Grand Forks, ND

Weather Forecast Office

Event Summary for July 11, 2017

Overview

Several supercell thunderstorms spawned tornadoes on this day across northeast ND and portions of northwest MN. These supercell storms produced at least 11 distinct tornadoes, along with numerous large hail and damaging downburst wind events. The largest and strongest of these supercells tracked southeastward for over 110 miles from its origin just west of Larimore ND, past Hillsboro ND and Halstad MN, and continued well east of Detroit Lakes MN, producing 4 of the 11 identified tornadoes, three of which were also the strongest and longest tracking (see descriptions below).

Both a ground survey and an aerial survey were conducted over this long storm track. These surveys showed evidence of the tornadoes forming and generally tracking southeastward, but occasionally exhibiting a slight curl to the ESE which was followed by a sharp plunge towards the SSE, usually accompanied at this point by an extreme Rear-Flank Downdraft (RFD) wind area, wrapping around to the west and south of the main tornado track. A good example of this would be Tornado Number 8, which radar imagery and corresponding ground swirl tracks showed as passing well to the northeast of Hillsboro ND, with EF2 tornadic scale winds of from 115-135 mph, while extreme downburst winds of from 80-100 mph raked across the community of Hillsboro itself.

Tornado
Radar
Storm Reports
Environment
Additional

Tornadoes:

Tornado #1 - 4 E Rocklake, ND
Towner County

Date	11 July 2017
Time (Local)	5:16 pm - 5:20 pm
EF Rating	EF-0
Est. Peak Winds	70 mph
Path Length	2.2 miles
Max Width	150 yards
Injuries/Deaths	None
Summary: The funnel which preceded this tornado was viewed by multiple storm spotters. Photographs and reports show that this tornado tracked ESE for about two miles over mainly open rangeland and lifted by 5:20 pm around 6 ESE Rocklake.

Track Map

Tornado #2 - 2 SSW Veseleyville, ND
Walsh County

Date	11 July 2017
Time (Local)	5:39 pm - 5:43 pm
EF Rating	EF-1
Est. Peak Winds	95 mph
Path Length	2 miles
Max Width	150 yards
Injuries/Deaths	None
Summary: This was viewed as a partially rain-wrapped tornado tracking between Pisek and Voss. A damage survey found freshly snapped tree limbs and snapped poplar trees in shelter belts. Roof trim was damaged on a house at one farmstead.

Track Map

Tornado #3 - 5 E Clyde, ND
Cavalier County

Date	11 July 2017
Time (Local)	5:48 pm - 5:50 pm
EF Rating	EF-0
Est. Peak Winds	70 mph
Path Length	0.5 miles
Max Width	100 yards
Injuries/Deaths	None
Summary: Brief touchdown noted by observer located near the corner of CR5 and CR20. The tornado likely tracked over open country for less than one-half mile and lifted by 5:50 pm.

Track Map

Tornado #4 - 3 ENE Inkster, ND
Grand Forks County

Date	11 July 2017
Time (Local)	5:51 pm - 5:53 pm
EF Rating	EF-0
Est. Peak Winds	75 mph
Path Length	1 miles
Max Width	100 yards
Injuries/Deaths	None
Summary: A persistent funnel with intermittent touchdowns was observed passing northeast of Inkster. A damage survey found freshly broken tree branches and limbs at one farmstead and in nearby shelter belts.

Track Map

Tornado #5 - 5 NNW Northwood, ND
Grand Forks County

Date	11 July 2017
Time (Local)	6:25 pm - 6:42 pm
EF Rating	EF-1
Est. Peak Winds	90 mph
Path Length	4.5 miles
Max Width	150 yards
Injuries/Deaths	None
Summary: This is the first of four tornadoes from one long tracking supercell storm. This partially rain wrapped tornado tracked intermittently to the southeast for nearly five miles to around 3 ENE Northwood by 6:42 pm. The tornado broke down large branches and snapped a few tree trunks in shelter belts along its path.

