Alert archive / Montana / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 11, NWS Glasgow, MT

June 28, 2017Dawson County, McCone County, Prairie County, Montana

NWS Glasgow, MT issued this severe thunderstorm warning at Jun 28, 2017, 3:15 PM MDT for Dawson County, McCone County, Prairie County, Montana. It was in force for 60 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
Jun 28, 2017, 3:15 PM MDT (21:15 UTC)
Expired
Jun 28, 2017, 4:15 PM MDT
In force
60 min
Issued by
NWS Glasgow, MT
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Dawson County, MT, McCone County, MT, Prairie County, MT

The radar

The Glasgow radar (KGGW), 142 km from the middle of the area, began a volume at 21:17 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, 9.3 hours before the alert went out and 395 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 2017-06-28Temperature 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 2017-06-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -3 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
2455 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
-3 m²/s²
0-3 km storm-relative helicity
14 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
Jun 27, 7:00 PM MDTSpecial Weather StatementGGWDawson60 min
Jun 28, 12:41 PM MDTSpecial Weather StatementGGWValley34 min
Jun 28, 1:18 PM MDTSpecial Weather StatementGGWValley42 min
Jun 28, 1:31 PM MDTSevere Thunderstorm WarningGGWMcCone59 min
Jun 28, 1:57 PM MDTLake Wind AdvisoryGGWGarfield, McCone, Petroleum, Phillips, Valley31 hr
Jun 28, 2:10 PM MDTSevere Thunderstorm WarningGGWDawson, McCone, Richland47 min
Jun 28, 2:38 PM MDTSpecial Weather StatementGGWDawson, McCone, Prairie37 min

Nearby

Severe Thunderstorm Warnings in Montana, 2017Every severe thunderstorm warning in 2017

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.