Alert archive / North Dakota / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 159, NWS Bismarck, ND

July 21, 2013Emmons County, Sioux County, North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Jul 21, 2013, 8:07 PM CDT for Emmons County, Sioux County, North Dakota. It was in force for 53 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 21, 2013, 8:07 PM CDT (01:07 UTC)
Expired: Jul 21, 2013, 9:00 PM CDT
In force: 53 min
Issued by: NWS Bismarck, ND
Area: Storm-based polygon
Tornado: Possible
Hail: 1.0 in
Wind: 60.0 mph

Counties Emmons County, ND, Sioux County, ND

The radar

The Bismarck radar (KBIS), 64 km from the middle of the area, began a volume at 01:07 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 21, 2:43 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 1.1 hours before the alert went out and 64 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: 1626 J/kg
Mixed-layer CIN: -60 J/kg
Mixed-layer LCL: 1780 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 186 m²/s²
0-3 km storm-relative helicity: 262 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 6.5

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 21, 7:15 PM CDT, 52 minutes earlier.

Area forecast discussion, Jul 21, 7:15 PM CDT, 52 minutes before

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Hazardous weather outlook, Jul 21, 7:04 PM CDT, 1 hour 3 minutes before

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In the hours before

Local storm report, Jul 21, 7:22 PM CDT, 45 minutes before

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Local storm report, Jul 21, 7:26 PM CDT, 41 minutes before

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Local storm report, Jul 21, 7:28 PM CDT, 39 minutes before

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Local storm report, Jul 21, 7:30 PM CDT, 37 minutes before

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Local storm report, Jul 21, 7:39 PM CDT, 28 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
739 PM CDT SUN JUL 21 2013

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0456 PM     HAIL             HALLIDAY                47.35N 102.34W
07/21/2013  M2.00 INCH       DUNN               ND   PUBLIC

            SOME CROP DAMAGE

&&

KSIMOSKO

Local storm report, Jul 21, 7:41 PM CDT, 26 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
741 PM CDT SUN JUL 21 2013

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0457 PM     HAIL             1 W HALLIDAY            47.35N 102.36W
07/21/2013  M2.50 INCH       DUNN               ND   PUBLIC

            A LOT OF DAMAGE

&&

KSIMOSKO

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 21, 7:08 PM CDT	Severe Thunderstorm Warning	BIS	Emmons, Sioux	67 min
Jul 21, 7:17 PM CDT	Areal Flood Advisory	BIS	Burleigh, Morton	6 hr
Jul 21, 7:19 PM CDT	Severe Thunderstorm Warning	BIS	Emmons, Morton, Sioux	56 min
Jul 21, 7:23 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Emmons, Morton	67 min
Jul 21, 10:53 PM CDT	Tornado Warning	BIS	Logan	37 min
Jul 21, 11:17 PM CDT	Severe Thunderstorm Warning	BIS	LaMoure	58 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.