Alert archive / Montana / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 61, NWS Missoula, MT
NWS Missoula, MT issued this severe thunderstorm warning at Sep 5, 1997, 5:58 PM MDT for Lake County, Sanders County, Montana. It was in force for 62 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Sep 5, 1997, 5:58 PM MDT (23:58 UTC)
- Expired
- Sep 5, 1997, 7:00 PM MDT
- In force
- 62 min
- Issued by
- NWS Missoula, MT
- Area
- Whole counties
Counties Lake County, MT, Sanders County, MT
The radar
The Missoula radar (KMSX), 83 km from the middle of the area, began a volume at 00:01 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Sep 5, 6:08 PM MDT | Hail 1.75 | Dixon, MT |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The nearest sounding before it
Spokane, WA (KOTX), launched 12:00Z, 12.0 hours before the alert went out and 134 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
- 5 J/kg
- Mixed-layer CIN
- -342 J/kg
- Mixed-layer LCL
- 1274 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 95 m²/s²
- 0-3 km storm-relative helicity
- -320 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 060004 RRA SVRMSO MTC047-089-060100- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MISSOULA MT 558 PM MDT FRI SEP 5 1997 THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 700 PM MDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN WEST CENTRAL MONTANA ...SOUTHERN LAKE COUNTY...EASTERN SANDERS COUNTY A SEVERE THUNDERSTORM WAS LOCATED 4 MILES SOUTHEAST OF DIXON MOVING TO THE NORTHEAST AT 30 MPH. IT WILL MOVE INTO SOUTHERN LAKE COUNTY 12 MILES SOUTH OF RONAN BY 620 PM MDT. RADAR INDICTATES THIS STORM CAN PRODUCE ONE INCH DIAMETER OR LARGER AND 60 MPH WINDS. 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.
NWS Missoula, MT wrote its last area forecast discussion before this severe thunderstorm warning went out at Sep 5, 1:45 PM MDT, 4 hours 13 minutes earlier.
Area forecast discussion, Sep 5, 1:45 PM MDT, 4 hours 13 minutes before
WESTERN MONTANA AND NORTH CENTRAL IDAHO FORECAST DISCUSSION NATIONAL WEATHER SERVICE MISSOULA MT 145 PM MDT FRI SEP 5 1997 MODELS INITIALIZED POORLY WITH ONLY THE ETA HINTING AT THE VORTS TO THE SOUTH...ONE IN SOUTH CENTRAL OR AND THE OTHER OVER SOUTHERN ID. BOTH VORTS TRACKING TO THE NORTHEAST ATTM. BASED FCST ON ETA BECAUSE OF VORT POSITIONS AND ITS MOISTURE PROG SEEMS THE MORE REASONABLE. PANHANDLE/NW AND WEST CENTRAL MT FAVORED AREAS FOR SIG WX THIS AFTERNOON/EVENING GIVEN CAPE...LIS AND CON/DIV COUPLET. HOWEVER... ID VORT SEEMS THE MORE ACTIVE AS SOME CONVECTION FIRING OVER SOUTH CENTRAL ID ATTM. UPPER LEVEL DISCONTINUITY SEEN ON WV PICS MOVING THRU EASTERN WA. EXPECT THIS FEATURE AND SURFACE TROF TO BE EDVD AFTER MIDNIGHT. ACTIVITY TODAY SHOULD BE HIGH BASED WITH GUSTY WINDS ACCOMPANYING TSTMS. ANALYSIS PAST 24 HRS SHOWS WEST COAST H5 TROF FILLING AS ADVERTISED BY LAST SEVERAL MODEL RUNS. TROF ROTATES INTO SASK WITH SHORTWAVE RIDGING OVER NORTHERN ROCKIES SATURDAY NIGHT/SUNDAY. SW FLOW ALOFT INCREASING ON SUNDAY AHEAD OF NEXT TROF. AVN HINTING AT S/WV MOVING INTO SW MT BY AFTERNOON. FOSS ...FORECASTS BELOW ARE PRELIMINARY AND SUBJECT TO CHANGE... LIB .. 050/072 042/072 ... 315211 FCA EB 048/072 042/072 043 314211 POL .. 054/075 050/075 ... 313101 MSO BA 050/077 045/077 043 314102 HMM .. 048/079 042/079 ... 313102 BTM .. 046/075 042/078 ... 313202 S80 .. 049/075 054/078 ... 313101 P69 .. 052/077 054/080 ... 314101 SMN .. 047/075 044/080 ... 313102
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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.