Alert archive / Illinois / Mesoscale Discussions in 2003

Mesoscale Discussion 1754

July 9, 200336 counties in Illinois; 20 counties in Indiana; 4 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Jul 9, 2003, 10:49 PM CDT for 36 counties in Illinois; 20 counties in Indiana; 4 counties in Missouri. It was in force for 56 min.

The area

The outline as issued.

The facts

Issued
Jul 9, 2003, 10:49 PM CDT (03:49 UTC)
Expired
Jul 9, 2003, 11:45 PM CDT
In force
56 min
Issued by
the Storm Prediction Center
All 60 counties

Adams County, IL, Bond County, IL, Brown County, IL, Calhoun County, IL, Cass County, IL, Christian County, IL, Clark County, IL, Clay County, IL, Clinton County, IL, Coles County, IL, Crawford County, IL, Cumberland County, IL, Edwards County, IL, Effingham County, IL, Fayette County, IL, Greene County, IL, Jasper County, IL, Jersey County, IL, Lawrence County, IL, Logan County, IL, Macon County, IL, Macoupin County, IL, Madison County, IL, Marion County, IL, Mason County, IL, Menard County, IL, Montgomery County, IL, Morgan County, IL, Moultrie County, IL, Pike County, IL, Richland County, IL, Sangamon County, IL, Schuyler County, IL, Scott County, IL, Shelby County, IL, Wabash County, IL, Bartholomew County, IN, Brown County, IN, Clark County, IN, Clay County, IN, Daviess County, IN, Dubois County, IN, Floyd County, IN, Greene County, IN, Jackson County, IN, Jennings County, IN, Knox County, IN, Lawrence County, IN, Martin County, IN, Monroe County, IN, Orange County, IN, Owen County, IN, Pike County, IN, Scott County, IN, Sullivan County, IN, Washington County, IN, Lincoln County, MO, Marion County, MO, Pike County, MO, Ralls County, MO

The radar

The Lincoln radar (KILX), 97 km from the middle of the area, began a volume at 03:50 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 00:00Z, 3.8 hours before the alert went out and 81 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 00:00Z on 2003-07-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3530 joules per kilogram.LCLEL10008507005003002001001 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 00:00Z on 2003-07-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 95 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
3530 J/kg
Mixed-layer CIN
-4 J/kg
Mixed-layer LCL
1110 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
95 m²/s²
0-3 km storm-relative helicity
146 m²/s²
Significant tornado parameter
0.0
Supercell composite
9.6

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 9, 8:04 PM CDTMesoscale DiscussionSPCAdams, Bond, Brown, Calhoun, Cass, Champaign and 50 more56 min
Jul 9, 8:20 PM CDTSevere Thunderstorm WatchSPCAdams, Brown, Cass, Champaign, Christian, Clark and 43 more6 hr
Jul 9, 9:50 PM CDTSevere Thunderstorm WatchSPCCalhoun, Christian, Greene, Jersey, Macoupin, Montgomery and 5 more6 hr
Jul 9, 11:39 PM CDTMesoscale DiscussionSPCCalhoun, Jersey66 min
Jul 10, 11:13 AM CDTMesoscale DiscussionSPCClark, Dearborn, Floyd, Harrison, Jefferson, Ohio and 3 more2 hr
Jul 10, 11:30 AM CDTSevere Thunderstorm WatchSPCClark, Dearborn, Floyd, Franklin, Harrison, Jefferson and 5 more6 hr
Jul 9, 8:56 PM CDTMesoscale DiscussionSPCAudrain, Barry, Barton, Bates, Benton, Boone and 44 more94 min

Nearby

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