Severe Thunderstorm Warning 220, NWS Grand Forks, ND

Issued

Aug 16, 2002, 9:10 PM CDT (02:10 UTC)

Expired

Aug 16, 2002, 10:00 PM CDT

In force

50 min

Issued by

NWS Grand Forks, ND

Area

Counties, with a storm outline in the text

County Polk County, MN

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.

245 
WUUS53 KFGF 170210
SVRFAR
MNC119-170300-

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

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...

  SOUTHERN POLK COUNTY IN NORTHWEST MINNESOTA.

* UNTIL 1000 PM CDT.

* AT 909 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 3 MILES WEST OF NIELSVILLE...OR ABOUT 29 MILES
  SOUTH OF GRAND FORKS...MOVEMENT WAS TO THE EAST AT 35 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...

  NIELSVILLE AT 915 PM AND
  BELTRAMI AT 935 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 4762 9680 4752 9683 4752 9648 4764 9648


7

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, 25 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

Severe Thunderstorm Warnings in Minnesota, 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; the sounding from the Mesonet's radiosonde archive.