Track Map

Tornado #6 - 5 NW Adams, ND
Walsh County

Date	11 July 2017
Time (Local)	6:30 pm - 6:46 pm
EF Rating	EF-1
Est. Peak Winds	105 mph
Path Length	7 miles
Max Width	150 yards
Injuries/Deaths	None
Summary: This rope tornado tracked for roughly seven miles to the east-southeast and eventually produced a substantial dust swirl before it ended about 2 ENE Adams by 6:46 pm. It was viewed and photographed from multiple locations. Though it remained over largely open country, it did snap a few hardwood tree trunks at a couple of locations.

Track Map

Tornado #7 - 4 NNW Manvel, ND
Grand Forks County

Date	11 July 2017
Time (Local)	6:50 pm - 6:56 pm
EF Rating	EF-0
Est. Peak Winds	75 mph
Path Length	1.7 miles
Max Width	150 yards
Injuries/Deaths	None
Summary: This tornado was observed and reported by spotters located near Manvel and along Highway 81 and CR1 about six miles northwest of Manvel. The tornado tracked to the east for nearly two miles and crossed I-29 just south of Exit 157, before lifting around 3.5 ENE of Manvel by 6:56 pm. The tornado broke down large tree branches at multiple shelter belts and groves along its path.

Track Map

Tornado #8 - 7 E Hatton/Hillsboro, ND
Traill County

Date	11 July 2017
Time (Local)	6:58 pm - 7:49 pm
EF Rating	EF-2
Est. Peak Winds	135 mph
Path Length	23 miles
Max Width	1200 yards
Injuries/Deaths	None
Summary: This is the second of four tornadoes from one long tracking supercell storm. This multi-vortex tornado was wrapped in rain and hail for much of its path as it tracked primarily to the southeast for over 22 miles. It crossed I-29 just north of the Taft Elevators then dove south-southeastward to a point roughly 2.5 ENE Hillsboro where it curled to the northeast, ending about 4.5 ENE Hillsboro by 7:49 pm. The tornado snapped trees and destroyed several farm buildings along its path.

Track Map

Tornado #9 - 6 SSW Alvarado-Tabor, MN
Polk County

Date	11 July 2017
Time (Local)	7:07 pm - 7:30 pm
EF Rating	EF-1
Est. Peak Winds	95 mph
Path Length	10 miles
Max Width	250 yards
Injuries/Deaths	None
Summary: This tornado tracked intermittently for nearly 10 miles across northern Northland and Tabor townships, before lifting around 3 E Tabor by 7:30 pm. The tornado snapped or uprooted a few spruce trees and broke down numerous large branches in shelter belts along its path. At one farmstead east of Tabor, it tore steel panels off of a shed roof and snapped large tree limbs.

Track Map

Tornado #10 - 4 ESE Hillsboro, ND to Halstad, MN
Trail County (ND) to Norman County (MN)

Date	11 July 2017
Time (Local)	7:48 pm - 8:11 pm
EF Rating	EF-2
Est. Peak Winds	130 mph
Path Length	11 miles
Max Width	600 yards
Injuries/Deaths	None
Summary: This is the third of four tornadoes from one long tracking supercell storm. This tornado developed from the main mesocyclone as its predecessor roped out about 2 miles to the northeast. It tracked east-southeast for roughly six miles before it crossed the Red River about 1 W Halstad around 8:00 pm. It then continued to track east-southeast for another five miles to around 4 ESE Halstad by 8:11 pm. This tornado snapped H-pole power poles, crushed steel grain bins, snapped numerous oak and ash trees, and toppled a barn along its path.

Track Map

Tornado #11 - 3N Borup to Ulen, MN
Norman and Clay Counties

Date	11 July 2017
Time (Local)	8:42 pm - 9:06 pm
EF Rating	EF-2
Est. Peak Winds	125 mph
Path Length	13 miles
Max Width	500 yards
Injuries/Deaths	None
Summary: This is the fourth of four tornadoes from one long tracking supercell storm. This tornado tracked to the southeast for roughly 13 miles before it curled out around 2 N Ulen by 9:06 pm. This tornado collapsed at least one shed, snapped numerous trees, and tossed large round hay bales across a sugar beet field. It also snapped at least a half dozen wooden power poles.

