Alert archive / North Dakota / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 117, NWS Bismarck, ND

July 11, 20134 counties in North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Jul 11, 2013, 5:58 PM MDT for 4 counties in North Dakota. It was in force for 47 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 11, 2013, 5:58 PM MDT (23:58 UTC)
Expired: Jul 11, 2013, 6:45 PM MDT
In force: 47 min
Issued by: NWS Bismarck, ND
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Dunn County, ND, McKenzie County, ND, Mountrail County, ND, Williams County, ND

The radar

The Minot AFB radar (KMBX), 165 km from the middle of the area, began a volume at 00:01 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 11, 3:50 PM MDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Glasgow Intl Airport, MT (KGGW), launched 12:00Z, 12.0 hours before the alert went out and 272 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: 592 J/kg
Mixed-layer CIN: -324 J/kg
Mixed-layer LCL: 2456 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 182 m²/s²
0-3 km storm-relative helicity: 228 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.1

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 Bismarck, ND wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 11, 5:41 PM MDT, 17 minutes earlier.

Area forecast discussion, Jul 11, 5:41 PM MDT, 17 minutes before

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Hazardous weather outlook, Jul 11, 5:50 PM MDT, 8 minutes before

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In the hours before

Special weather statement, Jul 11, 3:46 PM MDT, 2 hours 12 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BISMARCK ND
446 PM CDT THU JUL 11 2013

NDZ031-032-040-043-112300-
GOLDEN VALLEY-BILLINGS-SLOPE-BOWMAN-
INCLUDING THE CITIES OF...BEACH...MEDORA...MARMARTH...BOWMAN
346 PM MDT THU JUL 11 2013

...STRONG TO SEVERE THUNDERSTORMS TO ENTER SOUTHWEST NORTH DAKOTA
BY 430 PM MDT...

STRONG TO SEVERE THUNDERSTORMS CONTINUE TO DEVELOP ACROSS
SOUTHEAST MONTANA THIS AFTERNOON...AND ARE EXPECTED TO CONTINUE TO
MOVE EAST AND APPROACH THE NORTH DAKOTA BORDER BY 430 PM
MDT FROM TROTTERS THROUGH BEACH AND MARMARTH. THOSE ACROSS
SOUTHWEST NORTH DAKOTA SHOULD BE ALERT TO THE POTENTIAL FOR
INCOMING STRONG TO SEVERE THUNDERSTORMS CAPABLE OF LARGE
HAIL...DAMAGING WINDS AND DANGEROUS LIGHTNING.

AYD

Local storm report, Jul 11, 5:00 PM MDT, 58 minutes before

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Local storm report, Jul 11, 5:02 PM MDT, 56 minutes before

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Local storm report, Jul 11, 5:09 PM MDT, 49 minutes before

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Special weather statement, Jul 11, 5:22 PM MDT, 36 minutes before

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The office that day

Everything else NWS Bismarck, ND issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 11, 4:33 PM MDT	Severe Thunderstorm Warning	BIS	Billings, Golden Valley	42 min
Jul 11, 4:46 PM MDT	Severe Thunderstorm Warning	BIS	McKenzie	44 min
Jul 11, 5:25 PM MDT	Severe Thunderstorm Warning	BIS	McKenzie, Williams	50 min
Jul 11, 5:36 PM MDT	Severe Thunderstorm Warning	BIS	Billings, Golden Valley, Slope, Stark	39 min
Jul 11, 5:52 PM MDT	Tornado Warning	BIS	Billings, Stark	23 min

Nearby

Severe Thunderstorm Warnings in North Dakota, 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.