Alert archive / Montana / Severe Thunderstorm Warnings in 1995

Severe Thunderstorm Warning 44, NWS Missoula, MT

September 7, 1995Ravalli County, Montana

NWS Missoula, MT issued this severe thunderstorm warning at Sep 7, 1995, 2:19 PM MDT for Ravalli County, Montana. It was in force for 56 min.

The area

The counties it named.

The facts

Issued
Sep 7, 1995, 2:19 PM MDT (20:19 UTC)
Expired
Sep 7, 1995, 3:15 PM MDT
In force
56 min
Issued by
NWS Missoula, MT
Area
Whole counties

County Ravalli County, MT

The nearest sounding before it

Spokane, WA (KOTX), launched 12:00Z, 8.3 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 1995-09-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 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 1995-09-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -5 square meters per square second.193958Sfc1 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
793 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
-5 m²/s²
0-3 km storm-relative helicity
63 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 072020 RRA
SVRMSO
MTC081-072115-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MISSOULA MT
219 PM MDT THU SEP 7 1995
 
THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  315 PM MDT
FOR PEOPLE IN THE FOLLOWING LOCATION...                     ...
 
IN WEST CENTRAL MONTANA
 
   ...RAVALLI COUNTY
 
DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 25 MILES SOUTHWEST OF
HAMILTON AT 215 PM MDT. THIS STORM WAS MOVING TOWARDS THE NORTHEAST AT
ABOUT 35 MPH AND WILL BE MOVING INTO THE HAMILTON AREA BY 245
PM MDT.
 
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.
 
KRENZ

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.

NWS Missoula, MT wrote its last area forecast discussion before this severe thunderstorm warning went out at Sep 7, 8:57 AM MDT, 5 hours 22 minutes earlier.

Area forecast discussion, Sep 7, 8:57 AM MDT, 5 hours 22 minutes before
CLOSED UPPER LOW OVER CENTRAL WASHINGTON/OREGON BORDER STILL
MOVING SLOWER THAN MODELS HAVE INDICATED LAST FEW DAYS. MODELS
FORECASTING IT TO MOVE OVER WESTERN MONTANA AND WEAKEN BY LATE FRIDAY.
SOME DIFFERENCES IN MOVEMENT OF VORT LOBES THROUGH THE LOW...BUT
MAIN ACTION OF THUNDERSTORMS...POSSIBLY SEVERE LEVELS IN LEMHI COUNTY
AND SW MT EXPECTED LATE TODAY AND THIS EVENING. GOOD JET DYNAMICS HIT SW
MT THIS AFTERNOON...GOOD 300/700MB DIV/CONV OVER ID/MT BORDER SHIFTS
TO SW MT TONIGHT...VORT LOBE THROUGH SW MT TODAY...K INDEX GREATER
THAN 30...LOW LI AND THETA-E ALL IN PLACE FOR THIS AREA. MODERATE
EASTERLY PRESSURE GRADIENT FROM GTF-MSO STILL HOLDING...BUT SHOULD
WEAKEN SOME AS THERMAL TROF MOVES OVER WESTERN MONTANA THIS AFTERNOON.
WILL ADJUST TEMPERATURES COOLER ON THE HIGHS AND WARMER ON THE
MINS WITH MORE CLOUD COVER THROUGH THE PERIOD. FELSCH

FCA 565 74/48/70
LIB 565 70/46/68
POL 565 72/50/70
MSO 565 77/50/74
HMM 565 78/48/76^
.WESTERN MT .NONE.

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 7, 3:04 PM MDTSevere Thunderstorm WarningMSOBeaverhead, Deer Lodge, Granite56 min
Sep 7, 4:05 PM MDTSevere Thunderstorm WarningMSOSilver Bow25 min
Sep 7, 4:33 PM MDTSevere Thunderstorm WarningMSOSilver Bow27 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.