Track Map

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

Radar:


Radar Loop 4pm-10pm	Radar Loop 7pm-1am	Base Reflectivity Tornadic Storm near Hillsboro ND	Storm Relative Velocity Tornadic Storm near Hillsboro ND

Storm Reports

Link to Summary of Storm Reports

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0455 PM     FUNNEL CLOUD     AMOURDALE               48.87N 99.37W
07/11/2017                   TOWNER             ND   PUBLIC

            FACEBOOK PHOTO OF POSSIBLE TORNADO SOUTH OF HANSBORO ND

0510 PM     FUNNEL CLOUD     1 NE ROCKLAKE           48.80N 99.23W
07/11/2017                   TOWNER             ND   LAW ENFORCEMENT

            FUNNEL CLOUD BEING MONITORED BY DEPUTY RELAYED VIA 911
            CALL CENTER THROUGH NAWAS

0512 PM     FUNNEL CLOUD     2 E ROCKLAKE            48.79N 99.20W
07/11/2017                   TOWNER             ND   TRAINED SPOTTER

            POSSIBLE TORNADO VIEWED FROM NEAR CALVIN.

0516 PM     TORNADO          4 E ROCKLAKE            48.79N 99.16W
07/11/2017  F0               TOWNER             ND   PUBLIC

            THE FUNNEL WHICH PRECEDED THIS TORNADO WAS VIEWED BY
            MULTIPLE STORM SPOTTERS. PHOTOGRAPHS AND REPORTS SHOW
            THAT THIS TORNADO TRACKED ESE FOR ABOUT 2 MILES OVER
            MAINLY OPENED RANGELAND AND LIFTED BY 520 PM CDT AROUN 6
            ESE ROCKLAKE. PEAK WINDS ESTIMATED TO 70 MPH. MAXIMUM
            WIDTH ESTIMATED TO 150 YARDS.

0535 PM     HAIL             4 NNW VOSS              48.35N 97.49W
07/11/2017  E1.50 INCH       WALSH              ND   PUBLIC

            LARGE HAIL FELL FOR A GOOD 10 MINUTES ACROSS NORTHWEST
            WALSH CENTER TOWNSHIP. BEAN FIELDS STRIPPED.

0536 PM     HAIL             2 NNE CLYDE             48.80N 98.88W
07/11/2017  E1.75 INCH       CAVALIER           ND   PUBLIC

0539 PM     TORNADO          2 SSW VESELEYVILLE      48.30N 97.57W
07/11/2017  F1               WALSH              ND   STORM CHASER

            PARTIALLY RAIN WRAPPED TORNADO BETWEEN PISEK AND VOSS.
            DAMAGE SURVEY FOUND LARGE BRANCHES DOWN AND A FEW FRESHLY
            SNAPPED POPLAR TREES IN SHELTER BELTS ALONG A NEARLY 2
            MILE TRACK TO AROUND 4W VOSS BY 543. TRIM WAS DAMAGED ON
            A HOUSE AT ONE FARMSTEAD. PEAK WINDS ESTIMATED TO 95 MPH.
            MAXIMUM WIDTH TO 150 YARDS.

0544 PM     FUNNEL CLOUD     3 NNW INKSTER             48.19N 97.60W
07/11/2017                   GRAND FORKS        ND   TRAINED SPOTTER

            RAPIDLY PRODUCED WALL CLOUD, THEN FUNNEL DEVELOPED. COULD
            NOT DETERMINE WHETHER FUNNEL WAS REACHING THE GROUND

0548 PM     TORNADO          5 E CLYDE               48.77N 98.79W
07/11/2017  F0               CAVALIER           ND   PUBLIC

            BRIEF TOUCHDOWN NOTED BY OBSERVER NEAR THE CORNER OF CR5
            AND CR20. TORNADO LIKELY TRACKED OVER OPENED COUNTRY FOR
            LESS THAN A HALF MILE AND LIFTED BY 550 PM CDT. MAXIMUM
            WINDS ESTIMATED TO 70 MPH. MAXIMUM WIDTH TO 100 YARDS.
            TIME ESTIMATED BASED ON RADAR.

0550 PM     HAIL             10 E CLYDE              48.77N 98.68W
07/11/2017  E1.75 INCH       CAVALIER           ND   PUBLIC

            LARGE HAIL FELL FOR NEARLY 10 MINUTES. LARGE BRANCHES
            WERE BROKEN DOWN IN SHELTER BELTS AROUND WESTERN MOSCOW
            TOWNSHIP.

