Alert archive / Montana / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 67, NWS Missoula, MT
NWS Missoula, MT issued this severe thunderstorm warning at Sep 10, 1997, 6:00 PM MDT for Beaverhead County, Montana. It was in force for 30 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
- Sep 10, 1997, 6:00 PM MDT (00:00 UTC)
- Expired
- Sep 10, 1997, 6:30 PM MDT
- In force
- 30 min
- Issued by
- NWS Missoula, MT
- Area
- Whole counties
County Beaverhead County, MT
The nearest sounding before it
Great_falls, MT (KTFX), launched 00:00Z, 0.0 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
- 4 J/kg
- Mixed-layer CIN
- -74 J/kg
- Mixed-layer LCL
- 3210 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 36 m²/s²
- 0-3 km storm-relative helicity
- 26 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
693 WUUS1 KMSO 110007 RRA SVRMSO MTC001-110030- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MISSOULA MT 600 PM MDT WED SEP 10 1997 THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 630 PM MDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTHWEST MONTANA ...SOUTHEASTERN BEAVERHEAD COUNTY RADAR INDICATES A SEVERE THUNDERSTORM 10 MILES EAST OF DELL AND IS MOVING TO THE EAST AT 20 MPH. THIS STORM IS CAPABLE OF PRODUCING HAIL IN EXCESS OF 3/4 INCHES. 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 DONT 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 10, 1:53 PM MDT, 4 hours 7 minutes earlier.
Area forecast discussion, Sep 10, 1:53 PM MDT, 4 hours 7 minutes before
WESTERN MONTANA AND NORTH CENTRAL IDAHO FORECAST DISCUSSION NATIONAL WEATHER SERVICE MISSOULA MT 145 PM MDT WED SEP 10 1997 UPPER LEVEL LOW SLOWLY MOVING EAST WITH MAINLY HIGH AND MID LEVEL CLOUDS THIS AFTERNOON. FEW LIGHTNING STRIKES OVER EXTREME SOUTHWEST MONTANA EARLIER. EXPECT BEST CHANCE OF TSTMS OVER IDAHO THROUGH THIS EVENING WHERE BEST INSTABILITY AND THETA-E LOCATED...THEN SOUTHWEST MONTANA ON THURSDAY AS THIS AREA SHIFTS EAST. ACCORDING TO THE NGM...H5 FLOW BECOMES MORE WESTERLY BRINGING IN A DRIER AND STABLE AIR MASS TO IDAHO AND WESTERN MONTANA ON FRIDAY. AVN AND ETA HAVE THE ZONES AT LOT MORE MOIST. THINK AIR MASS WILL SLOWER TO DRY OUT...ESPECIALLY IF UPPER LOW STALLS...THUS WILL LEAN TOWARDS THE ETA AND AVN FOR FRIDAY. THUS KEEP POPS SCATTERED. HARMER ...FORECASTS BELOW ARE PRELIMINARY AND SUBJECT TO CHANGE... LIB .. 045/066 043/064 ... 323443 FCA BB 046/068 044/065 042 323443 POL .. 053/068 051/065 ... 323443 MSO BB 050/072 048/067 044 323443 HMM .. 045/072 047/067 ... 323553 BTM .. 045/070 044/066 ... 323553 S80 .. 058/074 056/069 ... 324443 P69 .. 060/073 058/070 ... 324443 SMN .. 043/079 043/079 ... 323443
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.