Alert archive / Montana / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 43, NWS Missoula, MT
NWS Missoula, MT issued this severe thunderstorm warning at Jul 31, 1998, 6:25 PM MDT for Missoula 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
- Jul 31, 1998, 6:25 PM MDT (00:25 UTC)
- Expired
- Jul 31, 1998, 7:25 PM MDT
- In force
- 60 min
- Issued by
- NWS Missoula, MT
- Area
- Whole counties
County Missoula County, MT
The nearest sounding before it
Spokane, WA (KOTX), launched 00:00Z, 0.4 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
- 204 J/kg
- Mixed-layer CIN
- -25 J/kg
- Mixed-layer LCL
- 963 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 10 m²/s²
- 0-3 km storm-relative helicity
- 34 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
843 WUUS1 KMSO 010028 RRA SVRMSO MTC063-010125- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MISSOULA MT 625 PM MDT FRI JUL 31 1998 THE NATIONAL WEATHER SERVICE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... CENTRAL MISSOULA COUNTY IN WEST CENTRAL MONTANA * UNTIL 725 PM MDT * AT 625 PM MDT...SEVERE THUNDERSTORM INDICATED 5 MILES SOUTH OF MISSOULA...BY NATIONAL WEATHER SERVICE DOPPLER RADAR...MOVING NORTH AT 15 MPH. * SEVERE THUNDERSTORM WILL BE NEAR... MISSOULA AT 630 PM MDT 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 DO NOT 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 Jul 31, 2:45 PM MDT, 3 hours 40 minutes earlier.
Area forecast discussion, Jul 31, 2:45 PM MDT, 3 hours 40 minutes before
WESTERN MONTANA AND NORTH CENTRAL IDAHO FORECAST DISCUSSION NATIONAL WEATHER SERVICE MISSOULA MT 245 PM MDT FRI JUL 31 1998 IMPRESSIVE TROF OVER CENTRAL WA..0R..N NV TODAY EXPECTED TO MOVE SLOWLY EASTWARD NEXT 24-36 HOURS. MAIN ENERGY AND DYNAMICS WITH THE SYSTEM WILL TRACK NORTH THIS AFTERNOON AND TONIGHT WITH ID AND NW MT ZONES UNDER BIGGEST THREAT FOR WET THUNDERSTORMS. FLASH FLOOD WATCH IN EFFECT FOR IDAHO ZONES TIL MIDNIGHT DUE TO AMOUNT OF AVAILABLE MOISTURE AND LACK OF WIND TO MOVE STORMS ALONG VERY FAST. CLOUD COVER WILL KEEP TEMPS MILD TONIGHT AND SATURDAY. RIDGE BEGINS TO PUSH INTO THE COLUMBIA BASIN AND BY EARLY SUNDAY SHOULD PROVIDE DRYING AND WARMING LATE IN THE WEEKEND...HOWEVER...LONGER TERM KEEPS FEATURES TRANSITORY WITH MORE SHOWERS-THUNDERSHOWERS LIKELY BY THE MIDDLE OF NEXT WEEK. DWG ...FORECASTS BELOW ARE PRELIMINARY AND SUBJECT TO CHANGE... LIB .. 058/078 055/082 ... 376621 FCA EB 058/077 053/080 051 3766\21 POL .. 058/077 054/081 ... 376621 MSO EB 057/078 052/081 052 376621 HMM .. 058/080 052/082 ... 376521 BTM .. 053/072 050/074 ... 376422 S80 .. 059/081 057/085 ... 377411 P69 .. 060/081 058/086 ... 377411 SMN .. 054/076 054/082 ... 376411
Nearby
Severe Thunderstorm Warnings in Montana, 1998Every severe thunderstorm warning in 1998
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.