Alert archive / Montana / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 32, NWS Glasgow, MT

June 17, 2008Garfield County, Petroleum County, Phillips County, Montana

NWS Glasgow, MT issued this severe thunderstorm warning at Jun 17, 2008, 9:11 PM MDT for Garfield County, Petroleum County, Phillips 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: Jun 17, 2008, 9:11 PM MDT (03:11 UTC)
Expired: Jun 17, 2008, 10:15 PM MDT
In force: 64 min
Issued by: NWS Glasgow, MT
Area: Storm-based polygon

Counties Garfield County, MT, Petroleum County, MT, Phillips County, MT

The radar

The Glasgow radar (KGGW), 109 km from the middle of the area, began a volume at 03:14 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 17, 5:48 PM MDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Glasgow Intl Airport, MT (KGGW), launched 00:00Z, 3.2 hours before the alert went out and 112 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: 789 J/kg
Mixed-layer CIN: -27 J/kg
Mixed-layer LCL: 2323 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 51 m²/s²
0-3 km storm-relative helicity: 181 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.4

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 Jun 17, 2:40 PM MDT, 6 hours 31 minutes earlier.

Area forecast discussion, Jun 17, 2:40 PM MDT, 6 hours 31 minutes before

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Hazardous weather outlook, Jun 17, 6:29 PM MDT, 2 hours 42 minutes before

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In the hours before

Local storm report, Jun 17, 3:54 PM MDT, 5 hours 17 minutes before

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Local storm report, Jun 17, 8:55 PM MDT, 16 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
Jun 17, 8:24 PM MDT	Severe Thunderstorm Warning	GGW	Petroleum	66 min
Jun 17, 10:43 PM MDT	Severe Thunderstorm Warning	GGW	Phillips	47 min
Jun 17, 10:52 PM MDT	Severe Thunderstorm Warning	GGW	Valley	38 min
Jun 17, 11:26 PM MDT	Severe Thunderstorm Warning	GGW	Valley	31 min
Jun 18, 12:47 AM MDT	Severe Thunderstorm Warning	GGW	Daniels, Valley	43 min
Jun 18, 3:37 PM MDT	Severe Thunderstorm Warning	GGW	Richland, Roosevelt	23 min

Nearby

Severe Thunderstorm Warnings in Montana, 2008 Every severe thunderstorm warning in 2008

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.