Alert archive / Montana / Severe Thunderstorm Warnings in 2004

Severe Thunderstorm Warning 82, NWS Billings, MT

August 6, 2004Big Horn County, Montana

NWS Billings, MT issued this severe thunderstorm warning at Aug 6, 2004, 7:11 PM MDT for Big Horn County, Montana. It was in force for 64 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: Aug 6, 2004, 7:11 PM MDT (01:11 UTC)
Expired: Aug 6, 2004, 8:15 PM MDT
In force: 64 min
Issued by: NWS Billings, MT
Area: Counties, with a storm outline in the text

County Big Horn County, MT

The radar

The Billings radar (KBLX), 99 km from the middle of the area, began a volume at 01:11 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
Aug 6, 2:30 PM MDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Great_falls, MT (KTFX), launched 00:00Z, 1.2 hours before the alert went out and 329 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 4495 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 2 m²/s²
0-3 km storm-relative helicity: 32 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 Aug 6, 2:48 PM MDT, 4 hours 23 minutes earlier.

Area forecast discussion, Aug 6, 2:48 PM MDT, 4 hours 23 minutes before

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Hazardous weather outlook, Aug 6, 2:38 PM MDT, 4 hours 33 minutes before

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        The site you requested is temporarily down for maintenance or an unexpected outage.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 7, 2:01 PM MDT	Severe Thunderstorm Warning	BYZ	Carter	59 min

Nearby

Severe Thunderstorm Warnings in Montana, 2004 Every severe thunderstorm warning in 2004

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.