Severe Thunderstorm Warning 320, NWS Grand Forks, ND

Issued

Aug 17, 2001, 2:08 PM CDT (19:08 UTC)

Expired

Aug 17, 2001, 3:00 PM CDT

In force

52 min

Issued by

NWS Grand Forks, ND

Area

Whole counties; the outline is the Mesonet’s reconstruction

County Walsh County, ND

The Fargo/Grand Forks radar (KMVX), 98 km from the middle of the area, began a volume at 19:11 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.

264 
WUUS53 KFGF 171908
SVRFAR
NDC099-172000-

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

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...

  EASTERN WALSH COUNTY IN NORTHEAST NORTH DAKOTA.
  INCLUDING THE CITY OF GRAFTON...

* UNTIL 300 PM CDT.

* AT 205 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 3 MILES NORTHWEST OF NASH...OR ABOUT 9 MILES
  NORTHWEST OF GRAFTON...MOVEMENT WAS TO THE SOUTH AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...

  NASH AT 210 PM...
  GRAFTON AT 220 PM...
  VESELEYVILLE AT 225 PM AND
  VOSS AT 235 PM.

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

LAT...LON 4852 9747 4853 9774 4822 9755 4822 9729


$$

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 13 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 North Dakota, 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.