Alert archive / Illinois / Mesoscale Discussions in 2003

Mesoscale Discussion 905

May 10, 20034 states

The Storm Prediction Center issued this mesoscale discussion at May 10, 2003, 9:25 AM CDT for 4 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: May 10, 2003, 9:25 AM CDT (14:25 UTC)
Expired: May 10, 2003, 11:30 AM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

All 43 counties

Edwards County, IL, Franklin County, IL, Gallatin County, IL, Hamilton County, IL, Hardin County, IL, Jackson County, IL, Jefferson County, IL, Johnson County, IL, Marion County, IL, Monroe County, IL, Perry County, IL, Randolph County, IL, Saint Clair County, IL, Saline County, IL, Union County, IL, Wabash County, IL, Washington County, IL, Wayne County, IL, White County, IL, Williamson County, IL, Crawford County, IN, Dubois County, IN, Gibson County, IN, Perry County, IN, Pike County, IN, Posey County, IN, Spencer County, IN, Vanderburgh County, IN, Warrick County, IN, Breckinridge County, KY, Daviess County, KY, Hancock County, KY, Henderson County, KY, McLean County, KY, Union County, KY, Webster County, KY, Iron County, MO, Jefferson County, MO, Madison County, MO, Perry County, MO, Saint Francois County, MO, Sainte Genevieve County, MO, Washington County, MO

The radar

The Paducah radar (KPAH), 117 km from the middle of the area, began a volume at 14:27 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, 2.4 hours before the alert went out and 235 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: 474 J/kg
Mixed-layer CIN: -156 J/kg
Mixed-layer LCL: 763 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 106 m²/s²
0-3 km storm-relative helicity: 168 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.8

