Severe Thunderstorm Warning 225, NWS Grand Forks, ND

Issued

Aug 16, 2002, 10:03 PM CDT (03:03 UTC)

Expired

Aug 16, 2002, 10:45 PM CDT

In force

42 min

Issued by

NWS Grand Forks, ND

Area

Counties, with a storm outline in the text

County Sargent County, ND

The Aberdeen radar (KABR), 105 km from the middle of the area, began a volume at 03:06 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.

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.

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.

835 
WUUS53 KFGF 170303
SVRFAR
NDC081-170345-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS
1003 PM CDT FRI AUG 16 2002

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...

  NORTHERN SARGENT COUNTY IN SOUTHEAST NORTH DAKOTA.

* UNTIL 1045 PM CDT.

* AT 959 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 3 MILES NORTHEAST OF GWINNER...OR ABOUT 49
  MILES WEST OF WAHPETON...MOVEMENT WAS TO THE EAST AT 50 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...

  MILNOR AT 1010 PM AND
  DE LAMERE AT 1015 PM.

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.

LAT...LON 4627 9775 4612 9785 4613 9734 4627 9730


55

NNNN

NWS Grand Forks, ND wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 16, 8:45 PM CDT, 1 hour 18 minutes earlier.

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

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

PVB

Severe Thunderstorm Warnings in North Dakota, 2002Every severe thunderstorm warning in 2002

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.