Alert archive / Illinois / Mesoscale Discussions in 2016

Mesoscale Discussion 305

March 31, 20164 states

The Storm Prediction Center issued this mesoscale discussion at Mar 31, 2016, 12:36 PM CDT for 4 states. It was in force for 84 min.

The area

The outline as issued.

The facts

Issued: Mar 31, 2016, 12:36 PM CDT (17:36 UTC)
Expired: Mar 31, 2016, 2:00 PM CDT
In force: 84 min
Issued by: the Storm Prediction Center
Chance of a watch: 40%

All 102 counties

Bond County, IL, Champaign County, IL, Christian County, IL, Clark County, IL, Clay County, IL, Clinton County, IL, Coles County, IL, Crawford County, IL, Cumberland County, IL, DeWitt County, IL, Douglas County, IL, Edgar County, IL, Edwards County, IL, Effingham County, IL, Fayette County, IL, Ford County, IL, Franklin County, IL, Gallatin County, IL, Hamilton County, IL, Iroquois County, IL, Jackson County, IL, Jasper County, IL, Jefferson County, IL, Johnson County, IL, Kankakee County, IL, Lawrence County, IL, Livingston County, IL, Logan County, IL, Macon County, IL, Macoupin County, IL, Madison County, IL, Marion County, IL, McLean County, IL, Monroe County, IL, Montgomery County, IL, Moultrie County, IL, Perry County, IL, Piatt County, IL, Pope County, IL, Randolph County, IL, Richland County, IL, Saint Clair County, IL, Saline County, IL, Sangamon County, IL, Shelby County, IL, Union County, IL, Vermilion County, IL, Wabash County, IL, Washington County, IL, Wayne County, IL, White County, IL, Williamson County, IL, Benton County, IN, Boone County, IN, Carroll County, IN, Cass County, IN, Clay County, IN, Clinton County, IN, Daviess County, IN, Dubois County, IN, Elkhart County, IN, Fountain County, IN, Fulton County, IN, Gibson County, IN, Greene County, IN, Hendricks County, IN, Howard County, IN, Jasper County, IN, Knox County, IN, Lake County, IN, LaPorte County, IN, Lawrence County, IN, Marion County, IN, Marshall County, IN, Martin County, IN, Miami County, IN, Monroe County, IN, Montgomery County, IN, Morgan County, IN, Newton County, IN, Owen County, IN, Parke County, IN, Pike County, IN, Porter County, IN, Posey County, IN, Pulaski County, IN, Putnam County, IN, Saint Joseph County, IN, Spencer County, IN, Starke County, IN, Sullivan County, IN, Tippecanoe County, IN, Tipton County, IN, Vanderburgh County, IN, Vermillion County, IN, Vigo County, IN, Warren County, IN, Warrick County, IN, White County, IN, Berrien County, MI, City of Saint Louis, MO, Saint Louis County, MO

The radar

The Evansville,IN radar (KVWX), 102 km from the middle of the area, began a volume at 17:35 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, 5.6 hours before the alert went out and 122 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: 1358 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 86 m²/s²
0-3 km storm-relative helicity: 66 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 31, 10:46 AM CDT	Mesoscale Discussion	SPC	Boone, Bureau, Carroll, Cook, DeKalb, DuPage and 21 more	89 min
Mar 31, 5:09 PM CDT	Mesoscale Discussion	SPC	Alexander, Edwards, Gallatin, Hamilton, Hardin, Johnson and 9 more	96 min
Mar 30, 7:44 PM CDT	Severe Thunderstorm Watch	SPC	Barry, Barton, Camden, Cedar, Dade, Dallas and 9 more	4 hr
Mar 30, 8:37 PM CDT	Mesoscale Discussion	SPC	Barry, Barton, Cedar, Dade, Jasper, Lawrence and 3 more	53 min
Mar 30, 10:48 PM CDT	Mesoscale Discussion	SPC	Dallas, Greene, Laclede, Lawrence, Newton, Polk and 1 more	57 min
Mar 31, 10:26 AM CDT	Mesoscale Discussion	SPC	Dunklin, Pemiscot	3 hr
Mar 31, 10:58 AM CDT	Severe Thunderstorm Watch	SPC	Dunklin, Mississippi, New Madrid, Pemiscot	5 hr

Nearby

Mesoscale Discussions in Illinois, 2016 Mesoscale Discussions in Indiana, 2016 Mesoscale Discussions in Missouri, 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.