Alert archive / Montana / Tornado Warnings in 1990

Tornado Warning 1, NWS Missoula, MT

July 5, 1990Flathead County, Montana

NWS Missoula, MT issued this tornado warning at Jul 5, 1990, 7:43 PM MDT for Flathead County, Montana. It was in force for 62 min.

The area

The counties it named.

The facts

Issued
Jul 5, 1990, 7:43 PM MDT (01:43 UTC)
Expired
Jul 5, 1990, 8:45 PM MDT
In force
62 min
Issued by
NWS Missoula, MT
Area
Whole counties

County Flathead County, MT

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Spokane, WA (KOTX), launched 00:00Z, 1.7 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.

Skew-T log-pSkew-T log-p diagram, Spokane, WA at 00:00Z on 1990-07-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Spokane, WA at 00:00Z on 1990-07-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 40 square meters per square second.1939587897Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
3566 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
40 m²/s²
0-3 km storm-relative helicity
68 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 KFCA 060143
TORFCA
MTC029-060245-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE KALISPELL MONTANA
743 PM MDT THU JUL 5 1990
 
THE NATIONAL WEATHER SERVICE IN KALISPELL MONTAHAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  845 PM MDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN NORTHWEST MONTANA
 
   ...CENTRAL TO NORTHEAST FLATHEAD COUNTY
 
AN OFF DUTY WEATHER OBSERVER REPORTED 1/2 TO ONE INCH HAIL AT HIS HOME
ON HIGHWAY 93 BETWEEN KALISPELL AND WHITEFISH. ALSO...HEAVY
RAINSHOWERS ARE OCCURRING IN THE FLATHEAD VALLEY. THE THUNDERSTORMS
ARE MOVING SLOWLY FROM THE SOUTHWEST TO NORTHEAST.
 
 
THE THUNDERSTORMS ARE PRODUCING DANGEROUS LIGHTNING...LARGE HAIL AND
HEAVY RAINSHOWERS. TAKE SHELTER IMMEDIATLY IF YOU ARE OUT OF DOORS.
 
NNNN
 
 
IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A NEARBY REINFORCED
BUILDING.  AS A LAST RESORT...SEEK SHELTER IN A CULVERT...DITCH
OR LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.
 
NNNN

Nearby

Tornado Warnings in Montana, 1990Every tornado warning in 1990Tornadoes in 1990

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.