Alert archive / Montana / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 9, NWS Missoula, MT

July 7, 2019Deer Lodge County, Powell County, Montana

NWS Missoula, MT issued this severe thunderstorm warning at Jul 7, 2019, 4:14 PM MDT for Deer Lodge County, Powell County, Montana. It was in force for 31 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 7, 2019, 4:14 PM MDT (22:14 UTC)
Expired
Jul 7, 2019, 4:45 PM MDT
In force
31 min
Issued by
NWS Missoula, MT
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Deer Lodge County, MT, Powell County, MT

The radar

The Missoula radar (KMSX), 99 km from the middle of the area, began a volume at 22:15 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

Spokane, WA (KOTX), launched 12:00Z, 10.2 hours before the alert went out and 292 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, Spokane, WA at 12:00Z on 2019-07-07Temperature 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, Spokane, WA at 12:00Z on 2019-07-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 23 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1704 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
23 m²/s²
0-3 km storm-relative helicity
58 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 6, 6:20 PM MDTSpecial Weather StatementMSOLake25 min
Jul 6, 6:59 PM MDTSpecial Weather StatementMSOMissoula31 min
Jul 6, 8:11 PM MDTSpecial Weather StatementMSOFlathead34 min
Jul 6, 8:14 PM MDTSpecial Weather StatementMSOFlathead31 min
Jul 6, 8:21 PM MDTSpecial Weather StatementMSORavalli24 min
Jul 6, 8:27 PM MDTSevere Thunderstorm WarningMSORavalli33 min
Jul 6, 8:57 PM MDTSpecial Weather StatementMSOGranite33 min
Jul 6, 10:10 PM MDTSpecial Weather StatementMSOLake50 min
Jul 7, 2:23 PM MDTSpecial Weather StatementMSORavalli37 min
Jul 7, 3:27 PM MDTSpecial Weather StatementMSODeer Lodge18 min
Jul 7, 4:01 PM MDTSpecial Weather StatementMSODeer Lodge14 min
Jul 7, 5:43 PM MDTSpecial Weather StatementMSORavalli32 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.