Alert archive / Montana / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 129, NWS Glasgow, MT

July 29, 2011Roosevelt County, Sheridan County, Montana

NWS Glasgow, MT issued this severe thunderstorm warning at Jul 29, 2011, 7:56 PM MDT for Roosevelt County, Sheridan County, Montana. It was in force for 19 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 29, 2011, 7:56 PM MDT (01:56 UTC)
Expired: Jul 29, 2011, 8:15 PM MDT
In force: 19 min
Issued by: NWS Glasgow, MT
Area: Storm-based polygon

Counties Roosevelt County, MT, Sheridan County, MT

The radar

The Glasgow radar (KGGW), 142 km from the middle of the area, began a volume at 01:57 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 29, 5:02 PM MDT	Severe Thunderstorm Watch	SPC	6 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 Jul 29, 2:54 PM MDT, 5 hours 2 minutes earlier.

Area forecast discussion, Jul 29, 2:54 PM MDT, 5 hours 2 minutes before

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Hazardous weather outlook, Jul 29, 6:21 AM MDT, 13 hours 35 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GLASGOW MT
621 AM MDT FRI JUL 29 2011

MTZ018>020-023>027-062-301100-
DANIELS-SHERIDAN-WESTERN ROOSEVELT-MCCONE-RICHLAND-DAWSON-PRAIRIE-
WIBAUX-EASTERN ROOSEVELT-
621 AM MDT FRI JUL 29 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHEAST
MONTANA.

.DAY ONE...TODAY AND TONIGHT

THERE IS A CHANCE OF THUNDERSTORMS THIS AFTERNOON AND EVENING. A
FEW STORMS MAY BECOME SEVERE WITH LARGE HAIL AND DAMAGING WINDS.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

In the hours before

Local storm report, Jul 29, 6:15 PM MDT, 1 hour 41 minutes before

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Local storm report, Jul 29, 6:22 PM MDT, 1 hour 34 minutes before

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Local storm report, Jul 29, 6:29 PM MDT, 1 hour 27 minutes before

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Local storm report, Jul 29, 6:52 PM MDT, 1 hour 4 minutes before

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Local storm report, Jul 29, 6:54 PM MDT, 1 hour 2 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GLASGOW MT
654 PM MDT FRI JUL 29 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0640 PM     HAIL             12 SE BREDETTE          48.40N 105.08W
07/29/2011  E1.00 INCH       ROOSEVELT          MT   TRAINED SPOTTER

            ESTIMATED 1 INCH HAIL.

&&

RMORGAN

Local storm report, Jul 29, 7:48 PM MDT, 8 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 29, 6:07 PM MDT	Severe Thunderstorm Warning	GGW	Roosevelt, Sheridan	53 min
Jul 29, 6:26 PM MDT	Severe Thunderstorm Warning	GGW	McCone, Richland	34 min
Jul 29, 6:51 PM MDT	Severe Thunderstorm Warning	GGW	Roosevelt, Sheridan	54 min
Jul 29, 6:57 PM MDT	Severe Thunderstorm Warning	GGW	McCone, Richland	33 min
Jul 29, 7:17 PM MDT	Tornado Warning	GGW	Roosevelt, Sheridan	28 min
Jul 29, 7:29 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, Richland	31 min
Jul 29, 7:33 PM MDT	Tornado Warning	GGW	Dawson, Richland	27 min
Jul 29, 7:38 PM MDT	Tornado Warning	GGW	Roosevelt, Sheridan	22 min
Jul 29, 7:54 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, Richland, Wibaux	66 min
Jul 29, 8:11 PM MDT	Tornado Warning	GGW	Richland	34 min
Jul 29, 8:41 PM MDT	Tornado Warning	GGW	Richland, Wibaux	34 min
Jul 29, 8:58 PM MDT	Severe Thunderstorm Warning	GGW	Richland, Wibaux	52 min

Nearby

Severe Thunderstorm Warnings in Montana, 2011 Every severe thunderstorm warning in 2011

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.