Alert archive / Montana / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 31, NWS Glasgow, MT

May 20, 2007Garfield County, Petroleum County, Montana

NWS Glasgow, MT issued this severe thunderstorm warning at May 20, 2007, 7:54 PM MDT for Garfield County, Petroleum County, Montana. It was in force for 66 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 20, 2007, 7:54 PM MDT (01:54 UTC)
Expired: May 20, 2007, 9:00 PM MDT
In force: 66 min
Issued by: NWS Glasgow, MT
Area: Counties, with a storm outline in the text

Counties Garfield County, MT, Petroleum County, MT

The radar

The Glasgow radar (KGGW), 135 km from the middle of the area, began a volume at 01:56 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 20, 2:33 PM MDT	Severe Thunderstorm Watch	SPC	9 hr

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 20, 2:38 PM MDT, 5 hours 16 minutes earlier.

Area forecast discussion, May 20, 2:38 PM MDT, 5 hours 16 minutes before

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Hazardous weather outlook, May 20, 3:59 AM MDT, 15 hours 55 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
May 20, 8:57 PM MDT	Severe Thunderstorm Warning	GGW	Garfield	63 min
May 20, 9:58 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, McCone, Prairie	62 min
May 20, 11:00 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, McCone, Prairie	60 min
May 20, 11:57 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, Prairie	63 min
May 21, 12:34 AM MDT	Severe Thunderstorm Warning	GGW	Dawson, Richland	56 min
May 21, 1:14 AM MDT	Severe Thunderstorm Warning	GGW	Richland	46 min

Nearby

Severe Thunderstorm Warnings in Montana, 2007 Every severe thunderstorm warning in 2007

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.