Alert archive / Minnesota / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 320, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Aug 31, 2002, 8:53 PM CDT for Kittson County, Minnesota; Pembina County, North Dakota. It was in force for 52 min. 2 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Aug 31, 2002, 8:53 PM CDT (01:53 UTC)
- Expired
- Aug 31, 2002, 9:45 PM CDT
- In force
- 52 min
- Issued by
- NWS Grand Forks, ND
- Area
- Counties, with a storm outline in the text
Counties Kittson County, MN, Pembina County, ND
The radar
The Fargo/Grand Forks radar (KMVX), 139 km from the middle of the area, began a volume at 01:53 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 31, 9:05 PM CDT | Hail 0.75 | Humboldt, MN | |
| Aug 31, 9:34 PM CDT | Hail 1 | Walhalla, 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 31, 7:00 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
International Fa, MN (KINL), launched 00:00Z, 1.9 hours before the alert went out and 285 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
- 2440 J/kg
- Mixed-layer CIN
- -13 J/kg
- Mixed-layer LCL
- 988 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 140 m²/s²
- 0-3 km storm-relative helicity
- 180 m²/s²
- Significant tornado parameter
- 1.4
- Supercell composite
- 6.5
The office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 31, 11:46 PM CDT | Severe Thunderstorm Warning | FGF | Clay | 44 min |
| Sep 1, 12:02 AM CDT | Severe Thunderstorm Warning | FGF | Marshall | 43 min |
| Sep 1, 12:20 AM CDT | Severe Thunderstorm Warning | FGF | Polk | 40 min |
| Sep 1, 12:24 AM CDT | Severe Thunderstorm Warning | FGF | Pennington, Red Lake | 51 min |
| Sep 1, 12:52 AM CDT | Severe Thunderstorm Warning | FGF | Norman, Polk | 38 min |
| Sep 1, 1:16 AM CDT | Severe Thunderstorm Warning | FGF | Roseau | 29 min |
| Sep 1, 1:50 AM CDT | Severe Thunderstorm Warning | FGF | Beltrami | 40 min |
| 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, 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, 12:28 AM CDT | Severe Thunderstorm Warning | FGF | Sargent | 47 min |
| Sep 1, 1:19 AM CDT | Severe Thunderstorm Warning | FGF | Richland | 41 min |
Nearby
Severe Thunderstorm Warnings in Minnesota, 2002Severe 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; radar from the NEXRAD Level II archive.