2 HOPPER BOTTOMED GRAIN BINS AND A GRAIN DRYER WERE BLOWN
OVER AT A SITE JUST WEST OF THE LAKE. A 5K BUSHEL STEEL
GRAIN BIN WAS DENTED IN NEAT THE ROOF LINE. TIME
ESTIMATED BASED ON RADAR.
0937 PM TSTM WND DMG ROCKLAKE 48.79N 99.25W
06/14/2018 Towner ND PUBLIC
REPORT OF TREES BLOWN DOWN AROUND TOWN. TIME ESTIMATED
BASED ON RADAR. A STORM SURVEY ALSO FOUND THAT SOME STEEL
SIDING HAD BEEN TORN OFF THE SIDES OF A GRAIN CLEANING
FACILITY.
0945 PM TORNADO 4 SSW ROCKLAKE 48.74N 99.28W
06/14/2018 F1 Towner ND NWS STORM SURVEY
A PARTIALLY RAIN WRAPPED TORNADO LIKELY TRACKED EASTWARD
FOR ROUGHLY 4 MILES ACROSS SOUTHERN VIRGINIA TOWNSHIP,
ENDING ABOUT 6 NNW OF EGELAND BY 956 PM CDT. THE TORNADO
PICKED AND TOSSED A HOPPER BOTTOM GRAIN BIN ABOUT 40
YARDS TO THE SOUTHWEST, BLEW DOWN CATTLE FENCING AT A
FARMSTEAD, AND BROKE DOWN NUMEROUS LARGE TREE BRANCHES
AND LIMBS ALONG ITS PATH. MAXIMUM WIDTH ESTIMATED TO 250
YARDS. PEAK WINDS ESTIMATED TO 90 MPH. TIME BASE ON
RADAR.
1008 PM TSTM WND DMG 8 N CANDO 48.60N 99.20W
06/14/2018 Towner ND NWS STORM SURVEY
POPLAR TREE SNAPPED IN SHELTER BELT. TIME ESTIMATED BASED
ON RADAR.
1023 PM HAIL 5 WNW CANDO 48.52N 99.30W
06/14/2018 E1.75 INCH Towner ND TRAINED SPOTTER
A FEW PING PONG BALL TO GOLF BALL SIZED HAIL IN VERY
HEAVY RAIN. TIME ESTIMATED BASED ON RADAR.
1024 PM TORNADO CALIO 48.62N 98.94W
06/14/2018 F1 Cavalier ND NWS STORM SURVEY
A PARTIALLY RAIN WRAPPED TORNADO LIKELY TRACKED 3 TO 4
MILES TO THE ESE, FROM THE NORTHWEST CORNER OF CALIO INTO
NORTHEAST SEIVERT TOWNSHIP, ENDING ROUGHLY 3 SSW OF
MUNICH BY 1033 PM CDT. THE TORNADO BLEW DOWN SEVERAL
TREES IN CALIO AND TORE SOME STEEL SHEETS OF A SHOP ROOF.
PEAK WINDS ESTIMATED TO 95 MPH. MAXIMUM WIDTH TO 200
YARDS.
1025 PM HAIL 7 WNW CANDO 48.53N 99.34W
06/14/2018 E1.75 INCH Towner ND PUBLIC
PUBLIC ESTIMATED GOLF BALL SIZED HAIL IN THE CANDO AREA.
TIME AND LOCATION ESTIMATED BY RADAR.
1034 PM HAIL MUNICH 48.67N 98.83W
06/14/2018 E1.00 INCH CAVALIER ND TRAINED SPOTTER
1044 PM HAIL 8 SSW MUNICH 48.56N 98.90W
06/14/2018 E1.00 INCH Cavalier ND PUBLIC
HEAVY RAIN AND A FEW LARGE HAIL. SEVERAL LARGER TREE
BRANCHES BROKEN DOWN AS WELL.
