Alert archive / Montana / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 138, NWS Glasgow, MT

August 9, 2016Phillips County, Valley County, Montana

NWS Glasgow, MT issued this severe thunderstorm warning at Aug 9, 2016, 9:59 PM MDT for Phillips County, Valley County, Montana. It was in force for 61 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 9, 2016, 9:59 PM MDT (03:59 UTC)
Expired
Aug 9, 2016, 11:00 PM MDT
In force
61 min
Issued by
NWS Glasgow, MT
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Phillips County, MT, Valley County, MT

The radar

The Glasgow radar (KGGW), 51 km from the middle of the area, began a volume at 04:01 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Aug 9, 4:53 PM MDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Glasgow Intl Airport, MT (KGGW), launched 00:00Z, 4.0 hours before the alert went out and 52 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, Glasgow Intl Airport, MT at 00:00Z on 2016-08-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 242 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, Glasgow Intl Airport, MT at 00:00Z on 2016-08-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -17 square meters per square second.1939587897Sfc1 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
242 J/kg
Mixed-layer CIN
-260 J/kg
Mixed-layer LCL
2412 m above ground
0-6 km bulk shear
57 kt
0-1 km storm-relative helicity
-17 m²/s²
0-3 km storm-relative helicity
191 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 9, 8:57 PM MDTSpecial Weather StatementGGW63 min
Aug 9, 9:39 PM MDTSpecial Weather StatementGGWWibaux66 min
Aug 9, 10:46 PM MDTSevere Thunderstorm WarningGGWGarfield, McCone, Phillips, Valley59 min
Aug 9, 10:51 PM MDTSpecial Weather StatementGGWPhillips39 min
Aug 9, 11:35 PM MDTSpecial Weather StatementGGWPhillips55 min
Aug 9, 11:45 PM MDTSpecial Weather StatementGGWValley45 min
Aug 10, 12:23 AM MDTSpecial Weather StatementGGWValley67 min
Aug 10, 1:08 PM MDTSpecial Weather StatementGGWSheridan52 min
Aug 10, 2:26 PM MDTSpecial Weather StatementGGWSheridan64 min

Nearby

Severe Thunderstorm Warnings in Montana, 2016Every severe thunderstorm warning in 2016

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.