Alert archive / Montana / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 68, NWS Glasgow, MT

July 20, 20134 counties in Montana

NWS Glasgow, MT issued this severe thunderstorm warning at Jul 20, 2013, 5:58 PM MDT for 4 counties in Montana. It was in force for 62 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 20, 2013, 5:58 PM MDT (23:58 UTC)
Expired: Jul 20, 2013, 7:00 PM MDT
In force: 62 min
Issued by: NWS Glasgow, MT
Area: Storm-based polygon

Counties Dawson County, MT, McCone County, MT, Richland County, MT, Roosevelt County, MT

The radar

The Glasgow radar (KGGW), 127 km from the middle of the area, began a volume at 00:05 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.

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 20, 4:22 PM MDT, 1 hour 36 minutes earlier.

Area forecast discussion, Jul 20, 4:22 PM MDT, 1 hour 36 minutes before

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Hazardous weather outlook, Jul 20, 4:49 PM MDT, 1 hour 9 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GLASGOW MT
449 PM MDT SAT JUL 20 2013

MTZ016>027-059>062-211100-
CENTRAL AND SOUTHEAST PHILLIPS-CENTRAL AND SOUTHERN VALLEY-
DANIELS-SHERIDAN-WESTERN ROOSEVELT-PETROLEUM-GARFIELD-MCCONE-
RICHLAND-DAWSON-PRAIRIE-WIBAUX-NORTHERN PHILLIPS-
SOUTHWEST PHILLIPS-NORTHERN VALLEY-EASTERN ROOSEVELT-
449 PM MDT SAT JUL 20 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHEAST
MONTANA.

.DAY ONE...TODAY AND TONIGHT

SCATTERED THUNDERSTORMS ARE EXPECTED THIS AFTERNOON AND TONIGHT...
MOSTLY NEAR THE CANADIAN AND NORTH DAKOTA BORDERS. STRONGER STORMS
WILL LIKELY HAVE SOME BRIEF HEAVY RAIN...SMALL HAIL...GUSTY WINDS.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

A COLD FRONT MOVING THROUGH THE REGION ON SUNDAY WILL GENERATE
GUSTY NORTHWEST WIND. THEREFORE A LAKE WIND ADVISORY IS IN EFFECT
FOR FORT PECK LAKE FROM NOON UNTIL 9 PM SUNDAY.

.SPOTTER INFORMATION STATEMENT...

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

In the hours before

Special weather statement, Jul 20, 3:15 PM MDT, 2 hours 43 minutes before

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Special weather statement, Jul 20, 3:54 PM MDT, 2 hours 4 minutes before

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Special weather statement, Jul 20, 4:33 PM MDT, 1 hour 25 minutes before

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Special weather statement, Jul 20, 5:31 PM MDT, 27 minutes before

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Local storm report, Jul 20, 5:42 PM MDT, 16 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GLASGOW MT
542 PM MDT SAT JUL 20 2013

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

0535 PM     HAIL             4 N OSWEGO              48.11N 105.89W
07/20/2013  E0.88 INCH       VALLEY             MT   TRAINED SPOTTER

            SPOTTER ON THE EDGE OF THE STORM REPORTED PEA AND NICKEL
            SIZED HAIL.

&&

MATTM

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 19, 7:55 PM MDT	Special Weather Statement	GGW	Sheridan	50 min
Jul 19, 8:20 PM MDT	Special Weather Statement	GGW	Sheridan	40 min
Jul 19, 8:54 PM MDT	Special Weather Statement	GGW	Sheridan	66 min
Jul 19, 9:54 PM MDT	Special Weather Statement	GGW	Sheridan	51 min
Jul 20, 2:34 PM MDT	Lake Wind Advisory	GGW	Garfield, McCone, Petroleum, Phillips, Valley	30 hr
Jul 20, 3:15 PM MDT	Special Weather Statement	GGW	Daniels	60 min
Jul 20, 3:36 PM MDT	Severe Thunderstorm Warning	GGW	Daniels	54 min
Jul 20, 3:54 PM MDT	Special Weather Statement	GGW	Valley	66 min
Jul 20, 4:02 PM MDT	Severe Thunderstorm Warning	GGW	Valley	58 min
Jul 20, 4:33 PM MDT	Special Weather Statement	GGW	Daniels	57 min
Jul 20, 4:57 PM MDT	Severe Thunderstorm Warning	GGW	McCone, Roosevelt, Valley	63 min
Jul 20, 5:31 PM MDT	Special Weather Statement	GGW	Roosevelt	59 min

Nearby

Severe Thunderstorm Warnings in Montana, 2013 Every severe thunderstorm warning in 2013

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.