North Dakota, 2001

Hail in North Dakota, August 21, 2001

August 21, 2001 · NWS FGF · 3 events in 2 counties and zones

3 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

Open the live radar over this ground

The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
3

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 21, 1:05 PM CST, 6 hours 10 minutes earlier.

Area forecast discussion, Aug 21, 1:05 PM CST, 6 hours 10 minutes before
FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
205 PM CDT TUE AUG 21 2001

CONVECTIVE THREAT IS THE MAIN FORECAST CHALLENGE TONIGHT. MODELS IN
REASONABLE AGREEMENT IN THE UPPER LEVEL FEATURES FOR THE NEXT 48
HOURS BUT THERE ARE SOME MINOR DIFFERENCES AT THE SFC/850 MB. IN THE
SHORT TERM...ETA DOING BEST WITH SFC TEMPS WHILE AVN BEST WITH THE
SLOW EASTWARD PROGRESSION OF THE SFC FRONT. LIKE THE DRIER QPF WITH
THE ETA...SO WILL USE A BLEND OF THE ETA AND AVN.

FRONT PUSHES INTO THE NORTHERN VALLEY AFTER 00Z TONIGHT. SFC/850 MB
FORCING ALONG THE FRONT HAS BEEN WEAK ALL DAY AND THIS REMAINS THE
CASE TONIGHT. BEST FORCING IS IN ONTARIO AND THE CENTRAL PLAINS.
UPPER SUPPORT ALSO WEAK...BUT AGREE WITH SPC SWODY1 THAT CANADIAN
BORDER REGION IN NORTHWEST MN STANDS THE BEST CHANCE OF AN ISOLATED
STORM. FWC/MAV GUIDANCE CLOSE AND WILL FOLLOW.

SFC HIGH PRESSURE BUILDS INTO THE REGION ON WED WITH NORTHEAST WIND
FLOW ADVECTING IN DRIER AIR. AVN HANGING UP FRONTAL BOUNDARY ALONG A
KISN TO KBDE LINE WITH MAX QPF AT 12Z WED. ETA FRONTAL POSITION MUCH
FURTHER EAST. THEREFORE ETA SHOWS CAPE AROUND 1200 J/KG WITH LIS AT
-5 ACROSS SOUTHEAST ZONES AT 12Z WED. HOWEVER...ONCE AGAIN AREA
UNDER NVA AND Q VECTOR DIVERGENCE. 300 MB WINDS STARTING TO BECOME
RATHER ANEMIC IN THE MORNING. SO WILL NOT CARRY A LOW POP EARLY WED
ACROSS THE SOUTHEAST ZONES. SOME COOLING IN THE 850-700 MB LAYER
ESPECIALLY IN NORTHEAST ZONES...SO MOST AREAS WILL SEE TEMPS SIMILAR
TO TODAY OR SLIGHTLY COOLER. GOOD DRYING WED NIGHT WITH COOLER TEMPS
AS A RESULT OF THE DRIER AIR. RETURN FLOW SETS UP ON THU WHILE
PRESSURE GRADIENT BEGINS TO TIGHTEN ACROSS WESTERN AND CENTRAL ND.

.EXTENDED...LARGE SCALE PATTERN CHANGE WILL TAKE PLACE DURING THE
EXTENDED PERIOD AS UPPER LEVEL TROUGH CURRENTLY OVER THE PACIFIC
NORTHWEST DIGS INTO THE CENTER OF THE CONTINENT. EXTENDED MODELS
AGREE ON GENERAL DETAILS. THUNDERSTORMS ARE EXPECTED FRIDAY INTO
EARLY SATURDAY ALONG AND AHEAD OF SIGNIFICANT FROPA. A HINT OF
SEPTEMBER-LIKE WEATHER SHOULD BE IN PLACE FOR THE WEEKEND WITH
RETURN FLOW STARTING A SLOW WARMING TREND ON TUESDAY.

.FGF...NONE.

GODON/BRAMER

The radar

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

Open the radar archive at this moment

Event by event

3 hail. Local standard time, as filed.

Hail, Towner

When
August 21, 7:15 PM CST
Where
Towner County, 13 mi E of Hansboro
Measured
1.75 in hail
Reported by
GENERAL PUBLIC
Coordinates
48.950, -99.083

Hail, Towner

When
August 21, 7:20 PM CST
Where
Towner County, 14 mi SE of Hansboro
Measured
1.75 in hail
Reported by
GENERAL PUBLIC
Coordinates
48.800, -99.150

Hail, Cavalier

When
August 21, 7:30 PM CST
Where
Cavalier County, 2 mi NW of Calvin
Measured
0.75 in hail
Reported by
GENERAL PUBLIC
Coordinates
48.867, -98.950

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

More

Every storm in North Dakota in 2001Every state in 2001This day in weather historyWarnings in North Dakota, August 2001

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: 5265320, 5265321, 5265322.