Alert archive / Illinois / Mesoscale Discussions in 2005

Mesoscale Discussion 2086

August 26, 20055 states

The Storm Prediction Center issued this mesoscale discussion at Aug 26, 2005, 2:41 PM CDT for 5 states. It was in force for 64 min.

The area

The outline as issued.

The facts

Issued: Aug 26, 2005, 2:41 PM CDT (19:41 UTC)
Expired: Aug 26, 2005, 3:45 PM CDT
In force: 64 min
Issued by: the Storm Prediction Center

All 80 counties

Alexander County, IL, Bond County, IL, Clay County, IL, Clinton County, IL, Crawford County, IL, Edwards County, IL, Effingham County, IL, Fayette County, IL, Franklin County, IL, Gallatin County, IL, Hamilton County, IL, Hardin County, IL, Jackson County, IL, Jasper County, IL, Jefferson County, IL, Johnson County, IL, Lawrence County, IL, Marion County, IL, Massac County, IL, Monroe County, IL, Perry County, IL, Pope County, IL, Pulaski County, IL, Randolph County, IL, Richland County, IL, Saint Clair County, IL, Saline County, IL, Union County, IL, Wabash County, IL, Washington County, IL, Wayne County, IL, White County, IL, Williamson County, IL, Daviess County, IN, Gibson County, IN, Knox County, IN, Pike County, IN, Posey County, IN, Vanderburgh County, IN, Warrick County, IN, Ballard County, KY, Caldwell County, KY, Calloway County, KY, Carlisle County, KY, Christian County, KY, Crittenden County, KY, Fulton County, KY, Graves County, KY, Henderson County, KY, Hickman County, KY, Hopkins County, KY, Livingston County, KY, Lyon County, KY, Marshall County, KY, McCracken County, KY, McLean County, KY, Todd County, KY, Trigg County, KY, Union County, KY, Webster County, KY, Bollinger County, MO, Butler County, MO, Cape Girardeau County, MO, Carter County, MO, Iron County, MO, Madison County, MO, Mississippi County, MO, New Madrid County, MO, Oregon County, MO, Perry County, MO, Reynolds County, MO, Ripley County, MO, Saint Francois County, MO, Sainte Genevieve County, MO, Scott County, MO, Shannon County, MO, Stoddard County, MO, Wayne County, MO, Montgomery County, TN, Stewart County, TN

The radar

The Paducah radar (KPAH), 77 km from the middle of the area, began a volume at 19:41 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 12:00Z, 7.7 hours before the alert went out and 288 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 775 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 4 m²/s²
0-3 km storm-relative helicity: 74 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
Aug 26, 10:15 AM CDT	Mesoscale Discussion	SPC	Alexander, Calhoun, Clinton, Franklin, Jackson, Jersey and 8 more	3 hr
Aug 26, 10:55 AM CDT	Severe Thunderstorm Watch	SPC	Alexander, Bond, Calhoun, Clay, Clinton, Crawford and 30 more	7 hr
Aug 26, 3:56 PM CDT	Mesoscale Discussion	SPC	Clark, Crawford, Daviess, Dubois, Floyd, Greene and 10 more	64 min
Aug 26, 5:33 PM CDT	Mesoscale Discussion	SPC	Fulton	57 min
Aug 26, 4:40 PM CDT	Severe Thunderstorm Watch	SPC	Barry, Barton, Cedar, Christian, Dade, Greene and 6 more	6 hr

Nearby

Mesoscale Discussions in Illinois, 2005 Mesoscale Discussions in Kentucky, 2005 Mesoscale Discussions in Missouri, 2005 Every 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.