Area Forecast Discussion
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000 FXUS61 KPBZ 241559 AFDPBZ Area Forecast Discussion National Weather Service Pittsburgh PA 1159 AM EDT Mon Apr 24 2017 .SYNOPSIS... Low pressure tracking along the East Coast should result in periodic rain chances mainly east of I 79 early in the week. Dry and warm weather is expected with mid week high pressure. && .NEAR TERM /THROUGH TUESDAY/... Latest satellite imagery showing the cloud shield has made very little northward advancement. These clouds will slowly creep northward this afternoon as the southeastern CONUS low turns the corner and moves northeast. Rain chances will ramp back up this afternoon across the Ridges as mid-level dry air evacuates and moisture begins to advect back in from the Mid- Atlantic. Away from the high terrain, a lack of organized ascent will necessitate only slight rain chances through the night. The upper low will track along the coast Tuesday, keeping us on along the northwestern periphery of the system. Rain chances will remain best confined to the higher elevations, but a weak area of deformation could spill rain west, closer to Pittsburgh during the day Tuesday. Temperatures tonight will be above seasonal averages with uniform cloud cover. Another west to east gradient of high temperatures is expected Tuesday as cool air advects into the eastern zones, under overcast skies. && .SHORT TERM /TUESDAY NIGHT THROUGH WEDNESDAY NIGHT/... Rain chances should end Tuesday night as the low begins to pull away from the coast. Building ridging on Wednesday should result in dry and warm weather, with temperatures in the mid 70s to around 80 expected. && .LONG TERM /THURSDAY THROUGH SUNDAY/... Ridging is progged to shift east early in the period as a trough advances out of the Midwest, returning rain chances to the forecast. Gradually increasing heights and SW upper flow are expected through the weekend in response to a deepening wrn CONUS trough. Embedded shortwaves in the SW flow should result in periodic shower/thunderstorm chances from late week through the weekend. Temperatures are expected to average 10-20 degrees above seasonal levels. && .AVIATION /16Z MONDAY THROUGH FRIDAY/... VFR will be predominate for the TAF period as easterly flow continues to funnel moisture against the ridges. Light rain chances will generally be confined to LBE and MGW. A fairly tight pressure gradient will supports gusts near 20 kts this afternoon. .Outlook... The next chance for general restrictions is expected with mid week low pressure. && .PBZ WATCHES/WARNINGS/ADVISORIES... MD...None. OH...None. PA...None. WV...None. && $$

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