Alert archive / South Dakota / Mesoscale Discussions in 2005

Mesoscale Discussion 2262

September 24, 20056 counties in Nebraska; 16 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Sep 24, 2005, 1:03 AM CDT for 6 counties in Nebraska; 16 counties in South Dakota. It was in force for 57 min.

The area

The outline as issued.

The facts

Issued: Sep 24, 2005, 1:03 AM CDT (06:03 UTC)
Expired: Sep 24, 2005, 2:00 AM CDT
In force: 57 min
Issued by: the Storm Prediction Center

All 22 counties

Boyd County, NE, Cedar County, NE, Dakota County, NE, Dixon County, NE, Knox County, NE, Wayne County, NE, Aurora County, SD, Bon Homme County, SD, Brule County, SD, Buffalo County, SD, Charles Mix County, SD, Clay County, SD, Davison County, SD, Douglas County, SD, Gregory County, SD, Hanson County, SD, Hutchinson County, SD, Lyman County, SD, Tripp County, SD, Turner County, SD, Union County, SD, Yankton County, SD

The radar

The Sioux Falls radar (KFSD), 157 km from the middle of the area, began a volume at 06:09 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

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 6.1 hours before the alert went out and 287 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: 251 J/kg
Mixed-layer CIN: -78 J/kg
Mixed-layer LCL: 1275 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 84 m²/s²
0-3 km storm-relative helicity: 191 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

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
Sep 24, 3:26 PM CDT	Mesoscale Discussion	SPC	Antelope, Boone, Burt, Butler, Cedar, Colfax and 25 more	94 min
Sep 24, 3:55 PM CDT	Tornado Watch	SPC	Antelope, Boone, Boyd, Buffalo, Burt, Butler and 30 more	7 hr
Sep 24, 5:57 PM CDT	Mesoscale Discussion	SPC	Dawson, Dundy, Frontier, Furnas, Gosper, Hayes and 3 more	93 min
Sep 24, 7:14 AM CDT	Mesoscale Discussion	SPC	Clay, Lincoln, Union	2 hr

Nearby

Mesoscale Discussions in South Dakota, 2005 Mesoscale Discussions in Nebraska, 2005 Every mesoscale discussion in 2005

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.