Scientific Forecaster Discussion
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Area forecast discussion...updated
National Weather Service Pittsburgh PA
1053 am EDT Friday Apr 18 2014
increased cloud coverage as a weak cold front passes across the
region today will be followed by mostly sunny conditions and
seasonal temperatures this weekend.
Near term /until 6 PM this evening/...
very little to change with the middle morning update. Cloud cover
will continue to increase in advance of the cold front...but this
front will produce little precipitation across the region with
very meager moisture and upper level support. Maintained the
mention of sprinkles...mainly north...this evening. Otherwise...SW
wind should allow for temperatures to warm to right around
seasonal averages today.
Short term /6 PM this evening through Monday/...
after frontal passage...experimental high pressure to build in through the weekend. Temperatures will be
near seasonal levels until sun...when srly flow and warm advection rtn
temperatures to several degree above average. A weak shortwave will begin to aprch lt Monday
bringing an increases in clouds.
Long term /Monday night through Thursday/...
shower chances have been retained for Tuesday as models continue to indicate
passage of a shortwave trough and associated weak cold front. Amplifying
shortwave ridge...in response to deepening mountain states and plains low...is
then expected to dry the middle week periods...and moderate temperatures until
precipitation chances again increases with approach and passage of the aforementioned
low by weeks end.
Aviation /15z Friday through Tuesday/...
VFR weather is expected to continue through tonight despite passage of a
cold front. With sparse moisture and limited dynamics...the primary frontal
effect will be a wind shift to the northwest by this evening.
Outlook.../Friday night through Tuesday/...
the next chance for restrictions is expected with a Tuesday cold front.