Hail and Damaging Winds in North Dakota, August 11, 2002

Name: Hail and Damaging Winds in North Dakota, August 11, 2002
Start: 2002-08-11T16:10
End: 2002-08-11T19:00
Location: North Dakota

August 11, 2002 · NWS FGF · 16 events in 10 counties and zones

9 hail, 7 thunderstorm wind, as filed by the National Weather Service.

Where it happened

Every event with a place to put it. Tap one for its entry below.

Tornadoes
Tropical storms and surge
Floods
Wind
Hail
Winter weather
Heat and drought
Cold
Fire, smoke and dust
Marine and coastal
Other

Open the live radar over this ground

The toll

Deaths: 0
Injuries: 0
Property damage: $6,000
Crop damage: None recorded
Events: 16

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.

What forecasters said that day

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 11, 2:15 PM CST, 1 hour 55 minutes earlier.

Area forecast discussion, Aug 11, 2:15 PM CST, 1 hour 55 minutes before

FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
315 PM CDT SUN AUG 11 2002

...FCST CHALLENGE IS SEVERE WEATHER THREAT THROUGH THIS EVENING...

ANALYSIS/NEAR TERM...DISCUSSION IS ABBREVIATED DUE TO SEVERE WEATHER
THREAT. SUPERCELL TSTMS DEVELOPING QUICKLY AHEAD OF A DEEPENING LOW
PRESSURE SYSTEM IN SCNTRL ND...IN AREA OF LOW LVL MOISTURE
CONVERGENCE. STRENGTHENING 500MB (50KT PLUS) JET STREAK NOW ROUNDING
THE BASE OF THE 500MB TROF IN SOUTHWEST MT WILL PROVIDE INCREASING
DYNAMIC SUPPORT FOR STRONG TSTM DEVELOPMENT AND ORGANIZATION THROUGH
THE LATE AFTERNOON AND EVENING HOURS. SWOMCD PROJECTS POSSIBLE
SQUALL LINE DEVELOPMENT...LATE AFTERNOON IN ERN ND THEN EARLY
EVENING INTO WRN MN. SEVERE WATCH IN EFFECT ACROSS ERN ND ATTM. WILL
POSSIBLY NEED ADDN WATCH INTO WRN MN BY EARLY EVENING AS LINE
DEVELOPS.

MONDAY AND TUESDAY...COLD POOL ALOFT SHIFTS ACROSS THE NRN PLAINS ON
MONDAY WITH SHOWERS EXPECTED TO REDEVLOP BY MID AFTERNOON. UPPER LVL
TROUGH THEN ANCHORS OVR THE NRN PLAINS THROUGH THE MIDWEEK PERIOD
KEEPING AREA UNDER SEASONABLY COOLER FLOW NEXT WEAK IMPULSE INTO THE
AREA LATE AFTERNOON TUESDAY. SOME DRYING POSSIBLE BY LATE WEK PERIOD
THOUGH TEMPS REMAIN BELOW SEASONAL NORMALS.

.FGF...SEVERE THUNDERSTORM WATCH FOR EASTERN ND THIS EVENING.

GUST

In the hours before

Special weather statement, Aug 11, 11:15 AM CST, 4 hours 55 minutes before

MNZ001>009-013>017-022>024-027>032-040-NDZ006>008-014>016-024-
026>030-038-039-049-052>054-112000-

SPECIAL WEATHER STATEMENT
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS
1215 PM CDT SUN AUG 11 2002

...THERE IS A MODERATE RISK OF SEVERE THUNDERSTORMS ACROSS EASTERN
NORTH DAKOTA AND WEST CENTRAL AND NORTHWEST MINNESOTA THIS AFTERNOON
AND TONIGHT...

SYNOPSIS...LOW LEVEL MOISTURE WILL INCREASE INTO THE EASTERN DAKOTAS
AND WESTERN MINNESOTA THROUGHTHE AFTERNOON...AHEAD OF A
STRENGTHENING LOW PRESSURE SYSTEM. SCATTERED THUNDERSTORMS WILL
DEVELOP IN EASTERN NORTH DAKOTA BY LATE AFTERNOON...WITH A THREAT OF
LARGE HAIL AND ISOLATED TORNADOES. THESE STORMS WILL LIKELY BECOME
STRONGER AND MORE ORGANIZED THROUGH EARLY EVENING AS UPPER LEVEL
WINDS INCREASE. THROUGH THE EVENING...STORMS MAY BECOME ORGANIZED
INTO A SQUALL LINE...WITH THE POTENTIAL TO PRODUCE AREAS OF DAMAGING
DOWNBURST WINDS.

AREA OF CONCERN...ENTIRE AREA.

TIME...4 PM THROUGH 2 AM.

TYPE OF HAZARD...LARGE HAIL AND ISOLATED TORNADOES LATE AFTERNOON
THROUGH EARLY EVENING...MAINLY DAMAGING WINDS THROUGH LATE EVENING.

GUST
NNNN

Special weather statement, Aug 11, 11:15 AM CST, 4 hours 55 minutes before

MNZ001>009-013>017-022>024-027>032-040-NDZ006>008-014>016-024-
026>030-038-039-049-052>054-112000-

SPECIAL WEATHER STATEMENT...CORRECTED...
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS
1215 PM CDT SUN AUG 11 2002

...THERE IS A MODERATE RISK OF SEVERE THUNDERSTORMS ACROSS EASTERN
NORTH DAKOTA AND WEST CENTRAL AND NORTHWEST MINNESOTA THIS AFTERNOON
AND TONIGHT...

