Alert archive / North Dakota / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 283, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Aug 27, 2002, 8:43 PM CDT for Pembina County, Walsh County, North Dakota. It was in force for 47 min. 3 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, 8:43 PM CDT (01:43 UTC)
- Expired
- Aug 27, 2002, 9:30 PM CDT
- In force
- 47 min
- Issued by
- NWS Grand Forks, ND
- Area
- Counties, with a storm outline in the text
Counties Pembina County, ND, Walsh County, ND
The radar
The Fargo/Grand Forks radar (KMVX), 118 km from the middle of the area, began a volume at 01:42 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, 8:50 PM CDT | Hail 0.75 | St Thomas, ND | |
| Aug 27, 8:55 PM CDT | Hail 0.88 | Auburn, ND | |
| Aug 27, 9:40 PM CDT | Hail 1 | Fairdale, 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.
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
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 00:00Z, 1.7 hours before the alert went out and 304 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
- 1222 J/kg
- Mixed-layer CIN
- -5 J/kg
- Mixed-layer LCL
- 2291 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 0 m²/s²
- 0-3 km storm-relative helicity
- 31 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 27, 8:35 PM CDT, 8 minutes earlier.
Area forecast discussion, Aug 27, 8:35 PM CDT, 8 minutes before
FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 835 PM CDT TUE AUG 27 2002 FORECAST CHALLENGE AGAIN IS ONGOING SEVERE WEATHER THREAT. CURRENT WATCH IS IN EFFECT UNTIL 10 PM FOR THE NORTHERN HALF OF THE FA. LATEST SFC MAP SHOWS SFC LOW OVER SOUTHWEST ND. DRY/WARM PUNCH IN THIS AREA SHOWED UP BETTER EARLIER AS A POSSIBLE WARM FRONT FROM KBIS-KJMS-KABR (WHERE KBIS ROSE TO AROUND 90). ONE COVERGENT BOUNDARY EXTENDS FROM KBIS UP TOWARD CYWG WITH ANOTHER ONE WORKING SOUTH IN THE NORTHERN RED RIVER VALLEY. THIS LAST BOUNDARY IS WORKING INTO MORE JUICY LOW LEVEL MOISTURE BUT FURTHER FROM THE MAIN UPPER FORCING. ETA/MESOETA HINT AT A WEAK 850 MB JET DEVELOPING DURING THE 03Z-06Z TIME FRAME AND THE KMVX 88D CURRENTLY SHOWS 25 KNOTS IN THE LOWEST GATES. THE LINE FROM KBIS TO KJMS ALSO HAS BEEN PRODUCING SEVERE WEATHER AND THIS LINE CONTINUES TO MOVE TO THE EAST TOWARD THE WESTERN FRINGES OF THE FA. BOTH THESE AREAS REMAIN IN THE MOISTURE CONVERGENCE BULLSEYE AND AREA OF LOWEST LIS. SEVERE WEATHER THREAT WILL CONTINUE THROUGH THE WATCH EXPIRATION TIME AND MAY (LIKE LAST NIGHT) SEE A FEW SEVERE STORMS AFTER 10 PM. WILL HOLD OFF ON ANY UPDATE UNTIL AROUND 10 PM AS ZONES IN GOOD SHAPE. ONLY UPDATE SHOULD BE WATCH HEADLINES. .FGF...NONE. GODON
In the hours before
Local storm report, Aug 27, 3:04 PM CDT, 5 hours 39 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND FORKS, ND
304 PM CDT TUE AUG 27 2002
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0520 PM 5 N MCINTOSH MN TORNADO
08/26/02 POLK REPORTED BY PUBLIC.
0630 PM FLOM MN 2.50 INCH HAIL
08/26/02 NORMAN REPORTED BY PUBLIC.
0720 PM 1 N OGEMA MN .75 INCH HAIL
08/26/02 BECKER REPORTED BY PUBLIC.
0720 PM 1 W WAUBUN MN .75 INCH HAIL
08/26/02 MAHNOMEN REPORTED BY PUBLIC.
0220 AM 4 W LEEDS ND WIND DAMAGE
08/27/02 BENSON CROP DAMAGE. REPORTED BY
PUBLIC.