0551 PM     TORNADO          3 ENE INKSTER           48.17N 97.58W
07/11/2017  F0               GRAND FORKS        ND   NWS STORM SURVEY

            A PERSISTENT FUNNEL CLOUD WITH INTERMITTENT TOUCHDOWNS
            WAS OBSERVED PASSING NORTHEAST OF INKSTER. DAMAGE SURVEY
            FOUND LARGE, FRESHLY BROKEN TREE BRANCHES AND LIMBS AT
            ONE FARMSTEAD AND IN SHELTER BELTS ALONG A ROUGHLY MILE
            LONG PATH. THE PATH ENDING AROUND 4ENE INSKSTER BY 553 PM
            CDT. PEAK WINDS ESTIMATED TO 75 MPH. MAXIMUM WIDTH TO 100
            YARDS.

0600 PM     HAIL             1 S FOREST RIVER        48.20N 97.47W
07/11/2017  E1.00 INCH       WALSH              ND   TRAINED SPOTTER

            QUARTER SIZED HAIL VIA HAM RADIO

0603 PM     HAIL             7 W LARIMORE            47.91N 97.78W
07/11/2017  E1.75 INCH       GRAND FORKS        ND   PUBLIC

0608 PM     FUNNEL CLOUD     3 SW LARIMORE           47.88N 97.67W
07/11/2017                   GRAND FORKS        ND   STORM CHASER

            WALL CLOUD REPORTED AROUND 558 PM CDT ABOUT 6W OF
            LARIMORE. SUBSEQUENT FUNNEL WAS REPORTED AND PHOTO POSTED
            TO SOCIAL MEDIA.

0612 PM     TSTM WND DMG     N LARIMORE              47.91N 97.63W
07/11/2017                   GRAND FORKS        ND   NWS STORM SURVEY

            NUMEROUS LARGE TREE BRANCHES AND LIMBS BROKEN DOWN IN
            SHELTER BELTS ACROSS NORTHEAST ELM GROVE TOWNSHIP.

0615 PM     HAIL             LARIMORE                47.91N 97.63W
07/11/2017  E1.00 INCH       GRAND FORKS        ND   STORM CHASER

0618 PM     HAIL             5 N BOWESMONT           48.76N 97.18W
07/11/2017  E2.50 INCH       PEMBINA            ND   STORM CHASER

            LARGE HAIL COVERED THE INTERSTATE NEAR MP200.

0625 PM     TORNADO          5 NNW NORTHWOOD         47.80N 97.61W
07/11/2017  F1               GRAND FORKS        ND   NWS STORM SURVEY

            THIS PARTIALLY RAIN WRAPPED TORNADO TRACKED
            INTERMITTENTLY TO THE SOUTHEAST FOR NEARLY 5 MILES TO
            AROUND 3 ENE OF NORTHWOOD BY 642 PM CDT. THE TORNADO
            BROKE DOWN LARGE BRANCHES AND SNAPPED A FEW TREE TRUNKS
            IN SHELTER BELTS ALONG IT PATH. MAXIMUM WIDTH ESTIMATED
            TO 150 YARDS. PEAK WINDS ESTIMATED TO 90 MPH.

0629 PM     FUNNEL CLOUD     2 ENE FAIRDALE          48.50N 98.19W
07/11/2017                   WALSH              ND   TRAINED SPOTTER

            LARGE CONE SHAPED FUNNEL WAS REPORTED NEAR FAIRDALE.

0630 PM     TORNADO          5 NW ADAMS              48.47N 98.15W
07/11/2017  F1               WALSH              ND   STORM CHASER

            THIS ROPE TORNADO TRACKED FOR ROUGHLY 7 MILES TO THE EAST
            SOUTHEAST AND EVENTUALLY PRODUCED A SUBSTANTIAL DUST
            SWIRL BEFORE IT ENDED ABOUT 2 ENE OF ADAMS BY 646 PM CDT.
            IT WAS VIEWED AND PHOTOGRAPHED FROM MULTIPLE LOCATIONS.
            THOUGH IT REMAINED OVER LARGELY OPENED COUNTRY IT DID
            SNAPPED A FEW HARDWOOD TREE TRUNKS AT A COUPLE OF
            LOCATIONS. MAXIMUM WIDTH TO 150 YARDS. PEAK WINDS
            ESTIMATED TO 105 MPH.

