Alert archive / Minnesota / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 184, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Aug 8, 2002, 8:56 PM CDT for Polk County, Minnesota. It was in force for 49 min. 1 report 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 8, 2002, 8:56 PM CDT (01:56 UTC)
- Expired
- Aug 8, 2002, 9:45 PM CDT
- In force
- 49 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), 62 km from the middle of the area, began a volume at 01:58 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 8, 9:10 PM CDT | Hail 0.88 | East Grand Forks, MN |
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 8, 3:10 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 8, 8:50 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 00:00Z, 1.9 hours before the alert went out and 318 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
- 863 J/kg
- Mixed-layer CIN
- -27 J/kg
- Mixed-layer LCL
- 1927 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 20 m²/s²
- 0-3 km storm-relative helicity
- 49 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.7
The text
As transmitted, in the capitals the NWS used until 2016.
074 WUUS53 KFGF 090156 SVRFAR MNC119-090245- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS 856 PM CDT THU AUG 8 2002 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHWESTERN POLK COUNTY IN NORTHWEST MINNESOTA. * UNTIL 945 PM CDT. * AT 853 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 4 MILES NORTHWEST OF MALLORY...OR ABOUT 4 MILES EAST OF GRAND FORKS...MOVEMENT WAS TO THE NORTHEAST AT 30 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... DAVIDSON AT 900 PM... KEY WEST AT 910 PM... SHERACK AT 925 PM AND EUCLID AT 930 PM. REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM THURSDAY EVENING FOR NORTHWESTERN MINNESOTA AND EASTERN NORTH DAKOTA. LAT...LON 4803 9705 4779 9692 4799 9654 4816 9690 8 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 8, 3:25 PM CDT, 5 hours 31 minutes earlier.
Area forecast discussion, Aug 8, 3:25 PM CDT, 5 hours 31 minutes before
FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 325 PM CDT THU AUG 8 2002 FORECAST CHALLENGE FOR TODAY IS PRECIPITATION. LATEST SATELLITE IMAGERY SHOWS CLOUDS MAINLY OVER ND SIDE. KMVX HAS CLUSTER OF SEVERE THUNDERSTORMS IN DVL AREA WITH ADDITIONAL PRECIPITATION EXTENDING ALONG W EDGE OF AREA. CURRENT MSAS SURFACE ANALYSIS SHOWS SURFACE LOW CENTERED IN S MB...WITH FRONT EXTENDING THROUGH ND ALONG A DVL-JMS-MBG LINE. WHEN COMPARING MSAS DATA TO MODEL INITIALIZATIONS...NGM AND ETA BETTER MATCH THAN AVN...WITH AVN A TAD MORE PROGRESSIVE. HOWEVER...MODELS VARY QUITE A BIT ON HOW UPPER LEVEL LOW WILL TRAVERSE THROUGH AREA AND AMOUNTS OF QPF ACCOMPANYING IT. CONSEQUENTLY...STUCK CLOSEST TO ETA TIMING...BUT UTILIZED AVN FOR QPF COMPROMISE. WITH LIFTED INDICES DOWN TO -9 AND A GOOD SURFACE MOISTURE FLUX CONVERGENCE AREA ALONG AND AHEAD OF TROF IN E ND...EXPECT THUNDERSTORMS...SOME SEVERE WITH HEAVY RAIN TO DEVELOP SHORTLY AND CONTINUE THROUGH MUCH OF THE EVENING. AS A RESULT...WILL KEEP FLOOD WATCH FOR TONIGHT AND PARTS OF MN FOR FRI. IN ADDITION...SEVERE THUNDERSTORM WATCH HAS BEEN ISSUED FOR E ND AND PARTS OF NW MN UNTIL 9 PM TONIGHT. UPPER LEVEL LOW FINALLY MOVES E OF AREA SAT NIGHT...ALLOWING UPPER LEVEL RIDGE TO BRIEFLY BUILD IN OVER AREA FOR SAT NIGHT AND SUN. EXTENDED...ENSEMBLES AND 12Z AVN LEAN TOWARD A SLOWER SOLUTION THAN OPERATIONAL MRF FOR UPPER LOW MOVING SOUTH THROUGH MANITOBA. UPPER LOW WILL DRAW MUCH COOLER WEATHER INTO THE N PLAINS FOR THE FIRST PART OF THE WEEK WITH HINTS OF +4-6C TEMPERATURES AT 850MB INVADING THE REGION. EXPECT COOL AND SHOWERY DAY ON MON WITH LINGERING ACTIVITY INTO TUE. SYSTEM SWINGS TOWARD THE NE BY MID WEEK WITH GRADUAL WARMUP TO FOLLOW. TEMPERATURES WILL BE BELOW SEASONAL AVERAGES DURING THE PERIOD. .FGF...FLOOD WATCH FOR ALL OF AREA TONIGHT...AND FOR PARTS OF NW AND WC MN FOR FRI. SEVERE THUNDERSTORM WATCH ALL OF E ND AND PARTS OF NW AND WC MN UNTIL 9 PM TONIGHT. NG
In the hours before
Local storm report, Aug 8, 7:22 PM CDT, 1 hour 34 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND FORKS, ND
722 PM CDT THU AUG 8 2002
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0305 PM 4 NW SOUTHAM ND .75 INCH HAIL
08/08/02 RAMSEY
0330 PM 3 W BARTLET ND .88 INCH HAIL
08/08/02 RAMSEY
0415 PM 8 W VALLEY CITY ND 1.00 INCH HAIL
08/08/02 BARNES
0450 PM FINLEY ND WIND DAMAGE
08/08/02 STEELE BUILDING UNDER
CONSTRUCTION COLAPSED.
