Alert archive / Illinois / Mesoscale Discussions in 2003

Mesoscale Discussion 1303

June 10, 20036 counties in Illinois; 6 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Jun 10, 2003, 5:07 PM CDT for 6 counties in Illinois; 6 counties in Missouri. It was in force for 113 min.

The area

The outline as issued.

The facts

Issued: Jun 10, 2003, 5:07 PM CDT (22:07 UTC)
Expired: Jun 10, 2003, 7:00 PM CDT
In force: 113 min
Issued by: the Storm Prediction Center

Counties Jackson County, IL, Monroe County, IL, Perry County, IL, Randolph County, IL, Saint Clair County, IL, Washington County, IL, Crawford County, MO, Jefferson County, MO, Perry County, MO, Saint Francois County, MO, Sainte Genevieve County, MO, Washington County, MO

The radar

The St Louis radar (KLSX), 67 km from the middle of the area, began a volume at 22:09 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 507Jun 10, 6:35 PM CDT

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 10.1 hours before the alert went out and 271 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: 77 J/kg
Mixed-layer CIN: -103 J/kg
Mixed-layer LCL: 1451 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 102 m²/s²
0-3 km storm-relative helicity: 63 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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
Jun 10, 7:15 AM CDT	Severe Thunderstorm Watch	SPC	Alexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 16 more	6 hr
Jun 10, 10:24 AM CDT	Mesoscale Discussion	SPC	Alexander, Franklin, Gallatin, Hamilton, Hardin, Jackson and 14 more	2 hr
Jun 10, 3:40 PM CDT	Severe Thunderstorm Watch	SPC	Adams, Bond, Brown, Calhoun, Cass, Christian and 23 more	5 hr
Jun 10, 6:35 PM CDT	Severe Thunderstorm Watch	SPC	Bond, Clay, Clinton, Crawford, Edwards, Effingham and 22 more	4 hr
Jun 9, 9:22 PM CDT	Mesoscale Discussion	SPC	Gentry, Harrison, Mercer, Nodaway, Putnam, Schuyler and 3 more	53 min
Jun 9, 11:46 PM CDT	Mesoscale Discussion	SPC	Andrew, Atchison, Holt, Nodaway	119 min
Jun 10, 12:15 AM CDT	Severe Thunderstorm Watch	SPC	Andrew, Atchison, Buchanan, Clinton, Daviess, DeKalb and 7 more	5 hr
Jun 10, 2:44 AM CDT	Mesoscale Discussion	SPC	Adair, Andrew, Atchison, Buchanan, Caldwell, Clay and 18 more	2 hr
Jun 10, 7:07 AM CDT	Mesoscale Discussion	SPC	Barry, Barton, Bates, Bollinger, Butler, Camden and 36 more	113 min
Jun 10, 12:18 PM CDT	Mesoscale Discussion	SPC	Audrain, Barton, Bates, Benton, Boone, Callaway and 33 more	117 min
Jun 10, 12:50 PM CDT	Severe Thunderstorm Watch	SPC	Bates, Benton, Camden, Carroll, Cass, Cedar and 17 more	6 hr
Jun 10, 5:55 PM CDT	Mesoscale Discussion	SPC	Bates, Cass, Cooper, Henry, Howard, Jackson and 4 more	95 min

Nearby

Mesoscale Discussions in Illinois, 2003 Mesoscale Discussions in Missouri, 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.