0632 PM     HAIL             1 W NORTHCOTE           48.85N 97.02W
07/11/2017  E1.00 INCH       KITTSON            MN   LAW ENFORCEMENT

            DIME TO QUARTER SIZED HAIL FELL WEST OF NORTHCOTE

0640 PM     HAIL             1 NW ORLEANS            48.94N 96.95W
07/11/2017  E1.75 INCH       KITTSON            MN   PUBLIC

            HAIL SHREDDED CORN AND BEAN FIELDS

0641 PM     HAIL             6 NW MANVEL             48.13N 97.27W
07/11/2017  E1.25 INCH       GRAND FORKS        ND   TRAINED SPOTTER

0642 PM     HAIL             7 ENE NORTHWOOD         47.77N 97.43W
07/11/2017  E1.75 INCH       GRAND FORKS        ND   NWS STORM SURVEY

            LARGE HAIL AND STRONG WINDS DAMAGED CROPS ACROSS SOUTHERN
            PLEASANT VIEW TOWNSHIP.

0645 PM     HAIL             2 NE ORLEANS            48.95N 96.91W
07/11/2017  E1.50 INCH       KITTSON            MN   PUBLIC

            HAIL FOR 10 MINUTES WITH VARYING SIZES UP TO THE SIZE OF
            PING PONG BALLS

0650 PM     TORNADO          4 NNW MANVEL            48.13N 97.21W
07/11/2017  F0               GRAND FORKS        ND   TRAINED SPOTTER

            THIS TORNADO WAS OBSERVED AND REPORTED BY SPOTTERS
            LOCATED NEAR MANVEL AND ALONG HWY 81 AND CR1 ABOUT 6
            MILES NORTHWEST OF MANVEL. THE TORNADO TRACKED TO THE
            EAST FOR NEARLY 2 MILES AND CROSSED INTERSTATE 29 JUST
            SOUTH OF EXIT 157...BEFORE LIFTING AROUND 3.5 ENE OF
            MANVEL BY 656 PM CDT. THE TORNADO BROKE DOWN LARGE TREE
            BRANCHES AT MULTIPLE SHELTER BELTS AND GROVES ALONG ITS
            PATH. PEAK WINDS ESTIMATED TO 75 MPH. MAXIMUM WIDTH TO
            150 YARDS.

0653 PM     HAIL             2 W THOMPSON            47.78N 97.15W
07/11/2017  E0.50 INCH       GRAND FORKS        ND   911 CALL CENTER

            MARBLE SIZED HAIL REPORTED IN RURAL THOMPSON

0658 PM     TORNADO          7 E HATTON              47.64N 97.31W
07/11/2017  F2               TRAILL             ND   NWS STORM SURVEY

            THIS MULTI-VORTEX TORNADO WAS WRAPPED IN RAIN AND HAIL
            FOR MUCH OF ITS PATH AS IT TRACKED PRIMARILY TO THE
            SOUTHEAST FOR OVER 22 MILES. IT CROSSED INTERSTATE 29
            JUST NORTH OF THE TAFT ELEVATORS THEN DOVE SOUTH
            SOUTHEASTWARD TO A POINT ROUGHLY 2.5 ENE OF HILLSBORO
            WHERE IT CURLED TO THE NORTHEAST...ENDING ABOUT 4.5 ENE
            OF HILLSBORO BY 749 PM CDT. THE TORNADO SNAPPED TREES AND
            DESTROYED SEVERAL FARM BUILDINGS ALONG ITS PATH. MAXIMUM
            WIDTH ESTIMATED TO 1200 YARDS. PEAK WINDS ESTIMATED TO
            135 MPH.

