Alert archive / Missouri / Mesoscale Discussions in 2003

Mesoscale Discussion 1736

July 9, 200323 counties in Illinois; 30 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Jul 9, 2003, 12:34 PM CDT for 23 counties in Illinois; 30 counties in Missouri. It was in force for 56 min.

The area

The outline as issued.

The facts

Issued
Jul 9, 2003, 12:34 PM CDT (17:34 UTC)
Expired
Jul 9, 2003, 1:30 PM CDT
In force
56 min
Issued by
the Storm Prediction Center
All 53 counties

Adams County, IL, Bond County, IL, Brown County, IL, Calhoun County, IL, Clinton County, IL, Effingham County, IL, Fayette County, IL, Franklin County, IL, Greene County, IL, Jefferson County, IL, Jersey County, IL, Macoupin County, IL, Madison County, IL, Marion County, IL, Monroe County, IL, Montgomery County, IL, Morgan County, IL, Perry County, IL, Pike County, IL, Randolph County, IL, Saint Clair County, IL, Scott County, IL, Washington County, IL, Adair County, MO, Audrain County, MO, Boone County, MO, Callaway County, MO, Chariton County, MO, City of Saint Louis, MO, Cole County, MO, Cooper County, MO, Franklin County, MO, Gasconade County, MO, Howard County, MO, Jefferson County, MO, Knox County, MO, Lewis County, MO, Lincoln County, MO, Macon County, MO, Marion County, MO, Moniteau County, MO, Monroe County, MO, Montgomery County, MO, Osage County, MO, Pettis County, MO, Pike County, MO, Ralls County, MO, Randolph County, MO, Saint Charles County, MO, Saint Louis County, MO, Saline County, MO, Shelby County, MO, Warren County, MO

The radar

The St Louis radar (KLSX), 76 km from the middle of the area, began a volume at 17:34 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.

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 5.6 hours before the alert went out and 247 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-pSkew-T log-p diagram, Lincoln, IL at 12:00Z on 2003-07-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 279 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lincoln, IL at 12:00Z on 2003-07-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 116 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
279 J/kg
Mixed-layer CIN
-182 J/kg
Mixed-layer LCL
874 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
116 m²/s²
0-3 km storm-relative helicity
106 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.

IssuedProductOfficeCountiesLasted
Jul 8, 8:59 PM CDTMesoscale DiscussionSPCAdams, Brown, Cass, Champaign, Christian, Clark and 36 more2 hr
Jul 8, 10:55 PM CDTSevere Thunderstorm WatchSPCBond, Cass, Champaign, Christian, Clark, Clay and 27 more5 hr
Jul 9, 2:21 AM CDTMesoscale DiscussionSPCBond, Cass, Champaign, Christian, Clark, Clay and 27 more114 min
Jul 9, 9:54 AM CDTMesoscale DiscussionSPCBureau, Champaign, Christian, Clark, Coles, Crawford and 28 more96 min
Jul 9, 11:10 AM CDTSevere Thunderstorm WatchSPCBureau, Champaign, Clark, Coles, DeWitt, Douglas and 17 more6 hr
Jul 9, 1:35 PM CDTMesoscale DiscussionSPCChampaign, Coles, Douglas, Edgar, Ford, Grundy and 4 more55 min
Jul 9, 3:12 PM CDTMesoscale DiscussionSPCClark, Edgar, Kankakee33 min
Jul 9, 3:15 PM CDTTornado WatchSPCCarroll, Henderson, Henry, Jo Daviess, Knox, Mercer and 5 more6 hr
Jul 9, 5:04 PM CDTMesoscale DiscussionSPCChampaign, Christian, Clark, Coles, Crawford, Cumberland and 18 more86 min
Jul 9, 5:25 PM CDTTornado WatchSPCCass, Champaign, Christian, Clark, Coles, Cumberland and 24 more4 hr
Jul 9, 5:38 PM CDTMesoscale DiscussionSPCBureau, Fulton, Hancock, Henderson, Henry, Knox and 12 more97 min
Jul 9, 2:10 PM CDTMesoscale DiscussionSPCBuchanan, Clay, Platte35 min
Jul 9, 3:55 PM CDTSevere Thunderstorm WatchSPCAdair, Andrew, Atchison, Buchanan, Caldwell, Carroll and 22 more6 hr
Jul 9, 6:13 PM CDTMesoscale DiscussionSPCAndrew, Bates, Buchanan, Caldwell, Carroll, Cass and 26 more92 min

Nearby

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