Overview
During the afternoon and evening of July 8, 2019, strong to severe thunderstorms produced heavy rain and wind damage across portions of eastern North Dakota and west central Minnesota.
Wind Reports:
Damaging wind gusts were the main threats with strong to severe thunderstorms in this event (in addition to heavy rainfall), although isolated hail was reported with some storms. Thunderstorm wind gusts damaged trees and structures across parts of the region.
Severe Weather Reports across the Region
(Red symbols denote tornado reports; blue symbols denote wind reports)
(Click image to enlarge)
PRELIMINARY LOCAL STORM REPORT...SUMMARY NATIONAL WEATHER SERVICE GRAND FORKS ND 1206 PM CDT WED JUL 10 2019 ..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON... ..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE.... ..REMARKS.. 0310 PM HAIL 11 ENE ROCKLAKE 48.85N 99.02W 07/08/2019 E1.00 INCH Towner ND PUBLIC LARGE HAIL AND STRONG WINDS DAMAGED CROPS IN EAST CENTRAL LANSING TOWNSHIP. TIME ESTIMATED BASED ON RADAR. 0406 PM TORNADO 4 S NEWVILLE 48.49N 99.00W 07/08/2019 Towner ND TRAINED SPOTTER TRAINED SPOTTER LOCATED NORTH OF STARKWEATHER REPORTED BRIEF TORNADO TOUCHDOWN ROUGHLY 4 TO 5 MILES TO THEIR WEST NORTHWEST. 0430 PM TSTM WND DMG 10 SW MADDOCK 47.86N 99.68W 07/08/2019 Benson ND PUBLIC WIND AND WIND DRIVEN HAIL DID CNSIDERABLE CROP DAMAGE ACROSS SOUTHERN EAST FORK TOWNSHIP. SECTIONS OF CROPLAND WERE LAID FLAT. 0435 PM TSTM WND DMG 5 S CALIO 48.55N 98.94W 07/08/2019 Cavalier ND PUBLIC CROPS WERE LAID FLAT OVER ACROSS SOUTHERN SEIVERT TOWNSHIP A MUTIPLE ROUNDS OF LARGE HAIL, STRONG WINDS AND HEAVY RAINS BETWEEN 430 AND 5 PM CDT. 0455 PM TSTM WND GST LANGDON 48.76N 98.37W 07/08/2019 M54.00 MPH CAVALIER ND AWOS REPORT FROM LANGDON AWOS AT THE LANGDON AIRPORT. 0501 PM TSTM WND GST 1 E LANGDON 48.76N 98.35W 07/08/2019 M63.00 MPH Cavalier ND MESONET NDAWN SENSOR - 10 M WIND. 0600 PM TSTM WND DMG 3 SSE SOUTHAM 48.12N 98.53W 07/08/2019 Ramsey ND PUBLIC A FEW LARGE BRANCHES BROKEN DOWN IN A SHELTER BELT. 0605 PM TSTM WND DMG 6 S HAMAR 47.76N 98.57W 07/08/2019 Eddy ND PUBLIC LARGE BRANCHES AND LIMBS WERE BROKEN DOWN IN FARMSTEADS AND TREE CLAIMS THROUGH CENTRAL COLVIN TOWNSHIP. 0615 PM TSTM WND GST CAVALIER 48.80N 97.62W 07/08/2019 M61.00 MPH Pembina ND AWOS GUST TO 61 MPH AT CAVALIER AIRPORT SITE K2C8 0625 PM TSTM WND DMG HAMILTON 48.81N 97.45W 07/08/2019 Pembina ND COUNTY OFFICIAL SEVERAL LARGE TREE BRANCHES BROKEN DOWN IN TOWN. 0629 PM TSTM WND GST 2 NE PEKIN 47.81N 98.30W 07/08/2019 M75.00 MPH Nelson ND MESONET WIND GUSTS TO 75 MPH. NORTH DAKOTA AGRICULTURAL WEATHER NETWORK. 0633 PM TSTM WND DMG PEKIN 47.79N 98.33W 07/08/2019 NELSON ND LAW ENFORCEMENT LAW ENFORCEMENT REPORTED CARS BEING BLOWN OFF ROADWAY NEAR PEKIN ON HIGHWAY 15. 