DPORTERLocal storm report, Aug 27, 5:40 PM CDT, 3 hours 3 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND FORKS, ND
540 PM CDT TUE AUG 27 2002
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0515 PM 7 SE MAIDA ND 2.50 INCH HAIL
08/27/02 CAVALIER HAILED 20 MINUTES
UNTIL 525 PM CDT
GROUND WHITELocal storm report, Aug 27, 6:15 PM CDT, 2 hours 28 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND FORKS, ND
615 PM CDT TUE AUG 27 2002
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0515 PM 7 SE MAIDA ND 2.50 INCH HAIL
08/27/02 CAVALIER HAILED 20 MINUTES
UNTIL 525 PM CDT
GROUND WHITE
0557 PM 1 NW WALHALLA ND .75 INCH HAIL
08/27/02 PEMBINA HAILED UNTIL 602 PM
0605 PM 6 E VANG ND 1.75 INCH HAIL
08/27/02 CAVALIER GROUND WHITELocal storm report, Aug 27, 7:20 PM CDT, 1 hour 23 minutes before
PRELIMINARY LOCAL STORM REPORT...EVENT SUMMARY
NATIONAL WEATHER SERVICE GRAND FORKS, ND
720 PM CDT TUE AUG 27 2002
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0515 PM 7 SE MAIDA ND 2.50 INCH HAIL
08/27/02 CAVALIER HAILED 20 MINUTES
UNTIL 525 PM CDT
GROUND WHITE
0557 PM 1 NW WALHALLA ND .75 INCH HAIL
08/27/02 PEMBINA HAILED UNTIL 602 PM
0605 PM 6 E VANG ND 1.75 INCH HAIL
08/27/02 CAVALIER GROUND WHITE
0615 PM 2 SE WALHALLA ND 1.00 INCH HAIL
08/27/02 PEMBINA GROUND WHITE
0634 PM 6 NW CAVALIER ND .75 INCH HAIL
08/27/02 PEMBINA
0648 PM 3 W CAVALIER ND 1.00 INCH HAIL
08/27/02 PEMBINA
0655 PM 10 E LANGDON ND .75 INCH HAIL
08/27/02 CAVALIERLocal storm report, Aug 27, 8:40 PM CDT, 3 minutes before
PRELIMINARY LOCAL STORM REPORT...EVENT SUMMARY
NATIONAL WEATHER SERVICE GRAND FORKS, ND
840 PM CDT TUE AUG 27 2002
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0515 PM 7 SE MAIDA ND 2.50 INCH HAIL
08/27/02 CAVALIER HAILED 20 MINUTES
UNTIL 525 PM CDT
GROUND WHITE
0557 PM 1 NW WALHALLA ND .75 INCH HAIL
08/27/02 PEMBINA HAILED UNTIL 602 PM
0605 PM 6 E VANG ND 1.75 INCH HAIL
08/27/02 CAVALIER GROUND WHITE
0615 PM 2 SE WALHALLA ND 1.00 INCH HAIL
08/27/02 PEMBINA GROUND WHITE
0634 PM 6 NW CAVALIER ND .75 INCH HAIL
08/27/02 PEMBINA
0648 PM 3 W CAVALIER ND 1.00 INCH HAIL
08/27/02 PEMBINA
0655 PM 10 E LANGDON ND .75 INCH HAIL
08/27/02 CAVALIER
0755 PM 3 SW GLASSTON ND .75 INCH HAIL
08/27/02 PEMBINA
0805 PM 3 NE FAIRDALE ND .75 INCH HAIL
08/27/02 WALSH
0824 PM 3.5 S ST THOMAS ND .75 INCH HAIL
08/27/02 PEMBINAThe office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 27, 7:47 PM CDT | Severe Thunderstorm Warning | FGF | Marshall | 58 min |
| Aug 27, 11:18 PM CDT | Flash Flood Warning | FGF | Marshall | 6 hr |
| Aug 28, 1:15 PM CDT | Severe Thunderstorm Warning | FGF | Clearwater | 45 min |
| Aug 28, 1:44 PM CDT | Severe Thunderstorm Warning | FGF | Becker | 46 min |
| Aug 28, 2:00 PM CDT | Severe Thunderstorm Warning | FGF | Clearwater, Hubbard | 45 min |
| Aug 28, 4:30 PM CDT | Severe Thunderstorm Warning | FGF | Wilkin | 45 min |
| Aug 28, 4:44 PM CDT | Severe Thunderstorm Warning | FGF | Clay | 46 min |
| Aug 28, 5:01 PM CDT | Tornado Warning | FGF | Wilkin | 44 min |
| Aug 28, 5:09 PM CDT | Severe Thunderstorm Warning | FGF | Becker, Mahnomen | 51 min |
| Aug 28, 5:27 PM CDT | Severe Thunderstorm Warning | FGF | Otter Tail | 48 min |
| Aug 28, 5:29 PM CDT | Severe Thunderstorm Warning | FGF | Clay | 46 min |
| Aug 28, 5:47 PM CDT | Tornado Warning | FGF | Wilkin | 43 min |
| Aug 28, 6:00 PM CDT | Severe Thunderstorm Warning | FGF | Becker, Mahnomen | 60 min |
| Aug 28, 6:14 PM CDT | Flash Flood Warning | FGF | Wilkin | 6 hr |
| Aug 28, 6:16 PM CDT | Flash Flood Warning | FGF | Wilkin | 6 hr |
| Aug 28, 6:16 PM CDT | Severe Thunderstorm Warning | FGF | Clay | 59 min |
| Aug 28, 6:57 PM CDT | Flash Flood Warning | FGF | Becker, Clay, Mahnomen | 6 hr |
| Aug 27, 8:58 PM CDT | Severe Thunderstorm Warning | FGF | Towner | 47 min |
| Aug 27, 9:14 PM CDT | Severe Thunderstorm Warning | FGF | Cavalier | 46 min |
| Aug 27, 9:35 PM CDT | Severe Thunderstorm Warning | FGF | Walsh | 40 min |
| Aug 27, 10:13 PM CDT | Severe Thunderstorm Warning | FGF | Walsh | 47 min |
| Aug 27, 10:29 PM CDT | Flash Flood Warning | FGF | Walsh | 4 hr |
| Aug 27, 10:43 PM CDT | Severe Thunderstorm Warning | FGF | Towner | 47 min |
| Aug 27, 10:57 PM CDT | Severe Thunderstorm Warning | FGF | Walsh | 48 min |
| Aug 28, 5:20 PM CDT | Severe Thunderstorm Warning | FGF | Steele, Traill | 40 min |
| Aug 28, 5:55 PM CDT | Severe Thunderstorm Warning | FGF | Cass | 35 min |
| Aug 28, 6:44 PM CDT | Severe Thunderstorm Warning | FGF | Cass | 61 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.