Alert archive / Montana / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 29, NWS Missoula, MT
NWS Missoula, MT issued this severe thunderstorm warning at Aug 2, 1997, 3:01 PM MDT for Beaverhead County, Montana. It was in force for 29 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 2, 1997, 3:01 PM MDT (21:01 UTC)
- Expired
- Aug 2, 1997, 3:30 PM MDT
- In force
- 29 min
- Issued by
- NWS Missoula, MT
- Area
- Whole counties
County Beaverhead County, MT
The radar
The Pocatello radar (KSFX), 226 km from the middle of the area, began a volume at 21:02 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.
The nearest sounding before it
Great_falls, MT (KTFX), launched 12:00Z, 9.0 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
- 11 J/kg
- Mixed-layer CIN
- -393 J/kg
- Mixed-layer LCL
- 1560 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 36 m²/s²
- 0-3 km storm-relative helicity
- 42 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 022101 RRA SVRMSO MTC001-022130- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MISSOULA MT 301 PM MDT SAT AUG 2 1997 THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 330 PM MDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTHWEST MONTANA ...SOUTHERN BEAVERHEAD COUNTY AT 3 PM MDT RADAR INDICATED A SEVERE THUNDERSTORM NEAR DELL ALONG INTERSTATE 15...10 MILES NORTHWEST OF LIMA. THIS STORM IS MOVING TO THE EASTNORTHEAST AT 10 MILES AN HOUR. THIS STORM IS CAPABLE OF PRODUCING HAIL IN EXCESS OF THREE-QUARTERS OF AN INCH ALONG WITH HEAVY RAIN AND STRONG WINDS WHICH COULD EXCEED 60 MILES AN HOUR. 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. BAILEY
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 2, 2:05 PM MDT, 56 minutes earlier.
Area forecast discussion, Aug 2, 2:05 PM MDT, 56 minutes before
WESTERN MONTANA AND NORTH CENTRAL IDAHO FORECAST DISCUSSION NATIONAL WEATHER SERVICE MISSOULA MT 145 PM MDT SAT AUG 2 1997 H5 REMAINS OVER THE REGION THROUGH FORECAST PERIOD. AIR MASS FAIRLY DRY EXCEPT A LITTLE MORE MOISTURE AVAILABLE OVER NORTHWEST MONTANA. WITH THE LIMITED MOISTURE...ALL POPS ZERO TONIGHT. ATMOSPHERE MARGINALLY UNSTABLE SUNDAY WITH THE LOW LEVEL CONVERGENCE OVER THE IDAHO ZONES PER L6M...BUT TSTMS SHOULD BE HIGH BASED WITH LIMITED MOISTURE FOR LOW POPS. SUBSIDENCE OVER THE ENTIRE AREA MONDAY TO KEEP TEMPERATURES IN THE 90S...WHERE THEY SHOULD BE THIS TIME OF THE YEAR. LOOKS LIKE TSTMS RETURN TO THE AREA LATE TUESDAY AS THERMAL TROF RE- ESTABLISHES ITSELF OVER IDAHO AND WESTERN MONTANA. HARMER ...FORECASTS BELOW ARE PRELIMINARY AND SUBJECT TO CHANGE... LIB .. 052/089 052/088 ... 32-2-1 FCA BB 050/088 052/088 052 3202-1 POL .. 054/090 056/090 ... 3202-1 MSO UU 053/092 055/092 054 3202-1 HMM .. 051/094 053/094 ... 3202-1 BTM .. 049/088 051/088 ... 3201-1 S80 .. 056/090 058/090 ... 320101 P69 .. 059/092 060/092 ... 320101 SMN .. 050/086 052/086 ... 320201
The office that day
Everything else NWS Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 1, 7:20 PM MDT | Severe Thunderstorm Warning | MSO | Flathead | 40 min |
| Aug 2, 3:28 PM MDT | Severe Thunderstorm Warning | MSO | Beaverhead | 47 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; radar from the NEXRAD Level II archive.