Alert archive / Iowa / Mesoscale Discussions in 2008

Mesoscale Discussion 106

January 29, 20084 states

The Storm Prediction Center issued this mesoscale discussion at Jan 29, 2008, 12:19 PM CST for 4 states. It was in force for 4 hr.

The area

The outline as issued.

The facts

Issued: Jan 29, 2008, 12:19 PM CST (18:19 UTC)
Expired: Jan 29, 2008, 4:15 PM CST
In force: 4 hr
Issued by: the Storm Prediction Center

All 57 counties

Appanoose County, IA, Benton County, IA, Cedar County, IA, Clinton County, IA, Davis County, IA, Delaware County, IA, Des Moines County, IA, Dubuque County, IA, Henry County, IA, Iowa County, IA, Jackson County, IA, Jefferson County, IA, Johnson County, IA, Jones County, IA, Keokuk County, IA, Lee County, IA, Linn County, IA, Louisa County, IA, Mahaska County, IA, Monroe County, IA, Muscatine County, IA, Poweshiek County, IA, Scott County, IA, Van Buren County, IA, Wapello County, IA, Washington County, IA, Boone County, IL, Carroll County, IL, Henderson County, IL, Henry County, IL, Jo Daviess County, IL, Lee County, IL, McHenry County, IL, Mercer County, IL, Ogle County, IL, Rock Island County, IL, Stephenson County, IL, Warren County, IL, Whiteside County, IL, Winnebago County, IL, Clark County, MO, Columbia County, WI, Dane County, WI, Dodge County, WI, Fond du Lac County, WI, Grant County, WI, Green County, WI, Green Lake County, WI, Iowa County, WI, Jefferson County, WI, Lafayette County, WI, Richland County, WI, Rock County, WI, Sauk County, WI, Walworth County, WI, Washington County, WI, Waukesha County, WI

The radar

The Quad Cities radar (KDVN), 41 km from the middle of the area, began a volume at 18:22 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

Lincoln, IL (KILX), launched 12:00Z, 6.3 hours before the alert went out and 250 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: 553 m above ground
0-6 km bulk shear: 62 kt
0-1 km storm-relative helicity: 193 m²/s²
0-3 km storm-relative helicity: 206 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
Jan 29, 10:21 AM CST	Mesoscale Discussion	SPC	Alexander, Franklin, Gallatin, Hamilton, Hardin, Jackson and 8 more	54 min
Jan 29, 10:54 AM CST	Mesoscale Discussion	SPC	Alexander	66 min
Jan 29, 11:32 AM CST	Tornado Watch	SPC	Alexander, Bond, Calhoun, Clinton, Edwards, Fayette and 27 more	7 hr
Jan 29, 1:24 PM CST	Mesoscale Discussion	SPC	Champaign, Christian, Coles, DeWitt, Douglas, Edgar and 11 more	66 min
Jan 29, 3:56 PM CST	Mesoscale Discussion	SPC	Alexander, Clay, Clinton, Crawford, Cumberland, Edwards and 24 more	64 min
Jan 29, 7:39 AM CST	Mesoscale Discussion	SPC	Audubon, Buena Vista, Calhoun, Carroll, Cass, Cerro Gordo and 37 more	5 hr
Jan 29, 10:34 AM CST	Mesoscale Discussion	SPC	Adams, Ashland, Barron, Buffalo, Chippewa, Clark and 31 more	4 hr

Nearby

Mesoscale Discussions in Iowa, 2008 Mesoscale Discussions in Wisconsin, 2008 Mesoscale Discussions in Illinois, 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.