Alert archive / Montana / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 2, NWS Great Falls, MT

June 5, 2000Cascade County, Lewis and Clark County, Teton County, Montana

NWS Great Falls, MT issued this severe thunderstorm warning at Jun 5, 2000, 7:14 PM MDT for Cascade County, Lewis and Clark County, Teton County, Montana. It was in force for 31 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued: Jun 5, 2000, 7:14 PM MDT (01:14 UTC)
Expired: Jun 5, 2000, 7:45 PM MDT
In force: 31 min
Issued by: NWS Great Falls, MT
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Cascade County, MT, Lewis and Clark County, MT, Teton County, MT

The radar

The Great Falls radar (KTFX), 65 km from the middle of the area, began a volume at 01:18 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Great_falls, MT (KTFX), launched 00:00Z, 1.2 hours before the alert went out and 124 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1296 J/kg
Mixed-layer CIN: -119 J/kg
Mixed-layer LCL: 2824 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 28 m²/s²
0-3 km storm-relative helicity: 163 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.9

Open this sounding in Storm Lab

The text

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

146 
WUUS55 KTFX 060116
SVRGTF
MTC013-049-099-060145-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREAT FALLS MT
714 PM MDT MON JUN 5 2000

THE NATIONAL WEATHER SERVICE IN GREAT FALLS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WEST CENTRAL CASCADE COUNTY IN CENTRAL MONTANA
  SOUTH CENTRAL TETON COUNTY IN NORTH CENTRAL MONTANA
  CENTRAL LEWIS AND CLARK COUNTY IN WEST CENTRAL MONTANA

* UNTIL 745 PM MDT

* AT 703 PM MDT...A SEVERE THUNDERSTORM WAS REPORTED ALONG A LINE
  EXTENDING FROM 8 MILES WEST OF AUGUSTA TO 33 MILES SOUTH OF
  AUGUSTA...OR ALONG A LINE EXTENDING FROM 29 MILES SOUTHWEST OF
  CHOTEAU TO 26 MILES SOUTHWEST OF CASCADE...MOVING NORTHEAST AT 20
  MPH.

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

LAT...LON 4750 11258 4700 11216 4725 11173 4771 11215

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 5, 7:56 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Teton	49 min
Jun 5, 8:39 PM MDT	Severe Thunderstorm Warning	TFX	Chouteau	36 min
Jun 5, 8:43 PM MDT	Severe Thunderstorm Warning	TFX	Liberty, Pondera, Toole	32 min

Nearby

Severe Thunderstorm Warnings in Montana, 2000 Every severe thunderstorm warning in 2000

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; radar from the NEXRAD Level II archive.