Area Forecast Discussion
Issued by NWS

Current Version | Previous Version | Graphics & Text | Print | Product List | Glossary Off
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
-- Highlight Changed Discussion --
-- Discussion containing changed information from previous version are highlighted. --
875 FXUS61 KPBZ 211900 AFDPBZ Area Forecast Discussion National Weather Service Pittsburgh PA 300 PM EDT Fri Oct 21 2016 .SYNOPSIS... Cool and unsettled weather is expected through Saturday with a crossing upper level weather disturbance. Dry weather should return Sunday under high pressure. && .NEAR TERM /UNTIL 6 AM SATURDAY MORNING/... Periods of rain should continues tonight on the western side of departing surface low pressure, and as an upper trough slowly advances across the Upper Ohio Valley region. The rain should taper off to scattered showers later tonight as the main upper trough axis shifts east of the area. Enough cold advection is progged to include a few snow showers mixing in at times in the higher terrain and for areas north of I 80. An increasing pressure gradient should also result in gusty winds especially in the higher terrain, where gusts around 40 mph are expected. Lows temperatures should be near the seasonal averages. && .SHORT TERM /6 AM SATURDAY MORNING THROUGH MONDAY/... Cold advection in northwest flow, limited lake enhancement, and proximity to the upper low/trough should continue a scattered shower potential across the area Saturday, with some snow possibly mixing in across the higher terrain. The tight pressure gradient should also result in gusty winds of 30-35 mph, with gusts near 45 mph in the higher terrain across WV/MD. Building high pressure late Saturday and Sunday should return dry weather to the region before a fast moving cold front approaches and passes through the area Sunday night. Weak upper troughing and cool northwest flow should keep some clouds across the region Monday, with low chance pops for showers north of I 80. Other thant a brief warm up Sunday, temperatures should average below seasonal levels. && .LONG TERM /MONDAY NIGHT THROUGH FRIDAY/... Ridging should maintain dry weather across the region through mid week. A Midwestern trough should approach and cross the area by late week, with shower chances returning. Temperatures should average near to a few degrees below seasonal levels through the period. && .AVIATION /19Z FRIDAY THROUGH WEDNESDAY/... IFR and low end MVFR with patchy rain can be expected into the evening as a deep trough swings across the region. Some slow improvement in flight conditions will begin by evening, although only ZZV is expected to achieve VFR by the end of the TAF period. Expect north, to northwest wind with gusts of 20 to 25 kt until night falls. As cold northwest flow intensifies on Saturday, MVFR ceiling will be reinforced with scattered showers. Expect wind gusts of 25 to 30 kts as the mixing deepens via cold advection at the top of the layer. .OUTLOOK /SATURDAY NIGHT THROUGH WEDNESDAY/... Periodic restrictions can be expected until high pressure grips the region in the wake of a late Sunday/early Monday shortwave and associated weak front. && .PBZ WATCHES/WARNINGS/ADVISORIES... MD...None. OH...None. PA...None. WV...None. && $$ 07/15 is the U.S. government's official web portal to all federal, state and local government web resources and services.