Alert archive / Montana / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 14, NWS Great Falls, MT

June 5, 1997Cascade County, Meagher County, Montana

NWS Great Falls, MT issued this severe thunderstorm warning at Jun 5, 1997, 3:49 PM MDT for Cascade County, Meagher County, Montana. It was in force for 56 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, 3:49 PM MDT (21:49 UTC)
Expired
Jun 5, 1997, 4:45 PM MDT
In force
56 min
Issued by
NWS Great Falls, MT
Area
Whole counties

Counties Cascade County, MT, Meagher County, MT

The radar

The Great Falls radar (KTFX), 60 km from the middle of the area, began a volume at 21:52 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, 9.8 hours before the alert went out and 69 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 1997-06-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 65 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 1997-06-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 109 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
65 J/kg
Mixed-layer CIN
-292 J/kg
Mixed-layer LCL
602 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
109 m²/s²
0-3 km storm-relative helicity
439 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.

624 
WUUS1 KGTF 052153 RRA
SVRGTF
MTC013-059-052245-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREAT FALLS MT
349 PM MDT THU JUN 5 1997
 
THE NATIONAL WEATHER SERVICE IN GREAT FALLS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  445 PM MDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN CENTRAL MONTANA
 
   ...EXTREME SOUTHEASTERN CASCADE COUNTY
 
   ...NORTH CENTRAL MEAGHER COUNTY
 
AT 345PM MDT RADAR INDICATED A SEVERE THUNDERSTORM ABOUT 8 MILES SOUTH
OF NEIHART ALONG HIGHWAY 89. THIS STORM WAS MOVING NORTH AT 15 TO 20 MPH
AND LIKELY CONTAINS LARGE HAIL AND VERY HEAVY RAIN.

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, 12:15 AM MDTSevere Thunderstorm WarningTFXJudith Basin45 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; radar from the NEXRAD Level II archive.