Alert archive / North Dakota / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 336, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Sep 1, 2002, 12:28 AM CDT for Sargent County, North Dakota. It was in force for 47 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Sep 1, 2002, 12:28 AM CDT (05:28 UTC)
- Expired
- Sep 1, 2002, 1:15 AM CDT
- In force
- 47 min
- Issued by
- NWS Grand Forks, ND
- Area
- Counties, with a storm outline in the text
County Sargent County, ND
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Aug 31, 9:55 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Aberdeen, SD (KABR), launched 00:00Z, 5.5 hours before the alert went out and 134 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 3369 J/kg
- Mixed-layer CIN
- -54 J/kg
- Mixed-layer LCL
- 1554 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 130 m²/s²
- 0-3 km storm-relative helicity
- 161 m²/s²
- Significant tornado parameter
- 0.7
- Supercell composite
- 4.4
The text
As transmitted, in the capitals the NWS used until 2016.
451 WUUS53 KFGF 010528 SVRFAR NDC081-010615- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS 1228 AM CDT SUN SEP 1 2002 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHERN SARGENT COUNTY IN SOUTHEAST NORTH DAKOTA. * UNTIL 115 AM CDT. * AT 1225 AM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 5 MILES SOUTH OF STRAUBVILLE...OR ABOUT 65 MILES WEST OF WAHPETON...MOVEMENT WAS TO THE EAST AT 40 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... BRAMPTON AT 1230 AM... HAVANA AT 1240 AM... RUTLAND AT 1250 AM AND CAYUGA AT 1255 AM. REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 400 AM SUNDAY MORNING FOR NORTHWESTERN MINNESOTA AND EASTERN NORTH DAKOTA. LAT...LON 4607 9800 4589 9801 4585 9724 4612 9727 06 NNNN
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, 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 this severe thunderstorm warning went out at Aug 31, 8:45 PM CDT, 3 hours 43 minutes earlier.
Area forecast discussion, Aug 31, 8:45 PM CDT, 3 hours 43 minutes before
FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
845 PM CDT SAT AUG 31 2002
SEVERE THUNDERSTORMS ARE CONFINED SO FAR TO EXTREME NORTHERN RED
RIVER VALLEY BUT TRAINING THUNDERSTORMS ARE APPROACHING ON SEVERAL
FRONTS AT WEST/SOUTHWEST SIDE OF CWA. BELIEVE THE AVN WAS MOST
CORRECT IN PLACEMENT OF HEAVIEST RAIN TONIGHT BUT FLOOD WATCH IN
EFFECT THROUGHOUT REGION IS STILL VALID WITH SATURATED SOILS IN
ABUNDANCE. WILL LEAVE ZONES BASICALLY ALONE BUT WILL ADD EMPHASIS
ON FLOOD POTENTIAL AS NONE WAS INCLUDED EARLIER.
.FGF...FLASH FLOOD WATCH ENTIRE CWA TONIGHT.
SEVERE THUNDERSTORM WATCH TIL MIDNIGHT NORTH HALF EXCEPT LAKE
OF THE WOODS AND BELTRAMI COUNTIES.
GVThe office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 31, 7:13 PM CDT | Severe Thunderstorm Warning | FGF | Cavalier | 47 min |
| Aug 31, 7:22 PM CDT | Flash Flood Warning | FGF | Cavalier | 4 hr |
| Aug 31, 7:45 PM CDT | Severe Thunderstorm Warning | FGF | Pembina | 45 min |
| Aug 31, 7:56 PM CDT | Severe Thunderstorm Warning | FGF | Cavalier | 34 min |
| Aug 31, 8:32 PM CDT | Severe Thunderstorm Warning | FGF | Cavalier | 43 min |
| Aug 31, 8:42 PM CDT | Tornado Warning | FGF | Cavalier | 33 min |
| Aug 31, 8:53 PM CDT | Severe Thunderstorm Warning | FGF | Pembina | 52 min |
| Aug 31, 9:00 PM CDT | Severe Thunderstorm Warning | FGF | Benson, Towner | 45 min |
| Aug 31, 9:11 PM CDT | Severe Thunderstorm Warning | FGF | Cavalier | 49 min |
| Aug 31, 9:43 PM CDT | Severe Thunderstorm Warning | FGF | Benson, Ramsey, Towner | 62 min |
| Aug 31, 9:47 PM CDT | Severe Thunderstorm Warning | FGF | Pembina | 43 min |
| Aug 31, 10:02 PM CDT | Severe Thunderstorm Warning | FGF | Cavalier | 43 min |
| Aug 31, 10:07 PM CDT | Flash Flood Warning | FGF | Cavalier, Pembina | 3 hr |
| Aug 31, 10:20 PM CDT | Severe Thunderstorm Warning | FGF | Barnes, Griggs | 55 min |
| Aug 31, 10:30 PM CDT | Severe Thunderstorm Warning | FGF | Pembina | 45 min |
| Aug 31, 10:45 PM CDT | Severe Thunderstorm Warning | FGF | Cavalier | 45 min |
| Aug 31, 10:52 PM CDT | Severe Thunderstorm Warning | FGF | Cass | 53 min |
| Aug 31, 11:15 PM CDT | Severe Thunderstorm Warning | FGF | Barnes | 30 min |
| Aug 31, 11:18 PM CDT | Severe Thunderstorm Warning | FGF | Pembina | 42 min |
| Sep 1, 1:19 AM CDT | Severe Thunderstorm Warning | FGF | Richland | 41 min |
Nearby
Severe Thunderstorm Warnings in North Dakota, 2002Every severe thunderstorm warning in 2002
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.