Severe Thunderstorm Warning 143, NWS Louisville, KY

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LOUISVILLE KY
348 PM EDT WED JUL 18 2007

.SHORT TERM (TONIGHT AND TOMORROW)...

PRECIPITATION TO OUR NORTH HAS FINALLY DISSIPATED...AND OTHER THAN
ISOLATED STORMS THAT HAVE PERIODICALLY FIRED ALONG AN ILL-DEFINED
EAST TO WEST BOUNDARY BISECTING KENTUCKY...HAS BEEN A DAY OF WAIT
AND SEE...WITH MORE WAIT THAN SEE.  WITH NO SYNOPTIC LEVEL DYNAMICS
TO SUSTAIN CURRENT THUNDERSTORMS IN THE FORECAST AREA...THESE SHOULD
DIE OUT THIS EVENING.  INTERESTING THAT THE FEW STORMS THAT HAVE
DEVELOPED ALONG THIS LINE TODAY HAVE DEVELOPED IN NEARLY THE SAME
SPOT TWO OR 3 TIMES AND LASTED ONLY 20-30 MINUTES. THIS HAS RESULTED
IN AN ISOLATED STORM TOTAL PRECIP OF 1.0 - 1.5 INCHES IN NORTHERN
GREEN COUNTY...DROPPING QUICKLY TO ZERO IN ALL DIRECTIONS.

AFTER THE ISOLATED THUNDER THIS EVENING SHOULD BE A NEAR REPEAT OF
OVERNIGHT CONDITIONS BY TOMORROW MORNING...WITH ISOLATED FOG ALONG
SOME WATERWAYS. THIS WILL BE SHORT LIVED AND NOT WIDESPREAD
THOUGH.

PRECIP CHANCES INCREASE TOMORROW AS COLD FRONT PUSHES SOUTH INTO THE
AREA. 00Z NAM/WRF HAD THE BEST HANDLE TODAY ON PCPN (OR LACK
THEREOF) AND 06Z RUN SHOWS WELL DEFINED SQUALL LINE BY 00Z TOMORROW
NIGHT. WITH DEWPOINTS AROUND 70...WILL BE PLENTY OF MOISTURE TO WORK
WITH...SO SHOULD HELP PUT A DENT IN DROUGHT CONDITIONS.

SULLIVAN

.LONG TERM (THURSDAY NIGHT THROUGH WEDNESDAY)...

THURSDAY NIGHT AND FRIDAY...

SHORT RANGE MODELS HAVE BEEN SOLID WITH THE STRONG COLD FRONTAL
PASSAGE THURSDAY NIGHT...TO BLEND OUT THE DIFFERENCES HAVE LEANED
TOWARDS THE REASONABLE SOLUTION OF THE 09Z SREF. HAVE BEEFED UP POPS
INTO THE LOW END CATEGORICAL RANGE...AREAWIDE RAINFALL LOOKS VERY
LIKELY. MAIN QUESTION THAT EXISTS IS THE POSSIBILITY OF STRONG TO
SEVERE STORMS...MODEST SHEAR DOES EXIST...AS WELL AS INSTABILITY.
THEREFORE A FEW STRONGER STORMS WILL BE A POSSIBILITY...LESSENING AS
THE NIGHT PROGRESSES. HIGH PRECIP EFFICIENCY IS FOUND ALONG AND
AHEAD OF THE FRONT...WITH PWATS NEARING 2 INCHES. LOCALLY HEAVY
RAINFALL MAY OCCUR WITH AMOUNTS NEAR OR OVER ONE INCH POSSIBLE
ACROSS THE REGION OVERNIGHT. FRONT SHOULD BE THROUGH THE REGION BY
09 TO 12Z FRIDAY...AND HEADING INTO THE TN VALLEY AND EASTERN KY.
PRECIP WILL END FOR MUCH IF NOT ALL OF THE AREA BY DAYBREAK
FRIDAY...WITH SOME CLEARING OCCURRING FROM THE NORTH BEFORE
DAYBREAK.

UPPER LEVEL PATTERN CREATES STRONG NORTHERLY FLOW INTO THE OHIO
VALLEY AS A TROUGH DEEPENS OVER THE EASTERN STATES. SURFACE HIGH
PRESSURE WILL DROP INTO THE REGION FRIDAY...WITH MUCH DRIER AIR AND
CLEARING SKIES...AN EARLY FALL LIKE DAY AS H850 TEMPS DROP TO AROUND
10 C WITH HIGHS IN THE LOWER 80S...STRUGGLING TO REACH 80 ACROSS
PORTIONS OF THE BLUEGRASS REGION OF EAST CENTRAL KY. WITH MORNING
LOWS DROPPING INTO THE 50S BY EARLY SATURDAY MORNING.

SATURDAY THROUGH WEDNESDAY...

EXTENDED MODELS CONTINUE TO HAVE SOME ISSUES DEALING WITH THE TROUGH
OR CUT-OFF IN THE EAST THRU THE WEEKEND. THOUGH OVERALL IT WILL HAVE
LITTLE EFFECT ON THE WEATHER OTHER THAN A FEW DEGREES ON THE
TEMPERATURES. WILL STAY CLOSE TO THE ENSEMBLE MEAN TO IRON OUT THESE
DIFFERENCES AMONG THE OPERATIONAL MODELS. THE UKMET HAS BEEN FAIRLY
CONSISTENT AT H500 AS COMPARED TO THE EURO AND THE GFS THE LAST FEW
DAYS...POSSIBLE ISSUE IS THE MODELS DEALING WITH THE TROPICAL STORMS
IN THE PACIFIC...BEST OF THE THREE WITH ALL MODELS VERIFYING AT
LOWER THAN AVERAGE LEVELS THE LAST 3 TO 5 DAYS.

