Area Forecast Discussion
Issued by NWS Charleston, WV

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000 FXUS61 KRLX 160834 AFDRLX Area Forecast Discussion National Weather Service Charleston WV 334 AM EST Sat Dec 16 2017 .SYNOPSIS... High pressure passes south of the area today and tonight. Weak systems bring some light rain Sunday afternoon into Monday night. Cold fronts cross Tuesday and Friday. && .NEAR TERM /THROUGH TONIGHT/... As of 330 AM Saturday... Low level warm advection should cut off any remaining mountain snow showers early this morning, and break up the stratocu southwest to northeast by late morning. High pressure passes south of the area today and tonight, as upper level ridging builds. All of this will allow for sunshine by this afternoon, and then a mainly clear night tonight. High clouds will start to increase from the southwest toward dawn Sunday, ahead of an upper level low that quickly lifts out of northern Mexico while opening up. Latest guidance was at or below ongoing highs for today, as the atmosphere only mixes through h925. Increased ridge valley differences on lows tonight, in warm advection low level flow that weakens late. The MAV seemed rather low, even for the valleys. && .SHORT TERM /SUNDAY THROUGH TUESDAY NIGHT/... As of 230 AM Saturday... Warmer, and overall drier weather this weekend. A shortwave will move through the region on Sunday, creating a chance for showers. As of now, based on timing of precipitation, have only rain coded in the forecast, but any change in the timing, could result in a brief wintry mix across the north on Sunday. Otherwise, Monday is looking much drier, with another cold front progged for Tuesday/Tuesday night as low pressure moves east across Canada. This period is also looking to be drier, with moisture from southern stream system remaining to our south, and an overall lack of significant moisture from northern system. Expecting just a chance of precipitation, mainly across the higher terrain, with rain and snow showers Tuesday night behind the front. && .LONG TERM /WEDNESDAY THROUGH FRIDAY/... As of 240 AM Saturday... Unsettled weather for the long term period, with another cold front slated for late in the period. Bulk of precipitation during this period will fall as rain, although a transition to light snow is possible for Friday night behind the front, but, as often is the case, by the time enough cold air is in place, moisture will be lacking. Lots of uncertainty exists for the upcoming weekend and beyond but overall pattern looking quite active. && .AVIATION /08Z SATURDAY THROUGH WEDNESDAY/... As of 100 AM Saturday... Warm advection will gradually eradicate any snow showers along higher ridges overnight, and the MVFR stratocu, from south to north, overnight into early Saturday morning. The stratocu, up around 4 kft otherwise, will gradually break up across the lowlands overnight, and across the mountains early Saturday morning. High pressure will then bring VFR conditions for the balance of the day Saturday, and Saturday night. Westerly surface flow, gusty in the mountains, will gradually diminish overnight, becoming light southwest for Saturday. Flow aloft will be moderate west to northwest. FORECAST CONFIDENCE AND ALTERNATE SCENARIOS THROUGH 06Z SUNDAY... FORECAST CONFIDENCE: High. ALTERNATE SCENARIOS: Snow showers could cause brief MVFR visibility restrictions in the northern WV mountains overnight. Timing of MVFR ceilings may vary into Saturday 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 SAT 12/16/17 UTC 1HRLY 08 09 10 11 12 13 14 15 16 17 18 19 EST 1HRLY 03 04 05 06 07 08 09 10 11 12 13 14 CRW CONSISTENCY H H H H H H H H H M M M HTS CONSISTENCY H H H H H H H H H M M M BKW CONSISTENCY H H H H H H H H H M M M EKN CONSISTENCY M M M M M H H H H M M M PKB CONSISTENCY H H H H H H H H H M M M CKB CONSISTENCY H H H H H H H H H M M M AFTER 06Z SUNDAY... IFR in light rain and stratus at times Sunday night through Monday night. && .RLX WATCHES/WARNINGS/ADVISORIES... WV...None. OH...None. KY...None. VA...None. && $$ SYNOPSIS...TRM/SL NEAR TERM...TRM SHORT TERM...SL LONG TERM...SL AVIATION...TRM is the U.S. government's official web portal to all federal, state and local government web resources and services.