Strong wind gusts occurred along a line of dissipating thunderstorms. Sustained winds above 40 mph with gusts up to 55 mph caused some tree damage.
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Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS FGF wrote it up.
Strong wind gusts occurred along a line of dissipating thunderstorms. Sustained winds above 40 mph with gusts up to 55 mph caused some tree damage.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Grand Forks, ND wrote its last area forecast discussion before the first event at Jun 13, 2:50 AM CST, 1 hour 25 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GRAND FORKS ND 350 AM CDT MON JUN 13 2011 .SHORT TERM... FOCUS TODAY IS ON PRECIPITATION CHANCES....AND THAT IS THE FOCUS REALLY FOR THIS NEXT WEEK. WELL DEFINED VORT MAX AND SFC LOW MOVING NORTH OVER MINOT EARLY THIS MORNING...WITH TROUGH SOUTH TO NEAR GARRISION TO NEAR HETTINGER. WIND FIELD IS QUITE WEAK HOWEVER WITH TROUGH AXIS ILL DEFINED IN MANY AREAS. MAIN AREA OF RAIN AND TSTMS WAS ASSOC WITH VORT MAX AND LIFTING INTO SOUTHWEST MANITOBA. BAND OF RAIN PUSHING EAST HAS HIT THE DRY WALL OVER THE NORTHERN AND CENTRAL RED RIVER VALLEY AND IS FALLING APART AND HRRR MODEL SHOWS LITTLE IF ANYTHING REMAINING BY 12Z. ACTIVITY IN SOUTH DAKOTA A BIT MORE ORGANZIED WITH NORTHERN EDGE INTO SRN VALLEY. BUT THAT TOO WILL RUN INTO DRY AIRMASS SITUATED FERGUS FALLS-ALEXANDRIA AREA AND SHOULD START TO WEAKEN AS WELL. THUS AT 12Z AND FOR THE MORNING HOURS NOT EXPECTING A WHOLE LOT LEFT OVER IN THE FCST AREA. SO DID BACK OFF FROM LIKELY POPS THIS MORNING BUT KEPT CHC POPS AS 850 MB DEW PT AXIS DOES SLOWLY SLIDE EAST AND IS OVER THE VALLEY AT 18Z AND THEN RESIDES FROM NE SD INTO FAR NW MN AT 00Z. MODELS SHOW ANOTHER VORT MAX TO MOVE THRU DVL REGION AND IF SOME CLEARING CAN OCCUR OVER ERN ND TODAY...MU CAPES OF 2000 J/KG WILL BE PSBL THIS AFTN. WK BOUNDARY IN CNTRL ND WILL MOVE A LITTLE FARTHER EAST TOWARD DEVILS LAKE-JAMESTOWN LINE AT MID AFTN AND THIS BOUNDARY ALONG WITH SOME INSTABILITY IN LOW LEVEL MOISTURE AXIS SHOULD LEAD TO SOME TSTM RE-DEVELOPMENT. THUS DID SPREAD POPS BACK A BIT WEST TO INCLUDE DVL REGION THIS AFTN. SCAT SHOWERS OR THUNDERSTORMS WILL OCCUR EARLY ON THIS EVENING AS VORT MOVES THRU NE ND INTO SE MANITOBA...BUT THEN A BIT DRIER AIR WILL MOVE IN ALOFT WITH MOST OF THE PRECIP DISSIPATING OVER ERN ND THOUGH SOME MAY LINGER OVER NW/WCNTRL MN. NEXT PRETTY STRONG 500 MB WAVE WILL MOVE FROM OREGON AND INTO CNTRL-NRN ND TUESDAY WITH NEXT ROUND OF PRECIP SPREADING INTO THE AREA TUES AFTN-NIGHT...WITH 500 MB SYSTEM CLOSING OFF AND DROPPING SOUTHWARD INTO SRN MN WEDNESDAY. MAIN PRECIP ONCE AGAIN APPEARS TO HIT WRN INTO NCNTRL ND BUT DECENT