Alert archive / Montana / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 11, NWS Great Falls, MT

June 4, 1997Toole County, Montana

NWS Great Falls, MT issued this severe thunderstorm warning at Jun 4, 1997, 8:01 PM MDT for Toole County, Montana. It was in force for 44 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jun 4, 1997, 8:01 PM MDT (02:01 UTC)
Expired
Jun 4, 1997, 8:45 PM MDT
In force
44 min
Issued by
NWS Great Falls, MT
Area
Whole counties

County Toole County, MT

The nearest sounding before it

Great_falls, MT (KTFX), launched 00:00Z, 2.0 hours before the alert went out and 156 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 00:00Z on 1997-06-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 799 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 00:00Z on 1997-06-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 76 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
799 J/kg
Mixed-layer CIN
-108 J/kg
Mixed-layer LCL
2114 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
76 m²/s²
0-3 km storm-relative helicity
208 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KGTF 050203 RRA
SVRGTF
MTC101-050245-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREAT FALLS MT
801 PM MDT WED JUN 4 1997
 
THE NATIONAL WEATHER SERVICE IN GREAT FALLS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  845 PM MDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN NORTH MONTANA
 
   ...NORTHERN TOOLE COUNTY
 
RADAR INDICATES A SEVERE THUNDERSTORM 20 MILES NORTH OF SHELBY...MOVING
NORTHEAST AT 25 MPH. LARGE HAIL AND HEAVY RAIN IS EXPECTED WITH THIS
STORM.
 
IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A
STRONG BUILDING.  DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...
AND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERST"ORMS.
STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 4, 6:07 PM MDTSevere Thunderstorm WarningTFXLewis and Clark68 min
Jun 4, 6:11 PM MDTSevere Thunderstorm WarningTFXPondera, Teton64 min
Jun 4, 7:14 PM MDTSevere Thunderstorm WarningTFXPondera, Teton, Toole61 min
Jun 4, 7:53 PM MDTSevere Thunderstorm WarningTFXChouteau37 min
Jun 4, 8:36 PM MDTSevere Thunderstorm WarningTFXCascade54 min
Jun 5, 12:15 AM MDTSevere Thunderstorm WarningTFXJudith Basin45 min
Jun 5, 3:49 PM MDTSevere Thunderstorm WarningTFXCascade, Meagher56 min

Nearby

Severe Thunderstorm Warnings in Montana, 1997Every severe thunderstorm warning in 1997

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.