Alert archive / North Dakota / Mesoscale Discussions in 2016

Mesoscale Discussion 1909

December 25, 201631 counties in North Dakota; 8 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Dec 25, 2016, 5:33 PM MST for 31 counties in North Dakota; 8 counties in South Dakota. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued: Dec 25, 2016, 5:33 PM MST (00:33 UTC)
Expired: Dec 25, 2016, 11:30 PM MST
In force: 6 hr
Issued by: the Storm Prediction Center

All 39 counties

Adams County, ND, Benson County, ND, Billings County, ND, Bottineau County, ND, Bowman County, ND, Burleigh County, ND, Cavalier County, ND, Dunn County, ND, Eddy County, ND, Grant County, ND, Hettinger County, ND, McHenry County, ND, McKenzie County, ND, McLean County, ND, Mercer County, ND, Morton County, ND, Mountrail County, ND, Oliver County, ND, Pembina County, ND, Pierce County, ND, Ramsey County, ND, Renville County, ND, Rolette County, ND, Sheridan County, ND, Sioux County, ND, Slope County, ND, Stark County, ND, Towner County, ND, Walsh County, ND, Ward County, ND, Wells County, ND, Butte County, SD, Corson County, SD, Harding County, SD, Lawrence County, SD, Meade County, SD, Pennington County, SD, Perkins County, SD, Ziebach County, SD

The radar

The Bismarck radar (KBIS), 42 km from the middle of the area, began a volume at 00:35 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

Rapid City, SD (KRAP), launched 00:00Z, 0.6 hours before the alert went out and 362 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 795 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 337 m²/s²
0-3 km storm-relative helicity: 536 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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Nearby

Mesoscale Discussions in North Dakota, 2016 Mesoscale Discussions in South Dakota, 2016 Every mesoscale discussion in 2016

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.