.AVIATION /06Z FRIDAY THROUGH TUESDAY/...
The primary concern for the next 24 hours continues to be 
visibility restrictions due to wildfire smoke from Canada and 
northeastern Minnesota. Tonight may bring the most widespread 
restrictions as winds lighten behind the front with high 
pressure moving in, with the HRRR/RRFS models showing IFR to 
LIFR visibilities across much of Central PA. Improvements from 
overnight IFR-LIFR on Friday is favored across the northeastern 
edge of the smoke plume (currently forecast to be KBFD/KIPT), 
where the wind's northerly component may linger enough to bring 
smoke south of those sites, with improvements looking less 
likely over southwestern Pennsylvania (KJST/KAOO) where the 
winds may lighten as the core of the smoke plume moves overhead.

As of right now highest confidence remains in smoke hanging on
until after 06Z on July 18th. A frontal system will approach us
very late Friday night into Saturday morning and usher the
smoke out, only to replace it with showers and thunderstorms
through the day on Saturday. 

Outlook...

Sat-Sun...Chance of showers and t-storms, mainly during
the afternoon hours on Saturday into early Sunday aft. Smoke
moving out.

Mon...Mainly VFR.

Tue...Restrictions possible in showers/t-storms.

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