Scientific Forecaster Discussion
Area forecast discussion
National Weather Service Pittsburgh PA
642 am EDT Tuesday Sep 23 2014
dry weather can be expected for the remainder of the week while
temperatures will moderate by Wednesday.
Near term /through tonight/...
No updates needed early this morning as the current forecast looks
to be in line with latest observational trends. Previous discussion below..
high pressure over the eastern Great Lakes...skies should be
mostly sunny/clear through the next 24 hours. With flow over the
Great Lakes having diminished and stratocumulus dissipated
overnight...both daytime and nighttime temperatures will edge
towards normal values...but will remain about 5 degrees below
Short term /Wednesday through Thursday night/...
high pressure will edge farther into the northeast...but ridging
extending back into the Ohio Valley should be able to deflect a
low pressure system moving up the East Coast from making too much
inland progress. Have slightly upped cloud cover across eastern
counties...but still think that the bulk of clouds and all
precipitation will remain to the east of the region. Temperatures
will rise to above normal values through much of the area...but
will be slightly cooler across the eastern counties where some
cloud cover is present.
Long term /Friday through Monday/...
temperatures will hover between 5 to 10 degrees above normal into
early next week as a large ridge of high pressure transitions across
the region. Have introduced mention of precipitation as models
show good continuity with previous runs in showing an area of low
press re impacting the region late this weekend.
Aviation /12z Tuesday through Saturday/...
dry conditions and light winds expected today with patchy spots of
MVFR to IFR visibility restrictions that have developed overnight
improving by middle morning as winds aloft begin to mix down to the
Outlook.../tonight night through Saturday/...
building high pressure will result in VFR conditions the remainder
of the week and into the weekend.
Maryland...frost advisory until 9 am EDT this morning for mdz001.
PA...frost advisory until 9 am EDT this morning for paz074-076.
WV...frost advisory until 9 am EDT this morning for wvz023-041.