Alert archive / Kentucky / Mesoscale Discussions in 2012
Mesoscale Discussion 211
The Storm Prediction Center issued this mesoscale discussion at Mar 2, 2012, 12:05 PM CST for 5 states. It was in force for 85 min.
The area
The outline as issued.
The facts
- Issued
- Mar 2, 2012, 12:05 PM CST (18:05 UTC)
- Expired
- Mar 2, 2012, 1:30 PM CST
- In force
- 85 min
- Issued by
- the Storm Prediction Center
All 145 counties
Gallatin County, IL, Hardin County, IL, Johnson County, IL, Massac County, IL, Pope County, IL, Saline County, IL, Wabash County, IL, White County, IL, Bartholomew County, IN, Brown County, IN, Clark County, IN, Crawford County, IN, Daviess County, IN, Dearborn County, IN, Decatur County, IN, Dubois County, IN, Floyd County, IN, Franklin County, IN, Gibson County, IN, Harrison County, IN, Jackson County, IN, Jefferson County, IN, Jennings County, IN, Knox County, IN, Lawrence County, IN, Martin County, IN, Monroe County, IN, Ohio County, IN, Orange County, IN, Perry County, IN, Pike County, IN, Posey County, IN, Ripley County, IN, Rush County, IN, Scott County, IN, Shelby County, IN, Spencer County, IN, Switzerland County, IN, Vanderburgh County, IN, Warrick County, IN, Washington County, IN, Adair County, KY, Allen County, KY, Anderson County, KY, Ballard County, KY, Barren County, KY, Boone County, KY, Boyle County, KY, Breckinridge County, KY, Bullitt County, KY, Butler County, KY, Caldwell County, KY, Calloway County, KY, Campbell County, KY, Carlisle County, KY, Carroll County, KY, Casey County, KY, Christian County, KY, Crittenden County, KY, Daviess County, KY, Edmonson County, KY, Fayette County, KY, Franklin County, KY, Gallatin County, KY, Grant County, KY, Graves County, KY, Grayson County, KY, Green County, KY, Hancock County, KY, Hardin County, KY, Harrison County, KY, Hart County, KY, Henderson County, KY, Henry County, KY, Hickman County, KY, Hopkins County, KY, Jefferson County, KY, Jessamine County, KY, Kenton County, KY, Larue County, KY, Livingston County, KY, Logan County, KY, Lyon County, KY, Marion County, KY, Marshall County, KY, McCracken County, KY, McLean County, KY, Meade County, KY, Mercer County, KY, Metcalfe County, KY, Monroe County, KY, Muhlenberg County, KY, Nelson County, KY, Ohio County, KY, Oldham County, KY, Owen County, KY, Pendleton County, KY, Scott County, KY, Shelby County, KY, Simpson County, KY, Spencer County, KY, Taylor County, KY, Todd County, KY, Trigg County, KY, Trimble County, KY, Union County, KY, Warren County, KY, Washington County, KY, Webster County, KY, Woodford County, KY, Hamilton County, OH, Benton County, TN, Carroll County, TN, Cheatham County, TN, Chester County, TN, Crockett County, TN, Davidson County, TN, Decatur County, TN, Dickson County, TN, Dyer 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, Lewis County, TN, Macon County, TN, Madison County, TN, Maury County, TN, McNairy County, TN, Montgomery County, TN, Obion County, TN, Perry County, TN, Robertson County, TN, Stewart County, TN, Sumner County, TN, Trousdale County, TN, Wayne County, TN, Weakley County, TN, Williamson County, TN, Wilson County, TN
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, 6.1 hours before the alert went out and 139 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
- 1667 J/kg
- Mixed-layer CIN
- -25 J/kg
- Mixed-layer LCL
- 523 m above ground
- 0-6 km bulk shear
- 68 kt
- 0-1 km storm-relative helicity
- 175 m²/s²
- 0-3 km storm-relative helicity
- 169 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 6.1
The text
As transmitted, in the capitals the NWS used until 2016.
267
ACUS11 KWNS 021805
SWOMCD
SPC MCD 021805
KYZ000-OHZ000-INZ000-TNZ000-ILZ000-021930-
MESOSCALE DISCUSSION 0211
NWS STORM PREDICTION CENTER NORMAN OK
1205 PM CST FRI MAR 02 2012
AREAS AFFECTED...SRN IL...SRN IND...WRN AND CNTRL KY
CONCERNING...TORNADO WATCH 57...
VALID 021805Z - 021930Z
THE SEVERE WEATHER THREAT FOR TORNADO WATCH 57 CONTINUES.
LONG LIVED SUPERCELLS WILL BEGIN OVERSPREADING A LARGE PORTION OF
THE LOWER OHIO VALLEY BETWEEN NOW AND 20-21Z...ACCOMPANIED BY THE
POTENTIAL FOR STRONG/DESTRUCTIVE TORNADOES AND VERY LARGE HAIL.
ADDITIONAL WWS ARE IN THE PROCESS OF BEING ISSUED AND WILL LIKELY BE
NEEDED WITHIN THE NEXT HOUR OR TWO.
DISCRETE SUPERCELLS HAVE FORMED ACROSS SOUTHERN ILLINOIS INTO
SOUTHEAST MISSOURI...GENERALLY NEAR A DEVELOPING DRY LINE AND JUST
AHEAD OF THE SURFACE COLD FRONT...WHICH WILL CONTINUE OVERTAKING THE
DRY LINE ACROSS THE LOWER OHIO VALLEY DURING THE NEXT FEW HOURS.
