Alert archive / Kentucky / Mesoscale Discussions in 2011

Mesoscale Discussion 968

May 25, 20115 states

The Storm Prediction Center issued this mesoscale discussion at May 25, 2011, 6:25 PM CDT for 5 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: May 25, 2011, 6:25 PM CDT (23:25 UTC)
Expired: May 25, 2011, 8:30 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

All 96 counties

Alexander County, IL, Clay County, IL, Clinton County, IL, Edwards County, IL, Franklin County, IL, Gallatin County, IL, Hamilton County, IL, Hardin County, IL, Jackson County, IL, Jefferson County, IL, Johnson County, IL, Lawrence County, IL, Marion County, IL, Massac County, IL, Perry County, IL, Pope County, IL, Pulaski County, IL, Randolph County, IL, Richland County, IL, Saline County, IL, Union County, IL, Wabash County, IL, Washington County, IL, Wayne County, IL, White County, IL, Williamson County, IL, Clark County, IN, Crawford County, IN, Daviess County, IN, Dubois County, IN, Floyd County, IN, Gibson County, IN, Harrison County, IN, Knox County, IN, Martin County, IN, Orange County, IN, Perry County, IN, Pike County, IN, Posey County, IN, Scott County, IN, Spencer County, IN, Vanderburgh County, IN, Warrick County, IN, Washington County, IN, Allen County, KY, Ballard County, KY, Barren County, KY, Breckinridge County, KY, Bullitt 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, Graves County, KY, Grayson County, KY, Green County, KY, Hancock County, KY, Hardin County, KY, Hart County, KY, Henderson County, KY, Hickman County, KY, Hopkins County, KY, Jefferson County, KY, Larue 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, Nelson County, KY, Ohio County, KY, Oldham 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, Mississippi County, MO, Perry County, MO, Scott County, MO, Stoddard County, MO, Wayne County, MO, Clay County, TN

The radar

The Evansville,IN radar (KVWX), 83 km from the middle of the area, began a volume at 23:27 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.

Tornado Watch 376May 25, 8:35 PM CDT

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 11.4 hours before the alert went out and 188 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: 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.

974 
ACUS11 KWNS 252325
SWOMCD
SPC MCD 252325 
KYZ000-INZ000-TNZ000-ILZ000-MOZ000-260130-

MESOSCALE DISCUSSION 0968
NWS STORM PREDICTION CENTER NORMAN OK
0625 PM CDT WED MAY 25 2011

AREAS AFFECTED...SERN MO...SRN IL...SRNIND...CNTRL AND WRN KY

CONCERNING...TORNADO WATCH 370...

VALID 252325Z - 260130Z

THE SEVERE WEATHER THREAT FOR TORNADO WATCH 370 CONTINUES.

THE THREAT FOR STRONG TORNADOES AND DAMAGING WINDS PERSISTS ACROSS
THE ENTIRE AREA.

RADAR TRENDS INDICATE STORMS BEGINNING TO CONGEAL INTO A LINEAR MCS
FROM S CNTRL IL INTO ERN MO. HOWEVER...NUMEROUS SUPERCELLS EXIST
AHEAD OF THIS LINE...AND WILL HAVE THE GREATEST POTENTIAL TO PRODUCE
TORNADOES. ADDITIONAL CELLS MAY DEVELOP AT ANY TIME AHEAD OF THE
LINE AS THE WARM SECTOR IS UNCAPPED WITH UPPER 60S F DEWPOINTS.

EVEN IF THE LINEAR MCS OVERTAKES SUPERCELLS AHEAD OF
IT...PARTICULARLY DAMAGING WINDS...POSSIBLY WIDESPREAD...MAY OCCUR
ALONG WITH EMBEDDED TORNADOES AT TIMES.

..JEWELL.. 05/25/2011

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...LMK...OHX...IND...PAH...ILX...LSX...

