Severe Thunderstorm Warning 17, NWS Missoula, MT

Issued

Jul 19, 1997, 8:30 AM MDT (14:30 UTC)

Expired

Jul 19, 1997, 9:30 AM MDT

In force

60 min

Issued by

NWS Missoula, MT

Area

Whole counties

Counties Beaverhead County, MT, Silver Bow County, MT

The Missoula radar (KMSX), 193 km from the middle of the area, began a volume at 14:31 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.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

000 
TTAA00 KMSO 191432 RRA
SVRMSO
MTC001-093-191530-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MISSOULA MT
830 AM MDT SAT JUL 19 1997
 
THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  930 AM MDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN SOUTHWEST MONTANA
 
   ...NORTHERN BEAVERHEAD COUNTY...WESTERN SILVER BOW COUNTY
 
AT 830 AM MDT MISSOULA RADAR INDICATES A SEVERE THUNDERSTORM 10 MILES NO
HTOWN OF POLARIS IN NORTHERN BEAVERHEAD COUNTY. THE STORM IS MOVING TO
THE NORTH AT 20 MPH. THIS WILL PUT THE STORM JUST EAST OF THE TOWN OF
WISE RIVER AT 845 AM MDT. THE STORM WILL THEN MOVE INTO WESTERN SILVER
BOW COUNTY.
 
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

NWS Missoula, MT wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 19, 2:00 AM MDT, 6 hours 30 minutes earlier.

WESTERN MONTANA AND NORTH CENTRAL IDAHO FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MISSOULA MT
200 AM MDT SAT JUL 19 1997

BEEN LOOKING FOR FAULT IN OUR ONE AVAILABLE 00Z MODEL AND HAVE FOUND
LITTLE EXCEPT THE QPF IS OVERDONE AS USUAL. BUT THE NGM APPEARS TO
BE FOLLOWING THE LEAD OF THE 12Z AVN IN PRODUCING HIGH POPS. SO WILL
ACCEPT MOST OF MOS NUMBERS RATHER THAN STICK WITH THE ZONES AS THEY
WERE. UPPER LOW OVER ID TO BARELY MOVE NEXT 48 HOURS AS IT GETS STUCK
IN UPPER RIDGE. ALMOST ALL OF THE MOISTURE WRAPPED UP INTO THIS LOW
IS MODIFIED TROPICAL AND WE NEED LITTLE ADDITIONAL ENTRAINMENT FOR
SUFFICIENT INSTABILITY FOR STRONG THUNDERSTORMS. BELIEVE BEST CHANCE
OF STRONG ONES ARE STILL IN SOUTHWEST MT WHERE 12Z ETA SHOWED HIGH
CAPES. NORTHWEST MT IN A DEFORMATION ZONE CURRENTLY AND SATELLITE
SHOWING NO TENDENCY FOR THE LOW TO MOVE. FCA MAY BE IN FOR A SUNNY
DAY UNTIL AFTERNOON SO WILL KEEP HIGHEST TEMPS THERE. THE DEFORMATION
AREA WILL MOVE NORTH OF BORDER THIS EVE PROVIDED THE LOW DOES DRIFT
ANYTHING CLOSE TO NGM. GV

...FORECASTS BELOW ARE PRELIMINARY AND SUBJECT TO CHANGE...

LIB .. 082/057 084/... ... 35332
FCA BE 081/056 080/054 082 35443
POL .. 081/057 085/... ... 35553
MSO WE 078/056 082/055 085 35874
HMM .. 077/055 085/... ... 35864
BTM .. 070/050 073/... ... 35975
S80 .. 075/055 084/... ... 35432
P69 .. 078/058 081/... ... 35542
SMN .. 073/053 082/... ... 35542

Severe Thunderstorm Warnings in Montana, 1997Every severe thunderstorm warning in 1997

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.