Alert archive / Kentucky / Mesoscale Discussions in 2012
Mesoscale Discussion 182
The Storm Prediction Center issued this mesoscale discussion at Feb 29, 2012, 11:11 AM CST for 4 states. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Feb 29, 2012, 11:11 AM CST (17:11 UTC)
- Expired
- Feb 29, 2012, 1:15 PM CST
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 125 counties
Crittenden County, AR, Mississippi County, AR, Adair County, KY, Allen County, KY, Anderson County, KY, Barren County, KY, Bath County, KY, Bell County, KY, Bourbon County, KY, Boyle County, KY, Breathitt County, KY, Butler County, KY, Calloway County, KY, Casey County, KY, Christian County, KY, Clark County, KY, Clay County, KY, Clinton County, KY, Cumberland County, KY, Edmonson County, KY, Elliott County, KY, Estill County, KY, Fayette County, KY, Garrard County, KY, Grayson County, KY, Green County, KY, Harlan County, KY, Hart County, KY, Jackson County, KY, Jessamine County, KY, Johnson County, KY, Knott County, KY, Knox County, KY, Larue County, KY, Laurel County, KY, Lee County, KY, Leslie County, KY, Letcher County, KY, Lincoln County, KY, Logan County, KY, Madison County, KY, Magoffin County, KY, Marion County, KY, McCreary County, KY, Menifee County, KY, Mercer County, KY, Metcalfe County, KY, Monroe County, KY, Montgomery County, KY, Morgan County, KY, Nelson County, KY, Nicholas County, KY, Owsley County, KY, Perry County, KY, Powell County, KY, Pulaski County, KY, Rockcastle County, KY, Rowan County, KY, Russell County, KY, Simpson County, KY, Taylor County, KY, Todd County, KY, Trigg County, KY, Warren County, KY, Washington County, KY, Wayne County, KY, Whitley County, KY, Wolfe County, KY, Woodford County, KY, Anderson County, TN, Benton County, TN, Campbell County, TN, Cannon County, TN, Carroll County, TN, Cheatham County, TN, Chester County, TN, Claiborne County, TN, Clay County, TN, Crockett County, TN, Cumberland County, TN, Davidson County, TN, Decatur County, TN, DeKalb County, TN, Dickson County, TN, Dyer County, TN, Fayette County, TN, Fentress 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, Jackson County, TN, Lauderdale County, TN, Lewis County, TN, Macon County, TN, Madison County, TN, Maury County, TN, McNairy County, TN, Montgomery County, TN, Morgan County, TN, Overton County, TN, Perry County, TN, Pickett County, TN, Putnam County, TN, Robertson County, TN, Rutherford County, TN, Scott County, TN, Shelby County, TN, Smith County, TN, Stewart County, TN, Sumner County, TN, Tipton County, TN, Trousdale County, TN, Union County, TN, Wayne County, TN, Weakley County, TN, White County, TN, Williamson County, TN, Wilson County, TN, Lee County, VA
The radar
The Nashville radar (KOHX), 54 km from the middle of the area, began a volume at 17:14 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, 5.2 hours before the alert went out and 67 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
- 580 J/kg
- Mixed-layer CIN
- -25 J/kg
- Mixed-layer LCL
- 510 m above ground
- 0-6 km bulk shear
- 61 kt
- 0-1 km storm-relative helicity
- 365 m²/s²
- 0-3 km storm-relative helicity
- 485 m²/s²
- Significant tornado parameter
- 1.9
- Supercell composite
- 8.5
The text
As transmitted, in the capitals the NWS used until 2016.
779
ACUS11 KWNS 291711
SWOMCD
SPC MCD 291711
VAZ000-KYZ000-TNZ000-MSZ000-MOZ000-ARZ000-291915-
MESOSCALE DISCUSSION 0182
NWS STORM PREDICTION CENTER NORMAN OK
1111 AM CST WED FEB 29 2012
AREAS AFFECTED...WRN AND MIDDLE TN INTO CNTRL KY
CONCERNING...SEVERE POTENTIAL...TORNADO WATCH LIKELY
VALID 291711Z - 291915Z
A NEW TORNADO WATCH WILL LIKELY BE ISSUED PRIOR TO 18Z FOR MUCH OF
TN INTO KY.
A LEADING BROKEN LINE OF STORMS CONTINUES TO AFFECT NWRN TN AND MUCH
OF CNTRL KY WHERE SHEAR REMAINS QUITE FAVORABLE FOR WIDESPREAD
DAMAGING WINDS AND A FEW TORNADOES. RECENTLY...NEW DEVELOPMENT WAS
OCCURRING ON THE SWRN END OF THE LINE...WHERE WARM AND MOIST AIR WAS
BEING LIFTED OVER EXISTING OUTFLOW. STRONG SHEAR IS LIKELY TO ACT ON
THIS CONVECTION AS IT CONTINUES EWD OVER MIDDLE TN.
