Area Forecast Discussion
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000 FXUS61 KPBZ 220119 AFDPBZ Area Forecast Discussion National Weather Service Pittsburgh PA 919 PM EDT Wed Jun 21 2017 .SYNOPSIS... Chances of showers and storms will continue into the weekend. Cooler weather arrives next week. && .NEAR TERM /UNTIL 6 AM THURSDAY MORNING/...
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As expected, showers continue to decrease in coverage, with all locations expected to be dry by midnight. Although high clouds across the northern half of the forecast area have cleared out, IR satellite shows cloud cover south of the region moving north, and this trend will continue overnight. Deeper saturation should return with a warm front, and modest lift along it will start to generate an increasing chance of showers late tonight into Thursday morning as it moves northeastward.
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&& .SHORT TERM /6 AM THURSDAY MORNING THROUGH SATURDAY/... Much warmer and more humid air will push into the region on Thursday as the area emerges into the warm sector. Southwesterly flow and increased mixing depths should likewise allow for temperatures to run up fairly aggressively in the afternoon. This will occur as 850 mb temperatures jump up into the upper teens Celsius. The more interesting weather comes late Thursday night through Friday night as the remnants of TS Cindy recurve toward the Middle Atlantic. The model consensus suggests the heaviest rainfall associated with the remnants will either just scrape the southern fringe of the area or remain south of the area. However, tropical moisture will be streaming northward into the area on southwesterly flow through the period. As a cold front dives toward the area Friday, PWATs ahead of it surge toward 2.1 inches, roughly double climo. As such, warm rain processes and moderate instability will likely mean heavy rainfall along the front as it passes through the area, even if the remnants of TS Cindy remain to the south. This will be monitored going forward. Drier air sags toward the area on Saturday as the cold front pushes eastward. This will allow for the area to finally start to dry out and cool down. && .LONG TERM /SATURDAY NIGHT THROUGH WEDNESDAY/... A stark shift in the upper level pattern looks to occur by early next week. Model and ensemble projections all favor deep troughing settling over the region by that juncture. With this, much colder air aloft combined with northwesterly surface flow will mean temperatures well below normal with chances of showers as cold air aloft migrates through the region. && .AVIATION /01Z THURSDAY THROUGH MONDAY/...
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Showers have moved east of terminals for the evening, and general VFR is expected through the period. Frontal boundary near ZZV and MGW will be pulled northward on Thursday with the chance for scattered convective activity continuing. .OUTLOOK... Widespread restrictions are likely Friday and Friday night with the encroachment of a cold front.
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&& .PBZ WATCHES/WARNINGS/ADVISORIES... MD...None. OH...None. PA...None. WV...None. && $$

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