Alert archive / Montana / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 113, NWS Glasgow, MT

August 5, 2013Dawson County, McCone County, Prairie County, Montana

NWS Glasgow, MT issued this severe thunderstorm warning at Aug 5, 2013, 4:35 PM MDT for Dawson County, McCone County, Prairie County, Montana. It was in force for 55 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: Aug 5, 2013, 4:35 PM MDT (22:35 UTC)
Expired: Aug 5, 2013, 5:30 PM MDT
In force: 55 min
Issued by: NWS Glasgow, MT
Area: Storm-based polygon

Counties Dawson County, MT, McCone County, MT, Prairie County, MT

The radar

The Glasgow radar (KGGW), 142 km from the middle of the area, began a volume at 22:36 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 nearest sounding before it

Great_falls, MT (KTFX), launched 12:00Z, 10.6 hours before the alert went out and 395 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: 1833 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 76 m²/s²
0-3 km storm-relative helicity: 97 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Aug 5, 2:42 PM MDT, 1 hour 53 minutes earlier.

Area forecast discussion, Aug 5, 2:42 PM MDT, 1 hour 53 minutes before

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Hazardous weather outlook, Aug 5, 3:02 AM MDT, 13 hours 33 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GLASGOW MT
302 AM MDT MON AUG 5 2013

MTZ016>027-059>062-061000-
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-
302 AM MDT MON AUG 5 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHEAST
MONTANA.

.DAY ONE...TODAY AND TONIGHT

A SHORTWAVE WILL MOVE ACROSS THE AREA THIS AFTERNOON AND EVENING
GENERATING SHOWERS AND THUNDERSTORMS. SOME STORMS COULD POSSIBLY
BECOME SEVERE WITH LARGE HAIL AND GUSTY WINDS... ESPECIALLY ACROSS
THE YELLOWSTONE VALLEY.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

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, Aug 5, 3:13 PM MDT, 1 hour 22 minutes before

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Special weather statement, Aug 5, 3:15 PM MDT, 1 hour 20 minutes before

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Local storm report, Aug 5, 3:34 PM MDT, 1 hour 1 minute before

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Special weather statement, Aug 5, 3:43 PM MDT, 52 minutes before

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Local storm report, Aug 5, 4:19 PM MDT, 16 minutes before

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Local storm report, Aug 5, 4:34 PM MDT, 1 minute 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
Aug 5, 2:14 PM MDT	Special Weather Statement	GGW	Petroleum	61 min
Aug 5, 2:46 PM MDT	Special Weather Statement	GGW	Phillips	59 min
Aug 5, 2:56 PM MDT	Special Weather Statement	GGW	Garfield	64 min
Aug 5, 3:01 PM MDT	Severe Thunderstorm Warning	GGW	Phillips	59 min
Aug 5, 3:15 PM MDT	Special Weather Statement	GGW	Valley	60 min
Aug 5, 3:25 PM MDT	Severe Thunderstorm Warning	GGW	Valley	65 min
Aug 5, 3:43 PM MDT	Special Weather Statement	GGW	McCone	62 min
Aug 5, 3:50 PM MDT	Severe Thunderstorm Warning	GGW	Daniels, Valley	55 min
Aug 5, 3:58 PM MDT	Severe Thunderstorm Warning	GGW	Phillips, Valley	62 min
Aug 5, 4:17 PM MDT	Severe Thunderstorm Warning	GGW	Daniels, Roosevelt, Valley	58 min
Aug 5, 4:22 PM MDT	Severe Thunderstorm Warning	GGW	Valley	53 min
Aug 5, 4:41 PM MDT	Special Weather Statement	GGW	Sheridan	64 min
Aug 5, 4:41 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, McCone, Richland	34 min
Aug 5, 4:49 PM MDT	Severe Thunderstorm Warning	GGW	Daniels	56 min
Aug 5, 4:55 PM MDT	Severe Thunderstorm Warning	GGW	Phillips	65 min
Aug 5, 5:09 PM MDT	Severe Thunderstorm Warning	GGW	McCone, Roosevelt, Valley	66 min
Aug 5, 5:21 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, Prairie, Wibaux	54 min
Aug 5, 5:34 PM MDT	Special Weather Statement	GGW	Petroleum	41 min
Aug 5, 5:38 PM MDT	Severe Thunderstorm Warning	GGW	McCone, Richland, Roosevelt, Valley	67 min
Aug 5, 5:47 PM MDT	Special Weather Statement	GGW	Sheridan	58 min
Aug 5, 5:56 PM MDT	Special Weather Statement	GGW	Wibaux	64 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.