Alert archive / Montana / Severe Thunderstorm Warnings in 1992

Severe Thunderstorm Warning 2, NWS Great Falls, MT

July 23, 1992Teton County, Montana

NWS Great Falls, MT issued this severe thunderstorm warning at Jul 23, 1992, 2:08 PM MDT for Teton County, Montana. It was in force for 67 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Jul 23, 1992, 2:08 PM MDT (20:08 UTC)
Expired
Jul 23, 1992, 3:15 PM MDT
In force
67 min
Issued by
NWS Great Falls, MT
Area
Whole counties

County Teton County, MT

What was reported inside it

TimeReportWhereRemark
Jul 23, 2:50 PM MDTHail 1Teton, MT

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Great Falls, MT (KGTF), launched 12:00Z, 8.1 hours before the alert went out and 81 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 1992-07-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 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 1992-07-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 1 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
1692 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
1 m²/s²
0-3 km storm-relative helicity
30 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 232008
SVRGTF
MTC099-232115-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREAT FALLS MT
208 PM MDT THU JUL 23 1992
 
THE NATIONAL WEATHER SERVICE IN GREAT FALLS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  315 PM MDT
FOR PEOPLE IN THE FOLLOWING LOCATION......
 
IN NORTH CENTRAL MONTANA
 
   ...TETON COUNTY
 
RADAR INDICATED A SEVERE THUNDERSTORM NEAR CHOTEAU MONTANA.
COOPERATIVE OBSERVERS REPORT 3/4 INCH HAIL AND HEAVY RAIN JUST BEFORE
2PM MDT. THIS STORM WAS MOVING TOWARD THE NORTH NORTHEAST AT 25 MPH.
 
 
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 THUNDERSTORMS.
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
Jul 23, 2:59 PM MDTSevere Thunderstorm WarningTFXPondera46 min
Jul 23, 3:10 PM MDTSevere Thunderstorm WarningTFXFergus50 min
Jul 23, 3:33 PM MDTSevere Thunderstorm WarningTFXChouteau57 min
Jul 23, 4:10 PM MDTSevere Thunderstorm WarningTFXLiberty20 min
Jul 23, 4:24 PM MDTSevere Thunderstorm WarningTFXPetroleum51 min
Jul 23, 4:55 PM MDTSevere Thunderstorm WarningTFXHill65 min
Jul 23, 5:20 PM MDTSevere Thunderstorm WarningTFXBlaine70 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.