Area Forecast Discussion
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000 FXUS61 KPBZ 250917 AFDPBZ Area Forecast Discussion National Weather Service Pittsburgh PA 517 AM EDT Tue Jul 25 2017 .SYNOPSIS... Dry conditions and near-normal temperatures can be expected until showers and thunderstorms return Thursday through Friday morning. Dry conditions will then resume and persist through the weekend. && .NEAR TERM /UNTIL 6 PM THIS EVENING/...
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Quick update to hourly temperatures and cloud coverage early this morning. No other adjustments were needed. Previous discussion follows.. Overnight stratus north of Interstate 70 will mitigate falling temperatures and fog formation overnight. South of I-70 clearing may result in some valley fog as winds relax toward morning. Clouds will clear during the day under building high pressure and subsidence with mostly sunny skies across the region by mid-afternoon.
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&& .SHORT TERM /6 PM THIS EVENING THROUGH WEDNESDAY NIGHT/... Ridging will continue to build through midweek with a drying boundary layer and overall subsidence supporting a dry, seasonable forecast through Wednesday night. && .LONG TERM /THURSDAY THROUGH MONDAY/... Models show decent continuity in the extended with an upper level trough and associated front crossing the forecast area Thursday through Friday morning. Showers and storms along the boundary are likely. Overall model consensus shows troughing east of the forecast area by Friday evening...and with drier, more stable air moving in behind....a dry and sunny weekend is most probable at this time. && .AVIATION /09Z TUESDAY THROUGH SATURDAY/... Ceilings will fall to low MVFR or even IFR during the overnight period as an encroaching cooler air mass supports a stratus deck. Southern terminals like MGW and ZZV should see the least impact and may remain VFR. Patchy valley fog/mist is also a possibility, especially where the winds can decouple. Stratus should erode by midday across the region under high pressure, with VFR and light winds ruling the rest of the period. .OUTLOOK... VFR is expected to prevail through mid-week as high pressure builds maintains over the region. Moisture will return Thu ahead of a sewd- moving trough. && .PBZ WATCHES/WARNINGS/ADVISORIES... MD...None. OH...None. PA...None. WV...None. && $$

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