Alert archive / Montana / Severe Thunderstorm Warnings in 2004

Severe Thunderstorm Warning 49, NWS Billings, MT

July 11, 2004Powder River County, Montana

NWS Billings, MT issued this severe thunderstorm warning at Jul 11, 2004, 5:02 PM MDT for Powder River County, Montana. It was in force for 58 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 11, 2004, 5:02 PM MDT (23:02 UTC)
Expired: Jul 11, 2004, 6:00 PM MDT
In force: 58 min
Issued by: NWS Billings, MT
Area: Counties, with a storm outline in the text

County Powder River County, MT

The radar

The Billings radar (KBLX), 237 km from the middle of the area, began a volume at 23:04 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
Jul 11, 2:40 PM MDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Glasgow Intl Airport, MT (KGGW), launched 12:00Z, 11.0 hours before the alert went out and 323 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: 98 J/kg
Mixed-layer CIN: -523 J/kg
Mixed-layer LCL: 1856 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 212 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 11, 2:44 PM MDT, 2 hours 18 minutes earlier.

Area forecast discussion, Jul 11, 2:44 PM MDT, 2 hours 18 minutes before

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Hazardous weather outlook, Jul 11, 2:49 PM MDT, 2 hours 13 minutes before

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      <div class="status" id="status">Temporary Notice</div>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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        Please try again in a few minutes.
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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 10, 7:00 PM MDT	Flash Flood Warning	BYZ	Custer, Fallon	2 hr
Jul 10, 7:05 PM MDT	Severe Thunderstorm Warning	BYZ	Fallon	55 min
Jul 10, 7:22 PM MDT	Severe Thunderstorm Warning	BYZ	Custer	53 min
Jul 10, 7:54 PM MDT	Severe Thunderstorm Warning	BYZ	Rosebud	66 min
Jul 10, 8:26 PM MDT	Severe Thunderstorm Warning	BYZ	Fallon	64 min
Jul 10, 10:10 PM MDT	Severe Thunderstorm Warning	BYZ	Rosebud	65 min
Jul 11, 3:42 PM MDT	Severe Thunderstorm Warning	BYZ	Musselshell	63 min
Jul 11, 4:50 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn	55 min
Jul 11, 5:07 PM MDT	Severe Thunderstorm Warning	BYZ	Rosebud	53 min
Jul 11, 5:39 PM MDT	Severe Thunderstorm Warning	BYZ	Yellowstone	36 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.