Alert archive / Montana / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 19, NWS Billings, MT

July 26, 2012Golden Valley County, Musselshell County, Montana

NWS Billings, MT issued this severe thunderstorm warning at Jul 26, 2012, 6:15 PM MDT for Golden Valley County, Musselshell 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: Jul 26, 2012, 6:15 PM MDT (00:15 UTC)
Expired: Jul 26, 2012, 7:15 PM MDT
In force: 60 min
Issued by: NWS Billings, MT
Area: Storm-based polygon

Counties Golden Valley County, MT, Musselshell County, MT

The radar

The Billings radar (KBLX), 67 km from the middle of the area, began a volume at 00:17 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 00:00Z, 0.3 hours before the alert went out and 178 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1 J/kg
Mixed-layer CIN: -185 J/kg
Mixed-layer LCL: 2380 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 113 m²/s²
0-3 km storm-relative helicity: 221 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Billings, MT wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 26, 2:41 PM MDT, 3 hours 34 minutes earlier.

Area forecast discussion, Jul 26, 2:41 PM MDT, 3 hours 34 minutes before

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Hazardous weather outlook, Jul 26, 2:35 PM MDT, 3 hours 40 minutes before

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In the hours before

Special weather statement, Jul 26, 5:48 PM MDT, 27 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 26, 7:22 PM MDT	Special Weather Statement	BYZ	Yellowstone	53 min
Jul 26, 7:50 PM MDT	Special Weather Statement	BYZ	Yellowstone	55 min
Jul 27, 2:39 PM MDT	Special Weather Statement	BYZ	Stillwater	66 min
Jul 27, 3:19 PM MDT	Special Weather Statement	BYZ	Stillwater	56 min
Jul 27, 4:00 PM MDT	Special Weather Statement	BYZ	Yellowstone	45 min

Nearby

Severe Thunderstorm Warnings in Montana, 2012 Every severe thunderstorm warning in 2012

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.