Alert archive / Montana / Severe Thunderstorm Warnings in 1995

Severe Thunderstorm Warning 27, NWS Missoula, MT

July 12, 1995Ravalli County, Montana

NWS Missoula, MT issued this severe thunderstorm warning at Jul 12, 1995, 6:37 AM MDT for Ravalli County, Montana. It was in force for 38 min.

The area

The counties it named.

The facts

Issued
Jul 12, 1995, 6:37 AM MDT (12:37 UTC)
Expired
Jul 12, 1995, 7:15 AM MDT
In force
38 min
Issued by
NWS Missoula, MT
Area
Whole counties

County Ravalli County, MT

The nearest sounding before it

Spokane, WA (KOTX), launched 12:00Z, 0.6 hours before the alert went out and 250 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-pSkew-T log-p diagram, Spokane, WA at 12:00Z on 1995-07-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Spokane, WA at 12:00Z on 1995-07-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 0 square meters per square second.1939587897117136156Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2319 m above ground
0-6 km bulk shear
72 kt
0-1 km storm-relative helicity
0 m²/s²
0-3 km storm-relative helicity
7 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 121238 RRA
SVRMSO
MTC081-121330-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MISSOULA MT
637 AM MDT WED JUL 12 1995
 
THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  730 AM MDT
FOR PEOPLE IN THE FOLLOWING LOCATION...                     ...
 
IN WEST CENTRAL MONTANA
 
   ...CENTRAL AND EASTCENTRAL RAVALLI COUNTY
 
AT 635 PM MDT MISSOULA DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
WITH STRONG WIND 10 MILES SOUTHWEST OF DARBY AND MOVING NORTHEAST AT
40 MILES AN HOUR. LARGE HAIL IS ALSO POSSIBLE WITH THIS THUNDERSTORM.
 
IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A
STRONG BUILDING.  DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...
AND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS.
STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.
 
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.

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 12, 2:37 PM MDTSevere Thunderstorm WarningMSOBeaverhead48 min
Jul 12, 4:43 PM MDTSevere Thunderstorm WarningMSORavalli62 min
Jul 12, 5:55 PM MDTSevere Thunderstorm WarningMSORavalli40 min
Jul 12, 5:55 PM MDTSevere Thunderstorm WarningMSOGranite50 min

Nearby

Severe Thunderstorm Warnings in Montana, 1995Every 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.