Alert archive / Iowa / Mesoscale Discussions in 2005

Mesoscale Discussion 2403

November 12, 20056 states

The Storm Prediction Center issued this mesoscale discussion at Nov 12, 2005, 12:33 PM CST for 6 states. It was in force for 87 min.

The area

The outline as issued.

The facts

Issued: Nov 12, 2005, 12:33 PM CST (18:33 UTC)
Expired: Nov 12, 2005, 2:00 PM CST
In force: 87 min
Issued by: the Storm Prediction Center

All 95 counties

Adams County, IA, Audubon County, IA, Buena Vista County, IA, Carroll County, IA, Cass County, IA, Cherokee County, IA, Crawford County, IA, Fremont County, IA, Harrison County, IA, Ida County, IA, Lyon County, IA, Mills County, IA, Monona County, IA, Montgomery County, IA, O'Brien County, IA, Osceola County, IA, Page County, IA, Plymouth County, IA, Pottawattamie County, IA, Sac County, IA, Shelby County, IA, Sioux County, IA, Taylor County, IA, Woodbury County, IA, Allen County, KS, Anderson County, KS, Atchison County, KS, Bourbon County, KS, Brown County, KS, Coffey County, KS, Doniphan County, KS, Douglas County, KS, Franklin County, KS, Jackson County, KS, Jefferson County, KS, Johnson County, KS, Leavenworth County, KS, Linn County, KS, Miami County, KS, Nemaha County, KS, Neosho County, KS, Osage County, KS, Shawnee County, KS, Wilson County, KS, Woodson County, KS, Wyandotte County, KS, Nobles County, MN, Pipestone County, MN, Rock County, MN, Andrew County, MO, Atchison County, MO, Bates County, MO, Buchanan County, MO, Cass County, MO, Clay County, MO, Clinton County, MO, DeKalb County, MO, Gentry County, MO, Holt County, MO, Jackson County, MO, Nodaway County, MO, Platte County, MO, Worth County, MO, Burt County, NE, Cass County, NE, Cedar County, NE, Cuming County, NE, Dakota County, NE, Dixon County, NE, Dodge County, NE, Douglas County, NE, Johnson County, NE, Nemaha County, NE, Otoe County, NE, Pawnee County, NE, Richardson County, NE, Sarpy County, NE, Saunders County, NE, Stanton County, NE, Thurston County, NE, Washington County, NE, Wayne County, NE, Bon Homme County, SD, Clay County, SD, Hanson County, SD, Hutchinson County, SD, Lake County, SD, Lincoln County, SD, McCook County, SD, Miner County, SD, Minnehaha County, SD, Moody County, SD, Turner County, SD, Union County, SD, Yankton County, SD

The radar

The Omaha radar (KOAX), 54 km from the middle of the area, began a volume at 18:36 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.

Tornado Watch 858Nov 12, 1:45 PM CST

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 6.6 hours before the alert went out and 54 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: 1049 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 155 m²/s²
0-3 km storm-relative helicity: 136 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
Nov 12, 1:44 PM CST	Tornado Watch	SPC	Adair, Adams, Appanoose, Audubon, Boone, Buena Vista and 62 more	6 hr
Nov 12, 3:35 PM CST	Mesoscale Discussion	SPC	Adair, Boone, Buena Vista, Calhoun, Carroll, Cherokee and 18 more	85 min
Nov 12, 4:40 PM CST	Mesoscale Discussion	SPC	Adair, Appanoose, Audubon, Boone, Buena Vista, Butler and 49 more	65 min
Nov 12, 5:24 PM CST	Mesoscale Discussion	SPC	Allamakee, Benton, Bremer, Buchanan, Cedar, Chickasaw and 18 more	66 min
Nov 12, 5:40 PM CST	Tornado Watch	SPC	Allamakee, Benton, Black Hawk, Bremer, Buchanan, Cedar and 14 more	4 hr
Nov 12, 5:49 PM CST	Tornado Watch	SPC	Cherokee, Crawford	7 hr
Nov 12, 1:54 PM CST	Mesoscale Discussion	SPC	McDonald, Newton	3 hr
Nov 12, 4:04 PM CST	Mesoscale Discussion	SPC	McDonald	2 hr

Nearby

Mesoscale Discussions in Iowa, 2005 Mesoscale Discussions in Kansas, 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.