Alert archive / Montana / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 19, NWS Billings, MT

July 10, 2017Carter County, Custer County, Fallon County, Montana

NWS Billings, MT issued this severe thunderstorm warning at Jul 10, 2017, 6:32 PM MDT for Carter County, Custer County, Fallon County, Montana. It was in force for 73 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 10, 2017, 6:32 PM MDT (00:32 UTC)
Expired
Jul 10, 2017, 7:45 PM MDT
In force
73 min
Issued by
NWS Billings, MT
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Carter County, MT, Custer County, MT, Fallon County, MT

The nearest sounding before it

Glasgow Intl Airport, MT (KGGW), launched 00:00Z, 0.5 hours before the alert went out and 277 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 2017-07-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 23 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 2017-07-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -65 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
23 J/kg
Mixed-layer CIN
-20 J/kg
Mixed-layer LCL
3773 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
-65 m²/s²
0-3 km storm-relative helicity
7 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 10, 6:58 PM MDTSpecial Weather StatementBYZPark47 min
Jul 10, 7:20 PM MDTSpecial Weather StatementBYZStillwater40 min
Jul 10, 7:52 PM MDTSpecial Weather StatementBYZCarter53 min
Jul 11, 4:06 PM MDTSpecial Weather StatementBYZPark39 min
Jul 11, 4:41 PM MDTSpecial Weather StatementBYZStillwater49 min
Jul 10, 6:03 PM MDTSpecial Weather StatementBYZSheridan57 min
Jul 10, 7:24 PM MDTSpecial Weather StatementBYZSheridan51 min
Jul 11, 5:08 PM MDTSpecial Weather StatementBYZSheridan67 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.