Severe Thunderstorm Warning 253, NWS Paducah, KY

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PADUCAH KY
125 PM CDT WED JUL 23 2003

UPDATE...WILL GO AHEAD AND USE SCATTERED TERMINOLOGY BASED ON LATEST
RADAR TRENDS. COVERAGE MAY END UP BEING A LITTLE MORE THAN ISOLATED
THROUGH THE END OF THE DAY. THE ZFP BREAK OUT FOR THIS EVENING...WILL
HAVE SCT SHRA/TSRA EAST OF A LINE FROM FAIRFIELD IL TO MURRAY KY.
ROUGHLY 30 PERCENT POPS. OTHERWISE...BELOW IS THE ORIGINAL
DISCUSSION.

EARLY THIS AFTERNOON...RADAR SHOWED ISOLATED SHRA FROM ALONG THE
WABASH RIVER SOUTH TO NEAR HOPKINSVILLE KY. DECENT LOW LEVEL MOISTURE
COUPLED WITH THE H5 COLD CORE MOVING OVER SW INDIANA AND WRN KENTUCKY
WILL CONTINUE TO OFFER UP CU OVER THE FA THROUGH LATE IN THE
DAY...WITH ISOLATED SHRA OVER SW INDIANA AND THE PENNYRILE REGION OF
WEST KENTUCKY CLOSER TO THE UPPER TROF. WILL KEEP A MENTION OF
ISOLATED SHRA/TSRA GOING FOR LATE TODAY. EVENING SHIFT CAN REMOVE
WHEN NECESSARY. FOR TONIGHT...MODELS CONTINUE A SLOW EASTWARD
PROGRESSION OF THE UPPER TROF. FAIRLY STRONG SFC HIGH PRESSURE OVER
THE UPPER MIDWEST WILL CONTINUE TO BUILD SOUTH TONIGHT.
HOWEVER...WITH THE SLOW DEPARTURE OF THE UPPER TROF AND LOWER LEVEL
MOISTURE PER THE ETA AND AVN...WILL DECREASE CLOUDS TONIGHT...BUT
KEEP A LOW PERCENTAGE COVERAGE IN THE GRIDS TO ACCOUNT FOR SOME
CLOUDS AT TIMES...SIMILAR TO LAST NIGHT. BASED ON LATEST MAV AND
MESOETA SFC TEMPS...WILL NUDGE UP OUR LOWS TONIGHT A COUPLE OF
DEGREES. 7/24/03 AM LOWS SHOULD STAY ABOVE RECORDS...WHICH ARE 53
DEGREES AT PADUCAH SET IN 2000...AND 51 DEGREES AT EVANSVILLE SET IN
1947.

LITTLE CHANGE TO THE FORECAST DAYS TWO THROUGH SEVEN. THE UPPER AIR
FLOW REGIME WILL CONTINUE TO BE AMPLIFIED BY A STRONG AND PERSISTENT
RIDGE OVER THE WEST AND SOUTHWEST U.S....WITH AN UPPER TROF OVER THE
EAST U.S....ALBEIT A WEAKENING ONE THAT SHOULD TRANSLATE A BIT
FURTHER EAST THURSDAY AND FRIDAY. SURFACE HIGH PRESSURE WILL BE THE
MAIN WEATHER FEATURE THROUGH SATURDAY...AS IT MOVES FROM THE UPPER
MIDWEST THIS AFTERNOON...TO THE MID ATLANTIC STATES BY MIDDAY
FRIDAY. DRY WEATHER EXPECTED THURSDAY THROUGH SATURDAY...WITH
TEMPERATURES SLOWLY MODERATING ON THE BACKSIDE OF THE HIGH. ON
SATURDAY...GFS ADVERTISES A WEAK UPPER LEVEL DISTURBANCE AND SFC
REFLECTION MAY DRIFT FAR ENOUGH NORTH TO BRING A FEW MORE CLOUDS TO
WEST KENTUCKY BY SATURDAY. UNTIL THEN EXPECT MAINLY SOME CU DURING
THE DAY...DIMINISHING AT NIGHT.

GFS SLOWS THE ARRIVAL TIME OF THE FRONT SLATED TO MOVE INTO THE
REGION SOMETIME SUNDAY. IT SUGGESTS MOST OF THE ACTIVITY MAY HOLD
OFF UNTIL THE AFTERNOON HOURS. IN ADDITION...THE MODEL IS LESS
PROGRESSIVE WITH THE FRONTS SOUTHWARD MOVEMENT. NEVER THE
LESS...STILL APPEARS TO BE A CHANCE EACH DAY SUNDAY THROUGH TUESDAY.
CONFIDENCE IN TIMING AND PLACEMENT STILL A BIT LOW THIS FAR OUT...SO
WILL HAVE LESS DETAIL IN THE ZONES...AND LIMIT ANY ADDITIONAL
DETAILS TO THE GRIDS. GENERALLY USED MEX/HPC PROJECTED NUMBERS.

.PAH...NONE.

ILZ075>078-080>094-INZ081-082-085>088-KYZ001>022-MOZ076-086-087-100-
107>112-114-241000-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE PADUCAH KY
200 PM CDT WED JUL 23 2003

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST MISSOURI...SOUTHERN
ILLINOIS...SOUTHWEST INDIANA AND WESTERN KENTUCKY.

.DAY ONE...THIS AFTERNOON AND TONIGHT

SCATTERED SHOWERS AND THUNDERSTORMS WILL CONTINUE THIS AFTERNOON AND
EARLY THIS EVENING...GENERALLY OVER SOUTHEAST ILLINOIS...SOUTHWEST
INDIANA AND THE PENNYRILE REGION OF WEST KENTUCKY. MOST OF THE
CONVECTION SHOULD STAY EAST OF A LINE FROM ABOUT FAIRFIELD ILLINOIS
TO MURRAY KENTUCKY. ANY OF THE STORMS MAY BRIEFLY BECOME
SEVERE...WITH HAIL PENNY TO NICKEL SIZE THE MOST LIKELY HAZARD.

WITH SUNSET...AND THE LOSS OF DAYTIME HEATING...THE THUNDERSTORMS
SHOULD DIMINISH THIS EVENING...WITH DRY CONDITIONS EXPECTED
OVERNIGHT.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

THERE IS A CHANCE OF SHOWERS AND THUNDERSTORMS SUNDAY THROUGH
TUESDAY. THE PROBABILITY OF WIDESPREAD HAZARDOUS WEATHER IS LOW.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION COULD BE REQUESTED LATE THIS AFTERNOON AND EARLY
THIS EVENING.