A nice weather pattern which we've been enjoying for much of the week only looks like it'll be
every bit as pleasant today and tomorrow... While temperatures will be 3-5 degrees above the
seasonal averages, there should also be a fair amount of sunshine today... Tomorrow, the sun will
probably begin to mix with some high, thin cirrus clouds -- but these shouldn't tarnish what will be
a decent day along the I-95 corridor... The core of a high pressure system early this morning is
located along the mid-Atlantic coast... The axis of this ridge of high pressure is poised to drift out
into the Atlantic later today, which will bring a light, southerly wind to most places this afternoon...
And, even though there won't be a noticeable uptick in the humidity, most temperatures will wind
up between 77 or 78 in the typically cooler spots and 83 or 84 in some of the warmer cities (for
example, in Philadelphia, Baltimore and Washington D.C.)...
Tonight should be mostly clear, and many places shouldn't be quite as cool as they have been in
recent nights... Tomorrow's 'mixture' of sun and clouds will be accompanied by temperatures in
the upper-70s and lower-80s again... There were some additional adjustments made early
yesterday to the forecasts for Friday night, Saturday and Sunday -- these were based upon the
concept that any kind of model solutions showing a 'cut-off' low pressure circulation developing
tomorrow over the eastern Great Lakes and the Ohio Valley were all being replaced by a fastmoving
front... The European model, for example, had an upper-level low lagging back across
western parts of New York and Pennsylvania on Saturday morning... While other model guidance
was hinting at the possibility that the next front could reach western New England by Saturday
morning (an idea which we're now implementing), we were applying a cautious approach before
speeding up the timing of that front, as well as the weather associated with it...
The consensus amongst the global models is still supporting that more progressive idea -- so we
need to convey the idea that any shower which occurs in the Eastern Region will probably occur
tomorrow night or very early on Saturday morning, if it does at all... For areas near and west of the
Appalachians, there may be a stray shower or thunderstorm occurring near this weak front
tomorrow afternoon... Because of the fast-moving nature of the front, it will not have a sufficient
amount of time to gather much moisture... So, it appears that Saturday will ultimately turn out no
less than partly sunny... And, both days of the weekend will be somewhat cooler, with most
temperatures running in the mid and upper-70s -- this is closer to what is considered typical for
mid-September... So, the "last official weekend of summer" looks as if it will offer some pleasant
weather... Have a good day!!!