Alert archive / North Dakota / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 281, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Aug 27, 2002, 6:48 PM CDT for Cavalier County, Pembina County, North Dakota. It was in force for 42 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 27, 2002, 6:48 PM CDT (23:48 UTC)
- Expired
- Aug 27, 2002, 7:30 PM CDT
- In force
- 42 min
- Issued by
- NWS Grand Forks, ND
- Area
- Counties, with a storm outline in the text
Counties Cavalier County, ND, Pembina County, ND
The radar
The Fargo/Grand Forks radar (KMVX), 147 km from the middle of the area, began a volume at 23:50 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 27, 6:48 PM CDT | Hail 1 | Cavalier, ND | |
| Aug 27, 6:55 PM CDT | Hail 0.75 | Langdon, 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 27, 4:40 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 12:00Z, 11.8 hours before the alert went out and 300 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
- 668 J/kg
- Mixed-layer CIN
- -155 J/kg
- Mixed-layer LCL
- 1358 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 25 m²/s²
- 0-3 km storm-relative helicity
- 50 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.2
The office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 26, 7:14 PM CDT | Severe Thunderstorm Warning | FGF | Lake of the Woods | 46 min |
| Aug 26, 7:38 PM CDT | Tornado Warning | FGF | Clay | 52 min |
| Aug 26, 7:44 PM CDT | Severe Thunderstorm Warning | FGF | Becker | 46 min |
| Aug 26, 7:58 PM CDT | Tornado Warning | FGF | Becker | 47 min |
| Aug 26, 8:24 PM CDT | Severe Thunderstorm Warning | FGF | Otter Tail | 51 min |
| Aug 26, 11:18 PM CDT | Severe Thunderstorm Warning | FGF | Polk | 42 min |
| Aug 26, 7:49 PM CDT | Severe Thunderstorm Warning | FGF | Pembina | 41 min |
| Aug 26, 8:08 PM CDT | Flash Flood Warning | FGF | Walsh | 6 hr |
| Aug 27, 12:26 AM CDT | Severe Thunderstorm Warning | FGF | Benson | 49 min |
| Aug 27, 1:33 AM CDT | Severe Thunderstorm Warning | FGF | Ramsey | 42 min |
| Aug 27, 2:07 AM CDT | Severe Thunderstorm Warning | FGF | Benson | 38 min |
| Aug 27, 3:34 AM CDT | Flash Flood Warning | FGF | Benson, Ramsey | 6 hr |
| Aug 27, 10:05 AM CDT | Severe Thunderstorm Warning | FGF | Cavalier | 55 min |
| Aug 27, 5:23 PM CDT | Severe Thunderstorm Warning | FGF | Cavalier, Pembina | 37 min |
| Aug 27, 5:58 PM CDT | Severe Thunderstorm Warning | FGF | Cavalier, Pembina | 47 min |
| Aug 27, 6:34 PM CDT | Severe Thunderstorm Warning | FGF | Cavalier, Pembina | 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; radar from the NEXRAD Level II archive.