Alert archive / Montana / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 33, NWS Missoula, MT
NWS Missoula, MT issued this severe thunderstorm warning at Aug 4, 1997, 7:25 PM MDT for Flathead County, Montana. It was in force for 50 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 4, 1997, 7:25 PM MDT (01:25 UTC)
- Expired
- Aug 4, 1997, 8:15 PM MDT
- In force
- 50 min
- Issued by
- NWS Missoula, MT
- Area
- Whole counties
County Flathead County, MT
The nearest sounding before it
Spokane, WA (KOTX), launched 00:00Z, 1.4 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
- 785 J/kg
- Mixed-layer CIN
- -124 J/kg
- Mixed-layer LCL
- 3101 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 17 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.
000 TTAA00 KMSO 050125 RRA SVRMSO MTC029-050225- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MISSOULA MT 725 PM MDT MON AUG 4 1997 THE NATIONAL WEATHER SERVICE IN MISSOULA HAS EXTENDED THE SEVERE THUNDERSTORM WARNING THROUGH 815 PM MDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN NORTHWEST MONTANA ...EASTERN FLATHEAD COUNTY AT 725 PM MDT RADAR INDICATED THE SEVERE THUNDERSTORM MOVING THROUGH GLACIER NATIONAL PARK WAS OVER THE GOING TO THE SUN ROAD JUST WEST OF LOGAN PASS. THE STORMS IS MOVING NORTH AT 5 MPH. IT WILL PASS 5 MILES WEST OF THE MANY GLACIER AREA AROUND 800 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 DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. WHITMORE/CLEMMONS
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 4, 1:47 PM MDT, 5 hours 38 minutes earlier.
Area forecast discussion, Aug 4, 1:47 PM MDT, 5 hours 38 minutes before
WESTERN MONTANA AND NORTH CENTRAL IDAHO FORECAST DISCUSSION NATIONAL WEATHER SERVICE MISSOULA MT 145 PM MDT MON AUG 4 1997 STILL NOT FOND OF MODELS HANDLING OF UPPER LOW IN UT/SOUTHERN ID BUT AVAILABLE MOISTURE IS UNQUESTIONED. BEST EVIDENCE OF A STRONG VORT LIES IN A LOOP OF RADAR REFLECTIVITY AT PIH WITH A COMMA SIGNATURE BUT IS BECOMING DIFFUSE. LOW MOVING NORTH INTO WEST CENTRAL UT STILL LOOK STRONGER AND DO NOT KNOW WHICH WILL BE THE DOMINANT CENTER. BIGGER PICTURE...UPPER RIDGE OVER US TO BUILD WHILE THE LOW GETS HUNG UP WITHIN. HIGH CENTER IN NEW MEXICO TO RETROGRADE TO OFFSHORE LOCATION BY 48 HOURS WHILE THE LOW NEAR 48N/140W RETROGRADES FOR 24 HOURS THEN SWINGS BACK EAST. WILL ACCEPT THAT MUCH FROM MODELS AND IMPLIES HOT WILL CONTINUE UNTIL THE SHORTWAVE POSSIBLY DROPPING IN FROM NORTHWEST ON FRI IS RESOLVED. FIGURE THE UT LOW WILL REACH EASTERN ID/SOUTHWEST MT AS MODELS SHOW BUT PREFER AVN SOLUTION BEYOND 30 HOURS...WITH PERHAPS A PIECE OF THE LOW BEING DRAWN SOUTHEAST VS. THE WHOLE THING. SO NGM IS DROPPING POPS TOO QUICKLY AND WILL TREND TOWARD THE AVN HERE. WILL NOT RAISE POPS QUITE AS HIGH AS AVN EXCEPT AT BTM BECAUSE LOW LEVEL CONVERGENCE LOOKS WEAK. ALSO HAVING TROUBLE BELIEVING SIGNIFICANT MOISTURE WILL REACH FCA...ESPECIALLY TONIGHT FOR THE AVN 50 PCT POPS THERE...BUT THE INSTABILITY THERE FOR THE NEXT 72 HOURS IS SCARY WITH -6 LIFTED INDEX EACH DAY AND GOOD CAPES TO START. AVN TEMPS LOOKS RAIN COOLED AND OVERDONE...WILL COMPROMISE HERE WITH MOS HERE. GV ...FORECASTS BELOW ARE PRELIMINARY AND SUBJECT TO CHANGE... LIB .. 057/089 053/092 ... 351222 FCA BB 057/087 054/091 054 351342 POL .. 061/087 057/088 ... 352342 MSO WB 062/085 058/087 056 355553 HMM .. 062/083 058/085 ... 356554 BTM .. 052/075 050/079 ... 357654 S80 .. 058/085 060/087 ... 352332 P69 .. 061/087 060/090 ... 353432 SMN .. 058/076 058/079 ... 356654
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 5, 5:10 PM MDT | Severe Thunderstorm Warning | MSO | Flathead | 60 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.