Alert archive / Montana / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 39, NWS Missoula, MT
NWS Missoula, MT issued this severe thunderstorm warning at Aug 7, 1997, 2:20 PM MDT for Missoula County, Montana. It was in force for 55 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
- Aug 7, 1997, 2:20 PM MDT (20:20 UTC)
- Expired
- Aug 7, 1997, 3:15 PM MDT
- In force
- 55 min
- Issued by
- NWS Missoula, MT
- Area
- Whole counties
County Missoula County, MT
The nearest sounding before it
Spokane, WA (KOTX), launched 12:00Z, 8.3 hours before the alert went out and 201 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
- 45 J/kg
- Mixed-layer CIN
- -382 J/kg
- Mixed-layer LCL
- 1987 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- -3 m²/s²
- 0-3 km storm-relative helicity
- 85 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KMSO 072020 RRA SVRMSO MTC063-072115- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MISSOULA MT 220 PM MDT THU AUG 7 1997 THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 315 PM MDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN WEST CENTRAL MONTANA ...EASTERN MISSOULA COUNTY AT 220 PM MDT...MISSOULA DOPPLER RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS EXTENDING FROM 5 MILES WEST OF SEELEY LAKE TO JUST EAST OF LOLO. THIS LINE OF STORMS IS MOVING EAST AT 25 MPH AND WILL AFFECT THE TOWNS OF SEELEY LAKE...MILLTOWN AND CLINTON. THIS SEVERE THUNDERSTORM WARNING REPLACES THE SEVERE THUNDERSTORM WARNING ISSUED EARLIER FOR NORTH CENTRAL MISSOULA COUNTY. 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. BELTZ/CLEMMONS
The office that day
Everything else NWS Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 7, 1:35 PM MDT | Severe Thunderstorm Warning | MSO | Flathead | 40 min |
| Aug 7, 2:00 PM MDT | Severe Thunderstorm Warning | MSO | Missoula | 60 min |
| Aug 7, 2:15 PM MDT | Severe Thunderstorm Warning | MSO | Flathead | 60 min |
| Aug 7, 3:00 PM MDT | Severe Thunderstorm Warning | MSO | Powell | 60 min |
| Aug 7, 3:30 PM MDT | Severe Thunderstorm Warning | MSO | Beaverhead, Deer Lodge, Ravalli | 30 min |
| Aug 7, 3:55 PM MDT | Severe Thunderstorm Warning | MSO | Lake | 35 min |
| Aug 7, 4:00 PM MDT | Severe Thunderstorm Warning | MSO | Powell | 45 min |
| Aug 7, 4:30 PM MDT | Severe Thunderstorm Warning | MSO | Flathead | 45 min |
| Aug 7, 4:43 PM MDT | Severe Thunderstorm Warning | MSO | Sanders | 47 min |
| Aug 7, 5:16 PM MDT | Severe Thunderstorm Warning | MSO | Beaverhead | 59 min |
| Aug 7, 5:35 PM MDT | Severe Thunderstorm Warning | MSO | Granite, Missoula, Powell | 55 min |
| Aug 7, 5:35 PM MDT | Severe Thunderstorm Warning | MSO | Lake | 55 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.