Alert archive / Kentucky / Mesoscale Discussions in 2012
Mesoscale Discussion 54
The Storm Prediction Center issued this mesoscale discussion at Jan 23, 2012, 1:52 AM EST for 22 counties in Indiana; 71 counties in Kentucky; 20 counties in Ohio. It was in force for 113 min.
The area
The outline as issued.
The facts
- Issued
- Jan 23, 2012, 1:52 AM EST (06:52 UTC)
- Expired
- Jan 23, 2012, 3:45 AM EST
- In force
- 113 min
- Issued by
- the Storm Prediction Center
All 113 counties
Bartholomew County, IN, Brown County, IN, Clark County, IN, Dearborn County, IN, Decatur County, IN, Fayette County, IN, Floyd County, IN, Franklin County, IN, Harrison County, IN, Jackson County, IN, Jefferson County, IN, Jennings County, IN, Johnson County, IN, Ohio 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, Bath County, KY, Boone County, KY, Bourbon County, KY, Boyle County, KY, Bracken County, KY, Breckinridge County, KY, Bullitt County, KY, Butler County, KY, Campbell County, KY, Carroll County, KY, Casey County, KY, Clark County, KY, Clinton County, KY, Cumberland County, KY, Edmonson County, KY, Estill County, KY, Fayette County, KY, Fleming County, KY, Franklin County, KY, Gallatin County, KY, Garrard County, KY, Grant County, KY, Grayson County, KY, Green County, KY, Hardin County, KY, Harrison County, KY, Hart County, KY, Henry County, KY, Jackson County, KY, Jefferson County, KY, Jessamine County, KY, Kenton County, KY, Larue County, KY, Lewis County, KY, Lincoln County, KY, Logan County, KY, Madison County, KY, Marion County, KY, Mason County, KY, McCreary County, KY, Meade County, KY, Menifee County, KY, Mercer County, KY, Metcalfe County, KY, Monroe County, KY, Montgomery County, KY, Nelson County, KY, Nicholas County, KY, Oldham County, KY, Owen 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, Shelby County, KY, Simpson County, KY, Spencer County, KY, Taylor County, KY, Trimble County, KY, Warren County, KY, Washington County, KY, Wayne County, KY, Woodford County, KY, Adams County, OH, Brown County, OH, Butler County, OH, Champaign County, OH, Clark County, OH, Clermont County, OH, Clinton County, OH, Fayette County, OH, Greene County, OH, Hamilton County, OH, Highland County, OH, Madison County, OH, Miami County, OH, Montgomery County, OH, Pickaway County, OH, Pike County, OH, Preble County, OH, Ross County, OH, Scioto County, OH, Warren County, OH
The radar
The Louisville radar (KLVX), 109 km from the middle of the area, began a volume at 06:51 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 00:00Z, 6.9 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 415 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 262 m²/s²
- 0-3 km storm-relative helicity
- 290 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
554
ACUS11 KWNS 230652
SWOMCD
SPC MCD 230652
OHZ000-KYZ000-TNZ000-INZ000-230845-
MESOSCALE DISCUSSION 0054
NWS STORM PREDICTION CENTER NORMAN OK
1252 AM CST MON JAN 23 2012
AREAS AFFECTED...PORTIONS CENTRAL/ERN KY...SERN
INDIANA...SWRN/S-CENTRAL OH.
CONCERNING...SEVERE THUNDERSTORM WATCH 8...
VALID 230652Z - 230845Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 8 CONTINUES.
WW MAY BE CLEARED FROM W-E...AS PRIMARY BAND OF STG-SVR TSTMS
PASSES. ADDITIONAL SVR WW MAY BE ISSUED WITHIN AN HOUR...DOWNSHEAR
ACROSS PARTS OF SERN INDIANA...SWRN OH AND CENTRAL/NRN KY.
PRIND SVR THREAT WILL REMAIN PRIMARILY IN FORM OF CONVECTIVE
WIND...AND WILL DIMINISH WITH TIME AND EWD EXTENT ACROSS DISCUSSION
AREA. WARMING CLOUD TOP TRENDS ARE NOTED ON IR IMAGERY...HOWEVER
EVEN LOWER-TOPPED CONVECTION STILL MAY POSE DAMAGING GUST POTENTIAL
GIVEN SUFFICIENTLY STG LOW-LEVEL FORCING AND AT LEAST NEUTRAL-WEAK
INSTABILITY ROOTED NEAR SFC. E END OF SVR THREAT IS UNCERTAIN...AS
SQUALL LINE WILL BE MOVING OVER BOUNDARY LAYER AIR MASS
CHARACTERIZED BY
1. STATIC STABILITY BECOMING PROGRESSIVELY HIGHER IN MAGNITUDE AND
GREATER IN DEPTH WITH EWD EXTENT....YET
2. STABLE LAYER NEAR SFC ERODING GRADUALLY FROM SW IN PRESENCE OF
STG LOW-LEVEL WAA...WITH MUCAPE 200-600 J/KG ESTIMATED BASED ON FCST
SOUNDINGS. STG WINDS ARE EVIDENT IN VWP JUST ABOVE SFC...E.G. 70-80
KT IN 1-3 KM AGL LAYER PER LVX VWP SAMPLE...WITH SVR MOMENTUM
TRANSFER TO SFC POSSIBLE IN DOWNDRAFTS.
CONVECTION IS PROJECTED TO EXIT ERN PORTIONS WW AROUND 730Z-08Z
BASED ON PRESENT MOTION...WHICH MAY ACCELERATE SLIGHTLY AS MORE
INTENSE MEAN FLOW MOVES OVER AREA AHEAD OF EJECTING MID-UPPER
TROUGH.
..EDWARDS.. 01/23/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...RLX...JKL...ILN...LMK...OHX...IND...PAH...
LAT...LON 36648723 37948638 39228632 39528633 39968484 40208381
39848300 39308268 38638299 37898361 36608457 36648723SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 22, 8:28 PM EST | Tornado Watch | SPC | Gibson, Pike, Posey, Spencer, Vanderburgh, Warrick | 5 hr |
| Jan 22, 9:25 PM EST | Mesoscale Discussion | SPC | Bartholomew, Benton, Boone, Brown, Carroll, Cass and 35 more | 2 hr |
| Jan 22, 11:49 PM EST | Mesoscale Discussion | SPC | Bartholomew, Brown, Clark, Clay, Crawford, Daviess and 24 more | 86 min |
| Jan 23, 12:34 AM EST | Severe Thunderstorm Watch | SPC | Bartholomew, Brown, Clark, Clay, Crawford, Daviess and 15 more | 3 hr |
| Jan 23, 2:14 AM EST | Severe Thunderstorm Watch | SPC | Dearborn, Franklin, Ohio, Ripley, Switzerland | 5 hr |
| Jan 22, 9:37 PM EST | Mesoscale Discussion | SPC | Ballard, Carlisle, Fulton, Hickman, McCracken | 83 min |
| Jan 23, 5:11 AM EST | Mesoscale Discussion | SPC | Bath, Bell, Breathitt, Carter, Clay, Elliott and 19 more | 64 min |
| Jan 23, 11:46 AM EST | Mesoscale Discussion | SPC | Bath, Boone, Bourbon, Bracken, Campbell, Clark and 18 more | 89 min |
| Jan 23, 3:26 PM EST | Mesoscale Discussion | SPC | Belmont, Carroll, Columbiana, Harrison, Jefferson, Mahoning and 4 more | 94 min |
Nearby
Mesoscale Discussions in Kentucky, 2012Mesoscale Discussions in Indiana, 2012Mesoscale Discussions in Ohio, 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.