Alert archive / Iowa / Mesoscale Discussions in 2007

Mesoscale Discussion 195

February 24, 20074 states

The Storm Prediction Center issued this mesoscale discussion at Feb 24, 2007, 12:19 PM CST for 4 states. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued: Feb 24, 2007, 12:19 PM CST (18:19 UTC)
Expired: Feb 24, 2007, 5:15 PM CST
In force: 5 hr
Issued by: the Storm Prediction Center

All 83 counties

Allamakee County, IA, Benton County, IA, Black Hawk County, IA, Boone County, IA, Bremer County, IA, Buchanan County, IA, Butler County, IA, Cedar County, IA, Cerro Gordo County, IA, Chickasaw County, IA, Clayton County, IA, Clinton County, IA, Delaware County, IA, Des Moines County, IA, Dubuque County, IA, Fayette County, IA, Floyd County, IA, Franklin County, IA, Grundy County, IA, Hamilton County, IA, Hancock County, IA, Hardin County, IA, Henry County, IA, Howard County, IA, Iowa County, IA, Jackson County, IA, Jasper County, IA, Jefferson County, IA, Johnson County, IA, Jones County, IA, Keokuk County, IA, Linn County, IA, Louisa County, IA, Mahaska County, IA, Marion County, IA, Marshall County, IA, Mitchell County, IA, Muscatine County, IA, Polk County, IA, Poweshiek County, IA, Scott County, IA, Story County, IA, Tama County, IA, Wapello County, IA, Washington County, IA, Winneshiek County, IA, Worth County, IA, Wright County, IA, Boone County, IL, Bureau County, IL, Carroll County, IL, DeKalb County, IL, Grundy County, IL, Henderson County, IL, Henry County, IL, Jo Daviess County, IL, Kane County, IL, Kendall County, IL, Knox County, IL, LaSalle County, IL, Lee County, IL, Livingston County, IL, Marshall County, IL, Mercer County, IL, Ogle County, IL, Peoria County, IL, Putnam County, IL, Rock Island County, IL, Stark County, IL, Stephenson County, IL, Warren County, IL, Whiteside County, IL, Winnebago County, IL, Woodford County, IL, Dodge County, MN, Fillmore County, MN, Freeborn County, MN, Houston County, MN, Mower County, MN, Olmsted County, MN, Crawford County, WI, Grant County, WI, Lafayette County, WI

The radar

The Quad Cities radar (KDVN), 112 km from the middle of the area, began a volume at 18:18 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, 6.3 hours before the alert went out and 116 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: 1873 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 570 m²/s²
0-3 km storm-relative helicity: 654 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
Feb 23, 7:59 PM CST	Mesoscale Discussion	SPC	Allamakee, Chickasaw, Clayton, Fayette, Howard, Winneshiek	5 hr
Feb 24, 12:08 AM CST	Mesoscale Discussion	SPC	Allamakee	4 hr
Feb 24, 7:25 AM CST	Mesoscale Discussion	SPC	Benton, Black Hawk, Bremer, Buchanan, Butler, Cedar and 39 more	4 hr
Feb 24, 1:34 PM CST	Mesoscale Discussion	SPC	Cherokee, Clay, Dickinson, Emmet, Lyon, O'Brien and 3 more	5 hr

Nearby

Mesoscale Discussions in Iowa, 2007 Mesoscale Discussions in Illinois, 2007 Mesoscale Discussions in Minnesota, 2007 Every 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.