Alert archive / Montana / Severe Thunderstorm Warnings in 2005

Severe Thunderstorm Warning 67, NWS Billings, MT

June 21, 2005Golden Valley County, Musselshell County, Montana

NWS Billings, MT issued this severe thunderstorm warning at Jun 21, 2005, 6:14 PM MDT for Golden Valley County, Musselshell County, Montana. It was in force for 62 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 21, 2005, 6:14 PM MDT (00:14 UTC)
Expired: Jun 21, 2005, 7:16 PM MDT
In force: 62 min
Issued by: NWS Billings, MT
Area: Counties, with a storm outline in the text

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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 21, 2:25 PM MDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Great_falls, MT (KTFX), launched 00:00Z, 0.2 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: 693 J/kg
Mixed-layer CIN: -101 J/kg
Mixed-layer LCL: 3085 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 167 m²/s²
0-3 km storm-relative helicity: 182 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.1

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 Jun 21, 3:22 PM MDT, 2 hours 52 minutes earlier.

Area forecast discussion, Jun 21, 3:22 PM MDT, 2 hours 52 minutes before

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Hazardous weather outlook, Jun 21, 2:42 PM MDT, 3 hours 32 minutes before

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In the hours before

Local storm report, Jun 21, 4:55 PM MDT, 1 hour 19 minutes before

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Local storm report, Jun 21, 6:03 PM MDT, 11 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
Jun 21, 7:31 PM MDT	Severe Thunderstorm Warning	BYZ	Musselshell, Rosebud, Treasure	59 min
Jun 22, 4:00 PM MDT	Severe Thunderstorm Warning	BYZ	Golden Valley, Musselshell	54 min
Jun 22, 4:20 PM MDT	Severe Thunderstorm Warning	BYZ	Carbon	25 min
Jun 22, 5:47 PM MDT	Severe Thunderstorm Warning	BYZ	Musselshell	41 min

Nearby

Severe Thunderstorm Warnings in Montana, 2005 Every severe thunderstorm warning in 2005

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.