Alert archive / Kentucky / Tornado Watches in 2004

Tornado Watch 674

July 30, 20045 counties in Indiana; 37 counties in Kentucky

The Storm Prediction Center issued this tornado watch at Jul 30, 2004, 6:05 PM EDT for 5 counties in Indiana; 37 counties in Kentucky. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued: Jul 30, 2004, 6:05 PM EDT (22:05 UTC)
Expired: Jul 30, 2004, 11:00 PM EDT
In force: 5 hr
Issued by: the Storm Prediction Center

All 42 counties

Clark County, IN, Floyd County, IN, Harrison County, IN, Perry County, IN, Switzerland County, IN, Anderson County, KY, Boone County, KY, Boyle County, KY, Breckinridge County, KY, Bullitt County, KY, Butler County, KY, Campbell County, KY, Carroll County, KY, Edmonson County, KY, Fayette County, KY, Franklin County, KY, Gallatin County, KY, Grant County, KY, Grayson County, KY, Hancock County, KY, Hardin County, KY, Hart County, KY, Henry County, KY, Jefferson County, KY, Jessamine County, KY, Kenton County, KY, Larue County, KY, Marion County, KY, Meade County, KY, Mercer County, KY, Nelson County, KY, Ohio County, KY, Oldham County, KY, Owen County, KY, Pendleton County, KY, Scott County, KY, Shelby County, KY, Spencer County, KY, Trimble County, KY, Warren County, KY, Washington County, KY, Woodford County, KY

The radar

The Louisville radar (KLVX), 9 km from the middle of the area, began a volume at 22:06 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.

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Nashville Metro, TN (KBNA), 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 575 J/kg
Mixed-layer CIN: -52 J/kg
Mixed-layer LCL: 711 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 76 m²/s²
0-3 km storm-relative helicity: 129 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.3

Open this sounding in Storm Lab

The text

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

419 
WWUS20 KWNS 302202
SEL4  
SPC WW 302205
INZ000-KYZ000-310300-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 674
NWS STORM PREDICTION CENTER NORMAN OK
505 PM CDT FRI JUL 30 2004

THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF 

       SOUTHERN INDIANA
       CENTRAL KENTUCKY

EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 505 PM UNTIL 1000
PM CDT.

TORNADOES...HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS ALONG AND 45 STATUTE MILES NORTH AND
SOUTH OF A LINE FROM 35 MILES NORTHWEST OF BOWLING GREEN KENTUCKY
TO 35 MILES NORTH NORTHEAST OF LEXINGTON KENTUCKY.

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA.
PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING
WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE
WARNINGS.

DISCUSSION...SHEAR PROFILES AND MDT/STG INSTABILITY ARE FAVORABLE
FOR DEVELOPMENT OF SUPERCELL THUNDERSTORMS AHEAD OF MID LEVEL
TROUGH.  STORMS EXPECTED TO INCREASE AND INTENSIFY WITH ISOLATED
TORNADOES POSSIBLE WITH ANY SUPERCELL ALONG WITH DAMAGING DOWNBURST
WINDS.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
550. MEAN STORM MOTION VECTOR 24025.


...HALES

375,0865 390,0841 375,0841 364,0865

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 30, 2:54 PM EDT	Mesoscale Discussion	SPC	Dearborn, Ohio	2 hr
Jul 30, 5:12 PM EDT	Mesoscale Discussion	SPC	Clark, Crawford, Dearborn, Dubois, Floyd, Harrison and 8 more	33 min

Nearby

Tornado Watches in Kentucky, 2004 Tornado Watches in Indiana, 2004 Every tornado watch 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.