Alert archive / Kentucky / Mesoscale Discussions in 2011

Mesoscale Discussion 954

May 25, 20116 states

The Storm Prediction Center issued this mesoscale discussion at May 25, 2011, 11:02 AM CDT for 6 states. It was in force for 28 min.

The area

The outline as issued.

The facts

Issued
May 25, 2011, 11:02 AM CDT (16:02 UTC)
Expired
May 25, 2011, 11:30 AM CDT
In force
28 min
Issued by
the Storm Prediction Center
All 102 counties

Clay County, AR, Alexander County, IL, Franklin County, IL, Gallatin County, IL, Hamilton County, IL, Hardin County, IL, Jackson County, IL, Jefferson County, IL, Johnson County, IL, Massac County, IL, Monroe County, IL, Perry County, IL, Pope County, IL, Pulaski County, IL, Randolph County, IL, Saline County, IL, Union County, IL, Washington County, IL, White County, IL, Williamson County, IL, Gibson County, IN, Perry County, IN, Posey County, IN, Spencer County, IN, Vanderburgh County, IN, Warrick County, IN, Allen County, KY, Ballard County, KY, Barren County, KY, Breckinridge County, KY, Butler County, KY, Caldwell County, KY, Calloway County, KY, Carlisle County, KY, Christian County, KY, Crittenden County, KY, Daviess County, KY, Edmonson County, KY, Fulton County, KY, Graves County, KY, Grayson County, KY, Hancock County, KY, Hart County, KY, Henderson County, KY, Hickman County, KY, Hopkins County, KY, Livingston County, KY, Logan County, KY, Lyon County, KY, Marshall County, KY, McCracken County, KY, McLean County, KY, Meade County, KY, Metcalfe County, KY, Monroe County, KY, Muhlenberg County, KY, Ohio County, KY, Simpson County, KY, Todd County, KY, Trigg County, KY, Union County, KY, Warren County, KY, Webster County, KY, Bollinger County, MO, Butler County, MO, Cape Girardeau County, MO, Carter County, MO, Crawford County, MO, Dent County, MO, Dunklin County, MO, Iron County, MO, Jefferson County, MO, Madison County, MO, Mississippi County, MO, New Madrid County, MO, Pemiscot 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, Washington County, MO, Wayne County, MO, Benton County, TN, Cheatham County, TN, Dickson County, TN, Dyer County, TN, Gibson County, TN, Henry County, TN, Houston County, TN, Lake County, TN, Macon County, TN, Montgomery County, TN, Obion County, TN, Robertson County, TN, Stewart County, TN, Sumner County, TN, Trousdale County, TN, Weakley County, TN

The radar

The Paducah radar (KPAH), 47 km from the middle of the area, began a volume at 16:02 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

Nashville Metro, TN (KBNA), launched 12:00Z, 4.0 hours before the alert went out and 212 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 12:00Z on 2011-05-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1690 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, Nashville Metro, TN at 12:00Z on 2011-05-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 84 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
1690 J/kg
Mixed-layer CIN
-47 J/kg
Mixed-layer LCL
863 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
84 m²/s²
0-3 km storm-relative helicity
75 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.8

