Alert archive / Kentucky / Mesoscale Discussions in 2004

Mesoscale Discussion 2467

November 24, 20045 states

The Storm Prediction Center issued this mesoscale discussion at Nov 24, 2004, 2:56 PM CST for 5 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Nov 24, 2004, 2:56 PM CST (20:56 UTC)
Expired
Nov 24, 2004, 5:00 PM CST
In force
2 hr
Issued by
the Storm Prediction Center
All 112 counties

Edwards County, IL, Gallatin County, IL, Hamilton County, IL, Hardin County, IL, Pope County, IL, Saline County, IL, Wabash County, IL, Wayne County, IL, White County, IL, Bartholomew County, IN, Brown County, IN, Clark County, IN, Dearborn County, IN, Decatur County, IN, Dubois County, IN, Fayette County, IN, Franklin County, IN, Gibson County, IN, Jackson County, IN, Jefferson County, IN, Jennings County, IN, Lawrence County, IN, Monroe County, IN, Ohio County, IN, Perry County, IN, Pike County, IN, Posey County, IN, Ripley County, IN, Scott County, IN, Spencer County, IN, Switzerland County, IN, Union County, IN, Vanderburgh County, IN, Warrick County, IN, Washington County, IN, Adair County, KY, Allen County, KY, Anderson County, KY, Boone County, KY, Boyle County, KY, Butler County, KY, Caldwell County, KY, Calloway County, KY, Carroll County, KY, Casey County, KY, Christian County, KY, Crittenden County, KY, Daviess County, KY, Franklin County, KY, Gallatin County, KY, Garrard County, KY, Hancock County, KY, Henderson County, KY, Henry County, KY, Hopkins County, KY, Lincoln County, KY, Livingston County, KY, Logan County, KY, Lyon County, KY, Marshall County, KY, McLean County, KY, Mercer County, KY, Monroe County, KY, Muhlenberg County, KY, Ohio County, KY, Oldham County, KY, Owen County, KY, Shelby County, KY, Simpson County, KY, Todd County, KY, Trigg County, KY, Trimble County, KY, Union County, KY, Webster County, KY, Butler County, OH, Hamilton County, OH, Montgomery County, OH, Preble County, OH, Bedford County, TN, Benton County, TN, Cannon County, TN, Cheatham County, TN, Coffee County, TN, Davidson County, TN, Decatur County, TN, DeKalb County, TN, Dickson County, TN, Giles County, TN, Hardin County, TN, Henry County, TN, Hickman County, TN, Houston County, TN, Humphreys County, TN, Jackson County, TN, Lawrence County, TN, Lewis County, TN, Lincoln County, TN, Macon County, TN, Marshall County, TN, Maury County, TN, Montgomery County, TN, Moore County, TN, Perry County, TN, Robertson County, TN, Rutherford County, TN, Smith County, TN, Stewart County, TN, Sumner County, TN, Trousdale County, TN, Wayne County, TN, Williamson County, TN, Wilson County, TN

The radar

The Louisville radar (KLVX), 47 km from the middle of the area, began a volume at 20:58 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, 8.9 hours before the alert went out and 167 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.

Skew-T log-pSkew-T log-p diagram, Nashville Metro, TN at 12:00Z on 2004-11-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 21 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Nashville Metro, TN at 12:00Z on 2004-11-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 436 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
21 J/kg
Mixed-layer CIN
-283 J/kg
Mixed-layer LCL
867 m above ground
0-6 km bulk shear
59 kt
0-1 km storm-relative helicity
436 m²/s²
0-3 km storm-relative helicity
481 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

007 
ACUS11 KWNS 242056
SWOMCD
SPC MCD 242056 
OHZ000-KYZ000-INZ000-TNZ000-ILZ000-242300-

MESOSCALE DISCUSSION 2467
NWS STORM PREDICTION CENTER NORMAN OK
0256 PM CST WED NOV 24 2004

AREAS AFFECTED...PORTIONS WRN/MID TN...WRN/CENTRAL KY...SRN
INDIANA...SWRN OH

CONCERNING...TORNADO WATCH 902...903...

