Alert archive / Montana / Severe Thunderstorm Warnings in 1995

Severe Thunderstorm Warning 83, NWS Great Falls, MT

July 19, 1995Judith Basin County, Montana

NWS Great Falls, MT issued this severe thunderstorm warning at Jul 19, 1995, 5:49 PM MDT for Judith Basin County, Montana. It was in force for 56 min.

The area

The counties it named.

The facts

Issued
Jul 19, 1995, 5:49 PM MDT (23:49 UTC)
Expired
Jul 19, 1995, 6:45 PM MDT
In force
56 min
Issued by
NWS Great Falls, MT
Area
Whole counties

County Judith Basin County, MT

The radar

The Great Falls radar (KTFX), 96 km from the middle of the area, began a volume at 23:51 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 12:00Z, 11.8 hours before the alert went out and 52 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 1995-07-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 24 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 1995-07-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -19 square meters per square second.193958Sfc1 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
24 J/kg
Mixed-layer CIN
-129 J/kg
Mixed-layer LCL
801 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
-19 m²/s²
0-3 km storm-relative helicity
13 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 
WUUS1 KGTF 192350
SVRGTF
MTC045-200045-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREAT FALLS MT
549 PM MDT WED JUL 19 1995
 
THE NATIONAL WEATHER SERVICE IN GREAT FALLS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  645 PM MDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN NORTH CENTRAL MONTANA
 
   ...JUDITH BASIN COUNTY
 
AT 548 PM MDT DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 5 MILES
NORTHWEST OF STANFORD IN CENTRAL JUDITH BASIN COUNTY. THE STORM WAS
MOVING SOUTHEAST AT 20 MPH AND WILL AFFECT THE COMMUNITIES OF
STANFORD...WINDHAM AND UTTICA DURING THE NEXT HOUR.
 
 
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.

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 19, 3:05 PM MDT, 2 hours 44 minutes before
MTZ003-005-006-192300-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREAT FALLS MT
305 PM MDT WED JUL 19 1995

...THUNDERSTORMS DEVELOPING OVER CENTRAL MONTATNA...

AT 300 PM MDT DOPPLER RADAR INDICATED SCATTERED THUNDERSTORMS DEVELOPING
OVER PORTIONS OF CENTRAL AND NORTH CENTRAL MONTANA.

THE STRONGEST STORMS WERE LOCATED IN SOUTHERN LEWIS AND CLARK
COUNTY 15 MILES NORTH OF HELENA...ALONG THE MADISION/JEFFERSON
COUNTY LINE 35 MILES NORTHWEST OF BOZEMAN AND 40 MILES NORTH OF
LIVINGSTON ALONG THE MEAGHER/WHEATLAND COUNTY LINE. THE THUNDERSTORMS
WILL PRODUCE LIGHTNING...POSSIBLE SMALL HAIL AND GUSTY WINDS...AS WELL
AS PERIODS OF BRIEF HEAVY RAIN.

THESE STORMS WERE MOVING SOUTHEAST AT 15 TO 20 MPH. PERSONS IN PATH OF
THESE STORMS SHOULD BE ALERT FOR RAPDILY CHANGING WEATHER CONDITIONS AND
TAKE SHELTER IF THREATENING WEATHER APPROACHES.

OTHER THUNDERSTORMS WERE LOCATED 15 MILES WEST AND 25 MILES SOUTH OF
HAVRE..NEAR CHOTEAU IN TETON COUNTY SOUTH INTO LEWIS AND CLARK
COUNTY SOUTHWEST OF GREAT FALLS AND IN WESTERN MEAGHER COUNTY. THESE
STORMS WERE ALSO MOVING SOUTHEAST AT ABOUT 15 MPH.

HW

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; radar from the NEXRAD Level II archive.