Area Forecast Discussion
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000 FXUS61 KPBZ 270823 AFDPBZ Area Forecast Discussion National Weather Service Pittsburgh PA 423 AM EDT Thu Oct 27 2016 .SYNOPSIS... Low pressure will bring rain to the region today. Dry and cool weather returns Friday. Warmer but unsettled weather is anticipated for the weekend. && .NEAR TERM /UNTIL 6 PM THIS EVENING/... Surface cold front will slowly move through the area today. Showers will proceed the front and eventually usher in much colder air. Expect a period of rain during the early morning hours then another round just ahead of the aforementioned front. Will continue with idea of keeping highest probabilities over the north as these locations will be closer to the main surface low. Front should reach PIT early this afternoon and then drift east of the region by early evening. Ahead of the surface boundary, temperatures will be near normal, but slowly falling temperatures are expected on back side of front. && .SHORT TERM /6 PM THIS EVENING THROUGH SATURDAY/... Cold advection behind the departing low pressure will be brief, but shower chances will continue tonight, mainly over the north and east. Some snow may mix in as well, especially north of I-80 and in the high terrain. Expect any precipitation to end late tonight as inversions lower. High pressure will settle over the Ohio Valley Friday, with decreasing cloud cover as warm air advection ensures. With the progressive upper level pattern, another system is expected to approach late on Saturday. However, models are still showing little agreement on how much impact, precipitation wise, this next system will have on the area. Felt a model blend was best for the Saturday forecast. Strong warm advection Saturday, will allow for temperatures 5-10 degrees above seasonal averages. && .LONG TERM /SATURDAY NIGHT THROUGH WEDNESDAY/... The models are in relatively good agreement for the start of the long term, with another shortwave expected to cross along a slow moving boundary over the Ohio Valley on Sunday. After this time, the models evolve the next low pressure system over the northern Plain/Canadian border differently, so a blend of model guidance was used. Overall, expect temperatures to remain at or just slightly above seasonal averages through the period. && .AVIATION /09Z THURSDAY THROUGH MONDAY/...
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Main concern overnight will be potential for LLWS as surface winds have decoupled from stronger winds already being observed via VWP observations. LLWS potential will continue into morning. The potential will lessen somewhat as surface winds increase this morning. CIGS/VIS will remain VFR for a bit longer before MVFR and then IFR conditions approach from the NW as rainfall and then a cold front moves toward and through the area. These will linger into tonight. .OUTLOOK /WEDNESDAY THROUGH SUNDAY/... VFR returns by Friday. More restrictions are possible this weekend with another front.
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&& .PBZ WATCHES/WARNINGS/ADVISORIES... MD...None. OH...None. PA...None. WV...None. && $$ is the U.S. government's official web portal to all federal, state and local government web resources and services.