Alert archive / Montana / Severe Thunderstorm Warnings in 1995

Severe Thunderstorm Warning 41, NWS Great Falls, MT

July 8, 1995Blaine County, Montana

NWS Great Falls, MT issued this severe thunderstorm warning at Jul 8, 1995, 8:40 PM MDT for Blaine County, Montana. It was in force for 80 min.

The area

The counties it named.

The facts

Issued
Jul 8, 1995, 8:40 PM MDT (02:40 UTC)
Expired
Jul 8, 1995, 10:00 PM MDT
In force
80 min
Issued by
NWS Great Falls, MT
Area
Whole counties

County Blaine County, MT

The nearest sounding before it

Great_falls, MT (KTFX), launched 00:00Z, 2.7 hours before the alert went out and 163 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 1995-07-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 40 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 1995-07-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 4 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
40 J/kg
Mixed-layer CIN
-51 J/kg
Mixed-layer LCL
3547 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
4 m²/s²
0-3 km storm-relative helicity
45 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KGTF 090248 RRA
SVRGTF
MTC015-071-005-090243-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREAT FALLS MT
840 PM MDT SAT JUL 8 1995

THE NATIONAL WEATHER SERVICE IN GREAT FALLS HAS EXTENDED THE
SEVERE THUNDERSTORM WARNING FOR SOUTHERN BLAINE COUNTY TO INCLUDE
SOUTHWEST PHILLIPS COUNTY UNTIL 1000 PM MDT.
FOR PEOPLE IN THE FOLLOWING LOCATIONS...

IN NORTH CENTRAL MONTANA

   ...SOUTHERN BLAINE COUNTY...SOUTHWEST PHILIPS COUNTY...

AT 840 PM MDT DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CONTINUING
OVER SOUTHERN BLAINE COUNTY. AT 830 PM LARGE HAIL OF 1.2 INCHES WAS
OBSERVED AT THE COMMUNITY OF WARRICK OVER EXTREME NORTHEAST CHOTEAU
COUNTY. THIS STORM IS MOVING EAST SOUTHEAST AT 30 MPH AND WILL BE OVER
EXTREME SOUTHWEST PHILLIPS COUNTY IN LESS THAN 1 HOUR.
<
THE SEVERE STORM WARNING FOR NORTHERN CHOTEAU COUNTY IS NO LONGER
IN EFFECT.

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOUR HOME OR BUSINESS.  HEAVY RAINS FLOOD ROADS QUICKLY SO
DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.
GTF/RH

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Jul 8, 5:43 PM MDT, 2 hours 57 minutes before
MTZ045-059-090200-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREAT FALLS MT
543 PM MDT SAT JUL 8 1995

AT 540 PM MDT THE GREAT FALLS DOPPLER RADAR WAS INDICATING A STRONG
THUNDERSTORM OVER EAST CENTRAL MEAGHER COUNTY ABOUT 10 TO 15 MILES
NORTH OF WHITE SULFUR SPRINGS...APPROACHING SOUTHWEST JUDITH BASIN
COUNTY. THIS STORM WAS MOVING GENERALLY EASTWARD ABOUT 30 MPH AND
LIKELY INCLUDES HAIL AND STRONG WINDS. THE RADAR WAS INDICATING AROUND
0.70 INCH OR RAIN PER HOUR AT THIS TIME AND WILL BE CROSSING SOUTHERN
JUDITH BASIN COUNTY DURING THE NEXT HOUR OR TWO.

ANOTHER STORM WITH HAIL LIKELY...WAS OVER SOUTHERN LIBERTY COUNTY
MOVING EASTWARD ABOUT 25 MPH. THIS STORM WILL CROSS INTO SOUTHERN
HILL COUNTY DURING THE NEXT HOUR.

