Alert archive / North Dakota / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 201, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Aug 11, 2002, 5:47 PM CDT for Nelson County, Ramsey County, Walsh County, North Dakota. It was in force for 43 min. 2 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Aug 11, 2002, 5:47 PM CDT (22:47 UTC)
- Expired
- Aug 11, 2002, 6:30 PM CDT
- In force
- 43 min
- Issued by
- NWS Grand Forks, ND
- Area
- Counties, with a storm outline in the text
Counties Nelson County, ND, Ramsey County, ND, Walsh County, ND
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 11, 6:05 PM CDT | Hail 1.25 | Lawton, ND | |
| Aug 11, 6:10 PM CDT | Hail 1 | Fairdale, ND |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
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 11, 1:55 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 12:00Z, 10.8 hours before the alert went out and 243 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
- 194 J/kg
- Mixed-layer CIN
- -368 J/kg
- Mixed-layer LCL
- 1960 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 423 m²/s²
- 0-3 km storm-relative helicity
- 466 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
The text
As transmitted, in the capitals the NWS used until 2016.
177 WUUS53 KFGF 112247 SVRFAR NDC063-071-099-112330- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS 547 PM CDT SUN AUG 11 2002 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NELSON COUNTY IN NORTHEAST NORTH DAKOTA... EASTERN RAMSEY COUNTY IN NORTHEAST NORTH DAKOTA AND WESTERN WALSH COUNTY IN NORTHEAST NORTH DAKOTA. * UNTIL 630 PM CDT. * AT 544 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 2 MILES NORTHWEST OF BROCKET...OR ABOUT 24 MILES EAST OF DEVILS LAKE...MOVEMENT WAS TO THE EAST AT 30 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... LAWTON AT 550 PM. REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 700 PM SUNDAY EVENING FOR NORTHWEST MINNESOTA AND EASTERN NORTH DAKOTA. LAT...LON 4834 9860 4810 9844 4817 9801 4846 9820 30 NNNN
The office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 11, 4:54 PM CDT | Severe Thunderstorm Warning | FGF | Eddy | 51 min |
| Aug 11, 5:08 PM CDT | Severe Thunderstorm Warning | FGF | Benson, Nelson, Ramsey | 37 min |
| Aug 11, 5:44 PM CDT | Severe Thunderstorm Warning | FGF | Barnes | 61 min |
| Aug 11, 5:54 PM CDT | Severe Thunderstorm Warning | FGF | Griggs, Steele | 51 min |
| Aug 11, 6:29 PM CDT | Severe Thunderstorm Warning | FGF | Cass, Traill | 56 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.