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, 7:42 PM CDTMesoscale DiscussionSPCBenton, Crawford, Little River, Polk, Scott, Sebastian and 2 more63 min
May 24, 8:05 PM CDTTornado WatchSPCBaxter, Benton, Boone, Carroll, Clark, Conway and 30 more7 hr
May 24, 11:24 PM CDTMesoscale DiscussionSPCBaxter, Boone, Carroll, Clark, Conway, Franklin and 21 more96 min
May 25, 12:48 AM CDTMesoscale DiscussionSPCClay, Craighead, Fulton, Greene, Independence, Jackson and 4 more57 min
May 25, 7:31 AM CDTMesoscale DiscussionSPCClay, Craighead, Crittenden, Cross, Greene, Mississippi and 1 more59 min
May 25, 9:54 AM CDTMesoscale DiscussionSPCBaxter, Boone, Carroll, Clay, Cleburne, Conway and 33 more96 min
May 25, 10:18 AM CDTMesoscale DiscussionSPCFulton, Independence, Izard, Jackson, St. Francis, Sharp and 2 more57 min
May 25, 10:37 AM CDTTornado WatchSPCBaxter, Boone, Carroll, Fulton, Izard, Madison and 5 more7 hr
May 25, 11:52 AM CDTMesoscale DiscussionSPCArkansas, Clark, Clay, Cleburne, Cleveland, Conway and 38 more83 min
May 25, 12:28 PM CDTTornado Watch PDSSPCArkansas, Baxter, Bradley, Calhoun, Clark, Clay and 41 more8 hr
May 25, 1:53 PM CDTMesoscale DiscussionSPCBradley, Calhoun, Clark, Columbia, Dallas, Hempstead and 9 more2 hr
May 25, 2:56 PM CDTMesoscale DiscussionSPCArkansas, Calhoun, Clark, Clay, Cleburne, Cleveland and 33 more94 min
May 25, 3:10 PM CDTMesoscale DiscussionSPCClay95 min
May 25, 3:16 PM CDTTornado WatchSPCAshley, Chicot, Columbia, Lafayette, Miller, Nevada and 1 more7 hr
May 25, 5:56 PM CDTMesoscale DiscussionSPCArkansas, Craighead, Crittenden, Cross, Greene, Lee and 5 more64 min
May 25, 1:22 AM CDTTornado WatchSPCAdams, Brown, Calhoun, Cass, Fulton, Greene and 16 more7 hr
May 25, 4:58 AM CDTMesoscale DiscussionSPCBond, Brown, Calhoun, Cass, Champaign, Christian and 45 more92 min
May 25, 5:46 AM CDTTornado WatchSPCBond, Champaign, Christian, Clark, Clay, Clinton and 35 more7 hr
May 25, 7:48 AM CDTMesoscale DiscussionSPCChampaign, Clark, Clay, Clinton, Coles, Crawford and 18 more87 min
May 25, 8:33 AM CDTMesoscale DiscussionSPCChampaign, DeWitt, Douglas, Edgar, Ford, Iroquois and 3 more87 min
May 25, 11:09 AM CDTTornado Watch PDSSPCAlexander, Bond, Calhoun, Christian, Clark, Clay and 41 more10 hr
May 25, 2:31 PM CDTTornado WatchSPCBureau, Cass, Champaign, DeKalb, DeWitt, Ford and 33 more7 hr
May 25, 2:32 PM CDTMesoscale DiscussionSPCCalhoun, Greene, Jersey, Macoupin, Pike, Scott58 min
May 25, 5:48 PM CDTMesoscale DiscussionSPCBureau, Champaign, DeKalb, DeWitt, Douglas, Ford and 19 more117 min
May 25, 6:25 PM CDTMesoscale DiscussionSPCAlexander, Clay, Clinton, Edwards, Franklin, Gallatin and 20 more2 hr
May 25, 8:50 AM CDTTornado WatchSPCAdams, Allen, Bartholomew, Blackford, Boone, Brown and 57 more9 hr
May 25, 12:26 PM CDTMesoscale DiscussionSPCAdams, Allen, Blackford, DeKalb, Delaware, Grant and 16 more94 min
May 25, 12:55 PM CDTTornado WatchSPCDearborn, Fayette, Franklin, Ohio, Ripley, Switzerland and 2 more8 hr
May 25, 5:19 PM CDTMesoscale DiscussionSPCBartholomew, Blackford, Boone, Brown, Clay, Clinton and 45 more86 min
May 25, 5:44 PM CDTTornado Watch PDSSPCAdams, Bartholomew, Blackford, Boone, Brown, Carroll and 45 more6 hr
May 24, 7:07 PM CDTMesoscale DiscussionSPCAndrew, Barton, Bates, Buchanan, Cass, Cedar and 14 more53 min
May 24, 7:26 PM CDTTornado WatchSPCAdair, Barry, Barton, Bates, Benton, Buchanan and 48 more7 hr
May 25, 1:28 PM CDTMesoscale DiscussionSPCAdair, Audrain, Boone, Caldwell, Callaway, Camden and 44 more92 min
May 25, 3:45 PM CDTMesoscale DiscussionSPCBedford, Benton, Cannon, Cheatham, Coffee, Davidson and 24 more90 min

Nearby

Mesoscale Discussions in Kentucky, 2011Mesoscale Discussions in Missouri, 2011Mesoscale Discussions in Illinois, 2011Every mesoscale discussion in 2011

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.