Hail, Mahnomen
- When
- July 20, 7:15 AM CST
- Where
- Mahnomen County, 1 mi W of Mahnomen
- Measured
- 0.75 in hail
- Reported by
- GENERAL PUBLIC
- Coordinates
- 47.317, -96.000
Hail in Minnesota, July 20, 2002
1 hail, 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
The toll
- Deaths
- 0
- Injuries
- 0
- Property damage
- None recorded
- Crop damage
- None recorded
- Events
- 1
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 Jul 20, 1:15 AM CST, 6 hours earlier.
Area forecast discussion, Jul 20, 1:15 AM CST, 6 hours before
FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 215 AM CDT SAT JUL 20 2002 FORECAST CHALLENGE IS CONVECTION TODAY INTO TONIGHT...THEN TEMPS .OVERVIEW... SFC TROUGH NOW ENTERING WESTERN ND...ALONG WITH ONE AREA OF LOW PRESSURE NEAR PIR...AND ANOTHER IN SOUTHERN SASKATCHEWAN. ALL OF EASTERN ND UNSTABLE WITH DEWPOINTS NEAR 70...WITH MID 60S TO THE EAST IN MN. ETA DID THE BEST JOB INITIALIZING CONVECTION IN WESTERN ND AND BOUNDARY LAYER MOISTURE...SO WILL USE THIS FORECAST PACKAGE. .TODAY... EXPECT ELEVATED ROUND OF CONVECTION TO BE ONGOING ACROSS EASTERN ND...INTO WEST CENTRAL MN THIS MORNING ON HEELS OF 45KT 500MB SPEED MAX AND 30KT LOW LEVEL JET. BY AFTERNOON...CAPES APPROACH 3000J/KG...ALONG WITH PRECIPITABLE WATERS NEAR 2 INCHES AND GOOD FORCING ALONG SFC TROUGH. CAP SHOULD WEAKEN AROUND 18Z FOR POTENTIAL SEVERE WEATHER OUTBREAK IN EASTERN ND...THEN MOVING INTO MN BY EVENING. WITH 50KT NEAR 500MB...GOOD SHEAR AND RIGHT ENTRANCE REGION OF 75KT 300MB JET...EXPECT A FEW SUPERCELLS WITH ISOLATED TORNADOES...WHICH MAY CONSOLIDATE INTO MCS AS IT MOVES EAST THIS EVENING. ANY STORMS WILL DROP HEAVY RAIN...SO WILL MENTION IN ZONES WITH SEVERE WORDING AND LIKELY POPS. REFER TO SWODY1 FOR FURTHER DETAILS ON SEVERE WEATHER THREAT. .TONIGHT THROUGH MONDAY... DRIER AIR WILL FILTER THROUGH REGION BY 12Z SUNDAY...IN WAKE OF SHORTWAVE AND SUBSIDENCE BEHIND VORTICITY MAXIMUM. 850MB TEMPS COOL TO AROUND +15C ON SUNDAY...SO EXPECT TEMPS WITHIN A FEW DEGREES OF 80 ALONG WITH PLENTY OF SUN. BY MONDAY...A SECONDARY COLD FRONT WILL PUSH INTO NORTHERN ZONES...SO WILL INSERT SCATTERED THUNDER MENTION IN NORTHEAST AS TEMPS COOL INTO THE 70S. .FGF...FLOOD WARNING CONTINUES FOR RED RIVER NEAR OSLO. KELLENBENZ
In the hours before
Special weather statement, Jul 20, 4:00 AM CST, 3 hours 15 minutes before
MNZ001>009-013>017-022>024-027>032-040-NDZ006>008-014>016-024- 026>030-038-039-049-052>054-201400- SPECIAL WEATHER STATEMENT HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS 500 AM CDT SAT JUL 20 2002 ...THERE IS A SLIGHT CHANCE OF SEVERE THUNDERSTORMS TODAY ACROSS EASTERN NORTH DAKOTA...NORTHWEST AND WEST CENTRAL MINNESOTA... SYNOPSIS...ABUNDANT LOW LEVEL MOISTURE WILL COMBINE WITH AN UPPER LEVEL DISTURBANCE AND PRODUCE THUNDERSTORMS TODAY ACROSS THE ENTIRE REGION. THUNDERSTORMS WILL MOVE ACROSS EASTERN NORTH DAKOTA THIS MORNING...AND INTO WEST CENTRAL MINNESOTA BY LATE MORNING. ADDITIONAL THUNDERSTORMS WILL DEVELOP EARLY THIS AFTERNOON ACROSS EASTERN NORTH DAKOTA...AND MOVE INTO ADJACENT NORTHWEST AND WEST CENTRAL MINNESOTA BY LATE AFTERNOON INTO THIS EVENING. AREA OF CONCERN...THERE IS A SLIGHT CHANCE OF SEVERE THUNDERSTORMS ACROSS ALL OF EASTERN NORTH DAKOTA...NORTHWEST AND WEST CENTRAL MINNESOTA TODAY. TIME...7AM UNTIL 9 PM. TYPE OF HAZARD...LARGE HAIL AND DAMAGING WIND ARE THE MAIN THREAT ...ALONG WITH ISOLATED TORNADOES POSSIBLE THIS AFTERNOON. ANY THUNDERSTORM WILL ALSO PRODUCE HEAVY RAIN...WITH SOME LOCALIZED FLOODING POSSIBLE. KELLENBENZ NNNN
The radar
The Fargo/Grand Forks radar (KMVX), 102 km away, was scanning. The volume nearest the first event began at 13:17 UTC.
Event by event
1 hail. Local standard time, as filed.
What these are
- Hail
- Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Heat in Missouri, July 20 to 22, 2002
- Damaging Wind in Florida, July 20, 2002
- Heat in Maryland, July 20, 2002
- Damaging Winds in South Dakota, July 20, 2002
- Damaging Wind in Georgia, July 20, 2002
- Lightning Strike in South Carolina, July 20, 2002
- Hail and Damaging Wind in Alabama, July 20, 2002
- Heat in Illinois, July 20 to 22, 2002
- Damaging Wind in Florida, July 20, 2002
- Hail and Damaging Winds in Oklahoma, July 20 to 22, 2002
- Lightning Strike in North Carolina, July 20, 2002
- Hail and Damaging Winds in Florida, July 20, 2002
More
Every storm in Minnesota in 2002Every state in 2002This day in weather historyWarnings in Minnesota, July 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: 5303663.