Slow moving thunderstorms dropped heavy rain across portions of western Eddy County.
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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.
Slow moving thunderstorms dropped heavy rain across portions of western Eddy County.
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 Aug 8, 2:49 PM CST, 2 hours 11 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GRAND FORKS ND 349 PM CDT WED AUG 8 2007 .SHORT TERM...MAIN FORECAST CHALLENGE IS PRECIPITATION. LATEST SURFACE ANALYSIS SHOWS TWO LOW PRESSURE SYSTEMS...ONE CENTERED IN N MB AND THE OTHER IN CENTRAL SD WITH A TROF EXTENDING THROUGH CENTRAL ND INTO CENTRAL SD BETWEEN THE TWO LOWS. WHEN COMPARING MODELS... NONE OF THE MODELS HAVE A GREAT HANDLE ON CURRENT CONVECTIVE SITUATION...SO ENDED UP UTILIZING PERSISTENCE AND MODEL COMPROMISE FOR THE FORECAST. WITH MUCH OF E ND STILL UNDER CLOUD COVER...BEST STORMS HAVE FIRED MORE SO IN CENTRAL ND...WHERE THE ATMOSPHERE WAS ABLE TO BETTER HEAT OUT. HOWEVER...AS THE LOW PRESSURE SYSTEMS MOVE E AND CONSIDERING THE CURRENT STORM TRAJECTORY...ANTICIPATE CONVECTION TO MOVE INTO E ND THIS EVENING. WITH A WAVE EVIDENT ON WV IMAGERY MOVING THROUGH THE AREA IN CONJUNCTION WITH SURFACE LOW PRESSURE AND A FRONTAL ZONE...SOME SEVERE STORMS REMAIN POSSIBLE THIS EVENING. CONSEQUENTLY...A SEVERE THUNDERSTORM WATCH HAS ALREADY BEEN ISSUED COVERING MUCH OF S ND AND THE ADJOINING RED RIVER VALLEY COUNTIES OF MN UNTIL 9 PM LOCAL TIME. THE LOWS WILL CONTINUE TO MOVE E OVERNIGHT...DRAGGING THE FRONTAL ZONE THROUGH THE N PLAINS. CONVECTION IS EXPECTED TO WEAKEN AFTER SUNSET AND ALMOST BE OUT OF NW MN BY MIDNIGHT. RESULTANT LIGHT AND VARIABLE WINDS THROUGH THE REMAINDER OF THE NIGHT ALONG WITH SUBSEQUENT LOW LEVEL MOISTURE RESIDENT FROM THE THUNDERSTORM ACTIVITY COULD RESULT IN SOME PATCHY FOG AFTER MIDNIGHT. ANOTHER LOW PRESSURE SYSTEM DEVELOPS W OF THE AREA ON THU AND STARTS ADVANCING INTO THE N PLAINS FOR THU NIGHT...BRINGING THE NEXT CHANCE FOR THUNDERSTORM ACTIVITY FOR FRI INTO SAT. .LONG TERM...SUN-WED)...DEPARTING SYSTEM SUN WILL BRING SOME DRY WEATHER...FOLLOWED BY QUICK MOVING-ZONAL FLOW EMBEDDED LOW SWINGING THROUGH ON MON. AFTERWARD...MORE OF A UPPER RIDGE REGIME WILL TAKE HOLD OVER THE AREA DURING THE LATTER HALF OF EXTENDED PERIOD REFLECTED IN ANOMALOUSLY HIGH H500 ENSEMBLE HEIGHTS. KEPT CONTINUITY WITH TEMPS SLIGHTLY ABOVE AVERAGE THROUGH THE TIME FRAME...BUT ALTERED MUCH OF FCST TO REMOVE POPS FROM DAYS 6 AND 7. ECMWF IN AGREEMENT WITH GFS BRINGING SURFACE HIGH MORE OR LESS OVERHEAD TUE...PERSISTING INTO WED. && .AVIATION...THUNDER SHOULD AT LEAST BE IN VICINITY OF KGFK/KFAR THIS AFTN...MOVING INTO KBJI THIS EVENING. TEMPO GROUP FOR THUNDER INTRODUCED AT VALLEY SITES DURING MOST LIKELY TIME...LATE AFTN. ACTIVITY LOOKS TO DWINDLE OR END BY SUNSET ALONG WITH DIMINISHING WINDS. && .FGF WATCHES/WARNINGS/ADVISORIES... ND...NONE. MN...NONE. && NG/WJB
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GRAND FORKS ND 545 AM CDT WED AUG 8 2007 MNZ001>009-013>017-022>024-027>032-040-NDZ006>008-014>016-024- 026>030-038-039-049-052>054-091045- 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 COUNTY-EDDY-NELSON- GRAND FORKS-GRIGGS-STEELE-TRAILL-BARNES-CASS-RANSOM-SARGENT- RICHLAND-WESTERN WALSH COUNTY- 545 AM CDT WED AUG 8 2007 ...SEVERE THUNDERSTORMS ARE POSSIBLE THIS AFTERNOON AND EVENING... WHAT?,WHERE?,WHEN?,WHY? THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EASTERN NORTH DAKOTA...WEST CENTRAL AND NORTHWEST MINNESOTA. .DAY ONE...TODAY AND TONIGHT STRONG TO SEVERE THUNDERSTORMS ARE POSSIBLE ACROSS EASTERN NORTH DAKOTA THIS AFTERNOON...AND ACROSS NORTHWEST AND WEST CENTRAL MINNESOTA FROM LATE AFTERNOON INTO THE EVENING. SCATTERED SHOWERS AND THUNDERSTORMS WILL MOVE INTO NORTHEAST AND EAST CENTRAL NORTH DAKOTA THROUGH THE MORNING...AHEAD OF AN APPROACHING SURFACE LOW PRESSURE SYSTEM. STRONG TO SEVERE THUNDERSTORMS COULD DEVELOP AND IMPACT THE RED RIVER VALLEY MAINLY BETWEEN 3PM AND 9PM. THESE STORMS MAY PRODUCE LARGE HAIL...DAMAGING WINDS AND AN OCCASSIONAL BRIEF TORNADO. THUNDERSTORMS WILL INTENSIFY EARLY THIS AFTERNOON AS DAYTIME HEATING AND LOW LEVEL MOISTURE FLOW INCREASE INTO SOUTHEAST NORTH DAKOTA...AND THEN SHIFT STEADILY EASTWARD...AHEAD OF THE SURFACE TROUGH. THUNDERSTORMS ARE EXPECTED TO PERSIST AND MOVE ACROSS NORTHWEST AND WESTCENTRAL MINNESOTA THROUGH MIDNIGHT. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY SCATTERED STRONG THUNDERSTORMS ARE POSSIBLE FROM FRIDAY INTO SATURDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE REQUIRED THIS AFTERNOON AND EVENING. GUST
The national radar mosaic for the moment the first event began.
1 flood. Local standard time, as filed.
Farm fields and ditches were flooded by over 2 inches of rain in about an hour.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in North Dakota in 2007Every state in 2007This day in weather historyWarnings in North Dakota, August 2007
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: 46927.