Alert archive / Montana / Severe Thunderstorm Warnings in 1996

Severe Thunderstorm Warning 21, NWS Great Falls, MT

June 25, 1996Cascade County, Lewis and Clark County, Meagher County, Montana

NWS Great Falls, MT issued this severe thunderstorm warning at Jun 25, 1996, 6:47 PM MDT for Cascade County, Lewis and Clark County, Meagher County, Montana. It was in force for 43 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Jun 25, 1996, 6:47 PM MDT (00:47 UTC)
Expired: Jun 25, 1996, 7:30 PM MDT
In force: 43 min
Issued by: NWS Great Falls, MT
Area: Whole counties

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

The radar

The Great Falls radar (KTFX), 51 km from the middle of the area, began a volume at 00:46 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.

What was reported inside it

Time	Report	Where	Remark
Jun 25, 7:00 PM MDT	Hail 1	Monarch, 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 00:00Z, 0.8 hours before the alert went out and 87 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: 27 J/kg
Mixed-layer CIN: -212 J/kg
Mixed-layer LCL: 1083 m above ground
0-6 km bulk shear: 70 kt
0-1 km storm-relative helicity: 63 m²/s²
0-3 km storm-relative helicity: 149 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KGTF 260051
SVRGTF
MTC013-049-059-260130-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREAT FALLS MT
647 PM MDT TUE JUN 25 1996
 
THE NATIONAL WEATHER SERVICE IN GREAT FALLS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  730 PM MDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN NORTH MONTANA
 
   ...SOUTHWESTERN CASCADE COUNTY
 
IN SOUTHWEST MONTANA
 
   ...SOUTHEASTERN LEWIS AND CLARK COUNTY
   ...NORTHWESTERN MEAGHER COUNTY
 
AT 645 PM GREAT FALLS RADAR INDICATED A SEVERE THUNDERSTORM OVER EXTREME
SOUTHEAST LEWIS AND CLARK COUNTIE. THIS STORM IS MOVING TOWARDS THE
NORTHEAST AT 30 MPH AND WILL MOVE THROUGH NORTHWEST MEAGHER AND
SOUTHWEST CASCADE COUNTY BEFORE 730 PM.  THIS STORM HAS A HISTORY
OF PRODUCING 1 TO 2 INCH HAIL AND BRIEF HEAVY RAIN.
 
IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A
STRONG BUILDING.  DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...
AND DEADLY> LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS.
STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.
 
 
&

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 25, 6:12 PM MDT	Severe Thunderstorm Warning	TFX	Lewis and Clark	33 min
Jun 25, 7:17 PM MDT	Severe Thunderstorm Warning	TFX	Chouteau	43 min
Jun 25, 7:33 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Meagher	42 min
Jun 25, 8:08 PM MDT	Severe Thunderstorm Warning	TFX	Judith Basin	52 min
Jun 25, 9:05 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	40 min
Jun 26, 4:00 PM MDT	Severe Thunderstorm Warning	TFX	Lewis and Clark, Teton	45 min
Jun 26, 4:33 PM MDT	Tornado Warning	TFX	Cascade, Lewis and Clark	42 min
Jun 26, 4:49 PM MDT	Severe Thunderstorm Warning	TFX	Teton	41 min
Jun 26, 5:53 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	52 min

Nearby

Severe Thunderstorm Warnings in Montana, 1996 Every severe thunderstorm warning in 1996

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; radar from the NEXRAD Level II archive.