Alert archive / Montana / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 49, NWS Great Falls, MT

July 14, 20024 counties in Montana

NWS Great Falls, MT issued this severe thunderstorm warning at Jul 14, 2002, 6:03 PM MDT for 4 counties in Montana. It was in force for 57 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
Jul 14, 2002, 6:03 PM MDT (00:03 UTC)
Expired
Jul 14, 2002, 7:00 PM MDT
In force
57 min
Issued by
NWS Great Falls, MT
Area
Counties, with a storm outline in the text

Counties Broadwater County, MT, Cascade County, MT, Lewis and Clark County, MT, Meagher County, MT

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jul 14, 3:15 PM MDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Great_falls, MT (KTFX), launched 00:00Z, 0.1 hours before the alert went out and 114 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 00:00Z on 2002-07-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1325 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 00:00Z on 2002-07-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 22 square meters per square second.19395878Sfc1 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
1325 J/kg
Mixed-layer CIN
-20 J/kg
Mixed-layer LCL
3139 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
22 m²/s²
0-3 km storm-relative helicity
167 m²/s²
Significant tornado parameter
0.0
Supercell composite
5.9

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

996 
WUUS55 KTFX 150003
SVRTFX
MTC007-013-049-059-150100-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREAT FALLS MT
602 PM MDT SUN JUL 14 2002

THE NATIONAL WEATHER SERVICE IN GREAT FALLS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN CASCADE COUNTY IN CENTRAL MONTANA
  NORTHWESTERN MEAGHER COUNTY IN CENTRAL MONTANA
  NORTHERN BROADWATER COUNTY IN SOUTHWEST MONTANA
  SOUTHEASTERN LEWIS AND CLARK COUNTY IN WEST CENTRAL MONTANA

* UNTIL 700 PM MDT

* AT 600 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS FROM 5 MILES SOUTHWEST OF WOLF CREEK
  TO 41 MILES SOUTHEAST OF WOLF CREEK...OR FROM 24 MILES NORTH OF
  HELENA TO 14 MILES NORTH OF TOWNSEND...MOVING EAST AT 20 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  4 MILES SOUTH OF WOLF CREEK AT 605 PM MDT

THESE STORMS HAVE A HISTORY OF PRODUCING LARGE HAIL AND DAMAGING 
WIND.

REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY
WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST
OFFICE IN GREAT FALLS.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM MDT SUNDAY
EVENING FOR WESTERN MONTANA.

LAT...LON 4701 11227 4666 11199 4653 11176 4625 11171
          4641 11132 4681 11136 4703 11134 4722 11173
          4723 11205

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 14, 6:13 PM MDTSevere Thunderstorm WarningTFXCascade47 min
Jul 14, 6:48 PM MDTSevere Thunderstorm WarningTFXChouteau57 min
Jul 14, 6:52 PM MDTSevere Thunderstorm WarningTFXCascade, Meagher38 min
Jul 14, 7:12 PM MDTSevere Thunderstorm WarningTFXJudith Basin48 min
Jul 14, 7:36 PM MDTSevere Thunderstorm WarningTFXChouteau, Teton54 min
Jul 14, 7:48 PM MDTSevere Thunderstorm WarningTFXBeaverhead57 min
Jul 14, 7:55 PM MDTSevere Thunderstorm WarningTFXChouteau35 min
Jul 14, 7:59 PM MDTSevere Thunderstorm WarningTFXFergus, Judith Basin61 min
Jul 14, 8:33 PM MDTSevere Thunderstorm WarningTFXChouteau, Hill57 min
Jul 14, 8:43 PM MDTSevere Thunderstorm WarningTFXBeaverhead62 min
Jul 14, 8:58 PM MDTSevere Thunderstorm WarningTFXBlaine, Fergus62 min
Jul 14, 9:56 PM MDTSevere Thunderstorm WarningTFXBlaine49 min
Jul 14, 10:25 PM MDTSevere Thunderstorm WarningTFXLewis and Clark50 min
Jul 14, 10:47 PM MDTSevere Thunderstorm WarningTFXBlaine43 min
Jul 15, 3:08 PM MDTSevere Thunderstorm WarningTFXBroadwater37 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; the sounding from the Mesonet's radiosonde archive.