Alert archive / Montana / Severe Thunderstorm Warnings in 1995

Severe Thunderstorm Warning 31, NWS Missoula, MT

July 12, 1995Granite County, Montana

NWS Missoula, MT issued this severe thunderstorm warning at Jul 12, 1995, 5:55 PM MDT for Granite County, Montana. It was in force for 50 min.

The area

The counties it named.

The facts

Issued: Jul 12, 1995, 5:55 PM MDT (23:55 UTC)
Expired: Jul 12, 1995, 6:45 PM MDT
In force: 50 min
Issued by: NWS Missoula, MT
Area: Whole counties

County Granite County, MT

The nearest sounding before it

Great_falls, MT (KTFX), launched 12:00Z, 11.9 hours before the alert went out and 246 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 18 J/kg
Mixed-layer CIN: -185 J/kg
Mixed-layer LCL: 1465 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: -5 m²/s²
0-3 km storm-relative helicity: 119 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KMSO 122355 RRA
SVRMSO
MTC039-081-130045-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MISSOULA MT
555 PM MDT WED JUL 12 1995
 
THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  645 PM MDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN WEST CENTRAL MONTANA
 
   ...WESTERN GRANITE COUNTY...EASTERN RAVALLI COUNTY
 
AT 545 PM MDT MISSOULA DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 10
MILES WEST OF HAMILTON MOVING NORTHEAST AT 35 MILES PER HOUR. WEATHER
SPOTTERS IN DARBY EARLIER REPORTED MARBLE SIZED HAIL WITH THESE STORMS.
 
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOUR HOME OR BUSINESS.  HEAVY RAINS FLOOD ROADS QUICKLY SO
DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.
 
BARKER
 
&

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Local storm report, Jul 12, 12:05 PM MDT, 5 hours 50 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MISSOULA MT
1205 PM MDT WED JUL 12 1995

TIME(MDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ...COUNTY LOCATION.....

0648 AM    DARBY                     MT   HAIL .88 INCH
07/12/95   MISSOULA

END/CLEMMONS

Local storm report, Jul 12, 12:08 PM MDT, 5 hours 47 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MISSOULA MT
1205 PM MDT WED JUL 12 1995

TIME(MDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ...COUNTY LOCATION.....

0648 AM    DARBY                     MT   HAIL .88 INCH
07/12/95   MISSOULA

END/CLEMMONS

Special weather statement, Jul 12, 1:55 PM MDT, 4 hours before

MTZ004-122035-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MISSOULA MT
155 PM MDT WED JUL 12 1995

...STRONG THUNDERSTORMS DEVELOPING OVER WESTERN MONTANA...

1:45 PM MDT MISSOULA DOPPLER WEATHER RADAR INDICATED STRONG
THUNDERSTORMS DEVELOPING OVER WESTERN MONTANA. THE STRONGEST STORMS WERE
OVER DEER LODGE AND SILVER BOW COUNTIES. A WEATHER OBSERVER IN THE CITY
OF DEER LODGE REPORTED MARBLE SIZE HAIL. RADAR ALSO INDICATED ANOTHER
STORM IN IDAHO MOVING TOWARD NORTHERN BEAVERHEAD COUNTY. THESE STORMS
WERE MOVING TO THE NORTHEAST AT 30 MPH.

PORTIONS OF DEER LODGE, SILVER BOW AND SOUTHERN POWELL COUNTIES ARE
UNDER A SEVERE THUNDERSTORM WATCH UNTIL 800 PM TONIGHT. THE CITY OF
BUTTE IS INCLUDED IN THIS AREA.

STAY TUNED TO NOAA WEATHER RADIO OR YOUR FAVORITE RADIO OR TV STATION
FOR FURTHER UPDATES.

FOSS

Special weather statement, Jul 12, 1:58 PM MDT, 3 hours 57 minutes before

MTZ004-122035-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MISSOULA MT
155 PM MDT WED JUL 12 1995

...STRONG THUNDERSTORMS DEVELOPING OVER WESTERN MONTANA...

1:45 PM MDT MISSOULA DOPPLER WEATHER RADAR INDICATED STRONG
THUNDERSTORMS DEVELOPING OVER WESTERN MONTANA. THE STRONGEST STORMS WERE
OVER DEER LODGE AND SILVER BOW COUNTIES. A WEATHER OBSERVER IN THE CITY
OF DEER LODGE REPORTED MARBLE SIZE HAIL. RADAR ALSO INDICATED ANOTHER
STORM IN IDAHO MOVING TOWARD NORTHERN BEAVERHEAD COUNTY. THESE STORMS
WERE MOVING TO THE NORTHEAST AT 30 MPH.

PORTIONS OF DEER LODGE, SILVER BOW AND SOUTHERN POWELL COUNTIES ARE
UNDER A SEVERE THUNDERSTORM WATCH UNTIL 800 PM TONIGHT. THE CITY OF
BUTTE IS INCLUDED IN THIS AREA.

STAY TUNED TO NOAA WEATHER RADIO OR YOUR FAVORITE RADIO OR TV STATION
FOR FURTHER UPDATES.

FOSS

The office that day

Everything else NWS Missoula, MT issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 12, 6:37 AM MDT	Severe Thunderstorm Warning	MSO	Ravalli	38 min
Jul 12, 2:37 PM MDT	Severe Thunderstorm Warning	MSO	Beaverhead	48 min
Jul 12, 4:43 PM MDT	Severe Thunderstorm Warning	MSO	Ravalli	62 min
Jul 12, 5:55 PM MDT	Severe Thunderstorm Warning	MSO	Ravalli	40 min

Nearby

Severe Thunderstorm Warnings in Montana, 1995 Every severe thunderstorm warning in 1995

Sources

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.