0645 PM TSTM WND GST 7 W COOPERSTOWN 47.44N 98.27W 07/08/2019 M60.00 MPH Griggs ND TRAINED SPOTTER 0645 PM TSTM WND GST 5 NE MCVILLE 47.82N 98.10W 07/08/2019 M78.00 MPH Nelson ND PUBLIC MEASURED BY HOME WEATHER STATION. 0655 PM TSTM WND DMG ANETA 47.68N 97.99W 07/08/2019 NELSON ND PUBLIC SOCIAL MEDIA PHOTO OF A LARGE PINE TREE SNAPPED AT THE TRUNK. TIME ESTIMATED FROM RADAR. 0712 PM TSTM WND GST 6 SE KEMPTON 47.76N 97.52W 07/08/2019 M53.00 MPH Grand Forks ND MESONET GUST TO 53 MPH. NORTH DAKOTA AGRICULTURAL WEATHER NETWORK. 0714 PM TSTM WND GST 5 NE HOPE 47.38N 97.64W 07/08/2019 M57.00 MPH Steele ND MESONET GUST TO 57 MPH. NORTH DAKOTA AGRICULTURAL WEATHER NETWORK. 0720 PM TSTM WND DMG 7 ENE HOPE 47.36N 97.58W 07/08/2019 Steele ND PUBLIC SEVERAL LARGE TREE BRANCHES BROKEN DOWN IF FARMS YARDS IN NORTHWEST EDENDALE TOWNSHIP. TIME ESTIMATED BASED ON RADAR AND NEARBY WIND SENSOR REPORTS. 0728 PM TSTM WND GST 2 WNW EMERADO 47.93N 97.40W 07/08/2019 M63.00 MPH Grand Forks ND MESONET PEAK WINDS MEASURED AT THE RWIS STATION ALONG U.S. HIGHWAY 2, NEAR MP 340. SEVERE WIND GUSTS CONTINUED THROUGH 736 PM CDT. 0729 PM TSTM WND DMG EMERADO 47.92N 97.36W 07/08/2019 GRAND FORKS ND NEWSPAPER ABOUT ONE THIRD OF THE SHINGLES AND A FEW PIECES OF PLYWOOD ROOFING WERE TORN OFF AN APARTMENT BUILDING. 0730 PM TSTM WND GST 6 WNW GRAND FORKS 47.95N 97.19W 07/08/2019 M60.00 MPH Grand Forks ND ASOS PEAK WINDS MEASSURED BY THE ASOS AT GRAND FORKS INTERNATIONAL AIRPORT /KGFK/. 0731 PM TSTM WND GST GRAND FORKS AFB 47.96N 97.38W 07/08/2019 M61.00 MPH GRAND FORKS ND AWOS GRAND FORKS AIR FORCE BASE. 0735 PM TSTM WND GST 2 SSE EAST GRAND FORKS 47.90N 97.00W 07/08/2019 E60.00 MPH Polk MN STORM CHASER 6 INCH DIAMETER TREES AND LIMBS DOWN 0739 PM TSTM WND GST 1 S GRAND FORKS 47.90N 97.07W 07/08/2019 E60.00 MPH Grand Forks ND BROADCAST MEDIA 5 INCH TO 6 INCH BRANCHES DOWN 0740 PM TSTM WND DMG GRAND FORKS 47.92N 97.07W 07/08/2019 GRAND FORKS ND PUBLIC SOCIAL MEDIA REPORT OF A LARGE TREE DOWN SOUTH OF DOWNTOWN. TIME ESTIMATED FROM RADAR. 0742 PM TSTM WND DMG 7 SSW GRAND FORKS 47.82N 97.13W 07/08/2019 Grand Forks ND BROADCAST MEDIA A SEMI-TRUCK AND TRAILER WERE BLOWN OFF OF I-29. TIME ESTIMATED BASED ON TRADAR AND NEARBY WIND REPORTS. 0743 PM TSTM WND GST 5 NNW GRAND FORKS 47.98N 97.11W 07/08/2019 M63.00 MPH Grand Forks ND MESONET RWIS SENSOR MEASUREMENT AT SITE ND019 0755 PM TSTM WND GST 2 W ELDRED 47.68N 96.82W 07/08/2019 E49.00 MPH Polk MN MESONET NORTH DAKOTA AGRICULTURAL WEATHER NETWORK. 0756 PM TSTM WND GST 1 N MALLORY 47.89N 96.91W 07/08/2019 M53.00 MPH Polk MN MESONET SUSTAINED WINDS AT 40 MPH, WITH PEAK WINDS TO 53 MPH. 0759 PM TSTM WND GST 1 SE HUNTER 47.18N 97.20W 07/08/2019 M75.00 MPH Cass ND MESONET PEAK WIND MEASURED AT A PERSONAL WEATHER STATION. 0800 PM TSTM WND DMG WARREN 48.20N 96.77W 07/08/2019 MARSHALL MN CO-OP OBSERVER EIGHT TO NINE INCH DIAMETER TREE TIPPED OVER IN TOWN. SEVERAL BRANCHES DOWN OFF TREES. TIME APPROXIMATE. 