Alert archive / Montana / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 57, NWS Missoula, MT
NWS Missoula, MT issued this severe thunderstorm warning at Aug 23, 1997, 4:03 PM MDT for Beaverhead County, Montana. It was in force for 27 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 23, 1997, 4:03 PM MDT (22:03 UTC)
- Expired
- Aug 23, 1997, 4:30 PM MDT
- In force
- 27 min
- Issued by
- NWS Missoula, MT
- Area
- Whole counties
County Beaverhead County, MT
The radar
The Pocatello radar (KSFX), 226 km from the middle of the area, began a volume at 22:05 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Great_falls, MT (KTFX), launched 12:00Z, 10.1 hours before the alert went out and 313 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2922 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 59 m²/s²
- 0-3 km storm-relative helicity
- 152 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KMSO 232204 RRA SVRMSO MTC001-232230- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MISSOULA MT 403 PM MDT SAT AUG 23 1997 THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 430 PM MDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTHWEST MONTANA ...NORTHEASTERN BEAVERHEAD COUNTY AT 4PM NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE THUNDERSTORM IN NORTHEAST BEAVERHEAD COUNTY. THE DILLON AIRPORT REPORTED A WIND GUST OF 53 MPH ASSOCIATED WITH THIS STORM. A SPOTTER REPORTED PEA SIZE HAIL. THIS STORM IS MOVING NORTHEAST AT 20 MPH. AND WILL MOVE INTO MADISON COUNTY BY 4:15 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 WH,ERE WATER COVERS THE ROAD. HOADLEY
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 23, 1:52 PM MDT, 2 hours 11 minutes earlier.
Area forecast discussion, Aug 23, 1:52 PM MDT, 2 hours 11 minutes before
WESTERN MONTANA AND NORTH CENTRAL IDAHO FORECAST DISCUSSION NATIONAL WEATHER SERVICE MISSOULA MT 150 PM MDT SAT AUG 23 1997 VORT AT NORTHEAST CORNER OF CA LOOKS LESS OF A THREAT TO NORTH CENTRAL ID TO CAUSE SHOWERS ESPECIALLY SINCE MOISTURE IS INITIALLY SO LIMITED. NOTHING ON RADARS ATTM AND VISUAL SATELLITE SHOTS SHOW NOTHING UPSTREAM FROM CWA THAT IS READY TO POP YET. SHORTWAVE AT 38N/128W SHOWING ALOT OF NEGATIVE TILT ATTM AND DONT KNOW THAT WILL LAST BUT PREFER MUCH SLOWER ETA/NGM PROGRESSION REGARDING IT. MAJOR DIFFERENCES BETWEEN MODELS OVER THE POSITION OF JET ON SUN. BUT NO MATTER WHICH WE LOOK AT...MSO NORTHWARD TO CANADIAN BORDER WOULD BE IN A FAVORABLE QUADRANT FOR LIFTING. NOT ALOT OF INSTABILITY WITH THIS SYSTEM AND MAY ONLY MENTION ISOLATED THUNDER. SHORTWAVE RIDGE DEVELOPS SUN NIGHT/MON WHILE MOISTURE AND LIFTING MECHANISMS GET SHOVED INTO CANADA...GOING BELOW GUIDANCE POPS THEN. TEMP REBOUND ALSO LOOKS UNDERDONE FOR MON GIVEN THE RISE IN THICKNESS AND 8H TEMPS ON AVN PLUS BETTER SUNSHINE. WILL BE A MARGINAL DAY FOR LAKE WIND ADVISORY FOR TOMORROW...WILL PASS THE WORD ON. GV ...FORECASTS BELOW ARE PRELIMINARY AND SUBJECT TO CHANGE... LIB .. 057/073 044/080 ... 354722 FCA WB 055/073 045/080 047 353721 POL .. 058/074 050/078 ... 353611 MSO EB 056/076 050/083 051 353510 HMM .. 055/078 049/085 ... 353410 BTM .. 052/074 043/079 ... 352410 S80 .. 057/078 048/083 ... 352310 P69 .. 059/080 051/085 ... 352310 SMN .. 050/080 050/083 ... 351210
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; radar from the NEXRAD Level II archive.