Alert archive / Illinois / Mesoscale Discussions in 2005

Mesoscale Discussion 443

March 30, 20054 states

The Storm Prediction Center issued this mesoscale discussion at Mar 30, 2005, 7:11 PM CST for 4 states. It was in force for 64 min.

The area

The outline as issued.

The facts

Issued: Mar 30, 2005, 7:11 PM CST (01:11 UTC)
Expired: Mar 30, 2005, 8:15 PM CST
In force: 64 min
Issued by: the Storm Prediction Center

All 101 counties

Alexander County, IL, 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, Grundy County, IL, Hamilton County, IL, Hardin 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, Macon County, IL, Marion County, IL, Massac County, IL, McLean County, IL, Montgomery County, IL, Moultrie County, IL, Perry County, IL, Piatt County, IL, Pope County, IL, Pulaski County, IL, Randolph County, IL, Richland County, IL, Saline County, IL, Shelby County, IL, Union County, IL, Vermilion County, IL, Wabash County, IL, Washington County, IL, Wayne County, IL, White County, IL, Will County, IL, Williamson County, IL, Benton County, IN, Carroll County, IN, Clay County, IN, Fountain County, IN, Gibson County, IN, Jasper County, IN, Knox County, IN, Lake County, IN, LaPorte County, IN, Montgomery County, IN, Newton County, IN, Parke County, IN, Porter County, IN, Posey County, IN, Pulaski County, IN, Saint Joseph County, IN, Starke County, IN, Sullivan County, IN, Tippecanoe County, IN, Vanderburgh County, IN, Vermillion County, IN, Vigo County, IN, Warren County, IN, White County, IN, Ballard County, KY, Caldwell County, KY, Calloway County, KY, Carlisle County, KY, Crittenden County, KY, Fulton County, KY, Graves County, KY, Henderson County, KY, Hickman County, KY, Livingston County, KY, Lyon County, KY, Marshall County, KY, McCracken County, KY, Trigg County, KY, Union County, KY, Webster County, KY, Bollinger County, MO, Cape Girardeau County, MO, Madison County, MO, Mississippi County, MO, New Madrid County, MO, Perry County, MO, Sainte Genevieve County, MO, Scott County, MO, Stoddard County, MO

The radar

The Evansville,IN radar (KVWX), 84 km from the middle of the area, began a volume at 01:15 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

Severe Thunderstorm Watch 109Mar 30, 7:30 PM CST

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 1.2 hours before the alert went out and 170 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: 926 J/kg
Mixed-layer CIN: -45 J/kg
Mixed-layer LCL: 1436 m above ground
0-6 km bulk shear: 70 kt
0-1 km storm-relative helicity: 311 m²/s²
0-3 km storm-relative helicity: 338 m²/s²
Significant tornado parameter: 0.9
Supercell composite: 7.0

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
Mar 30, 7:30 PM CST	Severe Thunderstorm Watch	SPC	Alexander, Champaign, Clark, Clay, Clinton, Coles and 46 more	8 hr
Mar 30, 10:40 PM CST	Mesoscale Discussion	SPC	Crawford, Edwards, Gallatin, Hardin, Lawrence, Massac and 3 more	95 min
Mar 31, 2:08 AM CST	Mesoscale Discussion	SPC	Clinton, Cumberland, Knox, Laurel, McCreary, Monroe and 4 more	97 min

Nearby

Mesoscale Discussions in Illinois, 2005 Mesoscale Discussions in Indiana, 2005 Mesoscale Discussions in Kentucky, 2005 Every mesoscale discussion in 2005

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.