Alert archive / Montana / Severe Thunderstorm Warnings in 1992

Severe Thunderstorm Warning 9, NWS Great Falls, MT

July 23, 1992Blaine County, Montana

NWS Great Falls, MT issued this severe thunderstorm warning at Jul 23, 1992, 5:20 PM MDT for Blaine County, Montana. It was in force for 70 min.

The area

The counties it named.

The facts

Issued
Jul 23, 1992, 5:20 PM MDT (23:20 UTC)
Expired
Jul 23, 1992, 6:30 PM MDT
In force
70 min
Issued by
NWS Great Falls, MT
Area
Whole counties

County Blaine County, MT

The nearest sounding before it

Great Falls, MT (KGTF), launched 12:00Z, 11.3 hours before the alert went out and 204 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

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 23, 2:08 PM MDTSevere Thunderstorm WarningTFXTeton67 min
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

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; the sounding from the Mesonet's radiosonde archive.