Alert archive / Iowa / Mesoscale Discussions in 2004

Mesoscale Discussion 2350

October 22, 20044 states

The Storm Prediction Center issued this mesoscale discussion at Oct 22, 2004, 12:11 PM CDT for 4 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Oct 22, 2004, 12:11 PM CDT (17:11 UTC)
Expired: Oct 22, 2004, 2:15 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

All 81 counties

Allamakee County, IA, Appanoose County, IA, Benton County, IA, Black Hawk County, IA, Bremer County, IA, Buchanan County, IA, Cedar County, IA, Clarke County, IA, Clayton County, IA, Clinton County, IA, Davis County, IA, Decatur County, IA, Delaware County, IA, Des Moines County, IA, Dubuque County, IA, Fayette County, IA, Grundy County, IA, Henry County, IA, Iowa County, IA, Jackson County, IA, Jasper County, IA, Jefferson County, IA, Johnson County, IA, Jones County, IA, Keokuk County, IA, Lee County, IA, Linn County, IA, Louisa County, IA, Lucas County, IA, Madison County, IA, Mahaska County, IA, Marion County, IA, Marshall County, IA, Monroe County, IA, Muscatine County, IA, Polk County, IA, Poweshiek County, IA, Ringgold County, IA, Scott County, IA, Story County, IA, Tama County, IA, Taylor County, IA, Union County, IA, Van Buren County, IA, Wapello County, IA, Warren County, IA, Washington County, IA, Wayne County, IA, Carroll County, IL, Hancock County, IL, Henderson County, IL, Henry County, IL, Jo Daviess County, IL, Knox County, IL, McDonough County, IL, Mercer County, IL, Rock Island County, IL, Stark County, IL, Warren County, IL, Whiteside County, IL, Adair County, MO, Clark County, MO, Daviess County, MO, Gentry County, MO, Grundy County, MO, Harrison County, MO, Knox County, MO, Lewis County, MO, Linn County, MO, Livingston County, MO, Macon County, MO, Mercer County, MO, Putnam County, MO, Schuyler County, MO, Scotland County, MO, Sullivan County, MO, Worth County, MO, Crawford County, WI, Grant County, WI, Iowa County, WI, Lafayette County, WI

The radar

The Quad Cities radar (KDVN), 130 km from the middle of the area, began a volume at 17:10 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, 5.2 hours before the alert went out and 137 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: 6 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 443 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 237 m²/s²
0-3 km storm-relative helicity: 254 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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
Oct 22, 10:29 AM CDT	Mesoscale Discussion	SPC	Crawford, Fremont, Harrison, Mills, Monona, Pottawattamie and 1 more	2 hr
Oct 22, 4:26 PM CDT	Mesoscale Discussion	SPC	Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 6 more	3 hr
Oct 22, 1:08 PM CDT	Mesoscale Discussion	SPC	Jasper, Newton	2 hr

Nearby

Mesoscale Discussions in Iowa, 2004 Mesoscale Discussions in Missouri, 2004 Mesoscale Discussions in Illinois, 2004 Every mesoscale discussion in 2004

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.