Alert archive / Montana / Tornado Warnings in 1997

Tornado Warning 1, NWS Missoula, MT

July 19, 1997Beaverhead County, Montana

NWS Missoula, MT issued this tornado warning at Jul 19, 1997, 3:06 PM MDT for Beaverhead County, Montana. It was in force for 69 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
Jul 19, 1997, 3:06 PM MDT (21:06 UTC)
Expired
Jul 19, 1997, 4:15 PM MDT
In force
69 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 21:07 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, 9.1 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.

Skew-T log-pSkew-T log-p diagram, Great_falls, MT at 12:00Z on 1997-07-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 122 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Great_falls, MT at 12:00Z on 1997-07-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 44 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
122 J/kg
Mixed-layer CIN
-92 J/kg
Mixed-layer LCL
1225 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
44 m²/s²
0-3 km storm-relative helicity
51 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KMSO 192110 RRA
TORMSO
MTC001-192215-
 
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MISSOULA MT
306 PM MDT SAT JUL 19 1997
 
THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  415 PM MDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTHWEST MONTANA
 
   ...CENTRAL BEAVERHEAD COUNTY
 
THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING FOR CENTRAL
BEAVERHEAD COUNTY. AT 245 PM THE DILLON SHERIFF'S OFFICE REPORTED A
TORNADO 10 MILES WEST OF DILLON. THIS STORM WAS MOVING TO THE NORTHEAST
AT 15 MPH AND WAS HEADED TOWARD THE TOWN OF MELROSE.
 
ALSO AT ARGENTA SOUTHWEST OF DILLON A TRUCK WAS DAMAGED BY GOLF BALL
SIZE HAIL.
 
 
 
&

The office that day

Everything else NWS Missoula, MT issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 19, 8:30 AM MDTSevere Thunderstorm WarningMSOBeaverhead, Silver Bow60 min
Jul 19, 9:34 AM MDTSevere Thunderstorm WarningMSODeer Lodge56 min
Jul 19, 12:00 PM MDTSevere Thunderstorm WarningMSOPowell45 min
Jul 19, 2:19 PM MDTFlash Flood WarningMSOBeaverhead56 min
Jul 19, 2:19 PM MDTSevere Thunderstorm WarningMSOBeaverhead56 min
Jul 19, 4:00 PM MDTSevere Thunderstorm WarningMSOSilver Bow60 min
Jul 19, 5:25 PM MDTSevere Thunderstorm WarningMSOPowell50 min

Nearby

Tornado Warnings in Montana, 1997Every tornado warning in 1997Tornadoes 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.