Alert archive / Kentucky / Mesoscale Discussions in 2011
Mesoscale Discussion 983
The Storm Prediction Center issued this mesoscale discussion at May 26, 2011, 2:09 PM CDT for 55 counties in Kentucky; 25 counties in Ohio; 7 counties in Tennessee. It was in force for 96 min.
The area
The outline as issued.
The facts
- Issued
- May 26, 2011, 2:09 PM CDT (19:09 UTC)
- Expired
- May 26, 2011, 3:45 PM CDT
- In force
- 96 min
- Issued by
- the Storm Prediction Center
All 87 counties
Adair County, KY, Anderson County, KY, Bath County, KY, Bourbon County, KY, Boyle County, KY, Bracken County, KY, Campbell County, KY, Carter County, KY, Casey County, KY, Clark County, KY, Clinton County, KY, Cumberland County, KY, Elliott County, KY, Estill County, KY, Fayette County, KY, Fleming County, KY, Franklin County, KY, Garrard County, KY, Grant County, KY, Greenup County, KY, Harrison County, KY, Jackson County, KY, Jessamine County, KY, Kenton County, KY, Laurel County, KY, Lee County, KY, Lewis County, KY, Lincoln County, KY, Madison County, KY, Marion County, KY, Mason County, KY, McCreary County, KY, Menifee County, KY, Mercer County, KY, Metcalfe County, KY, Monroe County, KY, Montgomery County, KY, Morgan County, KY, Nicholas County, KY, Owen County, KY, Owsley County, KY, Pendleton County, KY, Powell County, KY, Pulaski County, KY, Robertson County, KY, Rockcastle County, KY, Rowan County, KY, Russell County, KY, Scott County, KY, Taylor County, KY, Washington County, KY, Wayne County, KY, Whitley County, KY, Wolfe County, KY, Woodford County, KY, Adams County, OH, Brown County, OH, Champaign County, OH, Clark County, OH, Clermont County, OH, Clinton County, OH, Delaware County, OH, Fairfield County, OH, Fayette County, OH, Franklin County, OH, Greene County, OH, Hamilton County, OH, Highland County, OH, Hocking County, OH, Jackson County, OH, Licking County, OH, Madison County, OH, Perry County, OH, Pickaway County, OH, Pike County, OH, Ross County, OH, Scioto County, OH, Union County, OH, Vinton County, OH, Warren County, OH, Clay County, TN, Fentress County, TN, Jackson County, TN, Overton County, TN, Pickett County, TN, Scott County, TN, Smith County, TN
The radar
The Jackson,KY radar (KJKL), 103 km from the middle of the area, began a volume at 19:10 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
Cncnati-Daytn, OH (KILN), launched 12:00Z, 7.2 hours before the alert went out and 120 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.
- Mixed-layer CAPE
- 1 J/kg
- Mixed-layer CIN
- -11 J/kg
- Mixed-layer LCL
- 645 m above ground
- 0-6 km bulk shear
- 55 kt
- 0-1 km storm-relative helicity
- 202 m²/s²
- 0-3 km storm-relative helicity
- 240 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
060
ACUS11 KWNS 261910
SWOMCD
SPC MCD 261909
OHZ000-KYZ000-TNZ000-262045-
MESOSCALE DISCUSSION 0983
NWS STORM PREDICTION CENTER NORMAN OK
0209 PM CDT THU MAY 26 2011
AREAS AFFECTED...SRN OH...CNTRL/ERN KY...MIDDLE TN
CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE
VALID 261909Z - 262045Z
BROKEN LINE OF TSTMS ALONG COLD FRONT FROM SWRN OH TO NRN MIDDLE TN
MAY INTENSIFY THIS AFTERNOON AND POSE A RISK OF ISOLATED DAMAGING
WINDS AND MARGINAL HAIL. THE PROBABILITY OF A SEVERE TSTM WATCH
ISSUANCE BY 21Z IS 40 PERCENT.
