Area Forecast Discussion
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000 FXUS61 KPBZ 220409 AFDPBZ Area Forecast Discussion National Weather Service Pittsburgh PA 1209 AM EDT Sat Apr 22 2017 .SYNOPSIS... Low pressure tracking across the Tennessee Valley and Southeast United States will result in rain chances this weekend, mainly south of I 70. && .NEAR TERM /UNTIL 6 AM THIS MORNING/... An approaching upper trough and developing surface low pressure is expected to return rain chances tonight south of I 80, with the best chance expected along and S of the I 70 corridor where more favorable moisture/lift is progged. Lows are expected to average a few degrees above seasonal levels. && .SHORT TERM /6 AM THIS MORNING THROUGH MONDAY/... Low pressure in conjunction with a crossing northern stream upper trough is likely to generate rain south of the I 70 corridor on Saturday, then funnel moisture across I 68 through the weekend as it digs over the Southeast Conus. Have maintained chance POPs for that area into Monday with limitations expected from weak dynamics on the northern periphery of the low. Seasonal temperature can be expected throughout and only minor alterations were completed. && .LONG TERM /MONDAY NIGHT THROUGH FRIDAY/... Dry weather and moderating temperature is expected next week as ridging ensues in advance of a Wrn CONUS trough. Temperature is expected to rise 10 to 20 degrees above average by late week. && .AVIATION /04Z SATURDAY THROUGH WEDNESDAY/... VFR conditions at the start of the TAF period, but deterioration to MVFR is expected at most terminals overnight. With low pressure passing to the south, some light rain is possible, mainly south of I-70. Slow improvement in ceilings will occur from north to south tomorrow afternoon, with VFR achievable at all terminals save for MGW by 00Z. .Outlook... Restrictions are possible into Saturday night with departing low pressure. && .PBZ WATCHES/WARNINGS/ADVISORIES... MD...None. OH...None. PA...None. WV...None. && $$

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