Alert archive / Minnesota / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 234, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Aug 16, 2002, 11:30 PM CDT for Becker County, Minnesota. It was in force for 30 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 16, 2002, 11:30 PM CDT (04:30 UTC)
- Expired
- Aug 17, 2002, 12:00 AM CDT
- In force
- 30 min
- Issued by
- NWS Grand Forks, ND
- Area
- Counties, with a storm outline in the text
County Becker County, MN
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 16, 10:00 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
International Fa, MN (KINL), launched 00:00Z, 4.5 hours before the alert went out and 235 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
- 12 J/kg
- Mixed-layer CIN
- -104 J/kg
- Mixed-layer LCL
- 1046 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 98 m²/s²
- 0-3 km storm-relative helicity
- 126 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted, in the capitals the NWS used until 2016.
346 WUUS53 KFGF 170430 SVRFAR MNC005-170500- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS 1130 PM CDT FRI AUG 16 2002 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EASTERN BECKER COUNTY IN NORTHWEST MINNESOTA. * UNTIL MIDNIGHT CDT. * AT 1129 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THE LEADING EDGE OF SEVERE THUNDERSTORMS ALONG A LINE EXTENDING FROM 32 MILES SOUTHWEST OF BEMIDJI TO 25 MILES EAST OF DETROIT LAKES... MOVEMENT WAS TO THE EAST AT 60 MPH. * SEVERE THUNDERSTORMS WILL REMAIN IN RURAL AREAS OF EASTERN BECKER COUNTY REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL MIDNIGHT SATURDAY MORNING FOR NORTHWESTERN MINNESOTA AND EASTERN NORTH DAKOTA. A SEVERE THUNDERSTORM WATCH ALSO REMAINS IN EFFECT UNTIL 300 AM SATURDAY MORNING FOR NORTHWESTERN MINNESOTA AND SOUTHEAST NORTH DAKOTA. LAT...LON 4713 9543 4673 9545 4674 9520 4712 9522 7 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 16, 8:45 PM CDT, 2 hours 45 minutes earlier.
Area forecast discussion, Aug 16, 8:45 PM CDT, 2 hours 45 minutes before
FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 845 PM CDT FRI AUG 16 2002 TWO CHALLENGES REMAIN FOR THIS EVENING...FIRST IS CONVECTION AND THE SECOND IS WIND. SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR SOUTHWEST PORTIONS OF THE FA UNTIL MIDNIGHT. AT THIS TIME IT APPEARS THE BEST THREAT MAY BE SHIFTING FURTHER SOUTH...WITH MORE WIDESPREAD SHOWER/WEAKER TSTORM ACTIVITY FOR THIS AREA. STILL SOME BOUNDARIES APPARENT ON THE KMVX 88D THAT MAY INTERSECT AND PROVIDE SOME SEVERE WEATHER. WILL CONTINUE TO MONITOR BUT EXPECT LITTLE CHANGE TO THUNDER WORDING IN ZONES. HIGH WIND WATCH ALSO LEFT OVER FROM DAY SHIFT. APPEARS THAT BEST SFC PRESSURE GRADIENT IS OVER SOUTHWEST ND. SEEING QUITE A FEW GUSTS IN THAT AREA OVER 50 KNOTS. 12Z/18Z MODEL RUNS NOT HANDLING THE SFC LOW TRACK VERY WELL. MSAS 3 HOUR PRESSURE FALLS STILL BEST EAST OF THE LOW (NOT NORTHEAST). THIS FURTHER SOUTHWARD TRACK WOULD FAVOR A FURTHER SOUTHWARD PUSH OF THE STRONGEST WINDS. THE EARLIER MODEL RUNS ALSO SHOW BEST PUSH OF COLD ADVECTION OVER THE FA FROM 06Z-12Z WHICH CORRESPONDS TO THE COLD FRONTAL PASSAGE. AVN LOOKS TO BE DOING A SLIGHTLY BETTER JOB SHOWING THE BEST 850 MB WIND SURGE FROM WESTERN ND AND SOUTHEAST UNTIL 06Z...THEN THE AVN IS WEAKER ON 850 MB WIND SPEEDS AFTER 12Z THAN THE ETA. WILL THEREFORE GO WITH A WIND ADVISORY FOR THE ENTIRE FA FOR LATE TONIGHT INTO SATURDAY. .FGF...WIND ADVISORY FOR LATE TONIGHT AND SATURDAY ENTIRE FA. GODON
