Area Forecast Discussion
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858 FXUS61 KPBZ 271644 AFDPBZ Area Forecast Discussion National Weather Service Pittsburgh PA 1244 PM EDT WED JUL 27 2016 .SYNOPSIS... Warm and mainly dry conditions can be expected until the approach of low pressure later tonight and on Thursday. && .NEAR TERM /UNTIL 6 PM THIS EVENING/...
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Early afternoon update to adjust max temperatures up a degree or two most locations based on noon readings. No other changes and previous discussion follows. Weak boundary looks to be near or just south of Interstate 70 late morning based on current observations, with dew points still near 70 south of the boundary. Expect isolated to scattered showers and thunderstorms to develop late afternoon along this region, so no changes were made to POPs. Adjusted sky cover with more sunshine across the north late this morning. No changes to previous forecasted max temperatures.
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&& .SHORT TERM /6 PM THIS EVENING THROUGH FRIDAY/... POPs will be on the increase with the approach of low pressure on Thursday. For now, highest POPS and QPF resides over the southeast portions of the forecast area where the track of the low should progress. Still seeing model differences in the path of surface wave and the upper level support which will enhance it Thursday afternoon and Thursday night. System will slowly exit Friday decreasing pop and cloud coverage. && .LONG TERM /FRIDAY NIGHT THROUGH TUESDAY/... A series of shortwaves and development of a broad, but shallow trough over the Eastern CONUS is forecast to support periodic rain chances and seasonal temperatures through the weekend. Ridging should return dry weather by the middle of next week. && .AVIATION /18Z WEDNESDAY THROUGH MONDAY/... Mainly VFR conditions are expected through tonight for ports north of I 70 under high pressure. Low level moisture pooling with a stalled surface front south of I 70 should maintain MVFR ceilings until mixing lifts cloud bases to VFR levels by afternoon. Some patchy MVFR fog is possible near dawn. .OUTLOOK /THURSDAY THROUGH SUNDAY/... Low pressure could result in restrictions late Thursday and Friday, with upper troughing maintaining periodic restriction chances through the weekend. && .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.