Alert archive / South Dakota / Mesoscale Discussions in 2006

Mesoscale Discussion 4

January 1, 20064 states

The Storm Prediction Center issued this mesoscale discussion at Jan 1, 2006, 6:38 PM CST for 4 states. It was in force for 4 hr.

The area

The outline as issued.

The facts

Issued: Jan 1, 2006, 6:38 PM CST (00:38 UTC)
Expired: Jan 1, 2006, 10:45 PM CST
In force: 4 hr
Issued by: the Storm Prediction Center

All 51 counties

Clay County, IA, Dickinson County, IA, Emmet County, IA, Kossuth County, IA, Lyon County, IA, O'Brien County, IA, Osceola County, IA, Palo Alto County, IA, Plymouth County, IA, Sioux County, IA, Winnebago County, IA, Faribault County, MN, Jackson County, MN, Martin County, MN, Nobles County, MN, Rock County, MN, Antelope County, NE, Boyd County, NE, Cedar County, NE, Dixon County, NE, Holt County, NE, Keya Paha County, NE, Knox County, NE, Pierce County, NE, Rock County, NE, Wayne County, NE, Wheeler County, NE, Aurora County, SD, Bon Homme County, SD, Brule County, SD, Charles Mix County, SD, Clay County, SD, Davison County, SD, Douglas County, SD, Gregory County, SD, Haakon County, SD, Hanson County, SD, Hughes County, SD, Hutchinson County, SD, Jones County, SD, Lincoln County, SD, Lyman County, SD, McCook County, SD, Mellette County, SD, Minnehaha County, SD, Stanley County, SD, Todd County, SD, Tripp County, SD, Turner County, SD, Union County, SD, Yankton County, SD

The radar

The Sioux Falls radar (KFSD), 84 km from the middle of the area, began a volume at 00:38 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

Omaha, NE (KOAX), launched 00:00Z, 0.6 hours before the alert went out and 255 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: 834 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 175 m²/s²
0-3 km storm-relative helicity: 225 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
Jan 2, 4:31 AM CST	Mesoscale Discussion	SPC	Davis, Des Moines, Henry, Jefferson, Lee, Van Buren and 1 more	59 min

Nearby

Mesoscale Discussions in South Dakota, 2006 Mesoscale Discussions in Iowa, 2006 Mesoscale Discussions in Nebraska, 2006 Every mesoscale discussion in 2006

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.