Alert archive / Illinois / Mesoscale Discussions in 2014

Mesoscale Discussion 1121

June 22, 201428 counties in Illinois; Des Moines County, Lee County, Iowa; 8 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Jun 22, 2014, 5:58 PM CDT for 28 counties in Illinois; Des Moines County, Lee County, Iowa; 8 counties in Missouri. It was in force for 92 min.

The area

The outline as issued.

The facts

Issued: Jun 22, 2014, 5:58 PM CDT (22:58 UTC)
Expired: Jun 22, 2014, 7:30 PM CDT
In force: 92 min
Issued by: the Storm Prediction Center

All 38 counties

Des Moines County, IA, Lee County, IA, Adams County, IL, Brown County, IL, Bureau County, IL, Cass County, IL, Fulton County, IL, Hancock County, IL, Henderson County, IL, Henry County, IL, Knox County, IL, Lee County, IL, Logan County, IL, Marshall County, IL, Mason County, IL, McDonough County, IL, Menard County, IL, Mercer County, IL, Morgan County, IL, Peoria County, IL, Pike County, IL, Putnam County, IL, Rock Island County, IL, Sangamon County, IL, Schuyler County, IL, Scott County, IL, Stark County, IL, Tazewell County, IL, Warren County, IL, Woodford County, IL, Clark County, MO, Knox County, MO, Lewis County, MO, Marion County, MO, Monroe County, MO, Ralls County, MO, Randolph County, MO, Shelby County, MO

The radar

The Lincoln radar (KILX), 115 km from the middle of the area, began a volume at 22:57 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, 11.0 hours before the alert went out and 133 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: 210 J/kg
Mixed-layer CIN: -154 J/kg
Mixed-layer LCL: 1176 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: 13 m²/s²
0-3 km storm-relative helicity: 48 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
Jun 22, 11:19 AM CDT	Mesoscale Discussion	SPC	Hancock, Henderson, Jo Daviess, Mercer, Rock Island, Warren	101 min
Jun 22, 11:54 AM CDT	Severe Thunderstorm Watch	SPC	Carroll, Hancock, Henderson, Henry, Jo Daviess, McDonough and 4 more	7 hr
Jun 22, 2:30 PM CDT	Mesoscale Discussion	SPC	Carroll, Hancock, Henderson, Henry, Jo Daviess, Knox and 5 more	60 min
Jun 21, 8:34 PM CDT	Severe Thunderstorm Watch	SPC	Cherokee, Ida, Lyon, O'Brien, Osceola, Plymouth and 2 more	6 hr
Jun 21, 11:57 PM CDT	Mesoscale Discussion	SPC	Buena Vista, Cherokee, Clay, Dickinson, Emmet, Kossuth and 7 more	93 min
Jun 22, 12:24 PM CDT	Mesoscale Discussion	SPC	Decatur, Ringgold, Wayne	66 min

Nearby

Mesoscale Discussions in Illinois, 2014 Mesoscale Discussions in Missouri, 2014 Mesoscale Discussions in Iowa, 2014 Every mesoscale discussion in 2014

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.