Alert archive / Minnesota / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 348, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Aug 21, 2001, 10:59 PM CDT for Kittson 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 the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties, with what was reported inside it.
The facts
- Issued
- Aug 21, 2001, 10:59 PM CDT (03:59 UTC)
- Expired
- Aug 21, 2001, 11:45 PM CDT
- In force
- 46 min
- Issued by
- NWS Grand Forks, ND
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Kittson County, MN
The radar
The Fargo/Grand Forks radar (KMVX), 162 km from the middle of the area, began a volume at 03:59 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 21, 11:15 PM CDT | Thunderstorm Wind | Orleans, MN | Branches were blown down. |
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
International Fa, MN (KINL), launched 00:00Z, 4.0 hours before the alert went out and 260 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
- 1043 J/kg
- Mixed-layer CIN
- -104 J/kg
- Mixed-layer LCL
- 1232 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 59 m²/s²
- 0-3 km storm-relative helicity
- 81 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 3.6
The text
As transmitted, in the capitals the NWS used until 2016.
519 WUUS53 KFGF 220359 SVRFAR MNC069-220445- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE EASTERN ND-GRAND FORKS 1059 PM CDT TUE AUG 21 2001 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... KITTSON COUNTY IN NORTHWEST MINNESOTA. * UNTIL 1145 PM CDT. * AT 1053 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 10 MILES NORTH OF ORLEANS...OR ABOUT 49 MILES NORTH OF GRAFTON...MOVEMENT WAS TO THE SOUTHEAST AT 40 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... ORLEANS AT 1105 PM... LANCASTER AT 1115 PM... LAKE BRONSON AT 1135 PM AND HALMA AT 1140 PM. REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. LAT...LON 4917 9695 4905 9715 4857 9657 4873 9637 $$ BERG NNNN
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Grand Forks, ND wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 21, 8:20 PM CDT, 2 hours 39 minutes earlier.
Area forecast discussion, Aug 21, 8:20 PM CDT, 2 hours 39 minutes before
FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 820 PM CDT TUE AUG 21 2001 .CURRENT OBSERVATIONAL OVERVIEW... 00Z MSAS ANALYSIS DEPICTED RATHER DIFFUSE AND BENIGN PRESSURE PATTERN OVER REGION WITH LOW PRESSURE OVER CENTRAL SOUTH DAKOTA AND ASSOCIATED INVERTED TROUGH AXIS NORTH INTO WESTERN NORTH DAKOTA. LATEST RADAR MOSAIC INDICATED WIDELY SCATTERED THUNDERSTORMS FIRING IN HIGHLY UNSTABLE ENVIRONMENT FROM JUST WEST OF LANGDON TO SOUTHEAST OF MINOT. .FORECAST DETAILS... EXPECT ACTIVITY TO WEAKEN AFTER DARK CHECK SPC MESOSCALE DISCUSSION FOR FURTHER DETAILS. WILL UPDATE ZONES BY LATE EVENING TO ADDRESS CONVECTIVE TRENDS...OTHERWISE NO MAJOR REVISIONS PLANNED. .FGF...NONE. BERG
In the hours before
Local storm report, Aug 21, 9:00 PM CDT, 1 hour 59 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN NORTH DAKOTA/GRAND FORKS
900 PM CDT TUE AUG 21 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0815 PM 13 E HANSBORO ND 1.75 INCH HAIL
08/21/01 TOWNER GOLFBALL SIZED HAIL
0820 PM 14 SE HANSBORO ND 1.75 INCH HAIL
08/21/01 TOWNER GOLF BALL SIZED HAIL
0830 PM 2 NW CALVIN ND .75 INCH HAIL
08/21/01 CAVALIER PENNY SIZED HAIL
NNNNThe office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 22, 12:45 AM CDT | Severe Thunderstorm Warning | FGF | Kittson | 60 min |
| Aug 22, 1:44 AM CDT | Severe Thunderstorm Warning | FGF | Kittson | 61 min |
Nearby
Severe Thunderstorm Warnings in Minnesota, 2001Every severe thunderstorm warning in 2001
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.