Severe Thunderstorm Warning 108, NWS Great Falls, MT

Issued

Sep 4, 2000, 11:14 PM MDT (05:14 UTC)

Expired

Sep 4, 2000, 11:45 PM MDT

In force

31 min

Issued by

NWS Great Falls, MT

Area

Whole counties

County Chouteau County, MT

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.

000 
WUUS55 KTFX 050515
SVRGTF
MTC015-050545-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREAT FALLS MT
1114 PM MDT MON SEP 4 2000

THE NATIONAL WEATHER SERVICE IN GREAT FALLS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN CHOUTEAU COUNTY IN NORTH CENTRAL MONTANA

* UNTIL 1145 PM MDT

* AT 1110 PM MDT...THE PUBLIC REPORTED A SEVERE THUNDERSTORM OVER
  CENTRAL CHOUTEAU COUNTY...OR ABOUT 19 MILES SOUTH OF BIG SANDY...
  MOVING NORTHEAST AT 45 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
RURAL EASTERN CHOUTEAU COUNTY AT 1130 PM MDT
RURAL NORTHEASTERN CHOUTEAU COUNTY AT 1140 PM MDT

SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE
WARNING. PREPARE TO MOVE TO A PLACE OF SAFETY IN A STURDY STRUCTURE
SUCH AS A BASEMENT OR SMALL INTERIOR ROOM IF A TORNADO IS SPOTTED.

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH YOU SHOULD PREPARE
FOR DAMAGING WINDS IN EXCESS OF 55 MPH...LARGE HAIL...AND DEADLY
LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...PREFERABLY
INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

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

$$
LAT...LON 4798 11025 4780 11006 4798 10958 4820 10982

NWS Great Falls, MT wrote its last area forecast discussion before this severe thunderstorm warning went out at Sep 4, 9:00 PM MDT, 2 hours 14 minutes earlier.

SOUTHWEST AND NORTH CENTRAL MONTANA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREAT FALLS MT
900 PM MDT MON SEP 4 2000

TFX RADAR SHOWS A BAND OF ECHOES FROM NORTHERN BEAVERHEAD COUNTY
NORTHEAST INTO HILL AND BLAINE COUNTIES. SATELLITE PICTURES SHOW STRONG
UPPER LOW IN NORTHERN CALIFORNIA WITH CLOUDS INCREASING FROM THIS LOW
NORTHEAST INTO IDAHO AND WESTERN MONTANA. NEW ETA SHOWS A STRONG SHORT
WAVE EJECTING NORTHEAST INTO WESTERN MONTANA DURING THE NEXT 24 HOURS
WITH UPSLOPE CONTINUING. EXPECT SOME GOOD RAINFALL AMOUNTS IN FORECAST
AREA AS A RESULT. SHORT WAVE MOVES EASTWARD TUESDAY NIGHT WITH A HANG
BACK TROUGH OVER NORTHERN CALIFORNIA AND NORTHWEST NEVADA. RAIN SHOULD
END TUESDAY NIGHT WITH DRIER NORTHWEST FLOW FOR WEDNESDAY. WILL UPDATE
TO FINE TUNE FORECAST. OARD

EXTENDED DISCUSSION...MRF...72HR NEW AVN...72HR UKMET SHOW UPPER LOW
HANGING BACK OVER NORTHERN CALIFORNIA OR NORTHWEST NEVADA WEDNESDAY. MRF
TAKES THIS LITTLE LOW THROUGH MONTANA THURSDAY NIGHT AS NEXT TROUGH DIGS
TOWARD THE PACIFIC NORTHWEST. 60HOUR ETA DOES NOT SHOW TROUGH IN THIS
LOCATION WITH RIDGE UPSTREAM IN PACIFIC NORTHWEST. DIFFICULT TO BELIEVE
THE MRF COULD BE ACCURATE ON A SUCH A SMALL FEATURE THURSDAY NIGHT 108
HOURS OUT. WILL GO WITH EXTRAPOLATION OF ETA AND IGNORE THE LITTLE
TROUGH. THE STRONGER TROUGH APPROACHING PACIFIC NORTHWEST FRIDAY MOVES
INTO NORTHERN ROCKIES SATURDAY AND MAY SPREAD SCATTERED SHOWERS OR
THUNDERSTORMS OVER THE AREA. HOWEVER ECMWF...LAST RUN 24 HOURS
AGO...SHOWS ONLY A WEAK SHORT WAVE ZIPPING THROUGH SOUTHERN CANADA WITH
LITTLE AFFECT MONTANA...EXCEPT WIND. WILL GO WITH MRF ON SATURDAY. OARD

CCF NUMBERS
GTF RE 045/060 045/068 048 135621
CTB RE 044/060 044/066 044 134521
HLN RE 045/062 045/068 044 137731
BZN RW 043/068 040/068 040 136731
WEY RW 035/062 030/066 030 136731
DLN RW 042/065 040/067 038 136731
HVR RE 046/062 046/068 044 136721
LWT RE 046/060 043/0{65 042 138721

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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.