SYNOPSIS...LOW LEVEL MOISTURE WILL INCREASE INTO THE EASTERN DAKOTAS
AND WESTERN MINNESOTA THROUGH THE AFTERNOON...AHEAD OF A
STRENGTHENING LOW PRESSURE SYSTEM. SCATTERED THUNDERSTORMS WILL
DEVELOP IN EASTERN NORTH DAKOTA BY LATE AFTERNOON...WITH A THREAT OF
LARGE HAIL AND ISOLATED TORNADOES. THESE STORMS WILL LIKELY BECOME
STRONGER AND MORE ORGANIZED THROUGH EARLY EVENING AS UPPER LEVEL
WINDS INCREASE. THROUGH THE EVENING...STORMS MAY BECOME ORGANIZED
INTO A SQUALL LINE...WITH THE POTENTIAL TO PRODUCE AREAS OF DAMAGING
DOWNBURST WINDS.

AREA OF CONCERN...ENTIRE AREA.

TIME...4 PM THROUGH 2 AM.

TYPE OF HAZARD...LARGE HAIL AND ISOLATED TORNADOES LATE AFTERNOON
THROUGH EARLY EVENING...MAINLY DAMAGING WINDS THROUGH LATE EVENING.

GUST
NNNN

The radar

The national radar mosaic for the moment the first event began.

Open the radar archive at this moment

Event by event

9 hail, 7 thunderstorm wind. Local standard time, as filed.

Hail, Eddy

When: August 11, 4:10 PM CST
Where: Eddy County, 5 mi SW of Hamar
Measured: 1 in hail
Reported by: GENERAL PUBLIC
Coordinates: 47.800, -98.633

Hail, Benson

When: August 11, 4:15 PM CST
Where: Benson County, Warwick
Measured: 1.75 in hail
Reported by: GENERAL PUBLIC
Coordinates: 47.850, -98.683

Hail, Ramsey

When: August 11, 4:30 PM CST
Where: Ramsey County, 3 mi S of Doyon
Measured: 0.75 in hail
Reported by: GENERAL PUBLIC
Coordinates: 48.000, -98.533

Hail, Ramsey

When: August 11, 4:30 PM CST
Where: Ramsey County, 2 mi E of Crary
Measured: 1.75 in hail
Reported by: GENERAL PUBLIC
Coordinates: 48.067, -98.600

Hail, Nelson

When: August 11, 4:30 PM CST
Where: Nelson County, 7 mi SW of Lakota
Measured: 0.75 in hail
Reported by: GENERAL PUBLIC
Coordinates: 47.967, -98.450

Hail, Ramsey

When: August 11, 4:35 PM CST
Where: Ramsey County, 14 mi E of Devils Lake
Measured: 0.75 in hail
Reported by: GENERAL PUBLIC
Coordinates: 48.100, -98.550

Hail, Nelson

When: August 11, 4:55 PM CST
Where: Nelson County, 6 mi SW of Lakota
Measured: 1.25 in hail
Reported by: GENERAL PUBLIC
Coordinates: 47.967, -98.450

Thunderstorm Wind, Griggs

When: August 11, 4:55 PM CST to 5:10 PM CST
Where: Griggs County, 7 mi WSW of Hannaford
Measured: 52 kt (60 mph)
Reported by: GENERAL PUBLIC
Coordinates: 47.283, -98.317

Hail, Ramsey

When: August 11, 5:05 PM CST to 5:15 PM CST
Where: Ramsey County, 1 mi NE of Lawton
Measured: 1.25 in hail
Reported by: GENERAL PUBLIC
Coordinates: 48.300, -98.367

Hail, Walsh

When: August 11, 5:10 PM CST
Where: Walsh County, 6 mi SW of Fairdale
Measured: 1 in hail
Reported by: GENERAL PUBLIC
Coordinates: 48.417, -98.333

Thunderstorm Wind, Steele

When: August 11, 5:15 PM CST
Where: Steele County, 5 mi SW of Finley
Property damage: $300
Reported by: GENERAL PUBLIC
Coordinates: 47.467, -97.933

Branches were blown down.

Thunderstorm Wind, Cass

When: August 11, 6:05 PM CST
Where: Cass County, Davenport
Measured: 56 kt (64 mph)
Reported by: GENERAL PUBLIC
Coordinates: 46.717, -97.067

Thunderstorm Wind, Cass

When: August 11, 6:10 PM CST
Where: Cass County, Argusville
Measured: 52 kt (60 mph)
Reported by: LAW ENFORCEMENT
Coordinates: 47.050, -96.933

Thunderstorm Wind, Cass

When: August 11, 6:10 PM CST
Where: Cass County, Fargo
Property damage: $5,000
Reported by: NEWSPAPER
Coordinates: 46.867, -96.783

Trees fell on power lines, knocking out power to 3,180 customers for about 90 minutes.

Thunderstorm Wind, Traill

When: August 11, 6:14 PM CST
Where: Traill County, 10 mi SE of Hillsboro
Measured: 58 kt (67 mph)
Reported by: GENERAL PUBLIC
Coordinates: 47.300, -96.917

Thunderstorm Wind, Pembina

When: August 11, 7:00 PM CST
Where: Pembina County, Drayton
Property damage: $1,000
Reported by: NEWSPAPER
Coordinates: 48.567, -97.167

Large trees were blown down at the cemetary.

What these are

Hail: Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
Thunderstorm Wind: Winds from a thunderstorm of 50 knots (58 mph) or more, or lower winds that caused damage or casualties. Measured gusts are marked MG, estimated EG.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

Every storm in North Dakota in 2002 Every state in 2002 This day in weather history Warnings in North Dakota, August 2002

Sources

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: 5317353, 5317354, 5317355, 5317356, 5317357, 5317358, 5317359, 5317360, 5317361, 5317362, 5317363, 5317364, 5317365, 5317366, 5317367, 5317368.