Alert archive / Kentucky / Mesoscale Discussions in 2012
Mesoscale Discussion 148
The Storm Prediction Center issued this mesoscale discussion at Feb 23, 2012, 9:46 PM CST for 42 counties in Kentucky; 11 counties in Tennessee. It was in force for 89 min.
The area
The outline as issued.
The facts
- Issued
- Feb 23, 2012, 9:46 PM CST (03:46 UTC)
- Expired
- Feb 23, 2012, 11:15 PM CST
- In force
- 89 min
- Issued by
- the Storm Prediction Center
All 53 counties
Adair County, KY, Allen County, KY, Anderson County, KY, Barren County, KY, Boyle County, KY, Breckinridge County, KY, Bullitt County, KY, Butler County, KY, Casey County, KY, Clinton County, KY, Cumberland County, KY, Edmonson County, KY, Fayette County, KY, Franklin County, KY, Garrard County, KY, Grayson County, KY, Green County, KY, Hardin County, KY, Hart County, KY, Jefferson County, KY, Jessamine County, KY, Larue County, KY, Lincoln County, KY, Logan County, KY, Madison County, KY, Marion County, KY, Meade County, KY, Mercer County, KY, Metcalfe County, KY, Monroe County, KY, Nelson County, KY, Pulaski County, KY, Russell County, KY, Shelby County, KY, Simpson County, KY, Spencer County, KY, Taylor County, KY, Todd County, KY, Warren County, KY, Washington County, KY, Wayne County, KY, Woodford County, KY, Cheatham County, TN, Clay County, TN, Jackson County, TN, Macon County, TN, Overton County, TN, Pickett County, TN, Robertson County, TN, Smith County, TN, Sumner County, TN, Trousdale County, TN, Wilson County, TN
The radar
The Louisville radar (KLVX), 87 km from the middle of the area, began a volume at 03:47 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 nearest sounding before it
Nashville Metro, TN (KBNA), launched 00:00Z, 3.8 hours before the alert went out and 129 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
- 18 J/kg
- Mixed-layer CIN
- -30 J/kg
- Mixed-layer LCL
- 2239 m above ground
- 0-6 km bulk shear
- 69 kt
- 0-1 km storm-relative helicity
- 263 m²/s²
- 0-3 km storm-relative helicity
- 471 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
639
ACUS11 KWNS 240346
SWOMCD
SPC MCD 240346
KYZ000-TNZ000-INZ000-240515-
MESOSCALE DISCUSSION 0148
NWS STORM PREDICTION CENTER NORMAN OK
0946 PM CST THU FEB 23 2012
AREAS AFFECTED...CNTRL-SRN KY/NRN TN
CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY
VALID 240346Z - 240515Z
A SEVERE THREAT MAY DEVELOP ACROSS CNTRL-SRN KY AND NRN TN OVER THE
NEXT FEW HOURS. WIND DAMAGE AND HAIL SHOULD BE THE MAIN THREATS.
ALTHOUGH WW ISSUANCE CAN NOT BE RULED OUT...A WATCH WILL PROBABLY
NOT BE NECESSARY.
THUNDERSTORMS ARE INCREASING IN INTENSITY ALONG A LING FROM NEAR
LOUISVILLE SSWWD TO NEAR HOPKINSVILLE JUST TO THE SOUTHEAST OF A 994
MB SFC LOW. THE ACTIVITY IS LOCATED ON THE NRN EDGE OF A POCKET OF
MODERATE INSTABILITY ACROSS WCNTRL KY WHERE MESOANALYSIS SHOWS
MUCAPE VALUES JUST ABOVE 1000 J/KG. THIS COMBINED WITH STRONG DEEP
LAYER SHEAR /0-6 KM SHEAR OF 70 TO 80 KT/ SHOULD SUPPORT AN ISOLATED
SEVERE THREAT WITH THE STRONGER THUNDERSTORMS. MESOANALYSIS SUGGESTS
THAT MID-LEVEL LAPSE RATES ARE NOT THAT STEEP WHICH WILL LIKELY KEEP
THE HAIL THREAT MARGINAL. WIND DAMAGE SHOULD ALSO REMAIN ISOLATED
WITH THE GREATEST POTENTIAL ASSOCIATED WITH SHORT LINE-SEGMENTS
ASSUMING THE CELLS CAN BECOME MORE CONCENTRATED.
..BROYLES.. 02/24/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...JKL...ILN...LMK...OHX...PAH...
LAT...LON 36218708 36078586 36318520 37748408 38188421 38378493
38348579 37918631 37608660 37248691 36908723 36528735
36218708SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 23, 6:28 PM CST | Mesoscale Discussion | SPC | Anderson, Bath, Boone, Bourbon, Bracken, Campbell and 33 more | 92 min |
| Feb 24, 1:00 AM CST | Mesoscale Discussion | SPC | Bell, Breathitt, Clay, Elliott, Floyd, Harlan and 20 more | 2 hr |
| Feb 24, 8:05 AM CST | Mesoscale Discussion | SPC | Blount, Carter, Cocke, Grainger, Greene, Hamblen and 9 more | 25 min |
| Feb 24, 11:00 AM CST | Mesoscale Discussion | SPC | Carter, Cocke, Greene, Johnson, Sullivan, Unicoi and 1 more | 60 min |
| Feb 24, 2:24 PM CST | Mesoscale Discussion | SPC | Carter, Cocke, Greene, Johnson, Sullivan, Unicoi and 1 more | 66 min |
Nearby
Mesoscale Discussions in Kentucky, 2012Mesoscale Discussions in Tennessee, 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.