Area Forecast Discussion
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041 FXUS61 KPBZ 180416 AFDPBZ Area Forecast Discussion National Weather Service Pittsburgh PA 1216 AM EDT Wed Apr 18 2018 .SYNOPSIS... Precipitation chances return today and Thursday with crossing low pressure. && .NEAR TERM /THROUGH TODAY/... No changes were needed for the midnight update as cloud diminishment from the southwest is underway via building high pressure. Areas N of I 80 should be the last to see this occur as WNW flow maintains a stratocu layer. Lows tonight are expected to be 10 to 15 degrees below average. Ridging/return to southwesterly sfc flow ahead of approaching low pressure and increased insolation will support warmer temperature today, albeit still 5 to 10 degrees under the averages. && .SHORT TERM /TONIGHT THROUGH FRIDAY/... Showers are likely to will spread across the Upper Ohio Region this evening as the aforementioned low approaches. Cold advection will ensue as the system passes with rain showers changing to snow early on Thursday. These are likely to continue and mix with/change to rain as the boundary layer warms through the day. No significant accumulation is expected given that warmth and sun angle. && .LONG TERM /FRIDAY NIGHT THROUGH TUESDAY/... Ridging is forecast to support dry conditions and a warming trend through early next week. && .AVIATION /04Z WEDNESDAY THROUGH SUNDAY/... VFR will be marred only by lingering MVFR stratocu at FKL and DUJ this morning as sfc high pressure slides across WV and backs wind to the SW. Conditions will redeteriorate by this evening as advancing low pressure spreads rain over the region. Expect general MVFR with lcl IFR. OUTLOOK... Restrictions will linger through Thursday as sct to nmrs snow and rain showers continue in the cold flow behind the low. && .PBZ WATCHES/WARNINGS/ADVISORIES... MD...None. OH...None. PA...None. WV...None. && $$

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