In the hours before
Local storm report, Aug 16, 9:57 PM CDT, 1 hour 33 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND FORKS, ND
957 PM CDT FRI AUG 16 2002
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0905 PM 5 E GRANDIN ND .75 INCH HAIL
08/16/02 CASS
0930 PM 9 NE ADA MN 1.75 INCH HAIL
08/16/02 NORMAN
PVBLocal storm report, Aug 16, 10:08 PM CDT, 1 hour 22 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND FORKS, ND
1008 PM CDT FRI AUG 16 2002
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0940 PM 4 E KATHRYN ND .75 INCH HAIL
08/16/02 BARNES
PVBLocal storm report, Aug 16, 10:58 PM CDT, 32 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND FORKS, ND
1058 PM CDT FRI AUG 16 2002
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
1000 PM 4 NE LISBON ND 1.00 INCH HAIL
08/16/02 RANSOM
1015 PM 3 E MCLEOD ND WIND DAMAGE
08/16/02 RANSOM 1-2 INCH DIAMETER BRANCHES
DOWN
1040 PM FARGO ND WIND DAMAGE
08/16/02 CASS NUMEROUS TREES DOWN
BLOCKING ROAD
1045 PM MOORHEAD MN WIND DAMAGE
08/16/02 CLAY NUMEROUS TREES DOWN
BLOCKING ROAD
PVBLocal storm report, Aug 16, 10:58 PM CDT, 32 minutes before
PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE GRAND FORKS, ND
1058 PM CDT FRI AUG 16 2002
...CORRECTED COUNTY IN SECOND REPORT...
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
1000 PM 4 NE LISBON ND 1.00 INCH HAIL
08/16/02 RANSOM
1015 PM 3 E MCLEOD ND WIND DAMAGE
08/16/02 RICHLAND 1-2 INCH DIAMETER BRANCHES
DOWN
1040 PM FARGO ND WIND DAMAGE
08/16/02 CASS NUMEROUS TREES DOWN
BLOCKING ROAD
1045 PM MOORHEAD MN WIND DAMAGE
08/16/02 CLAY NUMEROUS TREES DOWN
BLOCKING ROAD
PVBLocal storm report, Aug 16, 11:06 PM CDT, 24 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND FORKS, ND
1106 PM CDT FRI AUG 16 2002
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
1057 PM LAKE PARK MN 63 MPH TSTORM WIND
08/16/02 BECKER REPORTED BY MN RWIS SITE
PVBThe office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 16, 9:01 PM CDT | Severe Thunderstorm Warning | FGF | Norman | 29 min |
| Aug 16, 9:10 PM CDT | Severe Thunderstorm Warning | FGF | Polk | 50 min |
| Aug 16, 9:29 PM CDT | Severe Thunderstorm Warning | FGF | Mahnomen, Norman | 46 min |
| Aug 16, 9:46 PM CDT | Severe Thunderstorm Warning | FGF | Otter Tail | 44 min |
| Aug 16, 10:29 PM CDT | Severe Thunderstorm Warning | FGF | Clay | 46 min |
| Aug 16, 10:34 PM CDT | Severe Thunderstorm Warning | FGF | Wilkin | 41 min |
| Aug 16, 10:49 PM CDT | Severe Thunderstorm Warning | FGF | Becker | 41 min |
| Aug 16, 10:53 PM CDT | Severe Thunderstorm Warning | FGF | Otter Tail | 52 min |
| Aug 16, 11:25 PM CDT | Severe Thunderstorm Warning | FGF | Hubbard | 50 min |
| Aug 16, 11:55 PM CDT | Tornado Warning | FGF | Otter Tail | 50 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.