Area Forecast Discussion
Issued by NWS Charleston, WV

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424 FXUS61 KRLX 290534 AFDRLX Area Forecast Discussion National Weather Service Charleston WV 134 AM EDT THU SEP 29 2016 .SYNOPSIS... A large upper level low brings unsettled weather into the area tonight. This system will affect the area through the work week, before pulling out over the weekend. && .NEAR TERM /THROUGH TODAY/...
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As of 130 AM Thursday...no significant updates needed. As of 1015 PM Wednesday... Have reworked the POPs to include higher values in the near term based on radar trends and high resolution models once again. Also took a glimpse at the new 00Z NAM for comparison sake. In the end, no wholesale changes, but there are some decent increases over the northeast mountains. As of 145 PM Wednesday... A broad and deep upper low over the Great Lakes region will move south over the OH Valley and WV tonight. H500 charts show a vorticity max producing a front for tonight into Thursday. Despite of good forcing, low level moisture is not enough to sustain organize convection. Expect periods of showers or storms which each h500 vorticity maximum through the period.
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&& .SHORT TERM /TONIGHT THROUGH SATURDAY NIGHT/... As of 215 PM Wednesday... Large, anomalously deep upper level low meanders in KY Friday before drifting north over into the weekend. This spells a cool and showery regime, most notably across the northern half of the CWA. As with previous forecasts, the highest pops remain across these locales. We will have to watch for the potential for robust tsra during the afternoon give the shear profiles and mid level lapse rates. Diurnally driven instability accentuated with any breaks in the clouds will ultimately determine just how strong any cells would become. As mentioned, the upper low will pull north into the OH Valley on Saturday. As a result, the upper low will loosen its grip over the region with improving weather. However, there will still be some scattered shra to content with over parts of SE OH. Temps were generally close to previous numbers with the coolest daytime highs across western zones. && .LONG TERM /SUNDAY THROUGH WEDNESDAY/... As of 230 PM Wednesday... The pesky upper low will be out of our hair Sunday. In its wake the region will experience rising heights and warming conditions, potentially to well above normal once again next week. && .AVIATION /06Z THURSDAY THROUGH MONDAY/...
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As of 130 AM Thursday... Upper level low will continue to rotate across the area during the period...with areas of showers...and thunderstorms...particularly after 16-18Z. Expect brief gusty winds...heavy downpours...and MVFR/IFR conditions at times...particularly in vicinity of showers/storms. Bulk of convection will die off after 00Z...however...showers with restrictions...and areas of MVFR/IFR cigs and vsbys will continue to linger for the remainder of the period. FORECAST CONFIDENCE AND ALTERNATE SCENARIOS THROUGH 06Z FRIDAY... FORECAST CONFIDENCE: Medium. ALTERNATE SCENARIOS: Timing of any ceilings lifting to low VFR this afternoon may vary from forecast. Coverage of convection this afternoon...and resultant MVFR/IFR restrictions difficult to pinpoint at this point. 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 THU 09/29/16 UTC 1HRLY 03 04 05 06 07 08 09 10 11 12 13 14 EDT 1HRLY 23 00 01 02 03 04 05 06 07 08 09 10 CRW CONSISTENCY H H H H H H M M M M M L HTS CONSISTENCY H H H L H H H H M M M L BKW CONSISTENCY H H H H L L H H H H H M EKN CONSISTENCY H L H H M M M M M M L L PKB CONSISTENCY H H H H H H M M M M M L CKB CONSISTENCY H H H H L L M M M L L L AFTER 06Z FRIDAY... Areas of ifr possible in showers and thunderstorms through Saturday.
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&& .RLX WATCHES/WARNINGS/ADVISORIES... WV...None. OH...None. KY...None. VA...None. && $$ SYNOPSIS...ARJ/30 NEAR TERM...ARJ/26 SHORT TERM...30 LONG TERM...30 AVIATION...SL

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