Alert archive / Montana / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 92, NWS Glasgow, MT

August 15, 2014Phillips County, Montana

NWS Glasgow, MT issued this severe thunderstorm warning at Aug 15, 2014, 2:49 PM MDT for Phillips County, Montana. It was in force for 38 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, 2:49 PM MDT (20:49 UTC)
Expired
Aug 15, 2014, 3:27 PM MDT
In force
38 min
Issued by
NWS Glasgow, MT
Area
Storm-based polygon
Hail
1.0 in
Wind
50.0 mph

County Phillips County, MT

The radar

The Glasgow radar (KGGW), 96 km from the middle of the area, began a volume at 20:50 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, 8.8 hours before the alert went out and 219 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 2014-08-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 235 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 2014-08-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 42 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
235 J/kg
Mixed-layer CIN
-96 J/kg
Mixed-layer LCL
867 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
42 m²/s²
0-3 km storm-relative helicity
137 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.9

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 14, 6:52 PM MDTSpecial Weather StatementGGWMcCone38 min
Aug 15, 6:27 AM MDTAreal Flood AdvisoryGGWDawson, Richland, Wibaux12 hr
Aug 15, 1:56 PM MDTSpecial Weather StatementGGWPhillips64 min
Aug 15, 2:33 PM MDTSpecial Weather StatementGGWPhillips57 min
Aug 15, 3:43 PM MDTSpecial Weather StatementGGWPhillips47 min
Aug 15, 3:50 PM MDTSpecial Weather StatementGGWPhillips55 min
Aug 15, 4:15 PM MDTSpecial Weather StatementGGWValley45 min
Aug 15, 4:18 PM MDTSpecial Weather StatementGGW57 min
Aug 15, 4:49 PM MDTSpecial Weather StatementGGWDaniels56 min
Aug 15, 4:59 PM MDTSpecial Weather StatementGGWDaniels61 min
Aug 15, 5:02 PM MDTSpecial Weather StatementGGW58 min
Aug 15, 5:10 PM MDTSpecial Weather StatementGGWValley65 min
Aug 15, 5:27 PM MDTSpecial Weather StatementGGWDaniels63 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.