Area Forecast Discussion
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000 FXUS61 KPBZ 231749 AFDPBZ Area Forecast Discussion National Weather Service Pittsburgh PA 1249 PM EST Tue Jan 23 2018 .SYNOPSIS... Temperature will fall and rain showers will change to snow by tonight as more seasonal weather follows this mornings cold front. && .NEAR TERM /THROUGH TONIGHT/... Scattered showers this afternoon as a shortwave passes over the region. Cooling aloft will result in rain changing over snow during the afternoon but accumulation potential is minimal..limited to an inch or so for areas north of I 80 and along the ridges. Winds will remain gusty with a tight pressure gradient and forecast soundings indicating that winds should remain coupled overnight. && .SHORT TERM /WEDNESDAY THROUGH FRIDAY/... Cold northwesterly flow is expected to maintain snow chances in lee of the Lakes and in the higher terrain through Wednesday, but conditions thereafter will be of improvement as building high pressure drys and warms the weather in advance of another Wrn CONUS trough. && .LONG TERM /FRIDAY NIGHT THROUGH MONDAY/... The advance and passage of the aforementioned trough is timed to degrade conditions via rain for the weekend, and cool temperature back toward the average for the start of the new week. && .AVIATION /18Z TUESDAY THROUGH SUNDAY/... VFR conditions will slowly deteriorate to MVFR, mainly due to stratocu cigs with a crossing trough and cold advection. Scattered rain or snow showers are also expected with the trough, becoming more numerous N of I 80. A changeover to snow is anticipated, with brief visibility restrictions possible, but the current TAF issuance will not include these due to the scattered nature of snow showers overnight. A tightening pressure gradient and mixing should result in gusty SW winds veering to westerly through tomorrow morning. .OUTLOOK... Restrictions are possible until high pressure builds Wed night. Restriction potential returns with a Sat cold front. && .PBZ WATCHES/WARNINGS/ADVISORIES... MD...None. OH...None. PA...None. WV...None. && $$

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