Area Forecast Discussion – 02 SEP 2017 – Morning

Area Forecast Discussion

National Weather Service Pittsburgh PA
515 AM EDT Sat Sep 2 2017

.SYNOPSIS...
Temperatures will remain cool with rain likely Saturday. Rain
chances taper down Sunday and dry weather is forecast for Labor
Day.


.NEAR TERM /THROUGH TONIGHT/...
No major changes necessary for the early morning update.

Dry air sampled by the Friday evening sounding is continuing to
erode the leading edge of rain associated with the mid-level
deformation zone lifting north. Behind the line of showers
lifting north, a pocket of drier air will then reside across
northern WV and into southwest PA for much of the morning.

The last vestiges of Harvey, now an upper-level low, will move
over the area later today, bringing rain to most locations. This
system has been slow to advance up the Ohio Valley to this
point, but will begin to open up and shift east faster as it
phases with the broader trough digging into the Great Lakes.
This will ultimately keep rain from lingering too long over the
forecast area, limiting the potential for any hydrologic
concerns. In general, less than an inch of rain is expected with
higher amounts focused south of I-70.

Temperatures won`t move a lot today as increasing cloud cover,
rain, and cooling mid-levels will keep the diurnal trend
suppressed. Highs were lowered further, and should come in well
below average.

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