0659 PM     HAIL             1 NE HATTON             47.65N 97.44W
07/11/2017  E1.75 INCH       TRAILL             ND   TRAINED SPOTTER

            QUARTER TO GOLF BALL SIZED HAIL NORTHEAST OF HATTON

0700 PM     HAIL             1 N PARK RIVER          48.41N 97.74W
07/11/2017  E1.50 INCH       WALSH              ND   TRAINED SPOTTER

0701 PM     HAIL             HOLMES                  47.72N 97.30W
07/11/2017  E1.00 INCH       GRAND FORKS        ND   TRAINED SPOTTER

0707 PM     TORNADO          6 SSW ALVARADO          48.11N 97.05W
07/11/2017  F1               POLK               MN   NWS STORM SURVEY

            THIS TORNADO TRACKED INTERMITTENTLY FOR NEARLY 10 MILES
            ACROSS NORTHERN NORTHLAND AND TABOR TOWNSHIPS... AND
            LIFTED AROUND 3 MILES EAST OF TABOR BY 730 PM CDT. THE
            TORNADO SNAPPED OR UPROOTED A FEW SPRUCE TREES AND BROKE
            DOWN NUMEROUS LARGE BRANCHES IN SHELTER BELTS ALONG ITS
            PATH. AT ONE FARMSTEAD EAST OF TABOR IT TORE STEEL PANELS
            OFF OFF OF SHED ROOF AND SNAPPED LARGE TREE LIMBS.
            MAXIMUM WIDTH ESTIMATED TO 250 YARDS. PEAK WINDS
            ESTIMATED TO 95 MPH.

0720 PM     HAIL             7 ESE PARK RIVER        48.35N 97.60W
07/11/2017  E1.00 INCH       WALSH              ND   PUBLIC

0723 PM     HAIL             2 N TABOR               48.11N 96.86W
07/11/2017  E1.75 INCH       POLK               MN   NWS STORM SURVEY

            HAIL UP TO GOLF BALL SIZED FELL ACROSS NORTHWEST TOBOR
            TOWNSHIP.

0735 PM     HAIL             2 NNE LEROY             48.95N 97.74W
07/11/2017  E1.00 INCH       PEMBINA            ND   PUBLIC



0748 PM     TORNADO          4 ESE HILLSBORO         47.38N 96.98W
07/11/2017  F2               TRAILL             ND   NWS STORM SURVEY

            THIS TORNADO DEVELOPED FROM THE MAIN MESOCYCLONE AS ITS
            PREDECESSOR ROPED OUT. IT TRACKED ESE FOR ROUGHLY 6 MILES
            BEFORE IT CROSSED THE RED RIVER ABOUT 1W OF HALSTAD MN
            AROUND 8 PM CDT. IT THEN CONTINUED TO TRACK ESE FOR
            ANOTHER 5 MILES TO AROUND 4 ESE OF HALSTAD BY 811 PM CDT.
            THIS TORNADO SNAPPED H-POLE POWER POLES, CRUSHED STEEL
            GRAIN BINS, SNAPPED NUMEROUS OAK AND ASH TREES, AND
            TOPPLED A BARN ALONG ITS PATH. MAXIMUM WIDTH TO 600
            YARDS. PEAK WINDS ESTIMATED TO 130 MPH.

0750 PM     HAIL             2 W CALEDONIA           47.46N 96.93W
07/11/2017  E1.75 INCH       TRAILL             ND   PUBLIC

            LARGE HAIL AND STRONG WINDS LASTED FOR SEVERAL MINUTES
            ACROSS EASTERN CALEDONIA TOWNSHIP.

0754 PM     FUNNEL CLOUD     4 NE EUCLID             48.01N 96.58W
07/11/2017                   POLK               MN   TRAINED SPOTTER

            PERSISTENT WALL CLOUD WITH POSSIBLE FUNNEL.

0756 PM     HAIL             1 S CUMMINGS            47.50N 97.08W
07/11/2017  E0.75 INCH       TRAILL             ND   TRAINED SPOTTER

0800 PM     TSTM WND GST     7 SE HILLSBORO          47.33N 96.96W
07/11/2017  M79.00 MPH       TRAILL             ND   MESONET

            NDAWN PEAK GUST

0803 PM     HAIL             1 NNW HILLSBORO         47.42N 97.07W
07/11/2017  E1.75 INCH       TRAILL             ND   STORM CHASER

0805 PM     TSTM WND DMG     HALSTAD                 47.35N 96.82W
07/11/2017                   NORMAN             MN   TRAINED SPOTTER

            SHED DESTROYED AND NUMEROUS TREES UPROOTED.

