Alert archive / Montana / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 8, NWS Missoula, MT

June 5, 1986Beaverhead County, Deer Lodge County, Silver Bow County, Montana

NWS Missoula, MT issued this severe thunderstorm warning at Jun 5, 1986, 2:12 PM MDT for Beaverhead County, Deer Lodge County, Silver Bow County, Montana. It was in force for 48 min.

The area

The counties it named.

The facts

Issued
Jun 5, 1986, 2:12 PM MDT (20:12 UTC)
Expired
Jun 5, 1986, 3:00 PM MDT
In force
48 min
Issued by
NWS Missoula, MT
Area
Whole counties

Counties Beaverhead County, MT, Deer Lodge County, MT, Silver Bow County, MT

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Great Falls, MT (KGTF), launched 12:00Z, 8.2 hours before the alert went out and 232 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 1986-06-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 50 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 1986-06-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 92 square meters per square second.19395878Sfc1 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
50 J/kg
Mixed-layer CIN
-139 J/kg
Mixed-layer LCL
1187 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
92 m²/s²
0-3 km storm-relative helicity
81 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 KHLN 052012
SVRHLN
MTC001-023-093-052100-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE HELENA MT
212 PM MDT THU JUN 5 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 300 PM MDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES OF

SOUTHWEST MONTANA...NORTHERN BEAVERHEAD...WESTERN DEER LODGE AND 
 SOUTHWEST SILVER BOW

 WEATHER SERVICE RADAR AND ALSO PUBLIC REPORTS INDICATE
A %LARGE AND DARK THUNDERSTORM LOCATED 18 S OF WISDOM,MT.
THIS STORM BLEW OUT SEVERAL WINDOWS AND DOORS OF A RANCH
LOCATED IN THAT AREA. WINDS ARE VERY STRONG IN INTENSITY.

 IF THREATENING WEATHER APPROACHES..TAKE COVER IMMEDIATELY.

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 5, 1:46 PM MDTSevere Thunderstorm WarningMSOGranite, Ravalli59 min

Nearby

Severe Thunderstorm Warnings in Montana, 1986Every severe thunderstorm warning in 1986

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.