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Area Forecast Discussion
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000
FXUS61 KILN 232117
AFDILN

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE WILMINGTON OH
417 PM EST SUN NOV 23 2014

.SYNOPSIS...
A DEEPENING LOW PRESSURE SYSTEM WILL PULL A LARGE SWATH OF
SHOWERS NORTHWARD INTO THE REGION TONIGHT. A STRONG COLD FRONT
WILL SWING ACROSS THE AREA MONDAY BRINGING ADDITIONAL SHOWERS
ALONG WITH WINDY CONDITIONS. COLDER AIR WILL RUSH IN BEHIND THE
FRONT AND WILL LINGER FOR THE MIDDLE OF THE WEEK.

&&

.NEAR TERM /THROUGH TONIGHT/...
DEEPENING LOW PRESSURE WILL TRAVEL TO THE WESTERN GREAT LAKES
TONIGHT AS DEPICTED ON MODELS FOR THE LAST SEVERAL RUNS. IN A BAND
OF STRONG ISENTROPIC LIFT EXTENDING SOUTHEAST OF THE LOW
CENTER...RAIN SHOWERS ARE DEVELOPING AND MOVING ACROSS THE ENTIRE
AREA THROUGH EARLY TONIGHT. KEPT CATEGORICAL POPS. MODEL QPF
SUPPORTED BY RADAR TRENDS SHOW ABOUT AN INCH OF RAINFALL TONIGHT.
SHOWERS WILL START TO DIMINISH LATER TONIGHT AS A DRY SLOT WORKS
IN BEHIND THE MAIN BAND OF LIFT AND MOISTURE. LOW TEMPERATURES
WILL STAY MILD IN THE LOWER 50S IN A WELL MIXED AND INSULATED
REGIME.

&&

.SHORT TERM /MONDAY THROUGH TUESDAY NIGHT/...
COLD FRONT WILL BE SWINGING IN FROM THE WEST MONDAY MORNING. A
BAND OF SHOWERS FORMING ALONG THE FRONT IS FORECAST TO PUSH ACROSS
THE AREA WITH THE FRONT. MODELS INDICATE MARGINAL INSTABILITY
THAT MAY BE ENOUGH TO TRIGGER A FEW THUNDERSTORMS WITH THE
SHOWERS. INSTABILITY IS SHOWN TO LIFT NORTHWARD AWAY FROM THE ILN
AREA BY NOON MONDAY...GIVING A BETTER CHANCE FOR THUNDERSTORMS IN
WESTERN LOCATIONS. DRIER AIR WILL WORK IN MONDAY AFTERNOON AS THE
FRONT TRAVELS EAST OF THE AREA.

A VERY TIGHT PRESSURE GRADIENT SURROUNDING THE FRONT WILL BRING
STRONG WINDS. GUIDANCE INDICATES GUSTS CLOSE TO 50 MPH THAT WILL
NECESSITATE A WIND ADVISORY. AS IS OFTEN THE CASE WITH SYNOPTIC
SCALE WIND EVENTS...A TIGHTER PRESSURE GRADIENT AND GREATER
PRESSURE CHANGE CLOSER TO THE LOW CENTER WILL RESULT IN HIGHER
GUSTS IN NORTHERN LOCATIONS SUCH AS DAY.

FOR MONDAY NIGHT THROUGH TUESDAY NIGHT...SURFACE HIGH PRESSURE
ARRIVING ON A SOUTHWEST FLOW ALOFT SHOULD PROVIDE DRY WEATHER
...THOUGH A FEW SNOW SHOWERS MAY OCCUR OVER FAR NORTHERN LOCATIONS
MONDAY NIGHT INTO TUESDAY AFTERNOON.

TEMPERATURES WILL STAY MILD TO START MONDAY WITH HIGHS IN THE 50S.
READINGS WILL FALL IN THE AFTERNOON WITH COLD FRONTAL PASSAGE.
BELOW NORMAL HIGHS IN THE UPPER 30S ARE EXPECTED FOR TUESDAY.

&&

.LONG TERM /WEDNESDAY THROUGH SATURDAY/...
COLDER THAN NORMAL TEMPERATURES WITH MEAN TROF AND BELOW NORMAL 
HEIGHTS OVER THE NATIONS MID SECTION TO START THE LONG TERM FORECAST 
PERIOD. 

LARGE RIDGE OVER THE WEST COAST WITH MEAN TROF OVER THE NATIONS MID 
SECTION AT MID WEEK. OHIO VALLEY BETWEEN SYSTEMS WITH DEPARTING SFC 
HIGH PRESSURE TO THE EAST AND APPROACH OF NEXT CLIPPER SYSTEM. WILL 
CONTINUE DRY FCST THRU THE DAYLIGHT HOURS ON WED. BELOW NORMAL 
TEMPERATURES TO CONTINUE WITH HIGHS RANGING FROM THE MID 30S 
NORTHWEST TO THE LOWER 40S SOUTHEAST. 

FOCUS SHIFTS TO WEAKENING CLIPPER LOW DROPPING SE FROM THE UPPER MS 
VLY WED AFTN THRU THE OHIO VALLEY WED NIGHT. NUMERICAL MODELS HAVE 
BEEN FLIPPING BACK AND FORTH REGARDING HOW FAR SOUTH THIS SYSTEM 
DIGS AND TIMING. LATEST DETERMINISTIC RUNS TAKING WEAK SFC WAVE FROM 
CENTRAL IL LATE WED AFTN THRU THE TRI-STATE REGION WED NIGHT. WILL 
BRING SNOW IN WED EVENING AND CONTINUE INTO THURSDAY. SOME PCPN MIX 
WILL BE POSSIBLE ACRS THE SOUTHEAST. HIGHS ON THURSDAY TO RANGE FROM 
THE LOWER/MID 30S NW TO LOWER 40 SE. 

