Area Forecast Discussion
Issued by NWS Charleston, WV

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000 FXUS61 KRLX 230733 AFDRLX Area Forecast Discussion National Weather Service Charleston WV 333 AM EDT TUE AUG 23 2016 .SYNOPSIS... High pressure shifts east today. Increasingly warmer and more humid air as the week progresses...before the next cold front approaches later in the week. && .NEAR TERM /THROUGH TONIGHT/... As of 3 AM Tuesday... Even though the surface high pressure center currently over the Ohio Valley shifts east today...ridging at the surface and aloft will continue to dominate through tonight with tranquil weather. Except for the NAM which is typically overly aggressive with low level moisture...most models agree the area of clouds east of the mountains will basically stay east and tend to dissipate as the day goes low level winds veer into the south and southwest. So after early morning dense river valley fog under this high pressure...abundant sunshine will boost temperatures into the 80s this afternoon with light southerly winds. For tonight...models indicate dry weather with high pressure will still hang on. Expect some more river valley fog early Wednesday morning...but less than this morning as deeper southerly flow does bring in some moisture. However...clouds with this surge of moisture will mostly wait til just after this period. Lows tonight will be a bit milder compared to early this morning. && .SHORT TERM /WEDNESDAY THROUGH FRIDAY NIGHT/... As of 300 PM Monday... Benign weather will continue through the short term as upper ridging transitions across the northeast. Temperatures will slowly climb through the period with dew points rising above 70 F again on Thursday bring a return of the muggies and maybe even a scattered tstorm Thursday. && .LONG TERM /SATURDAY THROUGH MONDAY/... As of 300 PM Monday... A cold front approaches Friday increasing the chance for showers and thunderstorms through the weekend. Still quite a bit of uncertainty on when the front arrives, so not much confidence in pinpointing a time, but for now, early Friday looks like the best bet. GFS starts to bring another front through early next week. && .AVIATION /07Z TUESDAY THROUGH SATURDAY/... As of 2 AM Tuesday... 06Z Tuesday thru 06Z Wednesday... Calm winds and clear skies overnight will result in widespread river and valley LIFR fog by 08Z...affecting all major TAF sites except BKW. Conditions will rapidly improve by 14z to VFR mostly clear with light southerly winds. Some scattered cumulus mostly in the mountains during the afternoon. After 00Z VFR mostly clear with near calm winds...except in higher elevations where winds may still be light southerly. Patchy MVFR/IFR fog by 06z...mainly in sheltered mountain valleys including EKN. and lack of clouds FORECAST CONFIDENCE AND ALTERNATE SCENARIOS THROUGH 06Z WEDNESDAY... FORECAST CONFIDENCE: High. ALTERNATE SCENARIOS: Timing and density of fog may vary early this morning. 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. DATE TUE 08/23/16 UTC 1HRLY 06 07 08 09 10 11 12 13 14 15 16 17 EDT 1HRLY 02 03 04 05 06 07 08 09 10 11 12 13 CRW CONSISTENCY M L M M M M M M H H H H HTS CONSISTENCY M M L M M M L M H H H H BKW CONSISTENCY H H H H H H H H H H H H EKN CONSISTENCY L L L L L L L M H H H H PKB CONSISTENCY M L L L L L L M H H H H CKB CONSISTENCY M M M L L L M H H H H H AFTER 06Z WEDNESDAY... Dense morning valley fog possible through mid week. && .RLX WATCHES/WARNINGS/ADVISORIES... WV...None. OH...None. KY...None. VA...None. && $$ SYNOPSIS...JMV/SL NEAR TERM...JMV SHORT TERM...JW/99 LONG TERM...JW AVIATION...JMV is the U.S. government's official web portal to all federal, state and local government web resources and services.