Alert archive / Kentucky / Mesoscale Discussions in 2012
Mesoscale Discussion 338
The Storm Prediction Center issued this mesoscale discussion at Mar 23, 2012, 6:08 PM EDT for 31 counties in Indiana; 38 counties in Kentucky. It was in force for 37 min.
The area
The outline as issued.
The facts
- Issued
- Mar 23, 2012, 6:08 PM EDT (22:08 UTC)
- Expired
- Mar 23, 2012, 6:45 PM EDT
- In force
- 37 min
- Issued by
- the Storm Prediction Center
All 69 counties
Bartholomew County, IN, Brown County, IN, Clark County, IN, Crawford County, IN, Dearborn County, IN, Decatur County, IN, Fayette County, IN, Floyd County, IN, Franklin County, IN, Hancock County, IN, Harrison County, IN, Hendricks County, IN, Jackson County, IN, Jefferson County, IN, Jennings County, IN, Johnson County, IN, Lawrence County, IN, Marion County, IN, Monroe County, IN, Morgan County, IN, Ohio County, IN, Orange County, IN, Perry County, IN, Ripley County, IN, Rush County, IN, Scott County, IN, Shelby County, IN, Switzerland County, IN, Union County, IN, Washington County, IN, Wayne County, IN, Adair County, KY, Allen County, KY, Anderson County, KY, Barren County, KY, Breckinridge County, KY, Bullitt County, KY, Butler County, KY, Carroll County, KY, Clinton County, KY, Cumberland County, KY, Edmonson County, KY, Franklin County, KY, Gallatin County, KY, Grayson County, KY, Green County, KY, Hancock County, KY, Hardin County, KY, Hart County, KY, Henry County, KY, Jefferson County, KY, Larue County, KY, Logan County, KY, Marion County, KY, Meade County, KY, Metcalfe County, KY, Monroe County, KY, Nelson County, KY, Ohio County, KY, Oldham County, KY, Owen County, KY, Russell County, KY, Shelby County, KY, Simpson County, KY, Spencer County, KY, Taylor County, KY, Trimble County, KY, Warren County, KY, Washington County, KY
The radar
The Louisville radar (KLVX), 52 km from the middle of the area, began a volume at 22:10 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, 10.1 hours before the alert went out and 210 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
- 233 J/kg
- Mixed-layer CIN
- -53 J/kg
- Mixed-layer LCL
- 1093 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 3 m²/s²
- 0-3 km storm-relative helicity
- 82 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
723
ACUS11 KWNS 232208
SWOMCD
SPC MCD 232208
KYZ000-INZ000-TNZ000-232245-
MESOSCALE DISCUSSION 0338
NWS STORM PREDICTION CENTER NORMAN OK
0508 PM CDT FRI MAR 23 2012
AREAS AFFECTED...PARTS OF CENTRAL/SRN IND AND WRN/CENTRAL KY
CONCERNING...SEVERE POTENTIAL...TORNADO WATCH LIKELY
VALID 232208Z - 232245Z
A TORNADO WATCH WILL BE COORDINATED SHORTLY WITH AFFECTED WFOS FROM
PARTS OF CENTRAL/SRN IND INTO CENTRAL KY.
LATE AFTERNOON SURFACE ANALYSES SHOWED A BOUNDARY EXTENDING SWD FROM
WEST CENTRAL/SWRN IND THROUGH WEST CENTRAL KY TO NWRN AL.
ENVIRONMENT IMMEDIATELY DOWNSTREAM OF THIS WIND SHIFT HAS
EXPERIENCED STRONG SURFACE HEATING CONTRIBUTING TO AN INCREASE IN
AVAILABLE SURFACE BASED INSTABILITY /MUCAPE UP TO 1000 J PER KG/.
MEANWHILE...A SHORTWAVE TROUGH ROUNDING THE BASE OF A PROGRESSIVE
MID MS VALLEY CLOSED LOW WAS MOVING ENEWD THROUGH SERN MO/NERN AR AT
THIS TIME. 70-80 KT SWLY MIDLEVEL JET ACCOMPANYING THIS TROUGH WILL
OVERSPREAD THE DISCUSSION AREA THIS EVENING MAINTAINING DEEP LAYER
SHEAR FOR ADDITIONAL ORGANIZED STORMS.
AT 22Z...REGIONAL RADAR IMAGERY SHOWED DEEPER MOIST CONVECTION
DEVELOPING SWD ALONG THE WIND SHIFT INTO CENTRAL KY. GIVEN THE
AFOREMENTIONED FACTORS AND BACKED E/SELY SURFACE WINDS ACROSS SRN
IND INTO CENTRAL KY...THE POTENTIAL EXISTS FOR AN INCREASE IN TSTM
ACTIVITY THIS EVENING WITH AN ATTENDANT THREAT FOR
TORNADOES...DAMAGING WINDS AND HAIL.
..PETERS.. 03/23/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...JKL...ILN...LMK...OHX...IND...PAH...
LAT...LON 39768669 39958487 38578483 37078498 36698506 36648714
39078671 39768669SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 23, 10:46 AM EDT | Mesoscale Discussion | SPC | Daviess, Dubois, Gibson, Greene, Knox, Martin and 6 more | 119 min |
| Mar 23, 12:44 PM EDT | Severe Thunderstorm Watch | SPC | Clay, Daviess, Gibson, Greene, Knox, Lawrence and 10 more | 7 hr |
| Mar 23, 2:28 PM EDT | Mesoscale Discussion | SPC | Clay, Daviess, Dubois, Gibson, Greene, Knox and 12 more | 62 min |
| Mar 23, 4:17 PM EDT | Mesoscale Discussion | SPC | Bartholomew, Benton, Boone, Brown, Carroll, Clay and 35 more | 58 min |
| Mar 23, 4:39 PM EDT | Severe Thunderstorm Watch | SPC | Benton, Boone, Brown, Carroll, Cass, Clinton and 18 more | 4 hr |
| Mar 23, 6:25 PM EDT | Tornado Watch | SPC | Bartholomew, Boone, Brown, Carroll, Clark, Clinton and 39 more | 7 hr |
Nearby
Mesoscale Discussions in Kentucky, 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; radar from the NEXRAD Level II archive.