Alert archive / Montana / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 2, NWS Missoula, MT

May 15, 1994Lake County, Montana

NWS Missoula, MT issued this severe thunderstorm warning at May 15, 1994, 5:07 PM MDT for Lake County, Montana. It was in force for 68 min.

The area

The counties it named.

The facts

Issued
May 15, 1994, 5:07 PM MDT (23:07 UTC)
Expired
May 15, 1994, 6:15 PM MDT
In force
68 min
Issued by
NWS Missoula, MT
Area
Whole counties

County Lake County, MT

The nearest sounding before it

Spokane, WA (KOTX), launched 12:00Z, 11.1 hours before the alert went out and 173 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 1994-05-15Temperature 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 1994-05-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 45 square meters per square second.1939587897117Sfc1 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
924 m above ground
0-6 km bulk shear
66 kt
0-1 km storm-relative helicity
45 m²/s²
0-3 km storm-relative helicity
409 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 KMSO 152306 RRA
SVRMSO
MTC047-160015-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MISSOULA MT
507 PM MDT SUN MAY 15 1994
 
THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  615 PM MDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS......
 
IN WEST CENTRAL MONTANA
 
   ...NORTHERN LAKE COUNTY
 
STRONG THUNDERSTORM WINDS HAVE BEEN REPORTED IN NORTHEASTERN SANDERS
COUNTY. THESE THUNDERSTORMS ARE MOVING TOWARDS THE NORTHEAST AT ABOUT 20
MILES AN HOUR AND SHOULD REACH WESTERN LAKE COUNTY WITHIN THE NEXT 30
MINUTES. NUMEROUS TREES AND POWER POLES HAVE BEEN REPORTED DOWNED BY THE
SHERIFF'S OFFICE IN SANDERS COUNTY.
 
WHEN THUNDERSTORMS ARE OCCURRING...PEOPLE SHOULD MOVE INSIDE A
STRONG BUILDING.  DO NOT STAND BY WINDOWS.  DON'T USE TELEPHONES
OR ELECTRICAL APPLIANCES UNLESS IN AN EMERGENCY UNTIL THE STORM
HAS PASSED.  MOTORISTS SHOULD NOT DRIVE INTO LOW WATER CROSSINGS.

The office that day

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

IssuedProductOfficeCountiesLasted
May 15, 4:42 PM MDTSevere Thunderstorm WarningMSOSanders63 min
May 15, 5:38 PM MDTSevere Thunderstorm WarningMSOFlathead67 min

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.