SURFACE HI PRESSURE STILL DOMINATES THE REGION INTO THE EARLY
WORKWEEK...WITH LOWER THAN NORMAL TEMPERATURES SAT THRU MON...WITH
FAIRLY DRY AIR IN PLACE ACROSS THE REGION. AMPLE...IF NOT NEAR FULL
SUNSHINE EACH DAY. SURFACE HI STARTS TO DRIFT SOUTHEAST OVER THE
AREA TUESDAY AND JUST SOUTHEAST OF THE REGION ON WEDNESDAY...EACH
DAY SHOULD BE DRY AS WELL WITH WARMING TEMPERATURES TO JUST ABOVE
SEASONAL AVERAGES EACH DAY...AND INCREASING DEWPOINTS. MODELS
CONTINUE TO SUGGEST THAT A PERIOD OF WARM AND HUMID WEATHER WILL
LAST AT LEAST A FEW DAYS INTO THE END OF THE WEEK.

TODAY IS MY LAST DAY SERVING THE PEOPLE OF SOUTH CENTRAL INDIANA AND
CENTRAL KENTUCKY...I HAVE ENJOYED WORKING FOR YOU ALL AND WILL LEAVE
WITH MANY FOND MEMORIES OF THE REGION. THANK YOU ALL

--SCHOTT

.AVIATION... (18Z TAFS)

CONVECTION IN INDIANA CONTINUES TO DISSIPATE AS IT CROSSES THE OH
RIVER AT MIDDAY.  MID LEVEL DEBRIS CLOUD SHIELD AHEAD OF THIS
HAMPERING SURFACE HEATING AND MAY PREVENT CONVECTIVE TEMPS BEING
REACHED. EVEN WITH MORE SUN AT BWG FORECAST SOUNDINGS SHOW ONLY A
SLIGHT CHANCE OF CAP BEING BROKEN.  WILL KEEP CHANCE OF THUNDER IN
AT LEX AND SDF UNTIL AFTER CLOSEST AREA OF PRECIP PASSES...BUT LOOKS
MORE LIKELY FOR TOMORROW.

JBS
&&

.LMK WATCHES/WARNINGS/ADVISORIES...
KY...NONE.
IN...NONE.
&&

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LOUISVILLE KY
433 PM EDT WED JUL 18 2007

INZ076>079-083-084-089>092-KYZ023>043-045>049-053>057-061>067-
070>078-081-082-190830-
ORANGE IN-WASHINGTON IN-SCOTT IN-JEFFERSON IN-DUBOIS IN-
CRAWFORD IN-PERRY IN-HARRISON IN-FLOYD IN-CLARK IN-HANCOCK KY-
BRECKINRIDGE KY-MEADE KY-OHIO KY-GRAYSON KY-HARDIN KY-BULLITT KY-
JEFFERSON KY-OLDHAM KY-TRIMBLE KY-HENRY KY-SHELBY KY-FRANKLIN KY-
SCOTT KY-HARRISON KY-SPENCER KY-ANDERSON KY-WOODFORD KY-
FAYETTE KY-BOURBON KY-NICHOLAS KY-NELSON KY-WASHINGTON KY-
MERCER KY-JESSAMINE KY-CLARK KY-LARUE KY-MARION KY-BOYLE KY-
GARRARD KY-MADISON KY-BUTLER KY-EDMONSON KY-HART KY-GREEN KY-
TAYLOR KY-CASEY KY-LINCOLN KY-LOGAN KY-WARREN KY-SIMPSON KY-
ALLEN KY-BARREN KY-MONROE KY-METCALFE KY-ADAIR KY-RUSSELL KY-
CUMBERLAND KY-CLINTON KY-
433 PM EDT (333 PM CDT) WED JUL 18 2007

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTH CENTRAL
INDIANA AND CENTRAL KENTUCKY.

.DAY ONE...TONIGHT.

ISOLATED THUNDERSTORMS ARE POSSIBLE TONIGHT...BUT NO SEVERE WEATHER
IS EXPECTED. THE MAIN THREATS WILL BE CLOUD TO GROUND LIGHTNING
ALONG WITH LOCALLY VERY HEAVY RAIN.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

SCATTERED THUNDERSTORMS WILL DEVELOP DURING THE DAY THURSDAY. THE
THUNDERSTORMS WILL BECOME MORE NUMEROUS THURSDAY NIGHT AS A COLD
DROPS SOUTH ACROSS THE AREA. STRONG STORMS WILL BE POSSIBLE AHEAD OF
THE FRONT ON THURSDAY...AND A FEW SEVERE STORMS COULD OCCUR ALONG
THE FRONT THURSDAY NIGHT. DAMAGING WIND GUSTS... HEAVY RAINFALL AND
DANGEROUS LIGHTNING WILL BE POSSIBLE.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED.

SCHOTT

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PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LOUISVILLE KY
732 PM EDT WED JUL 18 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0725 PM     TSTM WND DMG     LEXINGTON               38.04N 84.46W
07/18/2007                   FAYETTE            KY   BROADCAST MEDIA

            WAL-MART DAMAGED ON NICHOLASVILLE RD

&&

DUNTEN