IN NORTHWEST FLOW AND CAA SOME LINGERING SNOW SHOWERS PSBL THURSDAY 
NIGHT. SFC HIGH PRESSURE TO QUICKLY BUILD ACRS THE REGION EARLY ON 
FRIDAY WITH A RETURN FLOW DEVELOPING BY AFTN. WAA PCPN TO DEVELOP 
DURG THE AFTN WITH THE BULK OF PCPN STAYING TO OUR NORTH. WILL KEEP
AREA DRY THRU FRIDAY NIGHT. CONTD COLD TEMPERATURES WITH HIGHS ON 
FRIDAY TO RANGING FROM THE LOWER 30S NW TO THE UPR 30S SE.

WAA PCPN LOOKS TO DEVELOP SAT AFTN BUT WITH MORE UNCERTAINTY 
CREEPING INTO THE FCST REGARDING PLACEMENT/TIMING WILL LIMIT POPS TO 
SLIGHT CHANCE OF SHOWERS. THE RAIN COULD MIX OR CHANGE TO SNOW SAT 
NIGHT. GFS SOLN APPEARS TOO QUICK WITH COLD FRONTAL PASSAGE. WILL 
TREND SOLN CLOSER TO SLOWER ECMWF WITH FRONT HOLDING OFF UNTIL EARLY 
MONDAY. IN WAA SECTOR CHANCE OF SHOWERS WILL CONTINUE SUNDAY. 
TEMPERATURES WILL MODERATE WITH HIGHS ON SUNDAY FROM UPPER 30S
NORTHWEST TO THE UPPER 40S SOUTH.

&&

.AVIATION /20Z SUNDAY THROUGH FRIDAY/...
THE TAF SITES WILL BEGIN THE FORECAST PERIOD GENERALLY DRY...BUT A
SOLID AREA OF RAIN IS EXPECTED TO MOVE IN DURING THE LATE
AFTERNOON AND EVENING HOURS. THIS RAIN IS EXPECTED TO CONTAIN MVFR
VISIBILITIES...WITH A CHANCE OF A FEW POCKETS OF HEAVIER RAIN THAT
MAY LEAD TO IFR VISIBILITIES. CEILINGS ARE GENERALLY EXPECTED TO
REMAIN MVFR DURING THE RAIN IN THE EVENING...BUT A GRADUAL
LOWERING SHOULD LEAD TO IFR CEILINGS HEADING INTO THE OVERNIGHT
HOURS. CENTRAL OHIO MAY BE A SLIGHT EXCEPTION...AS THE AMOUNT OF
MOISTURE WILL BE SLIGHTLY LESS...MAKING IFR CEILINGS AND HEAVY
RAIN A LITTLE LESS LIKELY. CEILINGS SHOULD BE AT THEIR LOWEST
DURING THE OVERNIGHT HOURS...BUT WILL BEGIN TO IMPROVE DURING THE
MORNING.

OCCASIONAL SHOWERS WILL CONTINUE TO BE POSSIBLE THROUGH THE REST
OF THE FORECAST...BUT WINDS WILL BE THE MAIN IMPACT ON MONDAY. AS
WIND FLOW SWITCHES FROM SOUTHEAST TO SOUTHWEST DURING THE FORECAST
PERIOD...SPEEDS WILL STEADILY INCREASE. GUSTS INTO THE 15-20 KNOT
RANGE SHOULD BEGIN LATER TODAY (SUNDAY)...AND WINDS ARE LIKELY TO
CONTINUE INCREASING DURING THE OVERNIGHT HOURS. ON MONDAY
MORNING...WIND GUSTS OF OVER 30 KNOTS APPEAR VERY LIKELY...AND
SOME WIND GUSTS MAY BE AS HIGH AS 40 KNOTS. THE CHANCE FOR RAIN
WILL END BY LATE MORNING AS A COLD FRONT MOVES THROUGH...BUT GUSTY
SOUTHWEST WINDS OF 25-35 KNOTS MAY CONTINUE THROUGH THE AFTERNOON
ON TUESDAY.

OUTLOOK...MVFR CEILINGS AND GUSTY WINDS WILL CONTINUE THROUGH
MONDAY AFTERNOON. MVFR CEILINGS MAY BE POSSIBLE AGAIN HEADING INTO
TUESDAY. MVFR CONDITIONS WILL BE POSSIBLE AGAIN ON THURSDAY.

&&

.ILN WATCHES/WARNINGS/ADVISORIES...
OH...WIND ADVISORY FROM 7 AM TO 10 PM EST MONDAY FOR OHZ026-034-035-
     042>046-051>056-060>065-070>074-077>082-088.
KY...WIND ADVISORY FROM 7 AM TO 10 PM EST MONDAY FOR KYZ089>100.
IN...WIND ADVISORY FROM 7 AM TO 10 PM EST MONDAY FOR INZ050-058-059-
     066-073>075-080.

&&

$$
SYNOPSIS...CONIGLIO/SITES
NEAR TERM...CONIGLIO
SHORT TERM...CONIGLIO
LONG TERM...AR
AVIATION...HATZOS







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