0815 PM     HAIL             2 NE DOROTHY            47.95N 96.42W
07/11/2017  E1.00 INCH       RED LAKE           MN   PUBLIC

0825 PM     HAIL             5 W ST. HILAIRE         48.01N 96.32W
07/11/2017  M1.00 INCH       PENNINGTON         MN   PUBLIC

            REPORT WITH PICTURE VIA FACEBOOK

0842 PM     TORNADO          3 N BORUP               47.22N 96.51W
07/11/2017  F2               NORMAN             MN   NWS STORM SURVEY

            THIS TORNADO TRACKED TO THE SOUTHEAST FOR ROUGHLY 13
            MILES... BEFORE IT CURLED OUT AROUND 2 MILES NORTH OF
            ULEN BY 906 PM CDT. THIS TORNADO COLLASPSED AT LEAST ONE
            SHED, SNAPPED NUMEROUS TREES, AND TOSSED LARGE ROUND HAY
            BALES ACROSS A SUGAR BEET FIELD. IT ALSO SNAPPED AT LEAST
            A HALF DOZEN WOODEN POWER POLES. MAXIMUM WIDTH ESTIMATED
            TO 500 YARDS. PEAK WINDS ESTIMATED TO 125 MPH.

0845 PM     TSTM WND DMG     BORUP                   47.18N 96.51W
07/11/2017                   NORMAN             MN   PUBLIC

            THE ROOF WAS BLOWN OFF A POLE SHED AND LARGE TREES WERE
            UPROOTED. TIME ESTIMATED FROM RADAR. REPORT VIA SOCIAL
            MEDIA.

0847 PM     HAIL             2 N PERLEY              47.21N 96.80W
07/11/2017  E1.00 INCH       NORMAN             MN   AMATEUR RADIO

            DIME TO QUARTER SIZED HAIL

0848 PM     TSTM WND GST     1 W FELTON              47.08N 96.53W
07/11/2017  E70.00 MPH       CLAY               MN   EMERGENCY MNGR

            EMERGENCY MANAGER FROM CLAY COUNTY REPORTS SHELF CLOUD
            APPROACHING AND 60-70 MPH WINDS

0910 PM     TSTM WND DMG     1 W ULEN                47.08N 96.28W
07/11/2017                   CLAY               MN   EMERGENCY MNGR

            EMERGENCY MGR REPORTED TREES DOWN APPROXIMATELY 1W ULEN.
            WINDS ESTIMATED AT 70-80 MILES PER HOUR. TREES DOWNED
            WERE APPROXIMATELY 12-18 INCHES IN DIAMETER. POWERLINES
            WERE ALSO REPORTED DOWN AND LOCALIZED STREET FLOODING WAS
            OCCURING IN ULEN.

0924 PM     TSTM WND GST     7 ESE ULEN              47.04N 96.12W
07/11/2017  M54.00 MPH       BECKER             MN   MESONET

            PEAK WINDS MEASURED AT AN NDAWN STATION.

0925 PM     HAIL             7 SW WENDELL            45.96N 96.20W
07/11/2017  E1.25 INCH       GRANT              MN   PUBLIC

0926 PM     TSTM WND DMG     HITTERDAL               46.98N 96.26W
07/11/2017                   CLAY               MN   EMERGENCY MNGR

            NUMEROUS LARGE TREE BRANCHES AND LIMBS BROKEN DOWN AROUND
            TOWN. POWER LINES DOWN.

0935 PM     TSTM WND GST     CALLAWAY                46.98N 95.91W
07/11/2017  E80.00 MPH       BECKER             MN   PUBLIC

            LARGE TREES BROKEN DOWN AROUND TOWN. POWER OUT. WINDS
            ESTIMATED TO 80 MPH.

0939 PM     HAIL             CALLAWAY                46.98N 95.91W
07/11/2017  E2.00 INCH       BECKER             MN   PUBLIC

            VERY LARGE HAIL FELL FOR SEVERAL MINUTES.

0940 PM     HAIL             ELBOW LAKE              45.99N 95.98W
07/11/2017  E1.00 INCH       GRANT              MN   TRAINED SPOTTER

0945 PM     HAIL             FERGUS FALLS            46.28N 96.07W
07/11/2017  M2.00 INCH       OTTER TAIL         MN   PUBLIC

            HAIL RANGED IN SIZE FROM 1.50 TO 2 INCHES. HAILED UNTIL
            950 PM.

