2 hail, 2 flash flood, as filed by the National Weather Service.
Every event with a place to put it. Tap one for its entry below.
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 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 16, 7:35 PM CST, 4 hours 40 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GRAND FORKS ND 835 PM CDT TUE AUG 16 2005 FORECAST CHALLENGE CONCERNS T CHANCES AND TEMPERATURES. WDLY SCT CONVECTION CONTINUES TO INITIATE ALONG E-W ORIENTED BOUNDARY OVER FAR SOUTHERN FA. WITH LACK OF LOW LEVEL JET...LOSS OF SURFACE HEATING AND UPPER SUPPORT EXPECT STORMS TO GRADUALLY DIMINISH TOWARDS SUNSET. MAIN CONVECTIVE SHOW CURRENTLY OVER NORTHERN HIGH PLAINS VCNTY SFC LOW...ASSOCIATED N-S BOUNDARY AIDED BY APPROACHING SHORTWAVE ENERGY AND RELATED INCREASING WARM ADVECTION. RUC APPEARS TO HAVE GOOD HANDLE ON SITIUATION. LOW LEVEL JET INCREASES TO NEAR 40KTS OVER WESTERN/CENTRAL ND AND WARM ADVECTION INCREASES AND SPREADS EAST TOWARDS FA LATE...MAINLY ACROSS NORTHERN FA. THIS SHOULD KEEP CONVECTION PROPAGATING EAST AND WILL MAINTAIN CURRENT POPS/T WORDING HOWEVER WILL DELAY ANY ARRIVAL UNTIL LATE TONIGHT AS T YET TO ENTER W ND. AS WARM FRONT LIFTS SLOWLY NORTH OVERNIGHT HIGHER DEWPOINTS SHOULD HOLD TEMPERATURES UP. FARTHER NORTH WITH LOW DEWPOINTS COULD SEE RELATIVELY QUICK DROP BEFORE CLOUDS LEVEL OFF TEMPERATURES. WILL MAKE SOME MINOR ADJUSTMENTS ACROSS SOUTH OTHERWISE NO BIG CHANGES TO TEMPERATURES. && .AVIATION...EXPECT VFR CONDITIONS TONIGHT INTO WEDNESDAY WITH POCKETS OF MVFR CIGS/ VSBYS LATER TONIGHT/WEDNESDAY IN CONJUNCTION WITH STRONGER CONVECTION. && .FGF WATCHES/WARNINGS/ADVISORIES... ND...NONE. MN...NONE. && VOELKER
HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE GRAND FORKS ND 303 PM CDT TUE AUG 16 2005 MNZ001>009-013>017-022>024-027>032-040-NDZ006>008-014>016-024- 026>030-038-039-049-052>054-172015- 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- 303 PM CDT TUE AUG 16 2005 ...SEVERE THUNDERSTORMS ARE EXPECTED ACROSS NORTHEASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA LATER TONIGHT... ...SEVERE THUNDERSTORMS CAN BE EXPECTED AGAIN WEDNESDAY AND THURSDAY... THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EASTERN NORTH DAKOTA...WEST CENTRAL AND NORTHWEST MINNESOTA. .DAY ONE...THIS AFTERNOON AND TONIGHT ISOLATED THUNDERSTORMS ARE EXPECTED SOUTH OF A VALLEY CITY TO FARGO TO PARK RAPIDS LINE THIS AFTERNOON NEAR A STATIONARY FRONT. THESE STORMS ARE EXPECTED TO REMAIN BELOW SEVERE LIMITS. THUNDERSTORMS ARE EXPECTED TO DEVELOP IN WESTERN NORTH DAKOTA LATE THIS EVENING AND MOVE INTO EASTERN NORTH DAKOTA AFTER MIDNIGHT...THEN INTO NORTHWEST MINNESOTA TOWARD DAYBREAK. THE MAIN SEVERE THREATS WILL BE LARGE HAIL...WITH DAMAGING WINDS ALSO POSSIBLE TOWARD DAYBREAK. A WARM FRONT WILL LIFT NORTHWARD OVERNIGHT AIDING IN THUNDERSTORM DEVELOPMENT UNDER AN UNSTABLE AIRMASS. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY A SLIGHT RISK OF SEVERE THUNDERSTORMS IS FORECAST FOR THE SOUTHERN HALF OF THE RED RIVER VALLEY SOUTH OF A LINE FROM VALLEY CITY NORTH DAKOTA TO WASKISH MINNESOTA. THE SEVERE WEATHER WILL BE MOST LIKELY IN THE AFTERNOON AND EVENING AND WILL MOST LIKELY PRODUCE HAIL. A SLIGHT RISK OF SEVERE THUNDERSTORMS IS FORECAST FOR AGAIN FOR THE SOUTHERN HALF OF THE RED RIVER VALLEY AND IN THE SAME AREA FROM VALLEY CITY NORTH DAKOTA TO WASKISH MINNESOTA. THE STORMS WOULD BE MOST LIKELY FROM LATE MORNING INTO THE AFTERNOON WITH HAIL THE MOST LIKELY THREAT. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE REQUIRED. JCA
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS
858 PM CDT TUE AUG 16 2005
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0851 PM HAIL 3 S ASHBY 46.05N 95.82W
08/16/2005 0.75 INCH GRANT MN LAW ENFORCEMENT
&&
DKThe Fargo/Grand Forks radar (KMVX), 65 km away, was scanning. The volume nearest the first event began at 06:16 UTC.
2 hail, 2 flash flood. Local standard time, as filed.
The large hail produced heavy crop damage across northern portions of Casselton and Harmony Townships. Rainfall amounts ranged from 2 to 3 inches.
The hail occurred intermittently for about 25 minutes. The hail was predominantly pea to small marble size with a few as big as quarters. The hail was 2 inches deep in places and stripped leaves from trees and gardens.
City streets and the park were flooded due to the rapid rain rates, with over 4.50 inches of rain measured through the morning. Several basements were flooded as well.
Two to three inches of rain fell in roughly 90 minutes. Up to 2 feet of water covered portions of 24th avenue south between Washington and 28th street in south Grand Forks. One underground parking garage in south Grand Forks had water 6 inches deep on the garage floor.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in North Dakota in 2005Every state in 2005This day in weather historyWarnings in North Dakota, August 2005
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: 5472177, 5472178, 5472179, 5472180.