Alert archive / Illinois / Mesoscale Discussions in 2005

Mesoscale Discussion 2490

November 28, 20056 states

The Storm Prediction Center issued this mesoscale discussion at Nov 28, 2005, 3:28 AM CST for 6 states. It was in force for 62 min.

The area

The outline as issued.

The facts

Issued
Nov 28, 2005, 3:28 AM CST (09:28 UTC)
Expired
Nov 28, 2005, 4:30 AM CST
In force
62 min
Issued by
the Storm Prediction Center
All 108 counties

Alexander County, IL, Clark County, IL, Clay County, IL, Coles County, IL, Crawford County, IL, Cumberland County, IL, Douglas County, IL, Edgar 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, Macon County, IL, Marion County, IL, Massac County, IL, Moultrie County, IL, Perry County, IL, Pope County, IL, Pulaski County, IL, Richland County, IL, Saline County, IL, Shelby County, IL, Union County, IL, Wabash County, IL, Wayne County, IL, White County, IL, Williamson County, IL, Gibson County, IN, Knox County, IN, Pike County, IN, Posey County, IN, Sullivan County, IN, Vanderburgh County, IN, Vermillion County, IN, Vigo 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, Muhlenberg County, KY, Todd County, KY, Trigg County, KY, Union County, KY, Webster County, KY, Mississippi County, MO, Alcorn County, MS, Benton County, MS, Calhoun County, MS, Chickasaw County, MS, Itawamba County, MS, Lafayette County, MS, Lee County, MS, Marshall County, MS, Monroe County, MS, Panola County, MS, Pontotoc County, MS, Prentiss County, MS, Tallahatchie County, MS, Tate County, MS, Tippah County, MS, Tishomingo County, MS, Union County, MS, Yalobusha County, MS, Benton County, TN, Carroll County, TN, Chester County, TN, Crockett County, TN, Decatur County, TN, Dickson County, TN, Fayette County, TN, Gibson County, TN, Hardeman County, TN, Hardin County, TN, Haywood County, TN, Henderson County, TN, Henry County, TN, Hickman County, TN, Houston County, TN, Humphreys County, TN, Madison County, TN, McNairy County, TN, Montgomery County, TN, Obion County, TN, Perry County, TN, Stewart County, TN, Wayne County, TN, Weakley County, TN

The radar

The Paducah radar (KPAH), 56 km from the middle of the area, began a volume at 09:30 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

Nashville Metro, TN (KBNA), launched 00:00Z, 9.5 hours before the alert went out and 198 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, Nashville Metro, TN at 00:00Z on 2005-11-28Temperature 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, Nashville Metro, TN at 00:00Z on 2005-11-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 177 square meters per square second.1939587897Sfc1 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
758 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
177 m²/s²
0-3 km storm-relative helicity
196 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
Nov 27, 8:09 PM CSTMesoscale DiscussionSPCAdams, Calhoun, Greene, Jersey, Madison, Monroe and 2 more2 hr
Nov 27, 8:28 PM CSTTornado WatchSPCCalhoun, Greene, Jersey, Madison, Monroe, Randolph and 1 more5 hr
Nov 27, 11:21 PM CSTMesoscale DiscussionSPCBond, Calhoun, Christian, Clinton, Fayette, Greene and 16 more84 min
Nov 27, 11:26 PM CSTTornado WatchSPCAlexander, Bond, Christian, Clark, Clay, Clinton and 37 more7 hr
Nov 28, 12:43 AM CSTMesoscale DiscussionSPCAlexander62 min
Nov 28, 10:52 AM CSTMesoscale DiscussionSPCClark, Crawford, Floyd, Harrison, Perry113 min
Nov 28, 11:13 AM CSTTornado WatchSPCClark, Floyd, Harrison, Jefferson, Scott, Washington7 hr
Nov 28, 11:18 AM CSTMesoscale DiscussionSPCAdams, Allen, Blackford, Dearborn, Decatur, DeKalb and 16 more87 min
Nov 27, 8:44 PM CSTMesoscale DiscussionSPCCalloway, Carlisle, Fulton, Graves, Hickman91 min
Nov 28, 2:17 PM CSTMesoscale DiscussionSPCAdair, Allen, Anderson, Barren, Bath, Bell and 56 more88 min
Nov 27, 11:44 PM CSTTornado WatchSPCAdams, Attala, Bolivar, Carroll, Choctaw, Claiborne and 23 more6 hr
Nov 28, 2:40 AM CSTMesoscale DiscussionSPCAdams, Attala, Carroll, Choctaw, Claiborne, Clay and 25 more95 min
Nov 28, 4:42 AM CSTMesoscale DiscussionSPCAmite, Marion, Pike, Walthall, Wilkinson93 min
Nov 28, 9:29 AM CSTMesoscale DiscussionSPCClarke, Forrest, George, Greene, Harrison, Jackson and 11 more2 hr
Nov 27, 6:19 PM CSTTornado WatchSPCBollinger, Butler, Cape Girardeau, Carter, Dunklin, Mississippi and 7 more8 hr

Nearby

Mesoscale Discussions in Illinois, 2005Mesoscale Discussions in Tennessee, 2005Mesoscale Discussions in Kentucky, 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.