1045 PM HAIL 5 SE CALIO 48.57N 98.86W
06/14/2018 E1.00 INCH Cavalier ND PUBLIC
PUBLIC ESTIMATED ONE INCH HAIL. TIME ESTIMATED FROM
RADAR.
1125 PM HAIL 5 WSW HAMPDEN 48.51N 98.76W
06/14/2018 E1.00 INCH Ramsey ND PUBLIC
A COUPLE MINUTES OF DIME TO QUARTER SIZED HAIL AND A
QUICK HALF INCH OR RAIN.
1130 PM TSTM WND DMG 3 S HARLOW 48.12N 99.52W
06/14/2018 Benson ND PUBLIC
SEVERAL LARGE TREE BRANCHES AND LIMBS BROKEN DOWN IN
FARMSTEAD SHELTER BELTS IN SOUTHERN BUTTE VALLEY
TOWNSHIP.
1145 PM HAIL 6 N MINNEWAUKAN 48.16N 99.25W
06/14/2018 E1.50 INCH Benson ND PUBLIC
SOME CROP DAMAGE NOTED ACROSS NORTHEAST RIGGIN TOWNSHIP.
TIME ESTIMATED BASED ON RADAR.
1210 AM HAIL 11 NW DEVILS LAKE 48.23N 99.04W
06/15/2018 E0.88 INCH Ramsey ND PUBLIC
PUBLIC ESTIMATED NICKEL SIZED HAIL AND REPORTED 0.7 IN OF
RAINFALL. TIME ESTIMATED FROM RADAR.
1230 AM HAIL 7 N DEVILS LAKE 48.21N 98.87W
06/15/2018 E1.00 INCH Ramsey ND PUBLIC
PUBLIC ESTIMATED PEA TO QUARTER SIZED HAIL.
1240 AM HAIL 3 NW ENDERLIN 46.65N 97.64W
06/15/2018 E0.75 INCH Cass ND TRAINED SPOTTER
0110 AM HAIL 4 NE ENDERLIN 46.67N 97.54W
06/15/2018 E0.50 INCH Cass ND PUBLIC
0200 AM HAIL 2 S WEST FARGO 46.84N 96.90W
06/15/2018 E0.50 INCH Cass ND PUBLIC
PEA TO MARBLE SIZED HAIL NEAR VETERANS BLVD AND 32ND AVE
S
0200 AM HAIL HORACE 46.76N 96.90W
06/15/2018 E1.50 INCH CASS ND PUBLIC
VIA WDAY TWITTER
0200 AM HAIL HORACE 46.76N 96.90W
06/15/2018 E1.00 INCH CASS ND PUBLIC
VIA LOCAL MEDIA FACEBOOK PAGE
0200 AM TSTM WND DMG FARGO 46.88N 96.82W
06/15/2018 CASS ND PUBLIC
PUBLIC REPORTS LARGE TREE BRANCHES DOWN. TIME ESTIMATED
FROM RADAR.
0207 AM HAIL 2 SSE FARGO 46.85N 96.80W
06/15/2018 E1.00 INCH Cass ND BROADCAST MEDIA
MOSTLY PEA TO DIME SIZED WITH QUARTERS MIXED IN AND THE
HAIL OCCURED FOR 10 MINUTES
0207 AM HAIL 1 S MOORHEAD 46.85N 96.76W
06/15/2018 E1.00 INCH Clay MN PUBLIC
0210 AM HAIL 1 NNE PRAIRIE ROSE 46.83N 96.83W
06/15/2018 E1.00 INCH Cass ND TRAINED SPOTTER
Rain Reports
These rainfall reports may be a little low for the areas that had the strong thunderstorms. However, they do depict that the Devils Lake region had the most rainfall, with not too much in other areas.
Environment
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| Surface Map 4 pm Thu | Surface Map 7 pm Thu | Surface Map 10 pm Thu |
| Loop of Sig Tor Parameter | Loop of Storm Relative Helicity | Loop of VGP |
Additional Information
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| SPC Day 1 Severe Risk Graphic | SPC Tornado Watch Graphic | NWS Grand Forks Warnings |
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