Alert archive / Kentucky / Mesoscale Discussions in 2003

Mesoscale Discussion 764

May 5, 20034 states

The Storm Prediction Center issued this mesoscale discussion at May 5, 2003, 12:59 PM EDT for 4 states. It was in force for 61 min.

The area

The outline as issued.

The facts

Issued
May 5, 2003, 12:59 PM EDT (16:59 UTC)
Expired
May 5, 2003, 2:00 PM EDT
In force
61 min
Issued by
the Storm Prediction Center
All 75 counties

Harrison County, IN, Perry County, IN, Adair County, KY, Allen County, KY, Anderson County, KY, Barren County, KY, Bell County, KY, Boyle County, KY, Breathitt County, KY, Breckinridge County, KY, Bullitt County, KY, Butler County, KY, Casey County, KY, Clark County, KY, Clay County, KY, Clinton County, KY, Cumberland County, KY, Edmonson County, KY, Elliott County, KY, Estill County, KY, Fayette County, KY, Floyd County, KY, Garrard County, KY, Grayson County, KY, Green County, KY, Hancock County, KY, Hardin County, KY, Harlan County, KY, Hart County, KY, Jackson County, KY, Jefferson County, KY, Jessamine County, KY, Johnson County, KY, Knott County, KY, Knox County, KY, Larue County, KY, Laurel County, KY, Lawrence County, KY, Lee County, KY, Leslie County, KY, Letcher County, KY, Lincoln County, KY, Logan County, KY, Madison County, KY, Magoffin County, KY, Marion County, KY, McCreary County, KY, Meade County, KY, Menifee County, KY, Mercer County, KY, Metcalfe County, KY, Monroe County, KY, Montgomery County, KY, Morgan County, KY, Muhlenberg County, KY, Nelson County, KY, Ohio County, KY, Owsley County, KY, Perry County, KY, Powell County, KY, Pulaski County, KY, Rockcastle County, KY, Russell County, KY, Simpson County, KY, Spencer County, KY, Taylor County, KY, Todd County, KY, Warren County, KY, Washington County, KY, Wayne County, KY, Whitley County, KY, Wolfe County, KY, Woodford County, KY, Pickett County, TN, Lee County, VA

The radar

The Louisville radar (KLVX), 96 km from the middle of the area, began a volume at 17:03 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, 5.0 hours before the alert went out and 189 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 2003-05-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 616 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 2003-05-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 575 square meters per square second.1939587897Sfc1 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
616 J/kg
Mixed-layer CIN
-70 J/kg
Mixed-layer LCL
622 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
575 m²/s²
0-3 km storm-relative helicity
604 m²/s²
Significant tornado parameter
2.0
Supercell composite
12.6

Open this sounding in Storm Lab

The text

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

773 
ACUS11 KWNS 051659
SWOMCD
SPC MCD 051659 
WVZ000-VAZ000-KYZ000-TNZ000-INZ000-051800-

MESOSCALE DISCUSSION 0764
NWS STORM PREDICTION CENTER NORMAN OK
1159 AM CDT MON MAY 05 2003

AREAS AFFECTED...KY IN

CONCERNING...TORNADO WATCH 249...

VALID 051659Z - 051800Z

VERY UNSTABLE AIRMASS CONTINUES TO FEED INTO WRN/CENTRAL KY ON
STRONG SWLY FLOW  AHEAD OF COLD FRONT.	VWP PROFILES FROM LVX AND
JKL INDICATE STRONG WIND PROFILES WITH 0-6KM SHEAR OF 50-60KT. 
ADDITIONALLY VEERING BOUNDARY LAYER FLOW RESULTS IN HELICITIES FROM
300-400 M2/S2.	WITH MUCAPES UP TO 3000 J/KG AND VERY WEAK
CAP...SEVERE THUNDERSTORMS ARE EXPECTED TO REDEVELOP WRN/CENTRAL KY 
IN THE NEXT 1-2 HOURS WITH A CONTINUED THREAT OF TORNADIC
SUPERCELLS.

WW249 WILL BE REPLACED WITHIN THE HOUR BY A NEW TORNADO WATCH.

..HALES.. 05/05/2003

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

ATTN...WFO...RLX...MRX...JKL...LMK...OHX...PAH...

