Alert archive / Montana / Severe Thunderstorm Warnings in 2005

Severe Thunderstorm Warning 6, NWS Glasgow, MT

May 17, 2005McCone County, Valley County, Montana

NWS Glasgow, MT issued this severe thunderstorm warning at May 17, 2005, 3:15 PM MDT for McCone County, Valley County, Montana. It was in force for 65 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: May 17, 2005, 3:15 PM MDT (21:15 UTC)
Expired: May 17, 2005, 4:20 PM MDT
In force: 65 min
Issued by: NWS Glasgow, MT
Area: Counties, with a storm outline in the text

Counties McCone County, MT, Valley County, MT

The radar

The Glasgow radar (KGGW), 37 km from the middle of the area, began a volume at 21:19 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
May 17, 1:30 PM MDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 9.3 hours before the alert went out and 438 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: 812 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 141 m²/s²
0-3 km storm-relative helicity: 179 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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 Glasgow, MT wrote its last area forecast discussion before this severe thunderstorm warning went out at May 17, 2:45 PM MDT, 30 minutes earlier.

Area forecast discussion, May 17, 2:45 PM MDT, 30 minutes before

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Hazardous weather outlook, May 17, 2:20 PM MDT, 55 minutes before

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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 Glasgow, MT issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 17, 10:59 AM MDT	Severe Thunderstorm Warning	GGW	Phillips	46 min
May 17, 12:44 PM MDT	Severe Thunderstorm Warning	GGW	Phillips	66 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.