Alert archive / Montana / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 38, NWS Missoula, MT
NWS Missoula, MT issued this severe thunderstorm warning at Aug 7, 1997, 2:15 PM MDT for Flathead County, Montana. It was in force for 60 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, 2:15 PM MDT (20:15 UTC)
- Expired
- Aug 7, 1997, 3:15 PM MDT
- In force
- 60 min
- Issued by
- NWS Missoula, MT
- Area
- Whole counties
County Flathead County, MT
The nearest sounding before it
Spokane, WA (KOTX), launched 12:00Z, 8.3 hours before the alert went out and 187 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.
435 WUUS1 KMSO 072015 SVRMSO MTC029-072115- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MISSOULA MT 215 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 NORTHWEST MONTANA ...EASTERN FLATHEAD COUNTY AT 215 PM MDT...MISSOULA DOPPLER CONTINUED TO INDICATE A SEVERE THUNDERSTORM 18 MILES EAST OF KALISPELL. THIS STORM IS MOVING TO EAST-NORTHEAST AT 25 MPH AND WILL PASS JUST SOUTH OF ESSEX BY 230 PM MDT. PING PONG BALL SIZE HAIL WAS REPORTED WITH THIS STORM EARLIER. IN ADDITION TO LARGE HAIL...SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH...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 DONT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. BELTZ/CLEMMONS
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.
NWS Missoula, MT wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 7, 1:45 PM MDT, 30 minutes earlier.
Area forecast discussion, Aug 7, 1:45 PM MDT, 30 minutes before
WESTERN MONTANA AND NORTH CENTRAL IDAHO FORECAST DISCUSSION NATIONAL WEATHER SERVICE MISSOULA MT 145 PM MDT THU AUG 7 1997 SFC FRONT STILL EXTENDS FROM EXTREME NORTHWEST MT TO SOUTHEAST WA. ISOLATED TSTMS IN PANHANDLE AND NORTHWEST MONTANA WITH FIRST WARNING JUST ISSUED FOR STORM NEAR FCA. BUILDUPS STILL OCCURRING AHEAD OF FRONT OVER CENTRAL ID/SOUTHWEST MT SO NOT OUT OF WOODS YET IN THESE AREAS SINCE FRONT/ASSOCIATED SHORTWAVE STILL YET TO PUSH EAST...WHICH SHOULD TRIGGER SCATTERED TSTMS IN THESE AREAS BY LATE AFTERNOON DUE TO VERY UNSTABLE ATMOSPHERE. BECOMING COOL AND DRY BEHIND FRONT BUT CHANNELED VORT WITH SOME MOISTURE WORKING THROUGH WEST MONTANA LATER FRIDAY INTO SATURDAY. DYNAMICS LACKING SO MAY ONLY MENTION ISOLATED SHOWERS OVER THE NORTHERN MOUNTAINS. BELTZ ...FORECASTS BELOW ARE PRELIMINARY AND SUBJECT TO CHANGE... LIB .. 047/074 045/073 ... 2710-1 FCA BB 049/075 046/073 046 2710-1 POL .. 053/077 051/075 ... 271001 MSO BB 052/080 048/078 048 27200- HMM .. 049/082 046/080 ... 272000 BTM .. 048/080 045/077 ... 273000 S80 .. 056/081 051/080 ... 271000 P69 .. 058/083 053/082 ... 272000 SMN .. 050/083 047/082 ... 272000
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, 2:20 PM MDT | Severe Thunderstorm Warning | MSO | Missoula | 55 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.