CHANCES FOR RAINS IN OUR FCST AREA AS WELL TUES EVE. INSTABILITY PRESENT FOR THUNDER...BUT FORSEE NO SVR WX. .LONG TERM... UPPER LEVEL SYSTEM WILL EXIT SRN MINNESOTA LATE WEDNESDAY WITH BRIEF UPPER RIDGE BUILDING INTO AREA THURSDAY. SO THAT DAY APPEARS DRY AND MILD. THEN NEXT 500 MB WAVE FROM THE PAC NORTHWEST WILL MOVE IN FRIDAY-SAT WITH MODELS VARIED IN TIMING AND EVOLUTION OF A BROAD 500 MB LOW OVER SOUTH CENTRAL CANADA-NORTH DAKOTA EARLY NEXT WEEK. THIS WILL KEEP PCPN CHANCES THIS WEEKEND INTO EARLY NEXT WEEK. && .AVIATION... TRICKY AVIATION FCST TODAY...ESP CEILINGS. MOSTLY VFR CIGS TODAY...THOUGH WILL HAVE BRIEF IFR-LOW MVFR CIGS DUE TO EARLY MORNING SHOWERS DEVILS LAKE TO VALLEY CITY AREAS THROUGH 12Z. SOME BRIEF MVFR CIGS MAY MOVE INTO GFK-FAR THIS MORNING BEFORE SCATTERING OUT TO A VFR CEILING TODAY. SOUTHEAST WINDS WILL REMAIN BREEZY TODAY MOSTLY 15-20KTS. && .FGF WATCHES/WARNINGS/ADVISORIES... ND...NONE. MN...NONE. && RIDDLE
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GRAND FORKS ND 715 AM CDT SUN JUN 12 2011 MNZ001>009-013>017-022>024-027>032-040-NDZ006>008-014>016-024- 026>030-038-039-049-052>054-131215- WEST POLK-NORMAN-CLAY-KITTSON-ROSEAU-LAKE OF THE WOODS- WEST MARSHALL-EAST MARSHALL-NORTH BELTRAMI-PENNINGTON-RED LAKE- EAST POLK-NORTH CLEARWATER-SOUTH BELTRAMI-MAHNOMEN- SOUTH CLEARWATER-HUBBARD-WEST BECKER-EAST BECKER-WILKIN- WEST OTTER TAIL-EAST OTTER TAIL-WADENA-GRANT-TOWNER-CAVALIER- PEMBINA-BENSON-RAMSEY-EASTERN WALSH-EDDY-NELSON-GRAND FORKS- GRIGGS-STEELE-TRAILL-BARNES-CASS-RANSOM-SARGENT-RICHLAND- WESTERN WALSH- 715 AM CDT SUN JUN 12 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EASTERN NORTH DAKOTA...WEST CENTRAL AND NORTHWEST MINNESOTA. .DAY ONE...TODAY AND TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY THE UPCOMING WEEK WILL BE UNSETTLED AS SEVERAL WEATHER DISTURBANCES MOVE THROUGH THE NORTHERN PLAINS. THIS WILL CAUSE PERIODIC CHANCES FOR SHOWERS AND THUNDERSTORMS. NO SEVERE WEATHER IS ANTICIPATED...AT LEAST THROUGH MID WEEK WITH ANY OF THESE SYSTEMS. RAINFALL AMOUNTS THROUGH WEDNESDAY OF AN INCH IS EXPECTED WITH LOCALIZED HIGHER AMOUNTS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED. DTR
The national radar mosaic for the moment the first event began.
1 high wind. Local standard time, as filed.
Sustained winds above 40 mph, with gusts to 55 mph, were reported between Mooreton and Wahpeton, downing numerous large tree branches. The peak wind at the Wahpeton airport was 55 mph at 455 am CST.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in North Dakota in 2011Every state in 2011This day in weather historyWarnings in North Dakota, June 2011
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 325127.