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
May 9, 7:47 PM CDT	Mesoscale Discussion	SPC	Calhoun, Greene, Morgan, Pike, Scott	88 min
May 9, 8:40 PM CDT	Mesoscale Discussion	SPC	Bond, Champaign, Christian, Clark, Clinton, Coles and 18 more	2 hr
May 9, 10:04 PM CDT	Mesoscale Discussion	SPC	Adams	26 min
May 9, 10:40 PM CDT	Severe Thunderstorm Watch	SPC	Brown, Cass, Champaign, DeWitt, Ford, Fulton and 22 more	5 hr
May 10, 5:43 AM CDT	Mesoscale Discussion	SPC	Adams, Brown, Calhoun, Cass, Christian, Fulton and 15 more	92 min
May 10, 5:50 AM CDT	Severe Thunderstorm Watch	SPC	Adams, Bond, Brown, Calhoun, Cass, Christian and 25 more	5 hr
May 10, 8:30 AM CDT	Tornado Watch	SPC	Champaign, Clark, Clay, Coles, Crawford, Cumberland and 9 more	6 hr
May 10, 10:39 AM CDT	Mesoscale Discussion	SPC	Clark, Clay, Coles, Crawford, Cumberland, Douglas and 5 more	2 hr
May 10, 10:54 AM CDT	Mesoscale Discussion	SPC	Adams, Alexander, Bond, Brown, Calhoun, Cass and 69 more	66 min
May 10, 12:38 PM CDT	Mesoscale Discussion	SPC	Clay, Crawford, Jasper, Lawrence, Richland	97 min
May 10, 3:17 PM CDT	Mesoscale Discussion	SPC	Hancock, Henderson, Mercer, Rock Island	58 min
May 10, 3:50 PM CDT	Tornado Watch	SPC	Bureau, Carroll, Fulton, Henderson, Henry, Jo Daviess and 14 more	6 hr
May 10, 4:00 PM CDT	Tornado Watch	SPC	Franklin, Jackson, Perry, Randolph, Union	5 hr
May 10, 4:48 PM CDT	Mesoscale Discussion	SPC	Adams, Bond, Brown, Calhoun, Cass, Christian and 25 more	87 min
May 10, 5:40 PM CDT	Tornado Watch	SPC	Adams, Bond, Brown, Calhoun, Cass, Christian and 21 more	5 hr
May 10, 6:41 PM CDT	Mesoscale Discussion	SPC	Adams, Bond, Brown, Calhoun, Cass, Christian and 14 more	64 min
May 10, 3:33 AM CDT	Mesoscale Discussion	SPC	Bartholomew, Boone, Brown, Clark, Crawford, Daviess and 41 more	87 min
May 10, 11:00 AM CDT	Tornado Watch	SPC	Blackford, Dearborn, Delaware, Fayette, Franklin, Henry and 7 more	5 hr
May 10, 1:04 PM CDT	Mesoscale Discussion	SPC	Blackford, Dearborn, Delaware, Fayette, Franklin, Henry and 7 more	86 min
May 10, 10:12 AM CDT	Mesoscale Discussion	SPC	Boone, Bracken, Campbell, Greenup, Harrison, Kenton and 4 more	2 hr
May 10, 11:41 AM CDT	Mesoscale Discussion	SPC	Bell, Breathitt, Clay, Floyd, Harlan, Jackson and 13 more	2 hr
May 10, 12:20 PM CDT	Tornado Watch	SPC	Bell, Boyd, Breathitt, Carter, Clay, Elliott and 19 more	6 hr
May 10, 2:27 PM CDT	Mesoscale Discussion	SPC	Bell, Boyd, Breathitt, Carter, Clay, Elliott and 20 more	93 min
May 10, 2:46 PM CDT	Mesoscale Discussion	SPC	Boyd, Bracken, Campbell, Fleming, Grant, Greenup and 6 more	59 min
May 10, 4:56 PM CDT	Mesoscale Discussion	SPC	Boyd, Breathitt, Carter, Elliott, Floyd, Greenup and 10 more	94 min
May 10, 5:30 PM CDT	Tornado Watch	SPC	Boyd, Breathitt, Carter, Elliott, Floyd, Greenup and 11 more	6 hr
May 9, 11:00 PM CDT	Severe Thunderstorm Watch	SPC	Adair, Barton, Bates, Benton, Caldwell, Carroll and 36 more	6 hr
May 10, 1:15 AM CDT	Severe Thunderstorm Watch	SPC	Andrew	5 hr
May 10, 1:22 AM CDT	Mesoscale Discussion	SPC	Newton	83 min
May 10, 2:28 AM CDT	Mesoscale Discussion	SPC	Andrew, Buchanan	92 min
May 10, 3:05 AM CDT	Tornado Watch	SPC	Barton, Bates, Benton, Cedar, Dade, Henry and 7 more	5 hr
May 10, 3:15 AM CDT	Severe Thunderstorm Watch	SPC	Adair, Andrew, Atchison, Buchanan, Caldwell, Carroll and 25 more	5 hr
May 10, 5:27 AM CDT	Mesoscale Discussion	SPC	Barton, Bates, Benton, Cass, Cedar, Dade and 9 more	93 min
May 10, 7:06 AM CDT	Mesoscale Discussion	SPC	Adair, Andrew, Atchison, Buchanan, Caldwell, Carroll and 25 more	54 min
May 10, 10:58 AM CDT	Mesoscale Discussion	SPC	Adair, Andrew, Audrain, Barton, Bates, Benton and 42 more	2 hr
May 10, 11:35 AM CDT	Tornado Watch	SPC	Adair, Audrain, Bates, Benton, Boone, Caldwell and 38 more	7 hr
May 10, 11:55 AM CDT	Tornado Watch	SPC	Barry, Barton, Camden, Cedar, Christian, Dade and 13 more	7 hr
May 10, 1:42 PM CDT	Mesoscale Discussion	SPC	Adair, Audrain, Bates, Benton, Boone, Caldwell and 38 more	2 hr
May 10, 1:59 PM CDT	Mesoscale Discussion	SPC	Barry, Barton, Camden, Cedar, Christian, Dade and 12 more	2 hr
May 10, 3:30 PM CDT	Mesoscale Discussion	SPC	Crawford, Dent, Douglas, Franklin, Gasconade, Howell and 16 more	2 hr

Nearby

Mesoscale Discussions in Illinois, 2003 Mesoscale Discussions in Indiana, 2003 Mesoscale Discussions in Kentucky, 2003 Every mesoscale discussion in 2003

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.