Alert archive / Illinois / Mesoscale Discussions in 2016

Mesoscale Discussion 218

March 15, 201617 counties in Illinois

The Storm Prediction Center issued this mesoscale discussion at Mar 15, 2016, 6:29 PM CDT for 17 counties in Illinois. It was in force for 91 min.

The area

The outline as issued.

The facts

Issued: Mar 15, 2016, 6:29 PM CDT (23:29 UTC)
Expired: Mar 15, 2016, 8:00 PM CDT
In force: 91 min
Issued by: the Storm Prediction Center

Counties Bureau County, IL, Cass County, IL, Fulton County, IL, Henry County, IL, Knox County, IL, Logan County, IL, Marshall County, IL, Mason County, IL, Menard County, IL, Morgan County, IL, Peoria County, IL, Putnam County, IL, Sangamon County, IL, Scott County, IL, Stark County, IL, Tazewell County, IL, Woodford County, IL

The radar

The Lincoln radar (KILX), 78 km from the middle of the area, began a volume at 23:32 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, 11.5 hours before the alert went out and 113 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: 2 J/kg
Mixed-layer CIN: -270 J/kg
Mixed-layer LCL: 736 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 119 m²/s²
0-3 km storm-relative helicity: 196 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.2

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 15, 2:24 PM CDT	Mesoscale Discussion	SPC	Adams, Brown, Bureau, Carroll, Cass, Christian and 37 more	66 min
Mar 15, 3:31 PM CDT	Tornado Watch	SPC	Adams, Brown, Bureau, Calhoun, Carroll, Cass and 40 more	7 hr
Mar 15, 5:32 PM CDT	Mesoscale Discussion	SPC	Bond, Clay, Clinton, Crawford, Cumberland, Edwards and 21 more	88 min

Nearby

Mesoscale Discussions in Illinois, 2016 Every mesoscale discussion in 2016

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.