Severe Thunderstorm Warning 322, NWS Grand Forks, ND

Issued

Aug 17, 2001, 2:27 PM CDT (19:27 UTC)

Expired

Aug 17, 2001, 3:15 PM CDT

In force

48 min

Issued by

NWS Grand Forks, ND

Area

Whole counties; the outline is the Mesonet’s reconstruction

Counties Marshall County, MN, Pennington County, MN

The Fargo/Grand Forks radar (KMVX), 113 km from the middle of the area, began a volume at 19:29 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.

458 
WUUS53 KFGF 171928
SVRFAR
MNC089-113-172015-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND-GRAND FORKS
227 PM CDT FRI AUG 17 2001

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...

  CENTRAL MARSHALL COUNTY IN NORTHWEST MINNESOTA AND 
  NORTHERN PENNINGTON COUNTY IN NORTHWEST MINNESOTA.   

  INCLUDING THE CITY OF THIEF RIVER FALLS...

* UNTIL 315 PM CDT.

* AT 223 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 5 MILES WEST OF HOLT...OR ABOUT 13 MILES
  NORTHWEST OF THIEF RIVER FALLS...MOVEMENT WAS TO THE SOUTHEAST AT
  25 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...

  HOLT AT 230 PM...
  ROSEWOOD AT 235 PM...
  DAKOTA JUNCTION AT 245 PM AND
  THIEF RIVER FALLS AT 250 PM.

REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE
TORNADOES WITH LITTLE OR NO ADVANCE WARNING.

LAT...LON 4838 9627 4827 9648 4801 9619 4814 9594


$$

7

NNNN

NWS Grand Forks, ND wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 17, 10:55 AM CDT, 3 hours 32 minutes earlier.

FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
1055 AM CDT FRI AUG 17 2001

UPDATE PLANNED FOR THIS AFTERNOON. FCST CHALLENGE IS EXTENT AND
DURATION OF CONVECTION AHEAD OF APPROACHING CDFRNT DROPPING OUT OF
SRN MANITOBA THIS AFTERNOON. SURFACE TEMPERATURES AND ASSOCIATED SFC
COMPUTED LIFTED INDICES ARE INCREASING AND POOLING AHEAD OF THE
FRONT. 12 MESOETA GUIDANCE IS BEHIND THE CURVE AS LIFTED INDICES ARE
NEARLY DOUBLE THE MODEL PROJECTIONS FOR THIS TIME. EXPECT TSTMS TO
OVERSPREAD NORTHWEST MINNESOTA AND NORTHERN TWO THIRDS OF THE RRV
THROUGH THE AFTERNOON...WITH WDLY SCATTTERED TSTMS IN REMAINDER OF
ERN ND AND WCNTRL MN. THERE IS A POTENTIAL FOR LARGE HAIL WITH THESE
STORMS AS COLD POOL ALOFT IS QUITE DEEP FOR THIS TIME OF YEAR...AND
500MB TEMPS DROP BELOW MINUS 15. MODIFIED INL-GFK SOUNDING FROM THIS
AM INCREASES LIFTED INDICES TO MINUS 5 OR 6 RANGE BY MID AFTERNOON
WITH CAPE VALUES APPROACHING 1900 J/KG. 6KM SHEAR VALUES VALUES
INCREASE TO AROUND 25 KTS WHICH WOULD CERTAINLY SUPPORT SUPERCELL
DEVELOPMENT.

WILL BUMP UP FCST AFTERNOON TEMPS 3-5 DEGREES ACROSS THE AREA. AND
MENTION TSTMS LIKELY WITH SOME POSSIBLY SEVERE NORTHEAST OF A LANGDON
...TO MAYVILLE...TO FAR AND DTL. DVEELOPING IN THE NORTHERN HALF OF
THIS AREA THROUGH EARLY AFTERNOON AND SPREADING SWD THROUGH MID TO
LATE AFTERNOON.

.FGF...NONE.

GUST

Severe Thunderstorm Warnings in Minnesota, 2001Every severe thunderstorm warning in 2001

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.