0804 PM TSTM WND DMG EUCLID 47.97N 96.64W 07/08/2019 Polk MN PUBLIC METAL ROOFING BLOWN OFF OF MACHINE SHED NEAR EUCLID VIA FACEBOOK PHOTO 0845 PM TSTM WND GST 2 NNW CROOKSTON 47.80N 96.62W 07/08/2019 M55.00 MPH Polk MN AWOS PEAK WIND MEASURED AT THE CROOKSTON AIRPORT /KCKN/. 0855 PM TSTM WND GST 3 S BROOKS 47.77N 96.00W 07/08/2019 M55.00 MPH Red Lake MN MESONET 0858 PM TSTM WND GST 1 NNE PRAIRIE ROSE 46.83N 96.83W 07/08/2019 E70.00 MPH Cass ND STORM CHASER 0924 PM TSTM WND DMG 3 S FARGO 46.83N 96.82W 07/08/2019 Cass ND BROADCAST MEDIA MEDIA REPORTED RECEIVING A PHOTO OF A 12 INCH DIAMETER TREE SNAPPED OFF IN SOUTH FARGO 0925 PM TSTM WND DMG GONVICK 47.74N 95.51W 07/08/2019 CLEARWATER MN PUBLIC SEVERAL LARGE BRANCHES BROKEN DOWN AROUND TOWN. TIME ESTIMATED BASED ON RADAR. 0932 PM TSTM WND GST 1 NW FOSSTON 47.59N 95.76W 07/08/2019 M60.00 MPH Polk MN ASOS FOSSTON ASOS REPORTED 60 MPH WIND 0933 PM TSTM WND DMG FOSSTON 47.58N 95.75W 07/08/2019 Polk MN PUBLIC A TREE BRANCH PIERCED THE SIDING AND INSIDE WALL OF A HOUSE. ANOTHER HOME HAD A WINDOW BLOWN IN. REPORTS AND PHOTOS POSTED VIA SOCIAL MEDIA. TIME ESTIMATED BASED ON RADAR AND NEARBY WIND SENSOR REPORTS. 1010 PM TSTM WND DMG SOLWAY 47.52N 95.13W 07/08/2019 Beltrami MN PUBLIC REPORT OF AT LEAST TWO TREES DOWN IN SOLWAY VIA SOCIAL MEDIA. 1028 PM TSTM WND DMG 7 NNW BEMIDJI 47.58N 94.94W 07/08/2019 Beltrami MN PUBLIC PERSONAL WEATHER STATION WAS BLOWN OVER. SEVERAL LARGE BRANCHES BROKEN DOWNN. TIME ESTIMATED BASED ON RADAR AND NEARBY WIND SENSOR REPORTS. 1034 PM TSTM WND DMG 2 SE FARGO 46.86N 96.79W 07/08/2019 Cass ND LAW ENFORCEMENT LARGE TREE BRANCHES, DOWNED BY STRONG WINDS, FELL ONTO POWER LINES NEAR 10TH ST SOUTH IN FARGO 1040 PM TSTM WND DMG ZERKEL 47.31N 95.38W 07/08/2019 CLEARWATER MN BROADCAST MEDIA SEVERAL LARGE TREE BRANCHES AND LIMBS BROKEN DOWN. REPORT POSTED VIA SOCIAL MEDIA. TIME ESTIMATED BASED ON RADAR. 1051 PM TSTM WND GST BARNESVILLE 46.65N 96.42W 07/08/2019 M63.00 MPH Clay MN PUBLIC PERSONAL WEATHER STATION. WINDS STARTED GUSTING ABOVE 58 MPH AT 1051PM AND CONTINUED UNTIL 1103PM. PEAKED AT 63 MPH AT 1058PM. 1107 PM TSTM WND GST KELLIHER 47.94N 94.45W 07/08/2019 M53.00 MPH BELTRAMI MN MESONET 1120 PM TSTM WND GST 3 WNW ROTHSAY 46.49N 96.35W 07/08/2019 M58.00 MPH Wilkin MN MESONET PEAK WINDS REPORTED FROM THE I-94 ROTHSAY RWIS 1125 PM TSTM WND DMG 1 ESE ROTHSAY 46.47N 96.27W 07/08/2019 Otter Tail MN CO-OP OBSERVER TREES OF 12 TO 18 INCHES DIAMETER BLOWN DOWN INTO THE STREET. TIME ESTIMATED BASED ON RADAR AND NEARBY WIND SENSOR REPORTS. 1135 PM TSTM WND DMG PELICAN RAPIDS 46.57N 96.09W 07/08/2019 Otter Tail MN BROADCAST MEDIA PUBLIC REPORT VIA SOCIAL MEDIA OF 3 TREES BROKEN DOWN AT ONE HOMESITE. TIME BASED ON RADAR AND NEARBY WIND SENSOR REPORTS. 1153 PM TSTM WND DMG OTTERTAIL 46.43N 95.56W 07/08/2019 OTTER TAIL MN PUBLIC A GAZEBO WAS BLOWN OVER AND A FEW SHINGLES BLOWN OFF OF A HOUSE. TIME ESTIMATED BASED ON RADAR AND NEARBY WIND SENSOR REPORTS. 