Alert archive / Montana / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 2, NWS Great Falls, MT

June 4, 1986Pondera County, Teton County, Montana

NWS Great Falls, MT issued this severe thunderstorm warning at Jun 4, 1986, 4:36 PM MDT for Pondera County, Teton County, Montana. It was in force for 69 min.

The area

The counties it named.

The facts

Issued
Jun 4, 1986, 4:36 PM MDT (22:36 UTC)
Expired
Jun 4, 1986, 5:45 PM MDT
In force
69 min
Issued by
NWS Great Falls, MT
Area
Whole counties

Counties Pondera County, MT, Teton 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, 10.6 hours before the alert went out and 93 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 1986-06-04Temperature 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 1986-06-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -51 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
1021 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
-51 m²/s²
0-3 km storm-relative helicity
-13 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 KGTF 042236
SVRGTF
MTC073-099-042345-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREAT FALLS MT
436 PM MDT WED JUN 4 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 545 PM MDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES OF

NORTH CENTRAL MONTANA...EASTERN PONDERA...EASTERN TETON AND THE CITY 
 OF CONRAD

PUBLIC REPORTS PEAS SIZE HAIL AND WIND GUSTS TO 70 MPH NEAR
CHOTEAU AT ABOUT 4:15 PM MDT. THESE THUNDERSTORMS ARE MOVING
TO THE EAST AT ABOUT 30 MPH.

 IF THREATENING WEATHER APPROACHES..TAKE COVER IMMEDIATELY.

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.