Alert archive / Missouri / Mesoscale Discussions in 2005

Mesoscale Discussion 2236

September 19, 200517 counties in Illinois; 31 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Sep 19, 2005, 5:20 PM CDT for 17 counties in Illinois; 31 counties in Missouri. It was in force for 55 min.

The area

The outline as issued.

The facts

Issued
Sep 19, 2005, 5:20 PM CDT (22:20 UTC)
Expired
Sep 19, 2005, 6:15 PM CDT
In force
55 min
Issued by
the Storm Prediction Center
All 48 counties

Bond County, IL, Calhoun County, IL, Christian County, IL, Clinton County, IL, Effingham County, IL, Fayette County, IL, Greene County, IL, Jersey County, IL, Macoupin County, IL, Madison County, IL, Marion County, IL, Monroe County, IL, Montgomery County, IL, Pike County, IL, Saint Clair County, IL, Scott County, IL, Washington County, IL, Audrain County, MO, Bates County, MO, Benton County, MO, Boone County, MO, Callaway County, MO, Camden County, MO, City of Saint Louis, MO, Cole County, MO, Cooper County, MO, Crawford County, MO, Franklin County, MO, Gasconade County, MO, Henry County, MO, Howard County, MO, Jefferson County, MO, Johnson County, MO, Lincoln County, MO, Maries County, MO, Miller County, MO, Moniteau County, MO, Montgomery County, MO, Morgan County, MO, Osage County, MO, Pettis County, MO, Pike County, MO, Ralls County, MO, Saint Charles County, MO, Saint Louis County, MO, St. Clair County, MO, Warren County, MO, Washington County, MO

The radar

The St Louis radar (KLSX), 93 km from the middle of the area, began a volume at 22:22 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

Springfield, MO (KSGF), launched 12:00Z, 10.3 hours before the alert went out and 267 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, Springfield, MO at 12:00Z on 2005-09-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 771 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, Springfield, MO at 12:00Z on 2005-09-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 150 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
771 J/kg
Mixed-layer CIN
-346 J/kg
Mixed-layer LCL
1510 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
150 m²/s²
0-3 km storm-relative helicity
132 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
Sep 18, 8:13 PM CDTMesoscale DiscussionSPCAdams, Hancock, Henderson, McDonough, Mercer, Schuyler and 1 more62 min
Sep 19, 1:34 AM CDTMesoscale DiscussionSPCBureau, Carroll, Cass, Christian, Coles, DeWitt and 30 more86 min
Sep 19, 11:49 AM CDTMesoscale DiscussionSPCAdams, Brown, Cass, Fulton, Hancock, Henderson and 13 more86 min
Sep 19, 1:00 PM CDTSevere Thunderstorm WatchSPCAdams, Brown, Cass, Fulton, Hancock, Henderson and 11 more5 hr
Sep 19, 3:02 PM CDTMesoscale DiscussionSPCChampaign, DeWitt, Ford, Grundy, Iroquois, Kankakee and 6 more88 min
Sep 19, 3:25 PM CDTSevere Thunderstorm WatchSPCChampaign, Coles, DeWitt, Douglas, Edgar, Ford and 9 more6 hr
Sep 19, 3:48 PM CDTMesoscale DiscussionSPCAdams, Brown, Bureau, Cass, Fulton, Hancock and 14 more87 min
Sep 19, 5:50 PM CDTSevere Thunderstorm WatchSPCCalhoun, Christian, Greene, Jersey, Logan, Macoupin and 7 more5 hr
Sep 19, 5:54 PM CDTMesoscale DiscussionSPCCass, Champaign, Christian, Clark, Coles, Crawford and 16 more96 min
Sep 18, 10:00 PM CDTMesoscale DiscussionSPCPutnam, Worth60 min

Nearby

Mesoscale Discussions in Missouri, 2005Mesoscale Discussions in Illinois, 2005Every mesoscale discussion in 2005

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.