Alert archive / Minnesota / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 13, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Apr 23, 2002, 11:36 PM CDT for Clay County, Norman County, Minnesota. It was in force for 39 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
- Apr 23, 2002, 11:36 PM CDT (04:36 UTC)
- Expired
- Apr 24, 2002, 12:15 AM CDT
- In force
- 39 min
- Issued by
- NWS Grand Forks, ND
- Area
- Counties, with a storm outline in the text
Counties Clay County, MN, Norman County, MN
The radar
The Fargo/Grand Forks radar (KMVX), 72 km from the middle of the area, began a volume at 04:37 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 |
|---|---|---|---|
| Apr 24, 12:00 AM CDT | Thunderstorm Wind | Felton, MN | A stack of large round haybales was scattered in the strong wind. |
| Apr 24, 12:13 AM CDT | Thunderstorm Wind 56 M | Ada, MN | A 65 mph wind gust was measured by a MNDOT RWIS near Ada. |
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 nearest sounding before it
Aberdeen, SD (KABR), launched 00:00Z, 4.6 hours before the alert went out and 281 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
- 12 J/kg
- Mixed-layer CIN
- -80 J/kg
- Mixed-layer LCL
- 2701 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 27 m²/s²
- 0-3 km storm-relative helicity
- 124 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
458 WUUS53 KFGF 240436 SVRFAR MNC027-107-240515- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS 1136 PM CDT TUE APR 23 2002 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHERN CLAY COUNTY IN NORTHWEST MINNESOTA AND SOUTHERN NORMAN COUNTY IN NORTHWEST MINNESOTA. * UNTIL 1215 AM CDT. * AT 1132 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 9 MILES SOUTHWEST OF FELTON...OR ABOUT 8 MILES NORTHEAST OF DILWORTH...MOVEMENT WAS TO THE NORTHEAST AT 35 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... FELTON AT 1145 PM... BORUP AT 1155 PM... ADA AT 1205 AM AND TWIN VALLEY AT 1215 AM. REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. LAT...LON 4700 9680 4687 9662 4727 9618 4735 9665 06 NNNN
The office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 23, 7:32 PM CDT | Severe Thunderstorm Warning | FGF | Polk | 43 min |
| Apr 23, 8:04 PM CDT | Severe Thunderstorm Warning | FGF | Pennington, Red Lake | 41 min |
| Apr 23, 8:42 PM CDT | Severe Thunderstorm Warning | FGF | Marshall, Pennington | 48 min |
| Apr 23, 9:49 PM CDT | Severe Thunderstorm Warning | FGF | Marshall | 41 min |
| Apr 24, 12:34 AM CDT | Severe Thunderstorm Warning | FGF | Polk | 26 min |
Nearby
Severe 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.