Alert archive / Montana / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 29, NWS Missoula, MT

August 4, 2002Missoula County, Montana

NWS Missoula, MT issued this severe thunderstorm warning at Aug 4, 2002, 6:21 PM MDT for Missoula County, Montana. It was in force for 24 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Aug 4, 2002, 6:21 PM MDT (00:21 UTC)
Expired
Aug 4, 2002, 6:45 PM MDT
In force
24 min
Issued by
NWS Missoula, MT
Area
Counties, with a storm outline in the text

County Missoula County, MT

What was reported inside it

TimeReportWhereRemark
Aug 4, 6:32 PM MDTHail 0.75Lolo, MT

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.

The nearest sounding before it

Spokane, WA (KOTX), launched 00:00Z, 0.4 hours before the alert went out and 205 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 2002-08-05Temperature 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 00:00Z on 2002-08-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 2 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
1794 m above ground
0-6 km bulk shear
56 kt
0-1 km storm-relative helicity
2 m²/s²
0-3 km storm-relative helicity
43 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.

779 
WUUS55 KMSO 050021
SVRMSO
MTC063-050045-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MISSOULA MT
618 PM MDT SUN AUG 4 2002

THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A

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

* UNTIL 645 PM MDT

* AT 618 PM MDT...RADAR INDICATED A SEVERE THUNDERSTORM 13 MILES
  SOUTH OF LOLO...OR 21 MILES SOUTH OF MISSOULA...MOVING NORTH AT 30
  MPH.

* THE SEVERE THUNDERSTORM WILL BE...
  OVER LOLO AT 640 PM MDT

THIS STORM HAS HAD A HISTORY OF PRODUCING LARGE HAIL UP TO 1 INCH IN 
DIAMETER...AND HEAVY RAIN UP TO ONE AND A HALF INCHES PER HOUR. 
ALSO...WIND GUSTS TO 50 MPH CAN BE EXPECTED ALONG WITH FREQUENT 
LIGHTNING. FOR YOUR PROTECTION...GO INDOORS AND STAY AWAY FROM 
WINDOWS. IF YOU ARE CAUGHT OUTSIDE...MOVE TO A WELL PROTECTED AREA.


LAT...LON 4663 11417 4662 11409 4682 11398 4683 11420

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 4, 6:02 PM MDTSevere Thunderstorm WarningMSORavalli28 min
Aug 4, 6:45 PM MDTSevere Thunderstorm WarningMSOMissoula30 min

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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.