Alert archive / Montana / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 34, NWS Missoula, MT
NWS Missoula, MT issued this severe thunderstorm warning at Aug 5, 1997, 5:10 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 5, 1997, 5:10 PM MDT (23:10 UTC)
- Expired
- Aug 5, 1997, 6:10 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, 11.2 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
- 136 J/kg
- Mixed-layer CIN
- -304 J/kg
- Mixed-layer LCL
- 2380 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- -18 m²/s²
- 0-3 km storm-relative helicity
- 31 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KMSO 052311 RRA SVRMSO MTC029-060010- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MISSOULA MT 510 PM MDT TUE AUG 5 1997 THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 610 PM MDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN NORTHWEST MONTANA ...NORTHERN FLATHEAD COUNTY AT 510 PM MDT DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 6 MILES WEST OF POLEBRIDGE IN THE HAY CREEK DRAINAGE. THIS STORM IS MOVING NORTHWEST AT 5 MPH. IT WILL PRODUCE HEAVY RAIN OVER HAY CREEK AND RED MEADOW CREEK DURING THE NEXT HOUR. SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH...DESTRUCTIVE HAIL...DEADLY LI^GHTNING...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. WHITMORE/FELSCH
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 5, 1:50 PM MDT, 3 hours 20 minutes earlier.
Area forecast discussion, Aug 5, 1:50 PM MDT, 3 hours 20 minutes before
WESTERN MONTANA AND NORTH CENTRAL IDAHO FORECAST DISCUSSION NATIONAL WEATHER SERVICE MISSOULA MT 145 PM MDT TUE AUG 5 1997 UPPER LOW MOVING SOUTHEAST TOWARD SOUTHEAST CORNER OF ID. BUT VISUAL SATELLITE IMAGES IMPLY MOISTURE AXIS SETTING UP ALONG ID/MT BORDER WHERE MODELS INDICATE IT WEAKENING THROUGH 36 HOURS. MEANWHILE THE VISUALS SHOW HIGH CLOUDS THINNING TO REVEAL SOME BUILDUPS UNDERNEATH WHILE CONVECTION IS A LITTLE MORE ADVANCED AROUND THE FRINGES...AND A MINOR CIRCULATION BEGINNING TO MOVE SOUTHEAST ON WEST SIDE OF LEMHI COUNTY ID. HAVE NOT BEEN IMPRESSED BY PRECIP IN BEAVERHEAD...AND WOULD THINK THE SMALL STREAMS WERE ALMOST DRY BEFORE THIS. HIGHEST PRECIP TOTAL ON AVAILABLE GAGES HAVE BEEN ABOUT 3/4 INCH IN 18 HOURS. CALLED UP THE NESDIS INTERNET GRAPHIC REFERRED TO IN THEIR PRECIP ESTIMATE MESSAGE AND THERE APPEARED TO BE A PINPOINT LOCATION IN NORTHWEST BEAVERHEAD WHERE AN INCH WAS RECEIVED BUT GAGES IN GENERAL VICINITY SHOW VERY LITTLE PRECIP SINCE YESTERDAY. IN A NUTSHELL...AM NOT CURRENTLY CONCERNED ABOUT FLOODING THERE. BEGINNING WED...WOULD LIKE TO DROP POPS BELOW GUIDANCE ON ONE HAND...BUT HIGH SURFACE DEW POINTS AND INSTABILITY TO STICK AROUND UFN...AND MAY STILL BE HERE AS COOL FRONT ARRIVES ON THU. SOME DIFFERENCES IN BETWEEN NGM AND THE ETA/AVN "ALLIANCE" REGARDING SHORTWAVES IN WESTERLY FLOW AND WILL DISREGARD THE NGM HERE. BUT PREFER THE SLOWER COOL DOWN OF MOS TEMPS. WILL INCLUDE MINIMAL MENTION OF WIND FOR THU AFTERNOON IN MT ZONES. GV ...FORECASTS BELOW ARE PRELIMINARY AND SUBJECT TO CHANGE... LIB .. 053/092 053/083 ... 353223 FCA EE 054/090 054/083 052 353223 POL .. 057/088 057/083 ... 353222 MSO EE 059/090 058/085 053 354222 HMM .. 058/090 058/087 ... 354222 BTM .. 053/081 052/082 ... 355222 S80 .. 059/085 057/081 ... 353312 P69 .. 063/088 060/083 ... 355323 SMN .. 059/083 056/084 ... 355321
The office that day
Everything else NWS Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 4, 6:15 PM MDT | Severe Thunderstorm Warning | MSO | Flathead | 60 min |
| Aug 4, 7:25 PM MDT | Severe Thunderstorm Warning | MSO | Flathead | 50 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.