Severe Thunderstorm Warning 45, NWS Great Falls, MT

Issued

Jul 8, 2002, 3:41 PM MDT (21:41 UTC)

Expired

Jul 8, 2002, 4:15 PM MDT

In force

34 min

Issued by

NWS Great Falls, MT

Area

Counties, with a storm outline in the text

Counties Chouteau County, MT, Hill County, MT

The Great Falls radar (KTFX), 121 km from the middle of the area, began a volume at 21:40 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.

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.

411 
WUUS55 KTFX 082141
SVRTFX
MTC015-041-082215-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREAT FALLS MT
339 PM MDT MON JUL 8 2002

THE NATIONAL WEATHER SERVICE IN GREAT FALLS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN CHOUTEAU COUNTY IN NORTH CENTRAL MONTANA
  THIS INCLUDES THE CITIES OF...FORT BENTON...BIG SANDY   
  HILL COUNTY IN NORTH CENTRAL MONTANA
  THIS INCLUDES THE CITY OF HAVRE

* UNTIL 415 PM MDT

* AT 335 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  A LINE OF SEVERE THUNDERSTORM 5 MILES NORTHEAST OF FORT            
  BENTON...MOVING NORTHEAST AT 20 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BOX ELDER...GERALDINE...
  GILDFORD AND INVERNESS

LARE HAIL AND STRONG WINDS IN EXCESS OF 60 MPH ARE POSSIBLE WITH 
THESE THUNDERSTORMS.

REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY
WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST
OFFICE IN GREAT FALLS.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 700 PM MDT MONDAY
EVENING FOR NORTH CENTRAL MONTANA.

LAT...LON 4896 11069 4750 11070 4747 11022 4782 10966
          4895 10992

NWS Great Falls, MT wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 8, 3:00 PM MDT, 41 minutes earlier.

SOUTHWEST AND NORTH CENTRAL MONTANA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREAT FALLS MT
300 PM MDT MON JUL 8 2002

.SHORT TERM...SEVERE THUNDERSTORM WATCH UNTIL 7 PM. VIGOROUS
SHORT WAVE TO SWING THROUGH KGTF CWFA THIS EVENING WITH GOOD
MOIST EAST FLOW FOR SEVERE WEATHER POTENTIAL. THESE STORMS
MAY CONTAIN LARGE HAIL AND DAMAGING WINDS ACROSS MUCH
OF CENTRAL MONTANA AND THE EAST PART BY LATER THIS EVENING. LIFTED
INDECIES WERE IN THE -8 TO -10 RANGE LATE THIS MORNING AS
PER IR IMAGERY. SHORT WAVE WILL MOVE INTO SOUTHERN SASK
BY TUE...AS UPPER MAIN RIDGE OVER SW CONUS BUILDS INTO WESTERN
MONTANA...LEAVING AREA UNDER A DRY NORTHWEST FLOW ALOFT.
HOWEVER...WEAK DYNAMICS OVER SOUTHWEST MONTANA TUESDAY FOR
PARTLY CLOUDY SKIES.
MEANWHILE...SURFACE HIGH OVER PACIFIC NORTHWEST COMBINED
WITH SURFACE LOW OVER SOUTHERN CANADA FOR SOUTHWEST TO WEST
WINDS TONIGHT INTO EARLY TUESDAY...THEN DIMINISH DURING THE
AFTERNOON AS SURFACE HIGH MOVES INTO CENTRAL MONTANA.

TEMPERATURES WARM NICELY WEDNESDAY AND THURSDAY AS STRONG
UPPER RIDGE CONTINUES TO BUILD NORTH INTO SOUTHERN CANADA.
WILLIAMSON DC

.EXTENDED...
MODELS CONTINUE MEAN RIDGE OVER WESTERN US. COLD FRONT TO MOVE
THROUGH LATE IN WEEKEND WHICH WILL BRING COOLER CONDITIONS.
SOUTHWEST FLOW BECOMES MORE WESTERLY AS SHORT WAVES MOVE THROUGH
FLOW. THIS WILL BRING A CHANCE OF SHOWERS/THUNDERSTORMS SUNDAY AND
MONDAY. TEMPERATURES WILL COOL TOO...MORE NEAR SEASONAL AVERAGES IN
THE LOWER TO MID 80S.

.CCF NUMBERS
GTF UU 054/084 050/092 052 20300
    UUUBB 094/054 092/053 092/053 088/053 085 00000000122
CTB UU 050/082 047/086 052 20200
    UUUBB 090/051 088/050 088/050 085/050 081 00000000122
HLN BB 053/087 050/094 056 20200
    BUUBB 095/055 095/054 092/054 087/054 085 00000000122
BZN BB 048/084 046/090 050 20100
    BUUBB 092/051 092/050 090/050 088/050 088 00000000011
WEY BB 040/078 038/082 043 20100
    BUUBB 084/042 084/042 082/041 079/041 077 00000000011
DLN BB 048/085 046/088 050 20100
    BUUBB 092/052 092/051 092/051 088/051 088 00000000011
HVR BU 058/085 052/090 056 20510
    UUUBB 095/055 095/054 092/060 088/057 086 00000000122
LWT BB 052/082 050/087 052 20610
    BUUBB 092/055 092/056 089/055 089/055 088 00000000122

.TFX...SEVERE THUNDERSTORM WATCH UNTIL 7 PM FOR CENTRAL AND PARTS
       OF SOUTHWEST MONTANA.

Severe Thunderstorm Warnings in Montana, 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; radar from the NEXRAD Level II archive.