LAT...LON   36548545 36669097 37809004 38848956 38728543 36548545

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 25, 12:48 AM CDT	Mesoscale Discussion	SPC	Adams, Alexander, Bond, Brown, Calhoun, Cass and 23 more	57 min
May 25, 1:22 AM CDT	Tornado Watch	SPC	Adams, Brown, Calhoun, Cass, Fulton, Greene and 16 more	7 hr
May 25, 4:58 AM CDT	Mesoscale Discussion	SPC	Bond, Brown, Calhoun, Cass, Champaign, Christian and 45 more	92 min
May 25, 5:46 AM CDT	Tornado Watch	SPC	Bond, Champaign, Christian, Clark, Clay, Clinton and 35 more	7 hr
May 25, 7:31 AM CDT	Mesoscale Discussion	SPC	Alexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 13 more	59 min
May 25, 7:48 AM CDT	Mesoscale Discussion	SPC	Champaign, Clark, Clay, Clinton, Coles, Crawford and 18 more	87 min
May 25, 8:33 AM CDT	Mesoscale Discussion	SPC	Champaign, DeWitt, Douglas, Edgar, Ford, Iroquois and 3 more	87 min
May 25, 10:18 AM CDT	Mesoscale Discussion	SPC	Bond, Clark, Clay, Clinton, Crawford, Cumberland and 12 more	57 min
May 25, 10:37 AM CDT	Tornado Watch	SPC	Adams, Brown, Pike	7 hr
May 25, 11:02 AM CDT	Mesoscale Discussion	SPC	Alexander, Franklin, Gallatin, Hamilton, Hardin, Jackson and 13 more	28 min
May 25, 11:09 AM CDT	Tornado Watch PDS	SPC	Alexander, Bond, Calhoun, Christian, Clark, Clay and 41 more	10 hr
May 25, 2:31 PM CDT	Tornado Watch	SPC	Bureau, Cass, Champaign, DeKalb, DeWitt, Ford and 33 more	7 hr
May 25, 2:32 PM CDT	Mesoscale Discussion	SPC	Calhoun, Greene, Jersey, Macoupin, Pike, Scott	58 min
May 25, 3:10 PM CDT	Mesoscale Discussion	SPC	Alexander, Franklin, Gallatin, Hardin, Jackson, Johnson and 6 more	95 min
May 25, 5:48 PM CDT	Mesoscale Discussion	SPC	Bureau, Champaign, DeKalb, DeWitt, Douglas, Ford and 19 more	117 min
May 25, 8:50 AM CDT	Tornado Watch	SPC	Adams, Allen, Bartholomew, Blackford, Boone, Brown and 57 more	9 hr
May 25, 12:26 PM CDT	Mesoscale Discussion	SPC	Adams, Allen, Blackford, DeKalb, Delaware, Grant and 16 more	94 min
May 25, 12:55 PM CDT	Tornado Watch	SPC	Dearborn, Fayette, Franklin, Ohio, Ripley, Switzerland and 2 more	8 hr
May 25, 5:19 PM CDT	Mesoscale Discussion	SPC	Bartholomew, Blackford, Boone, Brown, Clay, Clinton and 45 more	86 min
May 25, 5:44 PM CDT	Tornado Watch PDS	SPC	Adams, Bartholomew, Blackford, Boone, Brown, Carroll and 45 more	6 hr
May 24, 7:07 PM CDT	Mesoscale Discussion	SPC	Andrew, Barton, Bates, Buchanan, Cass, Cedar and 14 more	53 min
May 24, 7:26 PM CDT	Tornado Watch	SPC	Adair, Barry, Barton, Bates, Benton, Buchanan and 48 more	7 hr
May 24, 7:42 PM CDT	Mesoscale Discussion	SPC	McDonald	63 min
May 24, 11:24 PM CDT	Mesoscale Discussion	SPC	Benton, Camden, Christian, Cooper, Dallas, Douglas and 15 more	96 min
May 25, 9:54 AM CDT	Mesoscale Discussion	SPC	Benton, Butler, Camden, Carter, Christian, Dallas and 24 more	96 min
May 25, 11:52 AM CDT	Mesoscale Discussion	SPC	Dunklin, Pemiscot	83 min
May 25, 12:28 PM CDT	Tornado Watch PDS	SPC	Dunklin, Pemiscot	8 hr
May 25, 1:28 PM CDT	Mesoscale Discussion	SPC	Adair, Audrain, Boone, Caldwell, Callaway, Camden and 44 more	92 min
May 25, 2:56 PM CDT	Mesoscale Discussion	SPC	Dunklin, Pemiscot	94 min
May 25, 5:56 PM CDT	Mesoscale Discussion	SPC	Dunklin, Pemiscot	64 min
May 25, 3:45 PM CDT	Mesoscale Discussion	SPC	Bedford, Benton, Cannon, Cheatham, Coffee, Davidson and 24 more	90 min

Nearby

Mesoscale Discussions in Kentucky, 2011 Mesoscale Discussions in Illinois, 2011 Mesoscale Discussions in Indiana, 2011 Every 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.