Alert archive / Montana / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 66, NWS Missoula, MT
NWS Missoula, MT issued this severe thunderstorm warning at Sep 6, 1997, 6:48 AM MDT for Missoula County, Montana. It was in force for 27 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 6, 1997, 6:48 AM MDT (12:48 UTC)
- Expired
- Sep 6, 1997, 7:15 AM MDT
- In force
- 27 min
- Issued by
- NWS Missoula, MT
- Area
- Whole counties
County Missoula County, MT
The nearest sounding before it
Spokane, WA (KOTX), launched 12:00Z, 0.8 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1685 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 49 m²/s²
- 0-3 km storm-relative helicity
- 76 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
642 WUUS1 KMSO 061250 RRA SVRMSO MTC063-061315- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MISSOULA MT 648 AM MDT SAT SEP 6 1997 THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 715 AM MDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN WEST CENTRAL MONTANA ...NORTHEASTERN MISSOULA COUNTY A STRONG THUNDERSTORM WAS LOCATED 5 MILES WEST OF SEELEY LAKE AND IS MOVING TO THE NORTHEAST AT 35 MPH. LARGE HAIL IS POSSIBLE WITH THIS STORM. THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH YOU SHOULD PREPARE FOR DAMAGING WIND IN EXCESS OF 55 MPH...LARGE HAIL...AND DEADLY LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER... PREFERABLY INSIDE A STRONG BUILDING BUT STAY AWAY FROM WINDOWS.
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 6, 2:04 AM MDT, 4 hours 44 minutes earlier.
Area forecast discussion, Sep 6, 2:04 AM MDT, 4 hours 44 minutes before
WESTERN MONTANA AND NORTH CENTRAL IDAHO FORECAST DISCUSSION NATIONAL WEATHER SERVICE MISSOULA MT 200 AM MDT SAT SEP 6 1997 RADAR INDICATES ISOLATED CONVECTION MAINLY OVER ZONE 2 NORTHWEST MONTANA..FEW TSTMS WESTERN IDAHO COUNTY AND PANHANDLE. SOUTHEASTERN IDAHO FAIRLY ACTIVE BUT LOOKS LIKELY TO REMAIN SOUTH OF BEAVERHEAD COUNTY AS ENERGY RIDES OVER INTO WESTERN WYOMING. 00Z ETA FAIRLY CLOSE IDENTIFYING VORT CENTERS 6 HOURS OUT..BUT SOME DETAIL LOST PER IR. SATELLITE IR SHOWS JET CRUISING OVER NW WASHINGTON SWINGING MAIN ENERGY NORTH INTO CANADA WHILE INTRODUCING ZONAL FLOW OVER THE NORTHERN ZONES DURING THE DAY..HOWEVER SOUTHWEST MONTANA MAINTAINS SW FETCH. 5H HEIGHTS START TO RISE BY LATE AFTERNOON ACROSS THE FORECAST AREA AS RIDGE REESTABLISHES OVER PACIFIC NW. ETA SHOWS LOW/MID LEVEL MOISTURE DRYING TREND PUSHING EASTWARD OVER THE PANHANDLE AND WEST- CENTRAL AND POINTS NORTH IN MONTANA DURING THE AFTERNOON..BUT SW SLOW TO DRY. SOUTHWEST MONTANA ESPECIALLY ALONG THE SOUTHERN BEAVERHEAD WILL BE THE FEATURED AREA DURING THE AFTERNOON AND CONTINUING OVERNIGHT AS A DISTURBANCE MOVES OVER EASTERN IDAHO. ON SUNDAY..THE MOST UNSTABLE AIR STILL REMAINS OVER THE SW WITH ISOLATED CONVECTION EXPECTED DURING THE AFTERNOON. WILL MENTION PATCHY VALLEY FOG THIS MORNING. STOLL LIB .. 070/042 072/... ... 33211 FCA EB 072/040 074/042 076 33201 POL .. 075/050 076/... ... 33100 MSO BU 074/043 078/045 079 33100 HMM .. 076/041 080/... ... 33101 BTM .. 075/041 078/... ... 33212 S80 .. 075/052 080/... ... 33101 P69 .. 080/050 083/... ... 33101 SMN .. 079/044 082/... ... 33102
The office that day
Everything else NWS Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 5, 6:37 PM MDT | Severe Thunderstorm Warning | MSO | Mineral, Missoula | 68 min |
| Sep 5, 7:13 PM MDT | Severe Thunderstorm Warning | MSO | Flathead | 62 min |
| Sep 5, 8:02 PM MDT | Severe Thunderstorm Warning | MSO | Missoula, Powell | 58 min |
| Sep 5, 8:02 PM MDT | Severe Thunderstorm Warning | MSO | Lincoln | 58 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.