Alert archive / Illinois / Mesoscale Discussions in 2017

Mesoscale Discussion 1752

November 5, 201725 counties in Illinois; 21 counties in Indiana

The Storm Prediction Center issued this mesoscale discussion at Nov 5, 2017, 6:04 AM CST for 25 counties in Illinois; 21 counties in Indiana. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Nov 5, 2017, 6:04 AM CST (12:04 UTC)
Expired: Nov 5, 2017, 8:30 AM CST
In force: 2 hr
Issued by: the Storm Prediction Center
Chance of a watch: 20%

All 46 counties

Bond County, IL, Champaign County, IL, Christian County, IL, Clark County, IL, Coles County, IL, Cumberland County, IL, DeWitt County, IL, Douglas County, IL, Edgar County, IL, Effingham County, IL, Fayette County, IL, Ford County, IL, Iroquois County, IL, Jasper County, IL, Logan County, IL, Macon County, IL, Macoupin County, IL, McLean County, IL, Menard County, IL, Montgomery County, IL, Moultrie County, IL, Piatt County, IL, Sangamon County, IL, Shelby County, IL, Vermilion County, IL, Benton County, IN, Boone County, IN, Carroll County, IN, Cass County, IN, Clay County, IN, Clinton County, IN, Fountain County, IN, Hamilton County, IN, Hendricks County, IN, Howard County, IN, Marion County, IN, Miami County, IN, Montgomery County, IN, Parke County, IN, Putnam County, IN, Tippecanoe County, IN, Tipton County, IN, Vermillion County, IN, Vigo County, IN, Warren County, IN, White County, IN

The radar

The Lincoln radar (KILX), 89 km from the middle of the area, began a volume at 12:04 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, 0.1 hours before the alert went out and 33 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: 1199 J/kg
Mixed-layer CIN: -20 J/kg
Mixed-layer LCL: 454 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 322 m²/s²
0-3 km storm-relative helicity: 382 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 9.2

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
Nov 5, 11:09 AM CST	Mesoscale Discussion	SPC	Bond, Champaign, Christian, Clark, Clay, Clinton and 30 more	66 min
Nov 5, 12:35 PM CST	Tornado Watch	SPC	Bond, Champaign, Christian, Clark, Clay, Clinton and 24 more	6 hr
Nov 5, 2:51 PM CST	Mesoscale Discussion	SPC	Alexander, Bond, Christian, Clark, Clay, Clinton and 38 more	114 min
Nov 5, 3:50 PM CST	Tornado Watch	SPC	Alexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 13 more	6 hr
Nov 5, 10:48 AM CST	Mesoscale Discussion	SPC	Bartholomew, Brown, Daviess, Dearborn, Decatur, Greene and 8 more	57 min
Nov 5, 11:08 AM CST	Tornado Watch	SPC	Adams, Bartholomew, Blackford, Boone, Brown, Carroll and 44 more	7 hr
Nov 5, 12:36 PM CST	Mesoscale Discussion	SPC	Boone, Carroll, Clinton, Grant, Hamilton, Howard and 4 more	54 min
Nov 5, 4:58 PM CST	Mesoscale Discussion	SPC	Bartholomew, Brown, Clark, Clay, Crawford, Dearborn and 28 more	62 min
Nov 5, 5:31 PM CST	Severe Thunderstorm Watch	SPC	Bartholomew, Brown, Clark, Crawford, Daviess, Dearborn and 20 more	6 hr

Nearby

Mesoscale Discussions in Illinois, 2017 Mesoscale Discussions in Indiana, 2017 Every mesoscale discussion in 2017

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.