ADDITIONAL CELLS STILL APPEAR LIKELY TO FORM AHEAD OF THE EASTWARD
ADVANCING FRONT...INITIATING ALONG THE PRE-FRONTAL DRY LINE
STRUCTURE ACROSS PARTS OF WESTERN AND CENTRAL KENTUCKY INTO WESTERN
AND MIDDLE TENNESSEE THROUGH 20-21Z. IN THE PRESENCE OF STRONG
SHEAR...WITH LARGE CLOCKWISE CURVED LOW-LEVEL HODOGRAPHS...AND
MODERATELY LARGE CAPE...CONDITIONS APPEAR VERY FAVORABLE FOR
SUPERCELLS CAPABLE OF PRODUCING TORNADOES...SOME PARTICULARLY STRONG
AND POTENTIALLY VERY DESTRUCTIVE. GIVEN THE STRENGTH OF THE
WESTERLY DEEP LAYER MEAN FLOW /50-60+ KT/...AND THE CONTINUING
EASTWARD ADVECTION OF THE UNSTABLE WARM SECTOR THROUGH THE LOWER
OHIO VALLEY...STORMS WILL BE FAST MOVING AND LONG-LIVED.
..KERR.. 03/02/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...ILN...LMK...OHX...IND...PAH...ILX...MEG...
LAT...LON 37878887 38568777 39778560 38988407 37758450 36158607
35158758 35128922 35448973 36598911 37878887SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 2, 1:46 AM CST | Mesoscale Discussion | SPC | Jackson, Monroe, Perry, Randolph, Saint Clair | 89 min |
| Mar 2, 2:07 AM CST | Severe Thunderstorm Watch | SPC | Calhoun, Jersey, Madison, Monroe, Randolph, Saint Clair | 5 hr |
| Mar 2, 4:25 AM CST | Mesoscale Discussion | SPC | Bond, Calhoun, Christian, Clark, Clay, Clinton and 30 more | 95 min |
| Mar 2, 5:52 AM CST | Severe Thunderstorm Watch | SPC | Bond, Calhoun, Champaign, Christian, Clark, Clay and 29 more | 6 hr |
| Mar 2, 7:50 AM CST | Mesoscale Discussion | SPC | Clark, Clay, Coles, Crawford, Cumberland, Douglas and 12 more | 85 min |
| Mar 2, 9:22 AM CST | Mesoscale Discussion | SPC | Alexander, Crawford, Edwards, Franklin, Gallatin, Hamilton and 13 more | 113 min |
| Mar 2, 9:54 AM CST | Tornado Watch | SPC | Alexander, Bond, Champaign, Christian, Clark, Clay and 41 more | 6 hr |
| Mar 2, 10:02 AM CST | Mesoscale Discussion | SPC | Champaign, Clark, Coles, Crawford, Cumberland, Douglas and 3 more | 88 min |
| Mar 2, 11:06 AM CST | Mesoscale Discussion | SPC | Boone, Carroll, Hancock, Henderson, Henry, Jo Daviess and 9 more | 4 hr |
| Mar 2, 3:40 AM CST | Mesoscale Discussion | SPC | Crawford, Dubois, Harrison, Perry, Pike, Spencer and 1 more | 65 min |
| Mar 2, 10:30 AM CST | Mesoscale Discussion | SPC | Adams, Blackford, Dearborn, Delaware, Fayette, Franklin and 7 more | 90 min |
| Mar 2, 12:02 PM CST | Tornado Watch | SPC | Bartholomew, Brown, Clark, Crawford, Dearborn, Decatur and 25 more | 8 hr |
| Mar 2, 2:35 PM CST | Mesoscale Discussion | SPC | Clark, Dearborn, Floyd, Franklin, Harrison, Jefferson and 4 more | 85 min |
| Mar 2, 11:46 AM CST | Mesoscale Discussion | SPC | Bell, McCreary, Whitley | 29 min |
| Mar 2, 3:19 PM CST | Tornado Watch | SPC | Bell, Boyd, Breathitt, Carter, Clay, Elliott and 18 more | 6 hr |
| Mar 2, 5:13 PM CST | Mesoscale Discussion | SPC | Bath, Boyd, Breathitt, Carter, Clark, Clay and 30 more | 62 min |
| Mar 2, 2:30 AM CST | Mesoscale Discussion | SPC | Bradley, McMinn, Monroe, Polk | 90 min |
| Mar 2, 9:07 AM CST | Mesoscale Discussion | SPC | Bedford, Bledsoe, Bradley, Cannon, Coffee, Cumberland and 28 more | 53 min |
| Mar 2, 9:25 AM CST | Tornado Watch | SPC | Anderson, Bedford, Bledsoe, Blount, Bradley, Campbell and 46 more | 5 hr |
| Mar 2, 10:28 AM CST | Mesoscale Discussion | SPC | Crockett, Dyer, Fayette, Gibson, Haywood, Lake and 5 more | 62 min |
| Mar 2, 1:20 PM CST | Tornado Watch | SPC | Bedford, Benton, Cannon, Carroll, Cheatham, Chester and 50 more | 9 hr |
| Mar 2, 1:58 PM CST | Mesoscale Discussion | SPC | Anderson, Blount, Bradley, Campbell, Claiborne, Cocke and 21 more | 62 min |
| Mar 2, 2:19 PM CST | Tornado Watch | SPC | Anderson, Bledsoe, Blount, Bradley, Campbell, Carter and 27 more | 8 hr |
| Mar 2, 3:25 PM CST | Mesoscale Discussion | SPC | Bedford, Benton, Cannon, Carroll, Cheatham, Chester and 44 more | 65 min |
| Mar 2, 5:41 PM CST | Mesoscale Discussion | SPC | Bradley, Polk | 2 hr |
Nearby
Mesoscale Discussions in Kentucky, 2012Mesoscale Discussions in Tennessee, 2012Mesoscale Discussions in Indiana, 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.