1154 PM TSTM WND DMG 3 E VERGAS 46.66N 95.74W 07/08/2019 Otter Tail MN MESONET NUMEROUS LARGE BRANCHES BROKEN DOWN. NEARBY PERSONALL WEATHER STATION RECORDED SUSTAINED WINDS AT 40 MPH WITH GUSTS OF 50 MPH OR GREATER FOR SEVERAL MINUTES. 1210 AM TSTM WND DMG BATTLE LAKE 46.29N 95.72W 07/09/2019 OTTER TAIL MN BROADCAST MEDIA A PINE TREE SNAPPED AND NUMEROUS LARGE BRANCHES BROKEN DOWN AROUND TOWN. 0752 PM TSTM WND DMG TABOR 48.08N 96.86W 07/08/2019 POLK MN PUBLIC ROOFING MATERIAL BLOWN OFF A GARAGE. A FEW LARGE TREES DOWN.
Photos & Video:
Strong thunderstorm wind gusts damaged trees and structures across parts of the region.
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| Photo courtesy of Lucas Ping of Aneta, ND | Photo courtesy of Karen Thacker of Grand Forks, ND | Photo courtesy of Cindy Johnson of East Grand Forks, MN |
Radar:
Radar Loop from 4:00 p.m. to 10:00 p.m. on July 8th
Radar Loop from 4:00 p.m. on July 8th to 10:00 p.m. on July 9th
Rainfall Reports:
Heavy rain led to urban flash flooding in the Fargo-Moorhead-Dilworth area where 2-3 inches of rain fell in within two hour period. Flooded roads were reported in Fargo near NDSU, in north Moorhead, along 25th Street South, and several other locations. Law enforcement reports that sewers backed up in Dilworth and a few dozen cars were stalled or stranded on roads due to high flood waters covering the streets in parts of the Fargo-Moorhead metro.
FLASH FLOOD REPORTS FOR MONDAY, JULY 8, 2019
1106 PM FLASH FLOOD 2 NNE FARGO 46.90N 96.80W 07/08/2019 Cass ND PUBLIC IMPASSABLE ROADS NEAR NDSU AT INTERSECTION OF 19TH AVE N AND UNIVERSITY DRIVE VIA TWITTER REPORT
1230 AM FLASH FLOOD 3 ENE FARGO 46.89N 96.76W 07/09/2019 Clay MN PUBLIC PUBLIC REPORTED ROADWAY FLOODED IN NORTH MOORHEAD ON 15TH AVE N VIA FACEBOOK 24-HOUR RAIN REPORTS FOR MONDAY, JULY 8, 2019 LOCATION PRECIP (INCHES) MINNESOTA ...BECKER COUNTY... DETROIT LAKES 1.69 ...BELTRAMI COUNTY... BEMIDJI 1.07 SAUM 1.37 RED LAKE 1.75 ...BECKER COUNTY... 5 NW OSAGE 1.48 5 N DETROIT LAKES 1.55 2 N PONSFORD 1.66 7 ESE ULEN 2.66 ...BELTRAMI COUNTY... 8 N BEMIDJI 1.15 4 NE WASKISH 1.80 6 N PUPOSKY 3.00 ...CLAY COUNTY... HAWLEY 3.00 DOWNER 3.20 ...CLEARWATER COUNTY... BAGLEY 1.54 ...CLAY COUNTY... 4 SE ROLLAG 1.17 5 NE BARNESVILLE 1.78 2 NE SABIN 2.09 2 N GLYNDON 2.88 3 ENE FARGO 3.03 2 NW GLYNDON 3.08 1 E GEORGETOWN 3.60 ...KITTSON COUNTY... 4 SE LAKE BRONSON 1.07 KARLSTAD 1.14 6 W KENNEDY 1.24 2 NE NORTHCOTE 1.74 LANCASTER 2.72 CARIBOU 3.36 HALLOCK 4.21 ...LAKE OF THE WOODS COUNTY... 6 N WILLIAMS 1.44 12 S BAUDETTE 2.52 ...MARSHALL COUNTY... ARGYLE 1.41 ...MAHNOMEN COUNTY... 1 SE MAHNOMEN 1.83 ...MARSHALL COUNTY... 8 NW WARREN 1.14 15 E HOLT 1.92 ...NORMAN COUNTY... HALSTAD 1.65 ...Norman COUNTY... 3 S WAUKON 1.93 2 S ADA 2.01 8 NE FELTON 2.19 1 N ADA 2.30 6 E PERLEY 2.65 ...OTTER TAIL COUNTY... 