0946 PM     HAIL             FERGUS FALLS            46.28N 96.07W
07/11/2017  E1.50 INCH       OTTER TAIL         MN   TRAINED SPOTTER

            MOSTLY QUARTER SIZED TO HALF DOLLAR SIZED HAILS, WITH
            SOME HAIL UP TO PING PONG BALL SIZE

0946 PM     TSTM WND GST     2 N DETROIT LAKES       46.84N 95.84W
07/11/2017  M80.00 MPH       BECKER             MN   MESONET

            THE WIND GUST WAS MEASURED BY A RAWS STATION. TIME
            ESTIMATED BASED ON RADAR. NUMEROUS TREES SNAPPED OR
            UPROOTED NEAR FLOYD LAKE. ONE 24X40 SHED LIFTED AND
            COLLAPSED.

0952 PM     TSTM WND GST     3 SSW DETROIT LAKES     46.77N 95.87W
07/11/2017  E80.00 MPH       BECKER             MN   BROADCAST MEDIA

            NUMEROUS LARGE TREES SNAPPED OR UPROOTED AROUND LAKE
            SALLIE, LAKE MELISSA, AND THE GREATER DETROIT LAKES AREA.
            ROADS BLOCKED AND POWER LINES DOWN.

0958 PM     HAIL             HEIGHT OF LAND LAKE     46.89N 95.61W
07/11/2017  E1.75 INCH       BECKER             MN   TRAINED SPOTTER

            LARGE HAIL AND VERY STRONG WINDS BETWEEN ROCHERT AND
            HEIGHT OF LAND LAKE. TREES DOWN ALL OVER THE PLACE.

1000 PM     TSTM WND GST     3 WNW FRAZEE            46.74N 95.76W
07/11/2017  E80.00 MPH       BECKER             MN   BROADCAST MEDIA

            NUMEROUS LARGE TREES BROKEN DOWN AND BLOCKING LANES ALONG
            U.S. HIGHWAY 10 BETWEEN DETROIT LAKES AND FRAZEE.

1004 PM     HAIL             6 SSE FERGUS FALLS      46.20N 96.02W
07/11/2017  E1.50 INCH       OTTER TAIL         MN   PUBLIC

1015 PM     HAIL             EVERGREEN               46.76N 95.45W
07/11/2017  E1.25 INCH       BECKER             MN   PUBLIC

            COULD HAVE BEEN SOME A LITTLE BIGGER, BUT DID NOT GO OUT
            TO LOOK AROUND.

1016 PM     HAIL             OTTERTAIL               46.43N 95.56W
07/11/2017  E1.00 INCH       OTTER TAIL         MN   PUBLIC

1035 PM     HAIL             8 SE BUTLER             46.61N 95.23W
07/11/2017  E1.00 INCH       OTTER TAIL         MN   PUBLIC

1045 PM     HAIL             6 NNW PELICAN RAPIDS    46.65N 96.13W
07/11/2017  E1.00 INCH       OTTER TAIL         MN   PUBLIC

1054 PM     HAIL             4 W SEBEKA              46.63N 95.17W
07/11/2017  E0.75 INCH       OTTER TAIL         MN   EMERGENCY MNGR

            DIME SIZED HAIL WEST OF SEBEKA AND PEA SIZED HAIL IN THE
            CITY

1100 PM     HAIL             2 ESE PELICAN RAPIDS    46.56N 96.05W
07/11/2017  E1.50 INCH       OTTER TAIL         MN   TRAINED SPOTTER

            HAIL UP TO PING PONG SIZED BETWEEN PELICAN RAPIDS AND
            LAKE LIDA.

1115 PM     HAIL             STAR LAKE               46.53N 95.81W
07/11/2017  E1.75 INCH       OTTER TAIL         MN   PUBLIC

            LARGE HAIL ALONG WITH VERY HEAVY RAINS AND STRONG WINDS.

Environment

Here is a summary of the environmental set up from 00z (7 PM) July 12 2017.


300 mb	500 mb	700 mb


850 mb	925 mb


Surface Map	CAPE	Significant Tornado Parameter

Additional Information


SPC Tornado Watch area	Estimated Storm Total Rainfall

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