Alert archive / Montana / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 10, NWS Glasgow, MT

May 28, 2014Dawson County, McCone County, Prairie County, Montana

NWS Glasgow, MT issued this severe thunderstorm warning at May 28, 2014, 7:47 PM MDT for Dawson County, McCone County, Prairie County, Montana. It was in force for 58 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 28, 2014, 7:47 PM MDT (01:47 UTC)
Expired: May 28, 2014, 8:45 PM MDT
In force: 58 min
Issued by: NWS Glasgow, MT
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

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 01:50 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 28, 4:59 PM MDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Glasgow Intl Airport, MT (KGGW), launched 00:00Z, 1.8 hours before the alert went out and 142 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: 2700 J/kg
Mixed-layer CIN: -27 J/kg
Mixed-layer LCL: 1848 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 46 m²/s²
0-3 km storm-relative helicity: 251 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 16.2

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 May 28, 5:04 PM MDT, 2 hours 43 minutes earlier.

Area forecast discussion, May 28, 5:04 PM MDT, 2 hours 43 minutes before

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Hazardous weather outlook, May 28, 3:24 AM MDT, 16 hours 23 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GLASGOW MT
324 AM MDT WED MAY 28 2014

MTZ016>027-059>062-290930-
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-
324 AM MDT WED MAY 28 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHEAST
MONTANA.

.DAY ONE...TODAY AND TONIGHT

SEVERE THUNDERSTORMS WILL AFFECT NORTHEAST MONTANA THIS AFTERNOON AND
EVENING. IMPACTS NORTH OF THE MISSOURI RIVER WILL BE FROM LARGE
HAIL...DAMAGING WINDS...HEAVY RAIN AND POSSIBLY A TORNADO. SOUTH
OF THE MISSOURI RIVER...DAMAGING WINDS WILL BE THE GREATEST
THREAT.

THE STORMS WILL MOVE NORTHWARD INTO CANADA LATE TONIGHT.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

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

Special weather statement, May 28, 7:04 PM MDT, 43 minutes before

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Special weather statement, May 28, 7:40 PM MDT, 7 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 28, 7:04 PM MDT	Special Weather Statement	GGW	Prairie	56 min
May 28, 7:40 PM MDT	Special Weather Statement	GGW	McCone	50 min
May 28, 8:00 PM MDT	Special Weather Statement	GGW	McCone	45 min
May 28, 8:26 PM MDT	Special Weather Statement	GGW	Dawson	49 min
May 28, 8:34 PM MDT	Severe Thunderstorm Warning	GGW	Phillips, Valley	56 min
May 28, 8:38 PM MDT	Lake Wind Advisory	GGW	Garfield, McCone, Petroleum, Phillips, Valley	23 hr
May 28, 8:56 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, McCone, Richland	64 min
May 28, 9:25 PM MDT	Severe Thunderstorm Warning	GGW	Phillips, Valley	65 min
May 28, 9:36 PM MDT	Special Weather Statement	GGW	Roosevelt	39 min
May 28, 10:02 PM MDT	Special Weather Statement	GGW	Valley	58 min
May 28, 10:17 PM MDT	Special Weather Statement	GGW	Sheridan	43 min
May 28, 11:22 PM MDT	Special Weather Statement	GGW	Phillips	38 min

Nearby

Severe Thunderstorm Warnings in Montana, 2014 Every severe thunderstorm warning in 2014

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.