Alert archive / Montana / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 4, NWS Missoula, MT

June 27, 2002Powell County, Montana

NWS Missoula, MT issued this severe thunderstorm warning at Jun 27, 2002, 5:32 PM MDT for Powell County, Montana. It was in force for 43 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
Jun 27, 2002, 5:32 PM MDT (23:32 UTC)
Expired
Jun 27, 2002, 6:15 PM MDT
In force
43 min
Issued by
NWS Missoula, MT
Area
Counties, with a storm outline in the text

County Powell County, MT

What was reported inside it

TimeReportWhereRemark
Jun 27, 5:35 PM MDTHail 0.88Ovando, 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

Great_falls, MT (KTFX), launched 12:00Z, 11.5 hours before the alert went out and 184 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 2002-06-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 176 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 2002-06-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -44 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
176 J/kg
Mixed-layer CIN
-365 J/kg
Mixed-layer LCL
2830 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
-44 m²/s²
0-3 km storm-relative helicity
17 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 
WUUS55 KMSO 272332
SVRMSO
MTC077-280015-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MISSOULA MT
532 PM MDT THU JUN 27 2002

THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL POWELL COUNTY IN WEST CENTRAL MONTANA

* UNTIL 615 PM MDT

* AT 532 PM MDT...RADAR INDICATED A SEVERE THUNDERSTORM OVER
  HELMVILLE...OR 16 MILES NORTH OF DRUMMOND...MOVING NORTHEAST AT 20
  MPH.

* THE SEVERE THUNDERSTORM WILL REMAIN OVER REMOTE AREAS.

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 4689 11318 4672 11288 4722 11259 4733 11292

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 27, 4:26 PM MDTFlash Flood WarningMSORavalli49 min
Jun 27, 5:14 PM MDTFlash Flood WarningMSORavalli61 min
Jun 27, 5:15 PM MDTFlash Flood WarningMSORavalli60 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.