Alert archive / Nebraska / Mesoscale Discussions in 2008

Mesoscale Discussion 2005

August 2, 20085 counties in Iowa; 29 counties in Nebraska; 11 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Aug 2, 2008, 10:13 PM CDT for 5 counties in Iowa; 29 counties in Nebraska; 11 counties in South Dakota. It was in force for 62 min.

The area

The outline as issued.

The facts

Issued: Aug 2, 2008, 10:13 PM CDT (03:13 UTC)
Expired: Aug 2, 2008, 11:15 PM CDT
In force: 62 min
Issued by: the Storm Prediction Center

All 45 counties

Harrison County, IA, Monona County, IA, Plymouth County, IA, Sioux County, IA, Woodbury County, IA, Antelope County, NE, Blaine County, NE, Boone County, NE, Boyd County, NE, Brown County, NE, Burt County, NE, Cedar County, NE, Colfax County, NE, Cuming County, NE, Dakota County, NE, Dixon County, NE, Dodge County, NE, Garfield County, NE, Greeley County, NE, Holt County, NE, Keya Paha County, NE, Knox County, NE, Loup County, NE, Madison County, NE, Nance County, NE, Pierce County, NE, Platte County, NE, Rock County, NE, Stanton County, NE, Thurston County, NE, Valley County, NE, Washington County, NE, Wayne County, NE, Wheeler County, NE, Bon Homme County, SD, Charles Mix County, SD, Clay County, SD, Douglas County, SD, Gregory County, SD, Hutchinson County, SD, Lincoln County, SD, Tripp County, SD, Turner County, SD, Union County, SD, Yankton County, SD

The radar

The Sioux Falls radar (KFSD), 163 km from the middle of the area, began a volume at 03:12 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.

Severe Thunderstorm Watch 799Aug 2, 11:15 PM CDT

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 3.2 hours before the alert went out and 259 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: 2 J/kg
Mixed-layer CIN: -173 J/kg
Mixed-layer LCL: 4860 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 30 m²/s²
0-3 km storm-relative helicity: 103 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
Aug 2, 11:13 PM CDT	Severe Thunderstorm Watch	SPC	Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 5 more	4 hr
Aug 2, 11:28 PM CDT	Mesoscale Discussion	SPC	Benton, Black Hawk, Bremer, Buchanan, Butler, Cerro Gordo and 20 more	92 min
Aug 3, 2:29 PM CDT	Mesoscale Discussion	SPC	Bremer, Cerro Gordo, Chickasaw, Clay, Dickinson, Emmet and 13 more	2 hr
Aug 3, 6:40 PM CDT	Mesoscale Discussion	SPC	Arthur, Blaine, Chase, Cherry, Cheyenne, Deuel and 12 more	2 hr
Aug 2, 9:28 PM CDT	Mesoscale Discussion	SPC	Harding	62 min
Aug 3, 12:05 AM CDT	Severe Thunderstorm Watch	SPC	Butte, Campbell, Corson, Dewey, Edmunds, Harding and 4 more	8 hr
Aug 3, 4:10 AM CDT	Mesoscale Discussion	SPC	Brown, Campbell, Corson, Day, Edmunds, McPherson and 1 more	95 min

Nearby

Mesoscale Discussions in Nebraska, 2008 Mesoscale Discussions in South Dakota, 2008 Mesoscale Discussions in Iowa, 2008 Every mesoscale discussion in 2008

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.