Area Forecast Discussion
Issued by NWS Charleston, WV

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000 FXUS61 KRLX 301902 AFDRLX AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE CHARLESTON WV 302 PM EDT THU JUL 30 2015 .SYNOPSIS... A COLD FRONT CROSSES TODAY. MAINLY DRY THROUGH THE WEEKEND EXCEPT FOR LOW CHANCES ACROSS THE NORTH. && .NEAR TERM /THROUGH FRIDAY/... LOWER DEWPOINTS WILL CONTINUE TO MIX DOWN THROUGH THE LATE AFTERNOON HOURS...PROVIDING FOR A COMFY END TO THIS SUMMER DAY. A MAINLY CLEAR SKY WILL RULE TONIGHT WITH SOME DENSE VALLEY FOG DEVELOPING OVERNIGHT. IT MAY TAKE A WHILE TO FORM DEPENDING ON HOW STRONG THE BL WINDS REMAIN OVERNIGHT. TEMPS WILL BOTTOM OUT IN THE 50S TO LOWER 60S. A MAGNIFICENT DAY ON TAP FOR FRIDAY WITH JUST A FEW FLAT CIRRUS. LOOKING AT LOW TO MID 80S WITH THE COMFY AIR REMAINING IN PLACE. && .SHORT TERM /FRIDAY NIGHT THROUGH SUNDAY NIGHT/... REALLY NOTHING HAPPENING UNDER HIGH PRESSURE...EXCEPT FOR A WEAK SURFACE TROUGH FRIDAY NIGHT WHICH WILL BRING A CHANCE OF SHOWERS ALONG THE NORTHERN TIER OF COUNTIES IN SOUTHEAST OHIO AND NORTH CENTRAL WEST VIRGINIA. THIS WILL KEEP TEMPERATURES FROM CLIMBING BACK TO THE 90 DEGREE MARK FOR THE LOWLANDS. && .LONG TERM /MONDAY THROUGH THURSDAY/... GENERAL AGREEMENT IN THE LONG RANGE CONCERNING OVERALL SYNOPTIC EVOLUTION...WITH AN UPPER LEVEL RIDGE ACROSS THE SRN STATES SHIFTING WEST AND A PERSISTENT TROUGH BUILDING ACROSS THE EAST. HOWEVER...THERE IS DISAGREEMENT CONCERNING HOW MUCH THE WESTERN RIDGE WILL AMPLIFY...WHICH INTRODUCES A GOOD BIT OF UNCERTAINTY INTO THE FORECAST. FOR OUR AREA...THIS UNCERTAINTY WILL YIELD RELATIVELY LOW CONFIDENCE IN PRECIP FORECAST AS MODELS ARE HAVING DIFFICULTY RESOLVING SPATIAL AND TEMPORAL EVOLUTION OF WAVES EMBEDDED IN THE LARGER SCALE FLOW. REGARDLESS...THINKING THE PATTERN WILL BECOME DISTURBED ENOUGH FOR SOME RAIN/TSTORMS THROUGH THE UPCOMING WEEK. AS FOR TEMPS...SHOULD SEE SOME BREAK IN THE HIGHER AFTERNOON READINGS OWING TO INCREASED CLOUDS...SLIGHTLY HIGHER RAIN CHANCES...AND OUR INCREASED DISTANCE FROM THE WESTERN RIDGE. && .AVIATION /19Z THURSDAY THROUGH TUESDAY/... VFR CONDITIONS THIS AFTERNOON WILL GIVE WAY TO SOME DENSE RIVER VALLEY FOG OVERNIGHT FOR KCRW/KEKN WHERE VLIFR FOG WAS CODED UP. THINK BL WINDS WILL HOLD UP REMAINING TERMINALS AND LIMIT THEM TO LATE MVFR FOG. ANY FOG WILL QUICKLY ERODE BY 13Z FOR A RETURN TO VFR CONDITIONS WITH JUST SOME FLAT DIURNAL CU. WINDS SFC AND ALOFT WILL REMAIN OUT OF THE NW THIS AFTERNOON AROUND 10 KTS WITH SFC WINDS RELAXING TONIGHT. WINDS BACK AROUND TO MORE WNW FOR FRIDAY WITH GENERALLY 5 TO 10 KTS AT THE SFC. FORECAST CONFIDENCE AND ALTERNATE SCENARIOS THROUGH 18Z FRIDAY... FORECAST CONFIDENCE: MEDIUM-HIGH. ALTERNATE SCENARIOS...TIMING AND EXTENT OF FOG OVERNIGHT IN QUESTION AND HIGHLY DEPENDENT ON BL WINDS. EXPERIMENTAL TABLE OF FLIGHT CATEGORY OBJECTIVELY SHOWS CONSISTENCY OF WFO FORECAST TO AVAILABLE MODEL INFORMATION: H = HIGH: TAF CONSISTENT WITH ALL MODELS OR ALL BUT ONE MODEL. M = MEDIUM: TAF HAS VARYING LEVEL OF CONSISTENCY WITH MODELS. L = LOW: TAF INCONSISTENT WITH ALL MODELS OR ALL BUT ONE MODEL. UTC 1HRLY 18 19 20 21 22 23 00 01 02 03 04 05 EDT 1HRLY 14 15 16 17 18 19 20 21 22 23 00 01 CRW CONSISTENCY H H H H H H H H H H H H HTS CONSISTENCY H H H H H H H H H H H H BKW CONSISTENCY M M M H H H H H H H H H EKN CONSISTENCY M H H H H H H H H H H M PKB CONSISTENCY H H H H H H H H H H H H CKB CONSISTENCY H H H H H H H H H H H H AFTER 18Z FRIDAY... RIVER VALLEY IFR FOG POSSIBLE EARLY SATURDAY MORNING. && .RLX WATCHES/WARNINGS/ADVISORIES... WV...NONE. OH...NONE. KY...NONE. VA...NONE. && $$ SYNOPSIS...30/26/DTC NEAR TERM...30 SHORT TERM...JW LONG TERM...DTC/26 AVIATION...30

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