Alert archive / Montana / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 13, NWS Great Falls, MT

June 5, 1997Judith Basin County, Montana

NWS Great Falls, MT issued this severe thunderstorm warning at Jun 5, 1997, 12:15 AM MDT for Judith Basin County, Montana. It was in force for 45 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jun 5, 1997, 12:15 AM MDT (06:15 UTC)
Expired
Jun 5, 1997, 1:00 AM MDT
In force
45 min
Issued by
NWS Great Falls, MT
Area
Whole counties

County Judith Basin County, MT

The nearest sounding before it

Great_falls, MT (KTFX), launched 00:00Z, 6.3 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 00:00Z on 1997-06-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 799 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 1997-06-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 76 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
799 J/kg
Mixed-layer CIN
-108 J/kg
Mixed-layer LCL
2114 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
76 m²/s²
0-3 km storm-relative helicity
208 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.2

Open this sounding in Storm Lab

The text

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

872 
WUUS1 KGTF 050618 RRA
SVRGTF
MTC045-050700-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREAT FALLS MT
1215 AM MDT THU JUN 5 1997
 
THE NATIONAL WEATHER SERVICE IN GREAT FALLS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  100 AM MDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN CENTRAL MONTANA
 
   ...CENTRAL JUDITH BASIN COUNTY
 
AT 1215 AM MDT DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM IN CENTRAL
JUDITH BASIN COUNTY...FIVE MILES WEST OF THE TOWN OF STANFORD. THE STORM
IS MOVING NORTHWEST AT 15 MPH. THE STORM WILL AFFECT THE TOWN OF GEYSER
DURING THE NEXT HOUR AND WILL LIKELY PRODUCE UP TO ONE INCH SIZED
HAIL.
 
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
DONT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.
 
HW

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 4, 6:07 PM MDTSevere Thunderstorm WarningTFXLewis and Clark68 min
Jun 4, 6:11 PM MDTSevere Thunderstorm WarningTFXPondera, Teton64 min
Jun 4, 7:14 PM MDTSevere Thunderstorm WarningTFXPondera, Teton, Toole61 min
Jun 4, 7:53 PM MDTSevere Thunderstorm WarningTFXChouteau37 min
Jun 4, 8:01 PM MDTSevere Thunderstorm WarningTFXToole44 min
Jun 4, 8:36 PM MDTSevere Thunderstorm WarningTFXCascade54 min
Jun 5, 3:49 PM MDTSevere Thunderstorm WarningTFXCascade, Meagher56 min

Nearby

Severe Thunderstorm Warnings in Montana, 1997Every severe thunderstorm warning in 1997

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.