Alert archive / North Dakota / Mesoscale Discussions in 2011

Mesoscale Discussion 245

March 22, 201113 counties in North Dakota

The Storm Prediction Center issued this mesoscale discussion at Mar 22, 2011, 11:05 AM MDT for 13 counties in North Dakota. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued: Mar 22, 2011, 11:05 AM MDT (17:05 UTC)
Expired: Mar 22, 2011, 3:45 PM MDT
In force: 5 hr
Issued by: the Storm Prediction Center
Concerning: Winter mixed precipitation

Counties Adams County, ND, Billings County, ND, Bowman County, ND, Burleigh County, ND, Foster County, ND, Hettinger County, ND, Kidder County, ND, Mercer County, ND, Morton County, ND, Oliver County, ND, Slope County, ND, Stark County, ND, Stutsman County, ND

The radar

The Bismarck radar (KBIS), 12 km from the middle of the area, began a volume at 17:07 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 nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 5.1 hours before the alert went out and 16 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: 4 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 484 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 242 m²/s²
0-3 km storm-relative helicity: 201 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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
Mar 22, 9:39 AM MDT	Mesoscale Discussion	SPC	Benson, Bottineau, Eddy, Foster, Grand Forks, Griggs and 14 more	6 hr
Mar 22, 1:25 PM MDT	Mesoscale Discussion	SPC	Dickey, Emmons, LaMoure, Logan, McIntosh, Ransom and 3 more	4 hr

Nearby

Mesoscale Discussions in North 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.