Alert archive / Montana / Severe Thunderstorm Warnings in 1996

Severe Thunderstorm Warning 9, NWS Great Falls, MT

June 15, 1996Cascade County, Montana

NWS Great Falls, MT issued this severe thunderstorm warning at Jun 15, 1996, 5:10 PM MDT for Cascade County, Montana. It was in force for 65 min. 2 reports 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 15, 1996, 5:10 PM MDT (23:10 UTC)
Expired
Jun 15, 1996, 6:15 PM MDT
In force
65 min
Issued by
NWS Great Falls, MT
Area
Whole counties

County Cascade County, MT

The radar

The Great Falls radar (KTFX), 17 km from the middle of the area, began a volume at 23:12 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.

What was reported inside it

TimeReportWhereRemark
Jun 15, 5:20 PM MDTHail 1Simms, MT
Jun 15, 6:07 PM MDTHail 0.75Ulm, MT

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.

The nearest sounding before it

Great_falls, MT (KTFX), launched 12:00Z, 11.2 hours before the alert went out and 59 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 1996-06-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 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 1996-06-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 25 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
1 J/kg
Mixed-layer CIN
-208 J/kg
Mixed-layer LCL
1512 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
25 m²/s²
0-3 km storm-relative helicity
63 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 15, 4:23 PM MDTSevere Thunderstorm WarningTFXLewis and Clark, Teton67 min
Jun 15, 5:03 PM MDTSevere Thunderstorm WarningTFXLiberty57 min
Jun 15, 5:39 PM MDTSevere Thunderstorm WarningTFXMeagher66 min
Jun 15, 5:55 PM MDTSevere Thunderstorm WarningTFXLiberty65 min

Nearby

Severe Thunderstorm Warnings in Montana, 1996Every severe thunderstorm warning in 1996

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; radar from the NEXRAD Level II archive.