Flash Flood Warning 9, NWS Glasgow, MT

Issued

Aug 7, 2002, 2:21 AM MDT (08:21 UTC)

Expired

Aug 7, 2002, 8:15 AM MDT

In force

6 hr

Issued by

NWS Glasgow, MT

Area

Counties, with a storm outline in the text

County Roosevelt County, MT

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this flash flood 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.

000 
WGUS55 KGGW 070821
FFWGGW
MTC085-071415-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE GLASGOW MT
218 AM MDT WED AUG 7 2002

THE NATIONAL WEATHER SERVICE IN GLASGOW HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  WESTERN ROOSEVELT COUNTY IN NORTHEAST MONTANA

* UNTIL 815 AM MDT

* AT 215 AM MDT...THE NATIONAL WEATHER SERVICE DOPPLER RADAR 
  INDICATED THUNDERSTORMS WITH VERY HEAVY RAINFALL 24 MILES SOUTH OF 
  BREDETTE...OR ABOUT 9 MILES NORTHEAST OF WOLF POINT...MOVING NORTH 
  AT 20 MPH.

* SLOW MOVING THUNDERSTORMS ARE PRODUCING TORRENTIAL RAINFALL IN THE 
  WARNED AREA. RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE 
  FLASH FLOODING TO OCCUR.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE 
DANGERS OF FLOODS AND FLASH FLOODS. IF FLASH FLOODING IS OBSERVED ACT
QUICKLY. MOVE UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY
IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY.
MOVE TO HIGHER GROUND.

LAT...LON 4810 10563 4810 10536 4853 10499 4853 10577

.END
88

NWS Glasgow, MT wrote its last area forecast discussion before this flash flood warning went out at Aug 6, 8:30 PM MDT, 5 hours 51 minutes earlier.

NORTHEAST MONTANA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GLASGOW MT
830 PM MDT TUE AUG 6 2002

.SHORT TERM...KGGW SOUNDING SHOWING 18Z CAP QUICKLY ERODED ALLLOWING
FOR SEVERE STORM DEVELOPMENT...BUT RATHER ISOLATED. UPDATING ZONES
FOR NEW SEVERE THUNDERSTORM WATCH WHICH REPLACES TORNADO WATCH. WILL
CHANGE SOME WORDING AND UPDATE SURFACE WINDS. SIMONSEN

.LONG TERM...
12Z AVN A BIT SLOWER WITH EXITING UPPER LOW LATER THIS WEEK. ITS
TIMING MORE IN LINE WITH ECMWF SOLUTION. UPPER TROF THEN FOLLOWS
THIS SYSTEM FROM THE NW TO BRING ANOTHER COOL AIRMASS.  JAMBA

KGGW TTB 062/084 059/078 059/078 76466663
     BTBB 054/084 053/084 053/080 053/078 7600032011
KGDV TTB 063/086 060/079 060/080 76466663
     BTBE 054/085 055/084 055/081 055/079 7600132022

.GGW...TORNADO WATCH CANCELLED. SEVERE THUNDERSTORM WATCH UNTIL 2
AM...ALL COUNTIES EXCEPT PHILLIPS AND PETROLEUM.

Flash Flood Warnings in Montana, 2002Every flash flood 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.