Alert archive / North Dakota / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 221, NWS Bismarck, ND

August 30, 2013McHenry County, Pierce County, North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Aug 30, 2013, 9:50 PM CDT for McHenry County, Pierce County, North Dakota. 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 30, 2013, 9:50 PM CDT (02:50 UTC)
Expired: Aug 30, 2013, 10:45 PM CDT
In force: 55 min
Issued by: NWS Bismarck, ND
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties McHenry County, ND, Pierce County, ND

The radar

The Minot AFB radar (KMBX), 45 km from the middle of the area, began a volume at 02:52 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
Aug 30, 4:01 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 2.8 hours before the alert went out and 166 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: 1314 J/kg
Mixed-layer CIN: -80 J/kg
Mixed-layer LCL: 1975 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 53 m²/s²
0-3 km storm-relative helicity: 134 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.8

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 Aug 30, 9:40 PM CDT, 10 minutes earlier.

Area forecast discussion, Aug 30, 9:40 PM CDT, 10 minutes before

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Hazardous weather outlook, Aug 30, 9:36 PM CDT, 14 minutes before

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In the hours before

Local storm report, Aug 30, 9:28 PM CDT, 22 minutes before

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Special weather statement, Aug 30, 9:30 PM CDT, 20 minutes before

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Local storm report, Aug 30, 9:36 PM CDT, 14 minutes before

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Special weather statement, Aug 30, 9:37 PM CDT, 13 minutes before

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Local storm report, Aug 30, 9:38 PM CDT, 12 minutes before

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Local storm report, Aug 30, 9:43 PM CDT, 7 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
Aug 30, 7:00 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Morton	60 min
Aug 30, 7:13 PM CDT	Tornado Warning Tornado observed	BIS	Morton	32 min
Aug 30, 7:33 PM CDT	Severe Thunderstorm Warning	BIS	Rolette	57 min
Aug 30, 7:35 PM CDT	Severe Thunderstorm Warning	BIS	McLean, Ward	55 min
Aug 30, 7:37 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Morton	53 min
Aug 30, 7:48 PM CDT	Severe Thunderstorm Warning	BIS	McLean, Mercer	57 min
Aug 30, 8:03 PM CDT	Severe Thunderstorm Warning	BIS	Morton, Oliver	27 min
Aug 30, 8:21 PM CDT	Severe Thunderstorm Warning	BIS	McHenry, Ward	39 min
Aug 30, 8:25 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Emmons, Morton	65 min
Aug 30, 8:29 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Morton	46 min
Aug 30, 8:59 PM CDT	Severe Thunderstorm Warning	BIS	McHenry	31 min
Aug 30, 9:06 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Morton	54 min
Aug 30, 10:45 PM CDT	Severe Thunderstorm Warning	BIS	Pierce	45 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.