Alert archive / Nebraska / Mesoscale Discussions in 2007

Mesoscale Discussion 2172

December 1, 20076 states

The Storm Prediction Center issued this mesoscale discussion at Dec 1, 2007, 6:48 AM CST for 6 states. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued
Dec 1, 2007, 6:48 AM CST (12:48 UTC)
Expired
Dec 1, 2007, 9:45 AM CST
In force
3 hr
Issued by
the Storm Prediction Center
All 144 counties

Adair County, IA, Adams County, IA, Appanoose County, IA, Audubon County, IA, Boone County, IA, Calhoun County, IA, Carroll County, IA, Cass County, IA, Cherokee County, IA, Clarke County, IA, Crawford County, IA, Dallas County, IA, Davis County, IA, Decatur County, IA, Des Moines County, IA, Fremont County, IA, Greene County, IA, Guthrie County, IA, Harrison County, IA, Henry County, IA, Ida County, IA, Jasper County, IA, Jefferson County, IA, Keokuk County, IA, Lee County, IA, Lucas County, IA, Madison County, IA, Mahaska County, IA, Marion County, IA, Mills County, IA, Monona County, IA, Monroe County, IA, Montgomery County, IA, Page County, IA, Plymouth County, IA, Polk County, IA, Pottawattamie County, IA, Ringgold County, IA, Sac County, IA, Shelby County, IA, Taylor County, IA, Union County, IA, Van Buren County, IA, Wapello County, IA, Warren County, IA, Wayne County, IA, Woodbury County, IA, Adams County, IL, Brown County, IL, Cass County, IL, Fulton County, IL, Hancock County, IL, Henderson County, IL, McDonough County, IL, Morgan County, IL, Schuyler County, IL, Brown County, KS, Doniphan County, KS, Jewell County, KS, Marshall County, KS, Nemaha County, KS, Republic County, KS, Washington County, KS, Adair County, MO, Andrew County, MO, Atchison County, MO, Buchanan County, MO, Caldwell County, MO, Clark County, MO, Clinton County, MO, Daviess County, MO, DeKalb County, MO, Gentry County, MO, Grundy County, MO, Harrison County, MO, Holt County, MO, Knox County, MO, Lewis County, MO, Linn County, MO, Livingston County, MO, Macon County, MO, Marion County, MO, Mercer County, MO, Nodaway County, MO, Putnam County, MO, Schuyler County, MO, Scotland County, MO, Shelby County, MO, Sullivan County, MO, Worth County, MO, Adams County, NE, Antelope County, NE, Boone County, NE, Buffalo County, NE, Burt County, NE, Butler County, NE, Cass County, NE, Cedar County, NE, Clay County, NE, Colfax County, NE, Cuming County, NE, Dakota County, NE, Dixon County, NE, Dodge County, NE, Douglas County, NE, Fillmore County, NE, Franklin County, NE, Gage County, NE, Garfield County, NE, Greeley County, NE, Hall County, NE, Hamilton County, NE, Howard County, NE, Jefferson County, NE, Johnson County, NE, Kearney County, NE, Knox County, NE, Lancaster County, NE, Madison County, NE, Merrick County, NE, Nance County, NE, Nemaha County, NE, Nuckolls County, NE, Otoe County, NE, Pawnee County, NE, Pierce County, NE, Platte County, NE, Polk County, NE, Richardson County, NE, Saline County, NE, Sarpy County, NE, Saunders County, NE, Seward County, NE, Sherman County, NE, Stanton County, NE, Thayer County, NE, Thurston County, NE, Valley County, NE, Washington County, NE, Wayne County, NE, Webster County, NE, Wheeler County, NE, York County, NE, Union County, SD

The radar

The Omaha radar (KOAX), 111 km from the middle of the area, began a volume at 12:54 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

Davenport, (KDVN), launched 12:00Z, 0.8 hours before the alert went out and 399 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-pSkew-T log-p diagram, Davenport, at 12:00Z on 2007-12-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Davenport, at 12:00Z on 2007-12-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 186 square meters per square second.1939587897117136Sfc1 km3 km6 km9 kmRMLM
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
2848 m above ground
0-6 km bulk shear
79 kt
0-1 km storm-relative helicity
186 m²/s²
0-3 km storm-relative helicity
419 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.

IssuedProductOfficeCountiesLasted
Dec 1, 7:04 AM CSTMesoscale DiscussionSPCCarroll, Henry, Jo Daviess, Knox, Mercer, Peoria and 3 more4 hr
Dec 1, 12:01 PM CSTMesoscale DiscussionSPCBoone, Bureau, Carroll, Cook, DeKalb, DuPage and 33 more6 hr
Dec 1, 12:05 AM CSTMesoscale DiscussionSPCAdams, Fremont, Mills, Montgomery, Page, Ringgold and 1 more4 hr
Dec 1, 12:29 AM CSTMesoscale DiscussionSPCMonona, Plymouth, Woodbury4 hr
Dec 1, 4:25 AM CSTMesoscale DiscussionSPCEllis, Gove, Graham, Lane, Logan, Ness and 3 more3 hr
Dec 1, 12:17 PM CSTMesoscale DiscussionSPCCodington, Day, Grant, Marshall, Roberts6 hr

Nearby

Mesoscale Discussions in Nebraska, 2007Mesoscale Discussions in Iowa, 2007Mesoscale Discussions in Missouri, 2007Every mesoscale discussion in 2007

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.