Area Forecast Discussion
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512 FXUS61 KPBZ 250106 AFDPBZ Area Forecast Discussion National Weather Service Pittsburgh PA 906 PM EDT Mon Oct 24 2016 .SYNOPSIS... High pressure will bring dry and cool conditions tonight into Wednesday. Low pressure will bring showers back into the forecast Wednesday night through early Friday. && .NEAR TERM /THROUGH TUESDAY/... Made adjustments to wind and sky elements for the late evening update. Previous discussion follows. Latest satellite observations are in line with model consensus of dissipating stratocu over the southwest zones as the evening progresses. Hence, the aforementioned region is favorable for frost development overnight as the boundary layer decouples and radiational cooling lowers temperatures to the low to mid 30s. Otherwise, cool northwest flow will help continue the stratocu across the northern counties and ridges through Tuesday with a few light showers along the I-80 corridor. Building high pressure will help decrease some cloud coverage later Tuesday. Temperatures will be about 10 degrees cooler than seasonal averages. && .SHORT TERM /TUESDAY NIGHT THROUGH THURSDAY NIGHT/... Conditions are expected to be clear and cold under high pressure Tuesday night. Much of Wednesday will be dry but with increasing clouds as a warm front approaches in advance of deepening Great Lakes low pressure. Shower chances will increase Wednesday night, with likely POPs Thursday as system crosses the Upper Ohio Valley. The mid level system will close off over New England for a time, keeping cold northwest flow across the region into Thursday night with scattered showers. && .LONG TERM /FRIDAY THROUGH MONDAY/... Brief ridging will dry out the region Friday afternoon, but another trough will already be approaching from the west for Saturday. Unsettled weather and cooler than seasonal average temperatures will hold for the weekend into early next week, as a broad trough will remain over the eastern CONUS. In general, followed close to the Superblend guidance for construction of the extended period. && .AVIATION /01Z TUESDAY THROUGH SATURDAY/... Conditions will remain largely VFR overnight with a period of MVFR late tonight/early morning at KFKL and KDUJ as lake-enhanced light showers/ sprinkles will remain a possibility. VFR conditions expected Tuesday as the upper trough shifts to the east. .OUTLOOK /TUESDAY THROUGH FRIDAY/... The next chance for general restrictions will late Wednesday into Thursday as the next disturbance crosses the region. && .PBZ WATCHES/WARNINGS/ADVISORIES... MD...None. OH...Frost Advisory from 3 AM to 9 AM EDT Tuesday FOR OHZ039-048- 049-057>059-068-069. PA...None. WV...Frost Advisory from 3 AM to 9 AM EDT Tuesday FOR WVZ004-012. && $$ is the U.S. government's official web portal to all federal, state and local government web resources and services.