Severe Thunderstorm Warning 372, NWS Grand Forks, ND

Issued

Aug 29, 2001, 5:37 PM CDT (22:37 UTC)

Expired

Aug 29, 2001, 6:15 PM CDT

In force

38 min

Issued by

NWS Grand Forks, ND

Area

Whole counties; the outline is the Mesonet’s reconstruction

County Otter Tail County, MN

The Fargo/Grand Forks radar (KMVX), 174 km from the middle of the area, began a volume at 22:40 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.

793 
WUUS53 KFGF 292237
SVRFAR
MNC111-292315-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND-GRAND FORKS
537 PM CDT WED AUG 29 2001

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...

  EASTERN OTTER TAIL COUNTY IN WEST CENTRAL MINNESOTA.

* UNTIL 615 PM CDT.

* AT 534 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THE
  LEADING EDGE OF SEVERE THUNDERSTORMS ALONG A LINE EXTENDING FROM 11
  MILES SOUTHEAST OF DETROIT LAKES TO 12 MILES SOUTHEAST OF FERGUS
  FALLS...MOVEMENT WAS TO THE EAST AT 20 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...

  AMOR AT 540 PM...
  BATTLE LAKE AT 550 PM...
  PERHAM AT 555 PM AND
  CLITHERALL AT 600 PM.

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

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM WEDNESDAY
EVENING FOR NORTHWESTERN MINNESOTA AND SOUTHEAST NORTH DAKOTA.

LAT...LON 4671 9579 4612 9603 4612 9540 4669 9519


$$

7

NNNN

NWS Grand Forks, ND wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 29, 1:20 PM CDT, 4 hours 17 minutes earlier.

FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS
120 PM CDT WED AUG 29 2001

...MAIN FORECAST CHALLENGES CENTER ON EARLY CONVECTIVE CHANCES WITH
FROPA AND THEN EXTENT OF COOL DOWN IN WAKE OF FRONT...

.CURRENT OBSERVATIONAL OVERVIEW...
18Z MSAS ANALYSIS DEPICTED LOW PRESSURE OVER EASTERN MANITOBA
PROVINCE WITH ASSOCIATED PRE-FRONTAL TROUGH SLICING SOUTH INTO
EASTERN NORTH DAKOTA WITH PARENT COLD FRONT INTO CENTRAL NORTH
DAKOTA. STRONG PRESSURE FALLS STILL EVIDENT OVER CENTRAL MINNESOTA
SUGGESTING FRONT SHOULD CONTINUE TO MAKE STEADY EASTWARD PROGRESS
THIS AFTERNOON. ATTM BEST BREEDING GROUND FOR CONVECTIVE DEVELOPMENT
IS ACROSS SOUTHEAST NORTH DAKOTA WHERE STRONGEST MOISTURE FLUX
CONVERGENCE AND INSTABILITY IS EVIDENT.

...FORECAST DETAILS...
EXTRAPOLATION OF FRONT...PER SATELLITE...RADAR AND OBSERVATIONAL
SITES SUGGESTS BOUNDARY SHOULD CLEAR VALLEY BY LATE AFTERNOON AND
THEN MINNESOTA LATER THIS EVENING. DESPITE QUIET RADAR ATTM FEEL
ENOUGH LOW-LEVEL FORCING AND INSTABILITY PRESENT TO FIRE STORMS OFF
AS AFTERNOON WEARS ON WITH THREAT LINGERING INTO THIS EVENING ACROSS
MINNESOTA. SEE SWODY1 DISCUSSION FOR FURTHER DETAILS ON THIS MATTER.
IN WAKE OF FRONT GOOD PUNCH OF CAA SLATED FOR TONIGHT AND THURSDAY
WITH LOW POP THREAT STILL JUSTIFIED ESPECIALLY EAST OF THE VALLEY AS
LINGERING CYCLONIC CURVATURE AND COLD POOL ALOFT GENERATE SHOWER
CHANCES. ON FRIDAY HEART OF HIGH IN CLOSE PROXIMITY TO THE REGION
WITH NOTHING MORE THAN SOME FAIR WEATHER CU ALONG WITH CONTINUATION
OF BELOW NORMAL TEMPERATURES.

.EXTENDED...
A MORE STABLE PATTERN SETTING UP FOR THE EXTENDED PERIODS AS UPPER
LEVEL FLOW FLATTENS OUT AND BECOMES ZONAL. MODELS INDICATE A COUPLE
OF BOUNDARIES TRY TO MOVE THROUGH THE UPPER MIDWEST ON SUNDAY AND
TUESDAY. THUS WILL KEEP MENTION OF THUNDERSTORMS ON SUNDAY...BUT
WILL KEEP TUESDAY DRY FOR NOW DUE TO LACK OF PERSISTENCE WITH THE
LATTER FEATURE. WITH THE EXCEPTION FOR SATURDAY...TEMPS WILL BE NEAR
SEASONAL AVERAGES.

.FGF...NONE

BERG/DONAVON

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.