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Area forecast discussion 
National Weather Service Pittsburgh PA
244 PM EDT Mon Oct 24 2016

high pressure will bring dry and cool conditions later tonight into
Wednesday. Low pressure will brings showers back into the forecast
later Wednesday night into Friday.


Near term /through Tuesday/...
frost advisory issued for overnight for parts of eastern Ohio
into southern counties of the northern West Virginia Panhandle,
where the best opportunity for stratocu to break out later
tonight with light winds will reside. This would give enough
radiational cooling for areas of frost. Otherwise cool northwest
flow will keep stratocu across much of the region into midday
Tuesday, with a few light showers along the I-80 corridor. High
pressure will gradually bring subsidence and decreasing clouds
Tuesday afternoon. Temperatures will be about 10 degrees below the
seasonal averages.


Short term /Tuesday night through Thursday night/...
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. 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
mean trough will remain over the eastern Continental U.S.. in general,
followed close to the superblend guidance for construction of the
extended period.


Aviation /19z Monday through Saturday/...
VFR with occasionally MVFR stratocu in cold advection will
continue through at least the first half of the taf period. Lake-
enhanced showers will be situated in the vicinity of kfkl and kduj
through the remainder of the afternoon but should do little to
impact visibility.

Clouds should begin to scatter out from west to east as a surface
ridge builds overhead and we lose the instability of daytime
heating tonight. However, as the upper trough shifts to the east,
some of the model guidance swings a weak shortwave across the
lakes which may maintain clouds and chances for precip, again
mainly north of pit. Regardless, VFR conditions should prevail for
much of Tuesday.

West-northwest wind with gusts to 20kts will diminish tonight.

Outlook /Tuesday through Friday/...
the next chance for general restrictions will be with Thursday
low pressure.


Pbz watches/warnings/advisories...
Ohio...frost advisory from 3 am to 9 am EDT Tuesday for ohz039-048-
WV...frost advisory from 3 am to 9 am EDT Tuesday for wvz004-012.



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