Alert archive / Iowa / Mesoscale Discussions in 2013

Mesoscale Discussion 63

January 28, 201326 counties in Illinois; 28 counties in Iowa; 5 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Jan 28, 2013, 9:59 PM CST for 26 counties in Illinois; 28 counties in Iowa; 5 counties in Wisconsin. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jan 28, 2013, 9:59 PM CST (03:59 UTC)
Expired: Jan 29, 2013, 12:00 AM CST
In force: 2 hr
Issued by: the Storm Prediction Center
Chance of a watch: 5%

All 59 counties

Benton County, IA, Black Hawk County, IA, Boone County, IA, Bremer County, IA, Buchanan County, IA, Butler County, IA, Cedar County, IA, Clayton County, IA, Clinton County, IA, Delaware County, IA, Dubuque County, IA, Fayette County, IA, Franklin County, IA, Grundy County, IA, Hamilton County, IA, Hardin County, IA, Iowa County, IA, Jackson County, IA, Jasper County, IA, Johnson County, IA, Jones County, IA, Linn County, IA, Marshall County, IA, Muscatine County, IA, Poweshiek County, IA, Scott County, IA, Story County, IA, Tama County, IA, Boone County, IL, Bureau County, IL, Carroll County, IL, Cook County, IL, DeKalb County, IL, DuPage County, IL, Grundy County, IL, Henry County, IL, Jo Daviess County, IL, Kane County, IL, Kendall County, IL, Lake County, IL, LaSalle County, IL, Lee County, IL, Livingston County, IL, Marshall County, IL, McHenry County, IL, Mercer County, IL, Ogle County, IL, Putnam County, IL, Rock Island County, IL, Stark County, IL, Stephenson County, IL, Whiteside County, IL, Will County, IL, Winnebago County, IL, Grant County, WI, Green County, WI, Lafayette County, WI, Rock County, WI, Walworth County, WI

The radar

The Quad Cities radar (KDVN), 36 km from the middle of the area, began a volume at 03:59 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 00:00Z, 4.0 hours before the alert went out and 41 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: 483 m above ground
0-6 km bulk shear: 59 kt
0-1 km storm-relative helicity: 263 m²/s²
0-3 km storm-relative helicity: 328 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, 11:54 AM CST	Mesoscale Discussion	SPC	Calhoun, Greene, Jersey, Macoupin, Madison, Monroe and 5 more	96 min
Jan 29, 12:35 PM CST	Tornado Watch	SPC	Adams, Brown, Calhoun, Greene, Jersey, Macoupin and 5 more	7 hr
Jan 29, 3:31 PM CST	Mesoscale Discussion	SPC	Calhoun, Greene, Jersey, Monroe	89 min
Jan 28, 10:49 PM CST	Mesoscale Discussion	SPC	Brown, Langlade, Lincoln, Marathon, Menominee, Outagamie and 8 more	4 hr

Nearby

Mesoscale Discussions in Iowa, 2013 Mesoscale Discussions in Illinois, 2013 Mesoscale Discussions in Wisconsin, 2013 Every mesoscale discussion in 2013

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.