Alert archive / Montana / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 34, NWS Missoula, MT

August 27, 2002Ravalli County, Montana

NWS Missoula, MT issued this severe thunderstorm warning at Aug 27, 2002, 4:33 PM MDT for Ravalli County, Montana. It was in force for 42 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Aug 27, 2002, 4:33 PM MDT (22:33 UTC)
Expired
Aug 27, 2002, 5:15 PM MDT
In force
42 min
Issued by
NWS Missoula, MT
Area
Counties, with a storm outline in the text

County Ravalli County, MT

The nearest sounding before it

Spokane, WA (KOTX), launched 12:00Z, 10.6 hours before the alert went out and 280 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 12:00Z on 2002-08-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 58 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, Spokane, WA at 12:00Z on 2002-08-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 26 square meters per square second.1939Sfc1 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
58 J/kg
Mixed-layer CIN
-87 J/kg
Mixed-layer LCL
1016 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
26 m²/s²
0-3 km storm-relative helicity
31 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.

041 
WUUS55 KMSO 272233
SVRMSO
MTC081-272315-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MISSOULA MT
430 PM MDT TUE AUG 27 2002

THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN RAVALLI COUNTY IN WEST CENTRAL MONTANA

* UNTIL 515 PM MDT

* AT 430 PM MDT...RADAR INDICATED A SEVERE THUNDERSTORM 6 MILES
  NORTHEAST OF SULA...OR 29 MILES SOUTHEAST OF HAMILTON...MOVING
  SOUTH AT 10 MPH.

* THE SEVERE THUNDERSTORM WILL BE...
  4 MILES EAST OF SULA AT 450 PM MDT

SEVERE THUNDERSTORMS PRODUCE HAIL...ALONG WITH FREQUENT LIGHTNING 
AND HEAVY RAIN. FOR YOUR PROTECTION...GO INDOORS AND STAY AWAY FROM 
WINDOWS. IF YOU ARE CAUGHT OUTSIDE...MOVE TO A WELL PROTECTED AREA.


LAT...LON 4576 11408 4575 11383 4589 11376 4602 11388

Nearby

Severe Thunderstorm Warnings in Montana, 2002Every severe thunderstorm warning in 2002

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.