Alert archive / Montana / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 101, NWS Glasgow, MT

July 30, 2019McCone County, Montana

NWS Glasgow, MT issued this severe thunderstorm warning at Jul 30, 2019, 7:07 PM MDT for McCone County, Montana. It was in force for 53 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
Jul 30, 2019, 7:07 PM MDT (01:07 UTC)
Expired
Jul 30, 2019, 8:00 PM MDT
In force
53 min
Issued by
NWS Glasgow, MT
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County McCone County, MT

The radar

The Glasgow radar (KGGW), 88 km from the middle of the area, began a volume at 01:09 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
Jul 30, 5:08 PM MDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Great_falls, MT (KTFX), launched 00:00Z, 1.1 hours before the alert went out and 361 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 2019-07-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 81 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 00:00Z on 2019-07-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 7 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
81 J/kg
Mixed-layer CIN
-43 J/kg
Mixed-layer LCL
3074 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
7 m²/s²
0-3 km storm-relative helicity
22 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
Jul 30, 6:14 PM MDTSevere Thunderstorm WarningGGWGarfield, McCone, Roosevelt, Valley61 min
Jul 30, 6:23 PM MDTSevere Thunderstorm WarningGGWDawson, McCone67 min
Jul 30, 6:33 PM MDTSpecial Weather StatementGGWMcCone42 min
Jul 30, 6:37 PM MDTSevere Thunderstorm WarningGGWDawson, Prairie, Wibaux53 min
Jul 30, 7:10 PM MDTSevere Thunderstorm WarningGGWDaniels, Valley65 min
Jul 30, 7:18 PM MDTSevere Thunderstorm WarningGGWDawson, McCone, Prairie57 min
Jul 30, 7:30 PM MDTSevere Thunderstorm WarningGGWPrairie29 min
Jul 30, 7:49 PM MDTSevere Thunderstorm WarningGGWDawson, McCone56 min
Jul 30, 8:06 PM MDTSpecial Weather StatementGGWDawson, Wibaux39 min
Jul 30, 8:10 PM MDTSevere Thunderstorm WarningGGWDaniels, Roosevelt, Sheridan65 min
Jul 30, 8:11 PM MDTFlash Flood WarningGGWPrairie107 min
Jul 30, 8:35 PM MDTSpecial Weather StatementGGWDawson40 min
Jul 30, 9:31 PM MDTSpecial Weather StatementGGWRoosevelt44 min
Jul 30, 9:56 PM MDTSpecial Weather StatementGGWPrairie49 min

Nearby

Severe Thunderstorm Warnings in Montana, 2019Every severe thunderstorm warning in 2019

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.