VALID 242056Z - 242300Z

DEEPENING SFC CYCLONE IS ANALYZED OVER SRN INDIANA JUST SSE OF
IND...AND SHOULD CONTINUE TRACKING INTO WRN OH.  SFC WARM FRONT WILL
LIFT NWD ACROSS MORE OF SWRN OH FOLLOWED BY WEAKLY BUOYANT WARM
SECTOR AIR MASS...WITH MLCAPES LESS THAN 500 J/KG.  STRONGEST LOW
LEVEL HODOGRAPHS WILL REMAIN AHEAD OF SFC LOW PATH OVER INDIANA/SWRN
OH.  THOUGH AIR MASS REMAINS MARGINALLY UNSTABLE...SOME UPDRAFTS
HAVE REMAINED UPRIGHT ENOUGH TO WARRANT WARNINGS...AND KINEMATIC
PROFILES CONTINUE TO BE QUITE FAVORABLE INVOF WARM FRONT.  MODIFIED
MODEL SOUNDINGS AND 18Z ILN RAOB SUGGEST JUST 1-2 DEG C COOLING NEAR
SFC  OVER REMAINDER WW AREAS REMOVES SBCAPE...THEREFORE...PRIND
THREAT SHOULD DIMINISH AFTER ANOTHER COUPLE HOURS.

FARTHER S...AIR MASS ACROSS MIDDLE/ERN TN IS NOT EXPECTED TO
DESTABILIZE MUCH FURTHER IN LOW LEVELS...SO WW ISSUANCE THERE MAY
NOT BE NECESSARY.  VEERED FLOW WILL LIMIT CONVERGENCE...ALTHOUGH TCU
PERSIST IN SRN EXTENT OF CONVECTIVE ARC.  OPPORTUNITIES FOR
ADDITIONAL/SUSTAINED SFC-BASED CONVECTIVE DEVELOPMENT OVER TN APPEAR
TO BE SHRINKING AS DIABATIC HEATING PASSES PEAK...AND AS ISALLOBARIC
FORCING ASSOCIATED WITH OH VALLEY CYCLONE KEEPS BOUNDARY LAYER FLOW
SWLY.  STILL...WW SHOULD BE MAINTAINED UNTIL PROBABILITIES FOR
DEVELOPMENT DROP SUBSTANTIALLY...IN DEFERENCE TO STRENGTH OF AMBIENT
SHEAR AND DYNAMIC COOLING ALOFT.

..EDWARDS.. 11/24/2004

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...JKL...ILN...LMK...OHX...IND...HUN...PAH...ILX...MEG...LSX...

37508406 36638656 39188654 40098406 

35078618 35048827 38618891 38668663

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Nov 24, 6:50 AM CSTMesoscale DiscussionSPCAdams, Brown, Cass, DeWitt, Ford, Fulton and 20 more5 hr
Nov 24, 10:16 AM CSTMesoscale DiscussionSPCGallatin, Hardin, Johnson, Massac, Pope, Pulaski and 1 more2 hr
Nov 24, 11:30 AM CSTTornado WatchSPCEdwards, Gallatin, Hamilton, Hardin, Pope, Saline and 3 more6 hr
Nov 24, 12:31 PM CSTMesoscale DiscussionSPCBrown, Bureau, Cass, Champaign, Christian, DeKalb and 32 more5 hr
Nov 24, 12:55 PM CSTMesoscale DiscussionSPCEdwards, Gallatin, Hamilton, Hardin, Pope, Saline and 3 more95 min
Nov 24, 1:25 PM CSTTornado WatchSPCBartholomew, Brown, Clark, Crawford, Dearborn, Decatur and 16 more5 hr
Nov 24, 5:02 PM CSTMesoscale DiscussionSPCBartholomew, Brown, Clark, Crawford, Dearborn, Decatur and 12 more28 min
Nov 24, 5:25 PM CSTTornado WatchSPCDearborn, Decatur, Fayette, Franklin, Ohio, Ripley and 4 more4 hr
Nov 23, 9:00 PM CSTMesoscale DiscussionSPCBedford, Benton, Cannon, Carroll, Cheatham, Chester and 32 more2 hr
Nov 23, 9:20 PM CSTTornado WatchSPCFranklin, Giles, Grundy, Hardin, Lawrence, Lincoln and 3 more7 hr

Nearby

Mesoscale Discussions in Kentucky, 2004Mesoscale Discussions in Tennessee, 2004Mesoscale Discussions in Indiana, 2004Every mesoscale discussion in 2004

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.