A GRADUAL INCREASE IN REFLECTIVITY/LIGHTNING TRENDS HAS BEEN NOTED
DURING THE PAST HOUR WITH A BROKEN LINE OF TSTMS THAT STRETCHED
ALONG A COLD FRONT FROM GREENE COUNTY OH TO MACON COUNTY TN AS OF
19Z. DOWNSTREAM HEATING HAS BEEN RETARDED BY LARGELY BROKEN CLOUD
COVERAGE...RESULTING IN ONLY A WEAKLY UNSTABLE AIR MASS WITH MLCAPE
AOB 1000 J/KG. NEVERTHELESS...GIVEN THE DEGREE OF FORCING FOR ASCENT
ASSOCIATED WITH THE SHORT WAVE TROUGH OVER IL/IND...A NARROW-BANDED
QLCS ALONG THE FRONT MAY ULTIMATELY EVOLVE E/NEWD. HOWEVER...THIS
ACTIVITY WILL LIKELY REMAIN ON THE WRN FRINGE OF STRONGER DEEP-LAYER
S/SWLYS...WHICH ARE ALSO NEARLY PARALLEL TO THE INITIATING BOUNDARY.
THIS COMBINED WITH THE MARGINALLY FAVORABLE THERMODYNAMIC
ENVIRONMENT SHOULD SERVE TO LIMIT A MORE ROBUST WIND DAMAGE THREAT.
..GRAMS.. 05/26/2011
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...PBZ...RLX...CLE...MRX...JKL...ILN...LMK...OHX...
LAT...LON 36128487 36238610 36448605 37598532 39958419 40258369
40408302 40318243 40148212 39908215 38698257 36518425
36128487SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 25, 7:14 PM CDT | Mesoscale Discussion | SPC | Boone, Bourbon, Bracken, Campbell, Carroll, Fleming and 15 more | 2 hr |
| May 25, 7:40 PM CDT | Mesoscale Discussion | SPC | Breckinridge, Butler, Caldwell, Calloway, Christian, Crittenden and 25 more | 2 hr |
| May 25, 8:33 PM CDT | Tornado Watch | SPC | Adair, Allen, Anderson, Barren, Boone, Bourbon and 65 more | 7 hr |
| May 26, 12:15 PM CDT | Mesoscale Discussion | SPC | Letcher, Pike | 90 min |
| May 26, 3:30 PM CDT | Mesoscale Discussion | SPC | Pike | 60 min |
| May 25, 11:23 PM CDT | Mesoscale Discussion | SPC | Mercer, Van Wert | 2 hr |
| May 26, 1:37 AM CDT | Mesoscale Discussion | SPC | Ashland, Ashtabula, Carroll, Columbiana, Coshocton, Crawford and 27 more | 83 min |
| May 26, 5:06 PM CDT | Severe Thunderstorm Watch | SPC | Ashtabula, Belmont, Carroll, Columbiana, Coshocton, Cuyahoga and 17 more | 6 hr |
| May 25, 7:22 PM CDT | Mesoscale Discussion | SPC | Benton, Carroll, Chester, Crockett, Decatur, Dyer and 18 more | 53 min |
| May 26, 7:56 AM CDT | Mesoscale Discussion | SPC | Bledsoe, Bradley, Franklin, Grundy, Hamilton, Lincoln and 8 more | 94 min |
| May 26, 9:15 AM CDT | Severe Thunderstorm Watch | SPC | Anderson, Bledsoe, Blount, Bradley, Campbell, Carter and 30 more | 9 hr |
| May 26, 12:22 PM CDT | Mesoscale Discussion | SPC | Bradley, Hamilton, McMinn, Marion, Meigs, Monroe and 1 more | 83 min |
| May 26, 2:32 PM CDT | Mesoscale Discussion | SPC | Carter, Cocke, Greene, Hamblen, Jefferson, Sevier and 3 more | 58 min |
| May 26, 3:36 PM CDT | Mesoscale Discussion | SPC | Carter, Cocke, Greene, Hawkins, Johnson, Sullivan and 2 more | 84 min |
| May 26, 4:10 PM CDT | Severe Thunderstorm Watch | SPC | Anderson, Bledsoe, Blount, Bradley, Campbell, Carter and 27 more | 7 hr |
Nearby
Mesoscale Discussions in Kentucky, 2011Mesoscale Discussions in Ohio, 2011Mesoscale Discussions in Tennessee, 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.