Alert archive / Montana / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 93, NWS Glasgow, MT

August 15, 2014Petroleum County, Phillips County, Montana

NWS Glasgow, MT issued this severe thunderstorm warning at Aug 15, 2014, 7:44 PM MDT for Petroleum County, Phillips County, Montana. It was in force for 47 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
Aug 15, 2014, 7:44 PM MDT (01:44 UTC)
Expired
Aug 15, 2014, 8:31 PM MDT
In force
47 min
Issued by
NWS Glasgow, MT
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Petroleum County, MT, Phillips County, MT

The radar

The Glasgow radar (KGGW), 123 km from the middle of the area, began a volume at 01:46 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 00:00Z, 1.7 hours before the alert went out and 191 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 2014-08-16Temperature 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 00:00Z on 2014-08-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -2 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
2025 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
-2 m²/s²
0-3 km storm-relative helicity
26 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 15, 6:31 PM MDTSpecial Weather StatementGGW59 min
Aug 15, 7:17 PM MDTSpecial Weather StatementGGWPetroleum58 min
Aug 15, 8:49 PM MDTSpecial Weather StatementGGWPhillips41 min
Aug 15, 9:26 PM MDTSpecial Weather StatementGGWPhillips64 min
Aug 15, 9:30 PM MDTSpecial Weather StatementGGWGarfield60 min
Aug 15, 9:55 PM MDTSevere Thunderstorm WarningGGWGarfield, McCone, Prairie35 min
Aug 15, 10:10 PM MDTSpecial Weather StatementGGWValley50 min
Aug 15, 10:13 PM MDTFlash Flood WatchGGWDawson, Prairie, Richland, Wibaux5 hr
Aug 15, 10:24 PM MDTSpecial Weather StatementGGWMcCone51 min

Nearby

Severe Thunderstorm Warnings in Montana, 2014Every severe thunderstorm warning in 2014

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.