Severe Thunderstorm Warning 70, NWS Great Falls, MT

Issued

Jul 8, 2000, 8:25 PM MDT (02:25 UTC)

Expired

Jul 8, 2000, 9:30 PM MDT

In force

65 min

Issued by

NWS Great Falls, MT

Area

Whole counties; the outline is the Mesonet’s reconstruction

Counties Blaine County, MT, Chouteau County, MT

The Great Falls radar (KTFX), 131 km from the middle of the area, began a volume at 02:28 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.

000 
WUUS55 KTFX 090226
SVRGTF
MTC005-015-090330-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREAT FALLS MT
825 PM MDT SAT JUL 8 2000

THE NATIONAL WEATHER SERVICE IN GREAT FALLS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN BLAINE COUNTY IN NORTH CENTRAL MONTANA 

* UNTIL 930 PM MDT

* AT 825 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 5 MILES NORTH OF MOCCASIN...OR ABOUT 32 MILES
  SOUTH OF BIG SANDY...MOVING NORTHEAST AT 35 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  OVER LEROY AROUND 900 PM MDT

VERY LARGE HAIL IS POSSIBLE WITH THIS SEVERE THUNDERSTORM. IF YOU ARE
IN THE PATH OF THE STORM...PUT YOUR CAR IN A GARAGE AND MOVE TO A
SUBSTANTIAL SHELTER.

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 MIDNIGHT MDT 
SUNDAY MORNING FOR CENTRAL MONTANA. 

LAT...LON 4776 11009 4758 10991 4774 10985 4783 10909
          4806 10923

NWS Great Falls, MT wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 8, 3:00 PM MDT, 5 hours 25 minutes earlier.

SOUTHWEST AND NORTH CENTRAL MONTANA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREAT FALLS MT
300 PM MDT SAT JUL 8 2000

WAITING FOR CONVECTION TO KICK OFF THIS AFTERNOON. DEW POINTS SLOWLY
RISING AT THIS TIME WITH SATELLITE IMAGERY INDICATING CUMULUS DEVELOPING
OVER SOUTHWEST MONTANA AS WELL AS OVER BELT MOUNTAINS. MESOETA TAKES
SHORTWAVE NOW OVER IDAHO AND MOVES IT ACROSS CENTRAL MONTANA THIS
EVENING AND EVENTUALLY INTO NORTHEAST MONTANA. STRONG OMEGA VALUES AS
WELL AS GOOD CAPE AND HELICITY NUMBERS ALL POINT TO AN ACTIVE CONVECTIVE
EVENING. LATEST MESOSCALE DISCUSSION INDICATES A WATCH BOX MAY BE
FORTHCOMING WITHIN THE NEXT COUPLE OF HOURS AS SPC FIGURES ACTIVITY
GEARING UP BY 22Z. CLOSED UPPER LOW AND ASSOCIATED TROF MOVE FURTHER
EAST SUNDAY WITH AIRMASS OVER CWA REMAINING UNSTABLE. SHORTWAVES
CONTINUE TO ROTATE OUT OF TROF FOR A CONTINUED CHANCE OF AFTERNOON
CONVECTION. LOW BEGINS TO LIFT OUT MONDAY WITH AXIS OF TROF FINALLY
PASSING OVER CWA. UNTIL THIS HAPPENS...WILL GO WITH SCATTERED
THUNDERSTORMS EACH PERIOD. TEMPERATURES CHANGE LITTLE NEXT 48 HOURS
ALTHOUGH...WILL DROP THEM A TAD FOR MONDAY. EMANUEL

EXTENDED DISCUSSION...NEW LONG RANGE PROGS INDICATE UPPER TROUGH HAS
WEAKENED CONSIDERABLY BY TUESDAY. UPPER RIDGE BUILDS INTO EASTERN
MONTANA OR DAKOTAS WEDNESDAY AND THURSDAY. THIS INDICATES TEMPERATURES
WILL RISE WITH LESS CHANCE OF THUNDERSTORMS IN 3 TO 5 DAY PERIOD. OARD

CCF NUMBERS
GTF TB 052/080 050/077 048 085333
CTB TB 048/076 046/073 045 084333
HLN TB 051/080 049/078 052 084333
BZN TB 047/082 045/078 048 084333
WEY TB 040/078 038/074 040 084444
DLN TB 046/082 043/078 046 083333
HVR TB 054/082 052/082 054 084433
LWT TB 050/080 047/077 048 086433

Severe Thunderstorm Warnings in Montana, 2000Every severe thunderstorm warning in 2000

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.