ESTIMATED 75 MPH WINDS.
0450 PM FINLEY ND .75 INCH HAIL
08/08/02 STEELE
0515 PM COLGATE ND .75 INCH HAIL
08/08/02 STEELE
0530 PM 7 E HOPE ND .88 INCH HAIL
08/08/02 STEELE
0542 PM 1 S EMERADO ND .75 INCH HAIL
08/08/02 GRAND FORKS
0542 PM 1 S EMERADO ND 60 MPH WIND GUST
08/08/02 GRAND FORKS
0550 PM 7 E GRAND FORKS AFB ND .75 INCH HAIL
08/08/02 GRAND FORKS
0555 PM GRAND FORKS ND .88 INCH HAIL
08/08/02 GRAND FORKS @ FGF WFO.
0555 PM GRAND FORKS ND 59 MPH WIND GUST
08/08/02 GRAND FORKS @ FGF WFO.
0600 PM 6 W GRAND FORKS ND 62 MPH WIND GUST
08/08/02 GRAND FORKS @ KGFK AIRPORT.
0605 PM EAST GRAND FORKS MN WIND DAMAGE
08/08/02 POLK TREE DAMAGE, 4-5 DIA.
0625 PM 6 S BLABON ND .75 INCH HAIL
08/08/02 STEELE
0625 PM 6 S BLABON ND 60 MPH WIND GUST
08/08/02 STEELE
0645 PM 6 NE HOPE ND 1.00 INCH HAIL
08/08/02 STEELELocal storm report, Aug 8, 8:06 PM CDT, 50 minutes before
PRELIMINARY LOCAL STORM REPORT...CORRECTED...
NATIONAL WEATHER SERVICE GRAND FORKS, ND
806 PM CDT THU AUG 8 2002
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0305 PM 4 NW SOUTHAM ND .75 INCH HAIL
08/08/02 RAMSEY
0330 PM 3 W BARTLET ND .88 INCH HAIL
08/08/02 RAMSEY
0415 PM 8 W VALLEY CITY ND 1.00 INCH HAIL
08/08/02 BARNES
0450 PM FINLEY ND WIND DAMAGE
08/08/02 STEELE BUILDING UNDER
CONSTRUCTION COLAPSED
ESTIMATED 75 MPH WINDS
0450 PM FINLEY ND .75 INCH HAIL
08/08/02 STEELE
0515 PM COLGATE ND .75 INCH HAIL
08/08/02 STEELE
0530 PM 7 E HOPE ND .88 INCH HAIL
08/08/02 STEELE
0542 PM 1 S EMERADO ND .75 INCH HAIL
08/08/02 GRAND FORKS
0542 PM 1 S EMERADO ND 60 MPH WIND GUST
08/08/02 GRAND FORKS
0550 PM 7 E GRAND FORKS AFB ND .75 INCH HAIL
08/08/02 GRAND FORKS
0555 PM GRAND FORKS ND .88 INCH HAIL
08/08/02 GRAND FORKS FGF WFO
0555 PM GRAND FORKS ND 59 MPH WIND GUST
08/08/02 GRAND FORKS FGF WFO
0600 PM 6 W GRAND FORKS ND 62 MPH WIND GUST
08/08/02 GRAND FORKS KGFK AIRPORT
0605 PM EAST GRAND FORKS MN WIND DAMAGE
08/08/02 POLK TREE DAMAGE...4-5 INCH DIA
0625 PM 6 S BLABON ND .75 INCH HAIL
08/08/02 STEELE
0625 PM 6 S BLABON ND 60 MPH WIND GUST
08/08/02 STEELE
0645 PM 6 NW HOPE ND 1.00 INCH HAIL
08/08/02 STEELEThe office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 8, 7:19 PM CDT | Severe Thunderstorm Warning | FGF | Roseau | 41 min |
| Aug 8, 7:31 PM CDT | Severe Thunderstorm Warning | FGF | Polk | 44 min |
| Aug 8, 8:12 PM CDT | Tornado Warning | FGF | Polk | 48 min |
| Aug 8, 9:59 PM CDT | Severe Thunderstorm Warning | FGF | Marshall | 46 min |
| Aug 8, 10:13 PM CDT | Severe Thunderstorm Warning | FGF | Beltrami, Lake of the Woods | 47 min |
| Aug 8, 10:51 PM CDT | Severe Thunderstorm Warning | FGF | Kittson | 39 min |
| Aug 9, 12:08 AM CDT | Severe Thunderstorm Warning | FGF | Roseau | 52 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.