3 W FERGUS FALLS 1.14 3 WNW URBANK 2.10 ...POLK COUNTY... FISHER 1.10 FERTILE 1.48 ERSKINE 2.60 ...PENNINGTON COUNTY... 3 WSW MAVIE 1.77 3 S THIEF RIVER FALLS 2.30 3 E THIEF RIVER FALLS 3.00 ...POLK COUNTY... 5 ENE EAST GRAND FORKS 0.80 2 W ELDRED 1.16 6 SW WARREN 1.23 2 SW MENTOR 2.03 9 W MENTOR 2.27 ...RED LAKE COUNTY... PLUMMER 2.60 ...ROSEAU COUNTY... ROSEAU 1.75 GREENBUSH 1.86 ...RED LAKE COUNTY... 3 WNW BROOKS 2.06 ...ROSEAU COUNTY... 7 W GREENBUSH 1.25 4 NE FOX 1.49 11 S ROSEAU 1.50 4 S WARROAD 1.75 2 SSE WANNASKA 3.50 ...WILKIN COUNTY... 3 E BRECKENRIDGE 1.31 LOCATION PRECIP (INCHES) NORTH DAKOTA ...BARNES COUNTY... 2 E DAZEY 1.12 4 W FINGAL 1.53 ...CASS COUNTY... ARTHUR 1.80 CHAFFEE 1.94 FARGO 1.96 HARWOOD 3.22 ...CASS COUNTY... 4 SSW GALESBURG 1.10 1 N AMENIA 1.48 5 N LEONARD 1.91 1 S FARGO 2.14 3 N FARGO 2.20 5 NW PROSPER 2.30 ...CAVALIER COUNTY... 1 E LANGDON 1.16 ...GRAND FORKS COUNTY... GRAND FORKS 0.91 3 S GRAND FORKS 1.13 ...RAMSEY COUNTY... 6 SE PENN 1.95 ...RANSOM COUNTY... 2 W LISBON 1.33 ...RICHLAND COUNTY... 6 NNW WAHPETON 1.09 3 E MCLEOD 1.15 6 WNW BARRIE 1.32 ...STEELE COUNTY... 5 NE HOPE 1.02 ...TOWNER COUNTY... 1 S EGELAND 3.00 ...TRAILL COUNTY... 7 SE HILLSBORO 2.00 2 E MAYVILLE 2.52 ...WALSH COUNTY... 3 W OSLO 1.04
Environment:
An upper level jet at 300 mb (not shown) was located from central North Dakota into southern Manitoba with the right entrance region over eastern North Dakota. Stronger winds were also noted at 500 mb. A low level theta-e ridge preceded a cold front over northeast North Dakota where 850 mb dew points were in the 60s.
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| Figure 1: 500 mb Heights | Figure 2: 700 mb Heights | Figure 3: 850 mb Heights |
A cold front moved into northeast North Dakota with good low level moisture convergence. Mixed-layer CAPE values ranged from 2500 to 3500 J/kg (or larger) in the low level theta-e ridge. Downdraft CAPE values ranged from 1000 to 1200 J/kg east of the surface boundary with strong winds expected from the storms.
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| Figure 4: Deep Moisture Convergence | Figure 5: Mixed-Layer CAPE | Figure 6: Downdraft CAPE |
Twenty-five to 30 knots of prefrontal wind at 925 mb provided good low level transport north towards the frontal boundary. Bulk shear was fairly low ahead of the frontal boundary which would aid in the gusty winds with a linear storm mode anticipated. Locally heavy rainfall would also be expected with precipitable water values around 1.8 inches (not shown).
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| Figure 7: 925 mb Moisture Transport | Figure 8: 0-6 km Bulk Shear |
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| Figure 9: Warnings Issued by NWS Grand Forks | Figure 10: Day 1 13z Storm Prediction Center Outlook |
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