Alert archive / Minnesota / Tornado Warnings in 2002
Tornado Warning 19, NWS Grand Forks, ND
NWS Grand Forks, ND issued this tornado warning at Aug 11, 2002, 7:56 PM CDT for Mahnomen County, Norman County, Minnesota. It was in force for 49 min. 3 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, 7:56 PM CDT (00:56 UTC)
- Expired
- Aug 11, 2002, 8:45 PM CDT
- In force
- 49 min
- Issued by
- NWS Grand Forks, ND
- Area
- Counties, with a storm outline in the text
Counties Mahnomen County, MN, Norman County, MN
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 11, 8:00 PM CDT | Thunderstorm Wind | Bejou, MN | Branches were blown down. |
| Aug 11, 8:00 PM CDT | Thunderstorm Wind | Ranum, MN | Large trees were blown down. |
| Aug 11, 8:05 PM CDT | Tornado F0 | Bejou, MN | A brief touchdown pulled up tin on a barn roof. |
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, 6:45 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
International Fa, MN (KINL), launched 00:00Z, 0.9 hours before the alert went out and 236 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
- 204 J/kg
- Mixed-layer CIN
- -162 J/kg
- Mixed-layer LCL
- 1684 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 40 m²/s²
- 0-3 km storm-relative helicity
- 139 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
As transmitted, in the capitals the NWS used until 2016.
542 WFUS53 KFGF 120056 TORFAR MNC087-107-120145- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS 756 PM CDT SUN AUG 11 2002 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * TORNADO WARNING FOR... MAHNOMEN COUNTY IN NORTHWEST MINNESOTA AND NORTHEASTERN NORMAN COUNTY IN NORTHWEST MINNESOTA. * UNTIL 845 PM CDT. * AT 750 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM WITH STRONG ROTATION 3 MILES SOUTHWEST OF RANUM...OR ABOUT 44 MILES NORTH OF DETROIT LAKES...MOVEMENT WAS TO THE EAST AT 45 MPH. * THE TORNADO WILL BE NEAR... BEJOU AT 800 PM... BEAULIEU AT 810 PM AND ISLANDLAKE AT 820 PM. THIS IS A DANGEROUS STORM. IF YOU ARE IN THE PATH OF THIS TORNADO ABANDON CARS AND MOBILE HOMES FOR A STURDY BUILDING. LAT...LON 4750 9622 4732 9618 4730 9563 4749 9557 DTR NNNN
The office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 11, 7:12 PM CDT | Severe Thunderstorm Warning | FGF | Clay, Norman | 48 min |
| Aug 11, 7:51 PM CDT | Severe Thunderstorm Warning | FGF | Becker, Clearwater, Mahnomen | 54 min |
| Aug 11, 8:37 PM CDT | Severe Thunderstorm Warning | FGF | Polk | 23 min |
| Aug 11, 8:46 PM CDT | Severe Thunderstorm Warning | FGF | Becker, Beltrami, Clearwater, Hubbard | 59 min |
| Aug 11, 8:53 PM CDT | Tornado Warning | FGF | Beltrami, Clearwater, Hubbard | 52 min |
| Aug 11, 9:37 PM CDT | Severe Thunderstorm Warning | FGF | Otter Tail, Wadena | 38 min |
| Aug 11, 11:15 PM CDT | Severe Thunderstorm Warning | FGF | Grant | 45 min |
| Aug 12, 12:19 AM CDT | Severe Thunderstorm Warning | FGF | Otter Tail | 56 min |
Nearby
Tornado Warnings in Minnesota, 2002Every tornado warning in 2002Tornadoes 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.