Alert archive / Montana / Tornado Warnings in 1991

Tornado Warning 5, NWS Great Falls, MT

June 29, 1991Glacier County, Toole County, Montana

NWS Great Falls, MT issued this tornado warning at Jun 29, 1991, 4:45 PM MDT for Glacier County, Toole County, Montana. It was in force for 60 min.

The area

The counties it named.

The facts

Issued
Jun 29, 1991, 4:45 PM MDT (22:45 UTC)
Expired
Jun 29, 1991, 5:45 PM MDT
In force
60 min
Issued by
NWS Great Falls, MT
Area
Whole counties

Counties Glacier County, MT, Toole County, MT

The nearest sounding before it

Great Falls, MT (KGTF), launched 12:00Z, 10.8 hours before the alert went out and 154 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 1991-06-29Temperature 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 1991-06-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 10 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
50 J/kg
Mixed-layer CIN
-197 J/kg
Mixed-layer LCL
1376 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
10 m²/s²
0-3 km storm-relative helicity
72 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 292245
TORGTF
MTC035-101-292345-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO AND FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE GREAT FALLS MT
445 PM MDT SAT JUN 29 1991
 
THE NATIONAL WEATHER SERVICE IN GREAT FALLS HAS ISSUED A
TORNADO AND FLASH FLOOD WARNING EFFECTIVE UNTIL  545 PM MDT
FOR PEOPLE IN THE FOLLOWING LOCATION...S...
 
IN NORTH CENTRAL MONTANA
 
   ...EASTERN GLACIER COUNTY...TOOLE COUNTY
 
CUTBANK SHERIFF OBSERVED A FUNNEL CLOUD NORTH OF CUTBANK AND HIGWAY
PATROL OBSERVED GOLF BALL SIZE HAIL EAST OF CUTBANK
 
 
IF YOU ARE IN THE PATH OF A TORNADO...THE SAFEST PLACE IS A
BASEMENT.  GET UNDER A WORKBENCH OR PIECE OF STURDY FURNITURE.
IF NO BASEMENT IS AVAILABLE...SEEK SHELTER IN AN INTERIOR ROOM
SUCH AS A CLOSET ON THE LOWEST FLOOR.  USE BLANKETS...PILLOWS...
OR CUSHIONS TO COVER YOUR BODY.  AVOID WINDOWS.

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 29, 4:50 PM MDTSevere Thunderstorm WarningTFXChouteau55 min
Jun 29, 5:24 PM MDTTornado WarningTFXFergus, Judith Basin66 min
Jun 29, 5:25 PM MDTSevere Thunderstorm WarningTFXHill, Liberty95 min

Nearby

Tornado Warnings in Montana, 1991Every tornado warning in 1991Tornadoes in 1991

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.