Area Forecast Discussion
Issued by NWS Wilmington, OH

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000 FXUS61 KILN 160456 AFDILN AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE WILMINGTON OH 1256 AM EDT TUE SEP 16 2014 .SYNOPSIS... AN UPPER LEVEL DISTURBANCE AND ASSOCIATED WEAK COLD FRONT WILL PASS THROUGH THE GREAT LAKES AND OHIO VALLEY OVERNIGHT. HIGH PRESSURE AND A DRY AIRMASS ARE ANTICIPATED FOR TUESDAY NIGHT THROUGH SATURDAY. A COLD FRONT IS EXPECTED TO PROVIDE A CHANCE OF SHOWERS AND THUNDERSTORMS ON SUNDAY. && .NEAR TERM /UNTIL 6 AM THIS MORNING/... MAJORITY OF SHOWERS HAVE EVOLVED IN THE POST-FRONTAL ENVIRONMENT TO BECOME SCATTERED IN NATURE. THERE IS A LARGE SWATH OF DRIZZLE BEHIND IT WHICH WILL MOVE ACROSS CWA AND END NW-SE LATE IN THE OVERNIGHT PERIOD. TEMPS AND OTHER FCST PARAMETERS WERE GENERALLY UNCHANGED OTHER THAN BLENDING CURRENT TREND TO THE FCST. && .SHORT TERM /6 AM THIS MORNING THROUGH WEDNESDAY NIGHT/... A FEW SHOWERS MAY LINGER TUESDAY MORNING SOUTH OF THE OHIO RIVER BEHIND THE DEPARTING FRONT. OTHERWISE...HIGH PRESSURE WILL BEGIN TO BUILD IN FROM THE NORTHWEST. CONSIDERABLE CLOUDINESS WILL LINGER THROUGH THE MORNING WITH SKIES GRADUALLY BECOMING PARTLY CLOUDY THROUGH THE AFTERNOON HOURS. THE HIGH WILL REMAIN OVER THE REGION THROUGH WEDNESDAY. THE ASSOCIATED DRY AIRMASS AND DOWNWARD MOTION WILL RESULT IN PERIOD OF MAINLY CLEAR AND RATHER COOL CONDITIONS. HIGHS TUESDAY MAINLY IN THE 60S WILL BE BUMPED UP A COUPLE DEGREES TOWARD 70 ON WEDNESDAY. LOWS WILL BE PRIMARILY IN THE 40S...WITH SOME 50S SOUTH OF THE OHIO RIVER ON WEDNESDAY NIGHT. && .LONG TERM /THURSDAY THROUGH MONDAY/... HIGHLY AMPLIFIED MID/UPR LEVEL FLOW CHARACTERIZED BY STRONG RIDGE OVER THE ROCKIES AND MEAN TROF OVER EASTERN NORTH AMERICA AT MID WEEK. THIS PLACES THE OHIO VALLEY IN NORTHWEST FLOW REGIME. A WEAKENING COLD FRONT TO DROP SOUTH ACROSS THE GREAT LAKES WEDNESDAY NIGHT AND WASH OUT. BROAD SFC HIGH PRESSURE OF CANADIAN ORIGIN TO BUILD SE ACRS THE GREAT LAKES THRU THE END OF THE WEEK. DRY AND COOL WEATHER TO CONTINUE THURSDAY WITH HIGHS AGAIN FROM THE UPPER 60S NORTH TO THE LOWER 70S SOUTH. MID LEVEL FLOW WILL BECOME MORE WESTERLY WITH THE CENTER OF SFC HIGH PRESSURE TRACKING INTO NEW ENGLAND. A LOW LEVEL SOUTHERLY FLOW WILL DEVELOP ON THE BACKSIDE OF RE-TREATING SFC HIGH. THIS WILL ALLOW FOR A SLIGHT MODIFICATION OF TEMPERATURES WITH HIGHS ON FRIDAY FROM THE LOWER 70S NORTH TO THE UPPER 70S SOUTH. MID LEVEL FLOW BACKS SOUTHWESTERLY AHEAD OF MID LEVEL TROF DEVELOPING OVER THE NORTH CENTRAL US. WILL KEEP THE AREA DRY ON SATURDAY AND WILL ALLOW FOR A WARM UP. EXPECT HIGHS FROM THE UPPER 70S NORTH TO AROUND 80 SOUTH. PROGRESSIVE MID LEVEL TROF TO TRANSLATE EAST WITH ASSOCIATED SFC COLD FRONT PUSHING INTO THE OHIO VALLEY SUNDAY. WILL INTRODUCE CHANCE POPS LATE SATURDAY NIGHT AND INTO THE NORTHWEST AND ACRS THE ENTIRE FA SUNDAY. && .AVIATION /06Z TUESDAY THROUGH SATURDAY/... WEAK LOW PRESSURE WILL TRAVERSE THE OHIO VALLEY THIS EVENING. AS IT RIPPLES BY...A WEAK COLD FRONT WILL PUSH SOUTHEAST THROUGH THE AREA. SHOWERS WILL BE MOST NUMEROUS THIS EVENING...THEN TAPER OFF TO A LOW CHANCE ALONG AND JUST BEHIND THE COLD FRONT. MODELS INDICATE THAT THE LOWER LEVELS OF THE ATMOSPHERE WILL BECOME SATURATED OVERNIGHT BEHIND THE FRONT. THIS WILL RESULT IN THE DEVELOPMENT OF IFR/LIFR CEILINGS. DESPITE A NORTH WIND OF 5 TO 10 KNOTS...SOME MVFR VISIBILITIES WILL ALSO BE POSSIBLE. ON TUESDAY...LOW CLOUDS WILL LINGER INTO MOST OF THE MORNING. THE COMBINATION OF DRIER AIR MOVING IN FROM THE NORTH AND DAYTIME HEATING SHOULD EVENTUALLY ALLOW CEILINGS TO LIFT TO VFR BY EARLY TO MID AFTERNOON. SURFACE HIGH PRESSURE WILL BUILD INTO THE AREA TUESDAY NIGHT...RESULTING IN CLEARING SKIES. OUTLOOK...NO SIGNIFICANT WEATHER IS EXPECTED. && .ILN WATCHES/WARNINGS/ADVISORIES... OH...NONE. KY...NONE. IN...NONE. && $$ SYNOPSIS...CONIGLIO/HICKMAN NEAR TERM...FRANKS SHORT TERM...CONIGLIO/HICKMAN LONG TERM...AR AVIATION...HICKMAN

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