Alert archive / Montana / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 93, NWS Glasgow, MT

July 6, 2016Dawson County, Prairie County, Wibaux County, Montana

NWS Glasgow, MT issued this severe thunderstorm warning at Jul 6, 2016, 3:11 PM MDT for Dawson County, Prairie County, Wibaux County, Montana. It was in force for 49 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 6, 2016, 3:11 PM MDT (21:11 UTC)
Expired: Jul 6, 2016, 4:00 PM MDT
In force: 49 min
Issued by: NWS Glasgow, MT
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Dawson County, MT, Prairie County, MT, Wibaux County, MT

The radar

The Glasgow radar (KGGW), 187 km from the middle of the area, began a volume at 21:13 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 6, 12:55 PM MDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 9.2 hours before the alert went out and 316 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: 10 J/kg
Mixed-layer CIN: -272 J/kg
Mixed-layer LCL: 1523 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 11 m²/s²
0-3 km storm-relative helicity: -21 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 Jul 6, 2:12 PM MDT, 59 minutes earlier.

Area forecast discussion, Jul 6, 2:12 PM MDT, 59 minutes before

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Hazardous weather outlook, Jul 6, 3:27 AM MDT, 11 hours 44 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GLASGOW MT
327 AM MDT WED JUL 6 2016

MTZ016>027-059>062-070930-
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-
327 AM MDT WED JUL 6 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHEAST
MONTANA.

.DAY ONE...TODAY AND TONIGHT

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER TODAY AND
TONIGHT IS LOW.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

A LARGE STORM SYSTEM AND COLD FRONT IS EXPECTED TO IMPACT
NORTHEAST MONTANA OVER THE WEEKEND. SEVERE STORMS ARE POSSIBLE
ON SUNDAY ALONG WITH HEAVY RAINFALL. ESTIMATED RAINFALL TOTALS
ARE UNCERTAIN AS WEATHER MODELS CONTINUE TO EVOLVE.

.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 6, 12:39 PM MDT, 2 hours 32 minutes before

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Local storm report, Jul 6, 1:22 PM MDT, 1 hour 49 minutes before

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Local storm report, Jul 6, 1:40 PM MDT, 1 hour 31 minutes before

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Local storm report, Jul 6, 2:00 PM MDT, 1 hour 11 minutes before

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Special weather statement, Jul 6, 2:01 PM MDT, 1 hour 10 minutes before

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Special weather statement, Jul 6, 2:48 PM MDT, 23 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 6, 11:07 AM MDT	Severe Thunderstorm Warning	GGW	Garfield	53 min
Jul 6, 11:40 AM MDT	Severe Thunderstorm Warning	GGW	Garfield	65 min
Jul 6, 12:15 PM MDT	Special Weather Statement	GGW	Prairie	45 min
Jul 6, 12:41 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, Garfield, McCone, Prairie	64 min
Jul 6, 1:13 PM MDT	Severe Thunderstorm Warning	GGW	Dawson	62 min
Jul 6, 1:43 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, McCone, Prairie	62 min
Jul 6, 2:01 PM MDT	Special Weather Statement	GGW	Prairie	44 min
Jul 6, 2:04 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, Wibaux	56 min
Jul 6, 2:21 PM MDT	Areal Flood Warning	GGW	Dawson	3 hr
Jul 6, 2:22 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, Prairie	53 min
Jul 6, 2:48 PM MDT	Special Weather Statement	GGW	Wibaux	57 min

Nearby

Severe Thunderstorm Warnings in Montana, 2016 Every severe thunderstorm warning in 2016

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.