Alert archive / Montana / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 21, NWS Missoula, MT

August 5, 2003Missoula County, Montana

NWS Missoula, MT issued this severe thunderstorm warning at Aug 5, 2003, 5:48 PM MDT for Missoula 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 5, 2003, 5:48 PM MDT (23:48 UTC)
Expired
Aug 5, 2003, 6:30 PM MDT
In force
42 min
Issued by
NWS Missoula, MT
Area
Counties, with a storm outline in the text

County Missoula County, MT

The nearest sounding before it

Spokane, WA (KOTX), launched 12:00Z, 11.8 hours before the alert went out and 225 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 2003-08-05Temperature 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 12:00Z on 2003-08-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 39 square meters per square second.193958Sfc1 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
3406 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
39 m²/s²
0-3 km storm-relative helicity
56 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.

910 
WUUS55 KMSO 052348
SVRMSO
MTC063-060030-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MISSOULA MT
547 PM MDT TUE AUG 5 2003

THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN MISSOULA COUNTY IN WEST CENTRAL MONTANA

* UNTIL 630 PM MDT

* AT 547 PM MDT...RADAR INDICATED A SEVERE THUNDERSTORM 9 MILES SOUTH
  OF CLINTON...OR 23 MILES SOUTHEAST OF MISSOULA...MOVING NORTH AT 20
  MPH.

* THE SEVERE THUNDERSTORM WILL BE...
  2 MILES EAST OF CLINTON AT 600 PM MDT
  8 MILES EAST OF TURAH AT 610 PM MDT
  4 MILES WEST OF POTOMAC AT 615 PM MDT
  OVER TWIN CREEKS AT 625 PM MDT

DAMAGING WINDS IN EXCESS OF 55 MPH ARE LIKELY WITH THIS SEVERE
THUNDERSTORM. LARGE HAIL IS POSSIBLE...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 4711 11336 4672 11347 4671 11366 4667 11378
          4701 11389 4713 11399

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 5, 5:38 PM MDTSevere Thunderstorm WarningMSOPowell22 min
Aug 5, 5:59 PM MDTSevere Thunderstorm WarningMSOLake, Missoula61 min

Nearby

Severe Thunderstorm Warnings in Montana, 2003Every severe thunderstorm warning in 2003

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.