AS THE SURFACE FRONT SHARPENS AND CONTINUES EWD ACROSS THE MS
RIVER...ENHANCED LIFT SHOULD RESULT IN SOME FURTHER REJUVENATION
WITH NEW DEVELOPMENT. OTHER STORMS WILL LIKELY MATERIALIZE WITH TIME
SWWD ALONG THE FRONT INTO SRN AR AND MS...BUT THEY WILL BE FIGHTING
LESS FAVORABLE LAPSE RATES ALOFT WHICH MAY RESULT IN RELATIVELY A
SLOW BUT STEADY RAMP UP OF SEVERE THREAT.
..JEWELL.. 02/29/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...RLX...MRX...JKL...LMK...OHX...PAH...MEG...
LAT...LON 35678597 34868945 34959067 35509063 35829011 36418892
36798809 37758564 38228450 38388386 38308315 37898277
37198272 36698299 36178383 35678597SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 28, 10:30 PM CST | Tornado Watch | SPC | Baxter, Benton, Boone, Carroll, Conway, Crawford and 20 more | 6 hr |
| Feb 28, 11:40 PM CST | Mesoscale Discussion | SPC | Benton | 95 min |
| Feb 29, 12:49 AM CST | Mesoscale Discussion | SPC | Arkansas, Bradley, Calhoun, Chicot, Clay, Cleburne and 31 more | 56 min |
| Feb 29, 3:20 AM CST | Tornado Watch | SPC | Baxter, Clay, Cleburne, Conway, Craighead, Fulton and 20 more | 9 hr |
| Feb 29, 3:53 AM CST | Mesoscale Discussion | SPC | Baxter, Clay, Cleburne, Conway, Craighead, Faulkner and 20 more | 97 min |
| Feb 29, 8:07 AM CST | Mesoscale Discussion | SPC | Clay, Craighead, Greene, Independence, Jackson, Lawrence and 2 more | 53 min |
| Feb 29, 11:46 AM CST | Mesoscale Discussion | SPC | Arkansas, Ashley, Bradley, Calhoun, Chicot, Cleveland and 7 more | 89 min |
| Feb 29, 2:15 PM CST | Severe Thunderstorm Watch | SPC | Ashley, Chicot | 6 hr |
| Feb 29, 1:14 AM CST | Tornado Watch | SPC | Ballard, Caldwell, Calloway, Carlisle, Christian, Crittenden and 16 more | 11 hr |
| Feb 29, 2:40 AM CST | Mesoscale Discussion | SPC | Adair, Allen, Anderson, Barren, Bath, Boone and 63 more | 65 min |
| Feb 29, 4:39 AM CST | Tornado Watch | SPC | Adair, Allen, Anderson, Barren, Bath, Bourbon and 54 more | 7 hr |
| Feb 29, 7:27 AM CST | Tornado Watch | SPC | Boone, Bracken, Campbell, Carroll, Gallatin, Grant and 6 more | 5 hr |
| Feb 29, 7:38 AM CST | Mesoscale Discussion | SPC | Adair, Allen, Anderson, Barren, Bath, Boone and 70 more | 67 min |
| Feb 29, 11:31 AM CST | Tornado Watch | SPC | Adair, Allen, Barren, Bath, Bell, Boyle and 59 more | 8 hr |
| Feb 29, 11:41 AM CST | Mesoscale Discussion | SPC | Boone, Bracken, Campbell, Gallatin, Grant, Kenton and 2 more | 3 hr |
| Feb 29, 12:24 PM CST | Mesoscale Discussion | SPC | Boyd, Greenup, Lawrence | 36 min |
| Feb 29, 12:37 PM CST | Tornado Watch | SPC | Boyd, Carter, Greenup, Lawrence, Lewis, Mason | 7 hr |
| Feb 29, 3:18 PM CST | Mesoscale Discussion | SPC | Boyd, Carter, Greenup, Lawrence, Lewis | 87 min |
| Feb 29, 3:34 PM CST | Mesoscale Discussion | SPC | Adair, Allen, Barren, Bath, Bell, Boyle and 48 more | 116 min |
| Feb 29, 1:48 PM CST | Tornado Watch | SPC | Franklin, Lincoln, Moore | 7 hr |
| Feb 29, 2:23 PM CST | Mesoscale Discussion | SPC | Johnson | 67 min |
| Feb 29, 4:36 PM CST | Mesoscale Discussion | SPC | Blount, Bradley, Carter, Cocke, Greene, Hamilton and 6 more | 54 min |
| Feb 29, 5:37 PM CST | Tornado Watch | SPC | Blount, Bradley, Carter, Cocke, Greene, Hamilton and 10 more | 3 hr |
| Feb 29, 2:43 PM CST | Tornado Watch | SPC | Alleghany, Bath, Bedford, Bland, Botetourt, Carroll and 22 more | 5 hr |
Nearby
Mesoscale Discussions in Kentucky, 2012Mesoscale Discussions in Tennessee, 2012Mesoscale Discussions in Arkansas, 2012Every mesoscale discussion in 2012
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.