RESIDENTS IN THESE COUNTIES SHOULD BE ON THE ALERT FOR EVENING
THUNDERSTORMS AS SOME HAIL AND STRONG WINDS ARE POSSIBLE.
GTF/RH
Special weather statement, Jul 8, 5:51 PM MDT, 2 hours 49 minutes before
MTZ045-059-090200-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREAT FALLS MT
543 PM MDT SAT JUL 8 1995

AT 540 PM MDT THE GREAT FALLS DOPPLER RADAR WAS INDICATING A STRONG
THUNDERSTORM OVER EAST CENTRAL MEAGHER COUNTY ABOUT 10 TO 15 MILES
NORTH OF WHITE SULFUR SPRINGS...APPROACHING SOUTHWEST JUDITH BASIN
COUNTY. THIS STORM WAS MOVING GENERALLY EASTWARD ABOUT 30 MPH AND
LIKELY INCLUDES HAIL AND STRONG WINDS. THE RADAR WAS INDICATING AROUND
0.70 INCH OR RAIN PER HOUR AT THIS TIME AND WILL BE CROSSING SOUTHERN
JUDITH BASIN COUNTY DURING THE NEXT HOUR OR TWO.

ANOTHER STORM WITH HAIL LIKELY...WAS OVER SOUTHERN LIBERTY COUNTY
MOVING EASTWARD ABOUT 25 MPH. THIS STORM WILL CROSS INTO SOUTH0ERN
HILL COUNTY DURING THE NEXT HOUR.

RESIDENTS IN THESE COUNTIES SHOULD BE ON THE ALERT FOR EVENING
THUNDERSTORMS AS SOME HAIL AND STRONG WINDS ARE POSSIBLE.
GTF/RH
Special weather statement, Jul 8, 6:55 PM MDT, 1 hour 45 minutes before
MTZ007-043-049059-090300-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREAT FALLS MT
655 PM MDT SAT JUL 8 1995

AT 650 PM MDT THE GREAT FALLS DOPPLER RADAR WAS INDICATING STRONG
THUNDERSTORMS OVER SOUTHERN LEWIS AND CLARK...NORTHERN JEFFERSON...
BROADWATER AND WESTERN MEAGHER COUNTIES. THESE STORM WERE MOVING
NORTHEASTWARD 25 TO 30 MPH AND SOME LIKELY CONTAINED HAIL AND STRONG
WINDS.

RADAR INDICATED RAINFALL RATES OF 1/2 TO 1 INCH PER HOUR WITH SOME OF
THESE STORMS...ESPECIALLY THE ONE MOVING INTO SOUTHWEST LEWIS AND
CLARK COUNTY.

RESIDENTS IN THESE COUNTIES SHOULD BE ON THE ALERT FOR POSSIBLE
STRONG THUNDERSTORMS CONTAINING HAIL...HEAVY RAIN...STRONG WINDS
AND LIGHTNING.
GTF/RH
Special weather statement, Jul 8, 7:01 PM MDT, 1 hour 39 minutes before
MTZ007-043-049059-090300-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREAT FALLS MT
655 PM MDT SAT JUL 8 1995

AT 650 PM MDT THE GREAT FALLS DOPPLER RADAR WAS INDICATING STRONG
THUNDERSTORMS OVER SOUTHERN LEWIS AND CLARK...NORTHERN JEFFERSON...
BROADWATER AND WESTERN MEAGHER COUNTIES. THESE STORM WERE MOVING
NORTHEASTWARD 25 TO 30 MPH AND SOME LIKELY CONTAINED HAIL AND STRONG
WINDS.

RADAR INDICATED RAINFALL RATES OF 1/2 TO 1 INCH PER HOUR WITH SOME OF
THESE STORMS...ESPECIALLY THE ONE MOVING INTO SOUTHWEST LEWIS AND
CLARK COUNTY.

RESIDENTS IN THESE COUNTIES SHOULD BE ON THE ALERT FOR POSSIBLE
STRONG THUNDERSTORMS CONTAINING HAIL...HEAVY RAIN...STRONG WINDS
AND LIGHTNING.
GTF/RH

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 8, 6:44 PM MDTSevere Thunderstorm WarningTFXChouteau, Hill61 min
Jul 8, 7:43 PM MDTSevere Thunderstorm WarningTFXBlaine, Chouteau, Hill62 min
Jul 8, 8:03 PM MDTSevere Thunderstorm WarningTFXCascade, Lewis and Clark, Meagher57 min
Jul 9, 3:30 PM MDTSevere Thunderstorm WarningTFXBroadwater30 min
Jul 9, 5:14 PM MDTSevere Thunderstorm WarningTFXFergus61 min

Nearby

Severe Thunderstorm Warnings in Montana, 1995Every severe thunderstorm warning in 1995

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.