Alert archive / North Dakota / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 270, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Aug 26, 2002, 7:44 PM CDT for Walsh County, North Dakota; Becker County, Minnesota. It was in force for 46 min. 1 report 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 26, 2002, 7:44 PM CDT (00:44 UTC)
- Expired
- Aug 26, 2002, 8:30 PM CDT
- In force
- 46 min
- Issued by
- NWS Grand Forks, ND
- Area
- Counties, with a storm outline in the text
Counties Becker County, MN, Walsh County, ND
The radar
The Fargo/Grand Forks radar (KMVX), 119 km from the middle of the area, began a volume at 00:45 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 26, 8:15 PM CDT | Tornado F0 | Lake Park, MN | The tornado briefly touched down in an open field. |
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 26, 2:50 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
International Fa, MN (KINL), launched 00:00Z, 0.7 hours before the alert went out and 259 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
- 643 J/kg
- Mixed-layer CIN
- -70 J/kg
- Mixed-layer LCL
- 1520 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 86 m²/s²
- 0-3 km storm-relative helicity
- 119 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.5
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS53 KFGF 270044 SVRFAR NDC099-270130- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS 744 PM CDT MON AUG 26 2002 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... WALSH COUNTY IN NORTHEAST NORTH DAKOTA. * UNTIL 830 PM CDT. * AT 735 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 7 MILES WEST OF PISEK...OR ABOUT 22 MILES WEST OF GRAFTON...MOVEMENT WAS TO THE NORTHEAST AT 25 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... PARK RIVER AT 750 PM. REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM MONDAY EVENING FOR EASTERN NORTH DAKOTA. LAT...LON 4836 9799 4823 9780 4842 9750 4856 9771 BERG NNNN
1 follow-up statement
000 WUUS53 KFGF 270044 RRA SVRFAR MNC005-270130- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS 744 PM CDT MON AUG 26 2002 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHERN BECKER COUNTY IN NORTHWEST MINNESOTA. * UNTIL 830 PM CDT. * AT 740 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 8 MILES SOUTHWEST OF OGEMA...OR ABOUT 19 MILES NORTHWEST OF DETROIT LAKES...MOVEMENT WAS TO THE EAST AT 30 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... OGEMA AT 750 PM... CALLAWAY AT 755 PM... RICHWOOD AT 800 PM AND MANY POINT LAKE AT 825 PM. REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM MONDAY EVENING FOR EASTERN NORTH DAKOTA. LAT...LON 4714 9612 4696 9617 4688 9570 4710 9549 8 NNNN
The office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| 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 26, 11:18 PM CDT | Severe Thunderstorm Warning | FGF | Grand Forks | 42 min |
| 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 |
| Aug 27, 6:48 PM CDT | Severe Thunderstorm Warning | FGF | Cavalier, Pembina | 42 min |
| 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, 7:58 PM CDT | Tornado Warning | FGF | Becker | 47 min |
| Aug 26, 8:24 PM CDT | Severe Thunderstorm Warning | FGF | Otter Tail | 51 min |
Nearby
Severe Thunderstorm Warnings in North Dakota, 2002Severe Thunderstorm Warnings in Minnesota, 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.