Alert archive / Illinois / Mesoscale Discussions in 2006

Mesoscale Discussion 963

May 24, 200643 counties in Illinois; 21 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at May 24, 2006, 2:23 PM CDT for 43 counties in Illinois; 21 counties in Missouri. It was in force for 97 min.

The area

The outline as issued.

The facts

Issued
May 24, 2006, 2:23 PM CDT (19:23 UTC)
Expired
May 24, 2006, 4:00 PM CDT
In force
97 min
Issued by
the Storm Prediction Center
All 64 counties

Adams County, IL, Bond County, IL, Brown County, IL, Calhoun County, IL, Cass County, IL, Champaign County, IL, Christian County, IL, Clay County, IL, Clinton County, IL, Coles County, IL, Cumberland County, IL, DeWitt County, IL, Douglas County, IL, Effingham County, IL, Fayette County, IL, Fulton County, IL, Greene County, IL, Jasper County, IL, Jefferson County, IL, Jersey County, IL, Logan County, IL, Macon County, IL, Macoupin County, IL, Madison County, IL, Marion County, IL, Mason County, IL, Menard County, IL, Monroe County, IL, Montgomery County, IL, Morgan County, IL, Moultrie County, IL, Perry County, IL, Piatt County, IL, Pike County, IL, Richland County, IL, Saint Clair County, IL, Sangamon County, IL, Schuyler County, IL, Scott County, IL, Shelby County, IL, Tazewell County, IL, Washington County, IL, Wayne County, IL, Audrain County, MO, Boone County, MO, Callaway County, MO, City of Saint Louis, MO, Cole County, MO, Cooper County, MO, Franklin County, MO, Gasconade County, MO, Jefferson County, MO, Lincoln County, MO, Maries County, MO, Miller County, MO, Moniteau County, MO, Montgomery County, MO, Morgan County, MO, Osage County, MO, Pike County, MO, Ralls County, MO, Saint Charles County, MO, Saint Louis County, MO, Warren County, MO

The radar

The St Louis radar (KLSX), 30 km from the middle of the area, began a volume at 19:24 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, 7.4 hours before the alert went out and 230 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 2006-05-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2006-05-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 226 square meters per square second.1939Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1421 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
226 m²/s²
0-3 km storm-relative helicity
204 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
May 24, 11:27 AM CDTMesoscale DiscussionSPCAdams, Hancock2 hr
May 24, 12:25 PM CDTTornado WatchSPCAdams, Brown, Calhoun, Greene, Pike7 hr
May 24, 1:37 PM CDTMesoscale DiscussionSPCCarroll, Jo Daviess, Rock Island, Stephenson, Whiteside83 min
May 24, 2:46 PM CDTTornado WatchSPCBond, Boone, Bureau, Carroll, Cass, Champaign and 63 more7 hr
May 24, 4:26 PM CDTMesoscale DiscussionSPCChampaign, Christian, Clark, Clay, Coles, Cook and 24 more94 min
May 24, 4:42 PM CDTSevere Thunderstorm WatchSPCCook, DuPage, Iroquois, Kankakee, Will5 hr
May 24, 6:18 PM CDTSevere Thunderstorm WatchSPCAlexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 15 more7 hr
May 24, 6:24 PM CDTMesoscale DiscussionSPCMcHenry96 min
May 24, 6:54 PM CDTSevere Thunderstorm WatchSPCKane, Lake, McHenry4 hr
May 23, 10:06 PM CDTMesoscale DiscussionSPCAtchison114 min
May 24, 1:56 AM CDTMesoscale DiscussionSPCAndrew, Buchanan, Caldwell, Carroll, Cass, Clay and 15 more94 min
May 24, 1:29 PM CDTMesoscale DiscussionSPCBarry, Barton, Benton, Camden, Carter, Cedar and 39 more2 hr
May 24, 5:45 PM CDTMesoscale DiscussionSPCBarry, Barton, Bollinger, Butler, Camden, Cape Girardeau and 36 more2 hr

Nearby

Mesoscale Discussions in Illinois, 2006Mesoscale Discussions in Missouri, 2006Every mesoscale discussion in 2006

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.