Alert archive / Montana / Severe Thunderstorm Warnings in 1992
Severe Thunderstorm Warning 7, NWS Missoula, MT
NWS Missoula, MT issued this severe thunderstorm warning at Jul 22, 1992, 7:03 PM MDT for Granite County, Missoula County, Ravalli County, Montana. It was in force for 42 min.
The area
The counties it named.
The facts
- Issued
- Jul 22, 1992, 7:03 PM MDT (01:03 UTC)
- Expired
- Jul 22, 1992, 7:45 PM MDT
- In force
- 42 min
- Issued by
- NWS Missoula, MT
- Area
- Whole counties
Counties Granite County, MT, Missoula County, MT, Ravalli County, MT
The nearest sounding before it
Great Falls, MT (KGTF), launched 00:00Z, 1.1 hours before the alert went out and 220 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.
- Mixed-layer CAPE
- 276 J/kg
- Mixed-layer CIN
- -42 J/kg
- Mixed-layer LCL
- 2232 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 9 m²/s²
- 0-3 km storm-relative helicity
- 58 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KMSO 230104 SVRMSO MTC039-063-081-230145- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MISSOULA MT 703 PM MDT WED JUL 22 1992 THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 745 PM MDT FOR PEOPLE IN THE FOLLOWING LOCATIONS...S... IN WEST CENTRAL MONTANA ...GRANITE COUNTY...EASTERN MISSOULA COUNTY...NORTHERN RAVALLI COUN SHORTLY BEFORE 7 PM MDT THE PUBLIC REPORTED HEAVY RAIN...FREQUENT LIGHTENING...ESTIMATED WINDS GUSTING TO NEAR 60 MPH ALONG WITH THREE EIGHTS INCH HAIL SIX MILES NORTH OF THE TOWN OF CORVALLIS IN RAVALLI COUNTY OF MONTANA. THIS IS A SEVERE THUNDERSTORM AND WAS MOVING TO THE NORTHEAST AT 25 TO 30 MPH. SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, Jul 22, 4:56 PM MDT, 2 hours 7 minutes before
MTZ002-230045- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE MISSOULA MT 5 PM MDT WED JUL 22 1992 AT 430 PM MISSOULA WEATHER RADAR INDICATED STRONG THUNDERSTORM ACTIVITY IN CENTRAL IDAHO. THESE THUNDERSTORMS WERE MOVING TO THE NORTHEAST AT 25 TO 30 MPH. WITH THIS MOVEMENT THUNDERSTORMS COULD BE IN SOUTHWEST RAVALLI COUNTY OF MONTANA IN THE NEXT HOUR OR SO...AND IN THE MISSOULA AREA LATER THIS EVENING. THE AIRMASS OVER WESTERN MONTANA IS QUITE UNSTABLE AND THE POTENTIAL FOR STRONG THUNDERSTORMS IS HIGH. THESE THUNDERSTORMS COULD CONTAIN SOME HEAVY RAIN...SMALL HAIL... STRONG GUSTY WINDS AND DANGEROUS LIGHTNING. STAY TUNED TO NOAA WEATHER RADIO AND YOUR LOCAL T.x V. OR RADIO STATIONS FOR MORE INFORMATION. END/RON
Special weather statement, Jul 22, 5:50 PM MDT, 1 hour 13 minutes before
MTZ002-230200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MISSOULA MT 6 PM MDT WED JUL 22 1992 A LOW PRESSURE CENTER IN WESTERN OREGON CONTINUES TO MOVE INLAND. THE ATMOSPHERE OVER WEST MONTANA WAS PROGRESSIVELY BECOMING MORE MOIST AND UNSTABLE. THIS EVENING...CONDITIONS APPEAR RIPE FOR STRONG STORM DEVELOPMENT. AT 6 PM...SATELLITE PHOTOS AND RADAR REPORTS SHOW STORM ACTIVITY OVER IDAHO MOVING INTO WEST MONTANA. THIS EVENING...THUNDERSTORMS WILL ENGAGE THE SOUTHERN AND CENTRAL SECTIONS WEST OF THE DIVIDE THEN MOVE TO THE NORTH AND EAST. REMEMBER...THUNDERSTORMS CAN PRODUCE DEADLY LIGHTNING...HEAVY RAINS... DAMAGING WINDS AND HAIL. PREPARE TO SEEK SHELTER IF THREATENING WEATHER SHOULD DEVELOP. STAY TUNED TO NOAA WEATHER RADIO AND YOUR LOCAL T.V. OR RADIO STATIONS FOR ADDITIONAL INFORMATION. END/GH
Special weather statement, Jul 22, 6:39 PM MDT, 24 minutes before
MTZ002-230700- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MISSOULA MT 6 PM MDT WED JUL 22 1992 AT 615 PM...A SEVERE THUNDERSTORM WATCH EFFECTIVE UNTIL 12 MIDNIGHT WAS ISSUED FOR THE FOLLOWING COUNTIES IN WEST CENTRAL MONTANA: RAVALLI...MISSOULA...GRANITE...POWELL AND MINERAL. A LOW PRESSURE CENTER IN WESTERN OREGON CONTINUES TO MOVE INLAND. THE ATMOSPHERE OVER WEST MONTANA WAS PROGRESSIVELY BECOMING MORE MOIST AND UNSTABLE. CONDITIONS APPEAR RIPE FOR STRONG STORM DEVELOPMENT. AT 6 PM...SATELLITE PHOTOS AND RADAR REPORTS SHOW STORM ACTIVITY OVER IDAHO MOVING INTO WEST MONTANA. THIS EVENING...THUNDERSTORMS WILL ENGAGE THE SOUTHERN AND CENTRAL SECTIONS WEST OF THE DIVIDE THEN MOVE TO THE NORTH AND EAST. REMEMBER...THUNDERSTORMS CAN PRODUCE DEADLY LIGHTNING...HEAVY RAINS... DAMAGING WINDS AND HAIL. PREPARE TO SEEK SHELTER IF THREATENING WEATHER SHOULD DEVELOP. STAY TUNED TO NOAA WEATHER RADIO AND YOUR LOCAL T.V. OR RADIO STATIONS. FOR ADDITIONAL INFORMATION. END/GH
The office that day
Everything else NWS Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 22, 8:19 PM MDT | Severe Thunderstorm Warning | MSO | Lake, Mineral, Missoula, Sanders | 56 min |
| Jul 22, 8:19 PM MDT | Severe Thunderstorm Warning | MSO | Granite, Ravalli | 56 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.