Alert archive / Montana / Severe Thunderstorm Warnings in 1992

Severe Thunderstorm Warning 2, NWS Missoula, MT

June 28, 1992Ravalli County, Montana

NWS Missoula, MT issued this severe thunderstorm warning at Jun 28, 1992, 1:42 PM MDT for Ravalli County, Montana. It was in force for 63 min.

The area

The counties it named.

The facts

Issued
Jun 28, 1992, 1:42 PM MDT (19:42 UTC)
Expired
Jun 28, 1992, 2:45 PM MDT
In force
63 min
Issued by
NWS Missoula, MT
Area
Whole counties

County Ravalli County, MT

The nearest sounding before it

Great Falls, MT (KGTF), launched 12:00Z, 7.7 hours before the alert went out and 265 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 1992-06-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 51 joules per kilogram.LCLLFCEL10008507005003002001001 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 1992-06-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -3 square meters per square second.1939Sfc1 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
51 J/kg
Mixed-layer CIN
-35 J/kg
Mixed-layer LCL
743 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
-3 m²/s²
0-3 km storm-relative helicity
32 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 281944 COR
SVRMSO
BULLETIN-EBS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING CORRECTED
NATIONAL WEATHER SERVICE MISSOULA, MT
143 PM MDT SUN JUN 28 1992
MTC081-282045-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MISSOULA MT
142 PM MDT SUN JUN 28 1992

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 245 PM MDT FOR PEOPLE IN THE FOLLOWING
COUNTIES

   IN THE WEST CENTRAL PART OF MONTANA:
      SOUTH CENTRAL RAVALLI...NEAR THE CITY OF DARBY

AT 130 PM MISSOULA RADAR DETECTED A SEVERE THUNDERSTORM ON THE
SOUTHWEST EDGE OF RAVALLI COUNTY NEAR TRAPPER PEAK.  THIS STORM IS
MOVING TO THE NORTHEAST AT 15 TO 20 MPH AND WILL PASS JUST TO THE
SOUTH OF DARBY WITHIN AN HOUR.  THIS STORM IS DANGEROUS AND WILL
LIKELY CONTAIN LARGE HAIL..HEAVY RAIN..AND STRONG WINDS.

 PEOPLE IN SOUTH-CENTRAL RAVALLI COUNTY...ESPECIALLY BETWEEN DARBY AND
 CONNOR SHOULD WATCH FOR THE APPPROACHING DANGEROUS STORM AND TAKE
 COVER IF NECESSARY.  REMEMBER...LIGHTNING IS ONE OF THE BIGGEST
 WEATHER-RELATED KILLERS.

END/RICHMOND

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 28, 3:10 PM MDTSevere Thunderstorm WarningMSOMissoula65 min
Jun 28, 3:15 PM MDTSevere Thunderstorm WarningMSOGranite60 min

Nearby

Severe Thunderstorm Warnings in Montana, 1992Every severe thunderstorm warning in 1992

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.