Alert archive / Montana / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 7, NWS Great Falls, MT

June 6, 1994Pondera County, Toole County, Montana

NWS Great Falls, MT issued this severe thunderstorm warning at Jun 6, 1994, 5:47 PM MDT for Pondera County, Toole County, Montana. It was in force for 58 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 6, 1994, 5:47 PM MDT (23:47 UTC)
Expired
Jun 6, 1994, 6:45 PM MDT
In force
58 min
Issued by
NWS Great Falls, MT
Area
Whole counties

Counties Pondera County, MT, Toole County, MT

What was reported inside it

TimeReportWhereRemark
Jun 6, 6:30 PM MDTTornado F0Shelby, MTSeveral severe thunderstorms moved northeast across Pondera, Glacier and Toole Counties. Two major electric transmission lines were knocked down by either a tornado or strong downburst winds. One line was south of Cut Bank and another east of town. Power wa

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. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Great Falls, MT (KGTF), launched 12:00Z, 11.8 hours before the alert went out and 118 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 1994-06-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 1994-06-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 46 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2239 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
46 m²/s²
0-3 km storm-relative helicity
125 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 6, 4:46 PM MDTSevere Thunderstorm WarningTFXTeton59 min
Jun 6, 5:19 PM MDTSevere Thunderstorm WarningTFXTeton26 min

Nearby

Severe Thunderstorm Warnings in Montana, 1994Every severe thunderstorm warning in 1994

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.