Alert archive / Minnesota / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 248, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Aug 23, 2002, 8:14 PM CDT for Polk County, Minnesota. It was in force for 46 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 23, 2002, 8:14 PM CDT (01:14 UTC)
- Expired
- Aug 23, 2002, 9:00 PM CDT
- In force
- 46 min
- Issued by
- NWS Grand Forks, ND
- Area
- Counties, with a storm outline in the text
County Polk County, MN
The radar
The Fargo/Grand Forks radar (KMVX), 55 km from the middle of the area, began a volume at 01:17 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.
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 nearest sounding before it
International Fa, MN (KINL), launched 00:00Z, 1.2 hours before the alert went out and 273 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
- 889 J/kg
- Mixed-layer CIN
- -7 J/kg
- Mixed-layer LCL
- 1340 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- 12 m²/s²
- 0-3 km storm-relative helicity
- 19 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
432 WUUS53 KFGF 240114 SVRFAR MNC119-240200- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS 815 PM CDT FRI AUG 23 2002 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... WESTERN POLK COUNTY IN NORTHWEST MINNESOTA. * UNTIL 900 PM CDT. * AT 812 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 11 MILES NORTHWEST OF MALLORY...OR ABOUT 4 MILES NORTHWEST OF GRAND FORKS...MOVEMENT WAS TO THE EAST AT 30 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... MALLORY AT 830 PM... DAVIDSON AT 835 PM... KEY WEST AT 840 PM AND FISHER AT 845 PM. REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. LAT...LON 4805 9703 4777 9692 4763 9667 4797 9654 08 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 23, 1:09 PM CDT, 7 hours 5 minutes earlier.
Area forecast discussion, Aug 23, 1:09 PM CDT, 7 hours 5 minutes before
FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 109 PM CDT FRI AUG 23 2002 ...FORECAST CHALLENGE WILL BE PRECIPITATION CHANCES OVERNIGHT... .CURRENT OBSERVATIONS... WEAK SURFACE FRONT LOCATED WELL NORTH OF THE BORDER AND IS SLOWLY MOVING SOUTH. SHORT WAVE EVIDENT ON WATER VAPOR IMAGERY ALONG AND AHEAD OF FRONT. A FEW LIGHTNING STRIKES HAVE BEEN NOTED ALONG FRONT. DEWPOINTS ACROSS AREA REMAIN IN THE MID 60S WITH ALL MODELS UNDERDOING THE LOW LEVEL MOISTURE. .SHORT TERM... MAIN CHALLENGE IS THUNDER OVERNIGHT. SOME LOW LEVEL MOISTURE PRESENT BUT LIMITED ABOVE THIS LAYER. SOME WEAK SURFACE/850MB CONVERGENCE AND INSTABILITY TONIGHT. WILL PUT ISOLATED MENTION ACROSS MUCH OF THE FORECAST AREA(FA) WITH SLIGHTLY HIGHER POPS ACROSS NORTHWEST MINNESOTA. .MID TERM... WEAK SURFACE HIGH WILL PUSH FRONT SOUTH OF FA ON SATURDAY AND WILL KEEP PRECIPITATION OUT OF THE REGION UNTIL SUNDAY NIGHT. BY SUNDAY NIGHT...UPPER LEVEL LOW EJECTS OUT OF THE PACIFIC NORTHWEST AND INTO THE NORTHERN HIGH PLAINS. SEVERAL WAVES EXPECTED TO ROTATE AROUND SYSTEM AND WILL BRING CHANCE OF THUNDERSTORMS TO THE RED RIVER VALLEY AND AREAS WEST INTO MONDAY...HOWEVER MOISTURE WILL BE LIMITED WITH A BLOCKING PATTERN TO THE SOUTH. .EXTENDED FORECAST... ECMWF IS ODD MODEL OUT IS SHOWING AMPLIFYING UPR LOW AND COLD AIR DROPPING SOUTHEAST TOWARD NRN MN BY 12Z THU. NCEP ENSEMBLES/NOGAPS/MRF/CANADIAN ALL GO AGAINST THIS SHOWING MAIN POLAR JET AND COLD AIR WELL NORTH ACROSS NRN CANADA WITH MUCH WEAKER 50H SYSTEMS DROPPING THRU NRN PLAINS TUE-WED TIME FRAME. CANADIAN AND NOGAPS ARE EVEN WEAKER THAN THE MRF AND WOULD IMPLY ONLY SMALL CHANCES OF PCPN TUE-WED VERSUS HEAVIER QPF OF MRF. BELIEVE THIS MAY BE RIGHT. WILL HOWEVER STILL KEEP CHC IN PER CURRENT EXTENDED FOR TUE-WED...THEN DRY THU-FRI AND STILL MILD WITH NEAR NORMAL TEMPS. .FGF...NONE DONAVON/RIDDLE
In the hours before
Local storm report, Aug 23, 6:40 PM CDT, 1 hour 34 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND FORKS, ND
640 PM CDT FRI AUG 23 2002
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0635 PM 2 E MOUNTAIN ND 2.00 INCH HAIL
08/23/02 PEMBINA REPORTED BY CO-OP
OBSERVER.
DPORTERLocal storm report, Aug 23, 6:53 PM CDT, 1 hour 21 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND FORKS, ND
653 PM CDT FRI AUG 23 2002
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0600 PM 2 NE CONCRETE ND .88 INCH HAIL
08/23/02 PEMBINA REPORTED BY PUBLIC.
0615 PM 5 NW BISBEE ND .75 INCH HAIL
08/23/02 TOWNER HAIL FELL FOR 15 MINUTES
DPORTERLocal storm report, Aug 23, 6:56 PM CDT, 1 hour 18 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND FORKS, ND
656 PM CDT FRI AUG 23 2002
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0650 PM 2 NW CRYSTAL ND 1.75 INCH HAIL
08/23/02 PEMBINA REPORTED BY CO-OP
OBSERVER.
DPORTERLocal storm report, Aug 23, 7:08 PM CDT, 1 hour 6 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND FORKS, ND
708 PM CDT FRI AUG 23 2002
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0702 PM HOOPLE ND .75 INCH HAIL
08/23/02 WALSH REPORTED BY FIRE
DEPARTMENT.
DPORTERLocal storm report, Aug 23, 7:23 PM CDT, 51 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND FORKS, ND
723 PM CDT FRI AUG 23 2002
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0720 PM HALLOCK MN WIND DAMAGE
08/23/02 KITTSON 3 INCH DIAMETER BRANCHES
DOWN. SHINGLES BLOWN OFF
COMMERCIAL BUILDINGS.
ESTIMATED 60 MPH WINDS.
REPORTED BY LAW
ENFORCEMENT.
DPORTERLocal storm report, Aug 23, 7:50 PM CDT, 24 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND FORKS, ND
750 PM CDT FRI AUG 23 2002
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0721 PM HALLOCK MN WIND DAMAGE
08/23/02 KITTSON POWER POLES BUSTED...EIGHT
INCH DIAMETER TREES
DOWN...TWO ROOFS LIFTED.
REPORTED BY LAW
ENFORCEMENT.
DPORTERThe office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 23, 7:12 PM CDT | Severe Thunderstorm Warning | FGF | Kittson | 48 min |
| Aug 23, 7:28 PM CDT | Severe Thunderstorm Warning | FGF | Roseau | 47 min |
| Aug 23, 8:49 PM CDT | Severe Thunderstorm Warning | FGF | Marshall | 26 min |
| Aug 23, 9:00 PM CDT | Severe Thunderstorm Warning | FGF | Pennington | 45 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.