Alert archive / Montana / Severe Thunderstorm Warnings in 2004

Severe Thunderstorm Warning 22, NWS Glasgow, MT

July 10, 2004Wibaux County, Montana

NWS Glasgow, MT issued this severe thunderstorm warning at Jul 10, 2004, 7:35 PM MDT for Wibaux County, Montana. It was in force for 55 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, 2004, 7:35 PM MDT (01:35 UTC)
Expired: Jul 10, 2004, 8:30 PM MDT
In force: 55 min
Issued by: NWS Glasgow, MT
Area: Counties, with a storm outline in the text

County Wibaux County, MT

The radar

The Glasgow radar (KGGW), 225 km from the middle of the area, began a volume at 01:36 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 10, 5:30 PM MDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 1.6 hours before the alert went out and 271 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: 3426 J/kg
Mixed-layer CIN: -13 J/kg
Mixed-layer LCL: 843 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 84 m²/s²
0-3 km storm-relative helicity: 150 m²/s²
Significant tornado parameter: 1.8
Supercell composite: 9.7

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 Glasgow, MT wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 10, 5:40 PM MDT, 1 hour 55 minutes earlier.

Area forecast discussion, Jul 10, 5:40 PM MDT, 1 hour 55 minutes before

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Hazardous weather outlook, Jul 10, 6:00 AM MDT, 13 hours 35 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 10, 9:32 PM MDT	Severe Thunderstorm Warning	GGW	Garfield	58 min
Jul 11, 5:00 PM MDT	Severe Thunderstorm Warning	GGW	Phillips	60 min
Jul 11, 5:16 PM MDT	Severe Thunderstorm Warning	GGW	Phillips	59 min
Jul 11, 5:42 PM MDT	Tornado Warning	GGW	Phillips	63 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.