Alert archive / Montana / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 4, NWS Missoula, MT

June 6, 1994Lewis and Clark County, Montana

NWS Missoula, MT issued this severe thunderstorm warning at Jun 6, 1994, 3:32 PM MDT for Lewis and Clark County, Montana. It was in force for 23 min.

The area

The counties it named.

The facts

Issued
Jun 6, 1994, 3:32 PM MDT (21:32 UTC)
Expired
Jun 6, 1994, 3:55 PM MDT
In force
23 min
Issued by
NWS Missoula, MT
Area
Whole counties

County Lewis and Clark County, MT

The nearest sounding before it

Great Falls, MT (KGTF), launched 12:00Z, 9.5 hours before the alert went out and 91 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, Great Falls, MT at 12:00Z on 1994-06-06Temperature 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, Great Falls, MT at 12:00Z on 1994-06-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 46 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
2239 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
46 m²/s²
0-3 km storm-relative helicity
125 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 
WUUS1 KHLN 062133
SVRTFX
MTC049-062200-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE HELENA MT
332 PM MDT MON JUN 6 1994
 
THE NATIONAL WEATHER SERVICE IN HELENA MT     HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  400 PM MDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTHWEST MONTANA
 
   ...SOUTHEASTERN LEWIS AND CLARK COUNTY
 
AT 310 THIS AFTERNOON, HAIL EXCEEDING 1 INCH IN SIZE
FELL IN SOUTHERN POWELL COUNTY, AS REPORTED BY A SPOTTER
SOUTH OF THE TOWN OF DEER LODGE. THIS STORM IS MOVING NORTHEAST
AT ABOUT 20 MPH.
 
WILLMAN
 
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.
 
 
 
&

Nearby

Severe Thunderstorm Warnings in Montana, 1994Every severe thunderstorm warning in 1994

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.