36668734 38098685 38218595 38138332 38228244 36538302
36538502

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 4, 9:05 PM EDTMesoscale DiscussionSPCPosey85 min
May 4, 10:26 PM EDTMesoscale DiscussionSPCPosey2 hr
May 4, 11:40 PM EDTTornado WatchSPCGibson, Pike, Posey, Spencer, Vanderburgh, Warrick5 hr
May 5, 12:37 AM EDTMesoscale DiscussionSPCClark, Crawford, Dubois, Floyd, Harrison, Jefferson and 5 more23 min
May 5, 12:45 AM EDTTornado WatchSPCClark, Crawford, Floyd, Harrison, Orange, Perry and 1 more5 hr
May 5, 2:30 AM EDTMesoscale DiscussionSPCGibson, Pike, Posey, Spencer, Vanderburgh, Warrick90 min
May 5, 2:46 AM EDTMesoscale DiscussionSPCBartholomew, Boone, Brown, Clay, Clinton, Crawford and 34 more89 min
May 5, 3:31 AM EDTMesoscale DiscussionSPCCrawford, Floyd, Harrison89 min
May 5, 4:41 AM EDTMesoscale DiscussionSPCGibson, Posey, Spencer, Vanderburgh, Warrick34 min
May 5, 4:50 AM EDTTornado WatchSPCGibson, Posey, Spencer, Vanderburgh, Warrick6 hr
May 5, 7:32 AM EDTMesoscale DiscussionSPCGibson, Posey, Spencer, Vanderburgh, Warrick88 min
May 5, 8:35 AM EDTTornado WatchSPCHarrison, Perry5 hr
May 5, 10:19 AM EDTMesoscale DiscussionSPCGibson, Posey, Spencer, Vanderburgh, Warrick56 min
May 5, 11:12 AM EDTMesoscale DiscussionSPCHarrison, Perry93 min
May 5, 1:20 PM EDTTornado WatchSPCClark, Crawford, Dubois, Floyd, Gibson, Harrison and 6 more7 hr
May 5, 3:47 PM EDTMesoscale DiscussionSPCCrawford, Dubois, Floyd, Gibson, Harrison, Perry and 4 more118 min
May 5, 5:27 PM EDTMesoscale DiscussionSPCSteuben3 hr
May 5, 5:42 PM EDTMesoscale DiscussionSPCOhio3 hr
May 5, 7:33 PM EDTMesoscale DiscussionSPCClark, Crawford, Dubois, Floyd, Gibson, Harrison and 6 more57 min
May 4, 8:34 PM EDTMesoscale DiscussionSPCBallard, Caldwell, Calloway, Carlisle, Christian, Fulton and 7 more116 min
May 5, 2:20 AM EDTTornado WatchSPCBallard, Caldwell, Calloway, Carlisle, Christian, Fulton and 7 more6 hr
May 5, 5:18 AM EDTMesoscale DiscussionSPCAllen, Ballard, Barren, Butler, Caldwell, Calloway and 19 more57 min
May 5, 5:55 AM EDTTornado WatchSPCFulton6 hr
May 5, 10:35 AM EDTTornado WatchSPCCalloway, Fulton5 hr
May 5, 12:06 PM EDTMesoscale DiscussionSPCFulton114 min
May 5, 3:13 PM EDTMesoscale DiscussionSPCFulton62 min
May 5, 3:35 PM EDTTornado WatchSPCFulton7 hr
May 5, 6:15 PM EDTTornado WatchSPCBracken, Campbell, Grant, Greenup, Kenton, Lewis and 4 more5 hr
May 5, 7:47 PM EDTMesoscale DiscussionSPCBath, Bourbon, Boyd, Bracken, Campbell, Carter and 15 more88 min
May 5, 4:15 AM EDTTornado WatchSPCAnderson, Bledsoe, Blount, Bradley, Campbell, Claiborne and 25 more6 hr
May 5, 7:07 AM EDTMesoscale DiscussionSPCAnderson, Bledsoe, Bradley, Cumberland, Fentress, Grundy and 15 more83 min
May 5, 8:11 AM EDTMesoscale DiscussionSPCBedford, Benton, Cannon, Carroll, Cheatham, Chester and 49 more2 hr
May 5, 9:50 AM EDTTornado WatchSPCBledsoe, Blount, Bradley, Grundy, Hamilton, Loudon and 8 more6 hr
May 5, 10:05 AM EDTMesoscale DiscussionSPCBedford, Benton, Cannon, Carroll, Cheatham, Chester and 42 more115 min
May 5, 1:52 PM EDTMesoscale DiscussionSPCBledsoe, Blount, Bradley, Hamilton, McMinn, Marion and 5 more113 min
May 5, 6:18 PM EDTMesoscale DiscussionSPCDyer, Lake, Lauderdale117 min
May 5, 6:40 PM EDTMesoscale DiscussionSPCChester, Fayette, Franklin, Giles, Hardeman, Hardin and 7 more2 hr

Nearby

Mesoscale Discussions in Kentucky, 2003Mesoscale Discussions in Indiana, 2003Mesoscale Discussions in Tennessee, 2003Every mesoscale discussion in 2003

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.