Alert archive / North Dakota / Mesoscale Discussions in 2011

Mesoscale Discussion 1559

July 10, 201129 counties in North Dakota; Campbell County, Corson County, McPherson County, South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jul 10, 2011, 2:08 PM CDT for 29 counties in North Dakota; Campbell County, Corson County, McPherson County, South Dakota. It was in force for 97 min.

The area

The outline as issued.

The facts

Issued: Jul 10, 2011, 2:08 PM CDT (19:08 UTC)
Expired: Jul 10, 2011, 3:45 PM CDT
In force: 97 min
Issued by: the Storm Prediction Center

All 32 counties

Barnes County, ND, Benson County, ND, Burleigh County, ND, Cavalier County, ND, Dickey County, ND, Eddy County, ND, Emmons County, ND, Foster County, ND, Grand Forks County, ND, Grant County, ND, Griggs County, ND, Kidder County, ND, LaMoure County, ND, Logan County, ND, McIntosh County, ND, McLean County, ND, Mercer County, ND, Morton County, ND, Nelson County, ND, Oliver County, ND, Ramsey County, ND, Sheridan County, ND, Sioux County, ND, Steele County, ND, Stutsman County, ND, Towner County, ND, Traill County, ND, Walsh County, ND, Wells County, ND, Campbell County, SD, Corson County, SD, McPherson County, SD

The radar

The Bismarck radar (KBIS), 127 km from the middle of the area, began a volume at 19:10 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

Tornado Watch 617Jul 10, 2:30 PM CDT

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 7.1 hours before the alert went out and 123 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: 168 J/kg
Mixed-layer CIN: -388 J/kg
Mixed-layer LCL: 1832 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 82 m²/s²
0-3 km storm-relative helicity: 99 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 10, 10:32 AM CDT	Mesoscale Discussion	SPC	Barnes, Burleigh, Dickey, Emmons, Grant, Kidder and 10 more	118 min
Jul 10, 11:08 AM CDT	Severe Thunderstorm Watch	SPC	Adams, Barnes, Benson, Burleigh, Cavalier, Dickey and 27 more	8 hr
Jul 10, 2:29 PM CDT	Tornado Watch	SPC	Barnes, Cass, Dickey, Emmons, LaMoure, Logan and 4 more	7 hr
Jul 10, 5:25 PM CDT	Mesoscale Discussion	SPC	Cass, Dickey, LaMoure, Logan, McIntosh, Ransom and 2 more	95 min
Jul 10, 1:03 AM CDT	Mesoscale Discussion	SPC	Bon Homme, Brookings, Charles Mix, Clay, Hutchinson, Lake and 6 more	117 min
Jul 10, 6:12 PM CDT	Severe Thunderstorm Watch	SPC	Brookings, Moody	8 hr

Nearby

Mesoscale Discussions in North Dakota, 2011 Mesoscale Discussions in South Dakota, 2011 Every mesoscale discussion in 2011

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.