900
FXUS61 KCTP 092101
AFDCTP

Area Forecast Discussion
National Weather Service State College PA
501 PM EDT Sun Jun 9 2024

.SYNOPSIS...
*We will see spotty showers or thundershowers across the
 northern and western highlands this evening ahead of a
 reinforcing shot of cooler air
*This reinforcing shot of cooler air will keep highs 5 to 15F
 below average on Monday.
*Temperatures will be on the rise through the end of the week as
 high pressure brings a stretch of rain-free weather with low
 humidity, light winds, and plenty of sunshine.

&&

.NEAR TERM /UNTIL 11 PM THIS EVENING/...
An approaching vort max is beginning to generate spotty showers
across the northern and western PA as the evening begins, and
this activity should continue to push southeastward in the
5-11PM timeframe before dissipating overnight.

&&

.SHORT TERM /11 PM THIS EVENING THROUGH WEDNESDAY NIGHT/...
A reinforcing shot of cold air will be ushered in overnight
behind a secondary cold front, allowing temperatures to drop
into the upper 40s in the northern tier and the upper 50s in
the southeast. On Monday, the approach of a potent shortwave
aloft will support more clouds than sun and isolated showers or
sprinkles across the northern tier. Monday will be the coldest
day of the week as temperatures struggle to make it out of the
50s in the northern tier. High temperatures will be -5F to -15F
compared to average for this time of year.

Another chilly night is in store for Monday night with lows
ranging from the mid 40s at higher elevations in the Laurel
Highlands and northwest mountains to mid 50s in the Lower
Susquehanna Valley.

Upper level troughiness over the northeastern United States
will keep temperatures below normal through Wednesday. Tuesday
and Wednesday do look dry as a lack of moisture will make it
difficult for showers to form, despite the upper level low
overhead.

&&

.LONG TERM /THURSDAY THROUGH SUNDAY/...
Around this date last year wet went from being very dry to
wet. The last few months have been quite wet across much of
central PA. Now it looks we will go from wet to dry, again
just about one year to date.

After a few chilly days, mainly Monday, rather warm temperatures
are expected on Thursday into Friday. However, dewpoints not
fcst very much above 60 degrees, so humidity levels will not
change the apparent temperature much.

Next chance of showers and storms will be Friday, as a cold
front drops southeast. Not outlook for anything at this point,
height falls not all that much, and moisture limited.

High pressure builds in behind the front for a dry weekend.
Temperatures will be cooler again, but more typical for this
time of year.

&&

.AVIATION /21Z SUNDAY THROUGH FRIDAY/...
All TAF sites are VFR as of 18z Sun. Expect continued fair
weather cu with bases near 5000 ft and wind gusts up to 25 kts
from 290-310 deg this afternoon. An approaching vort max this
evening will bring a chance for showers and thundershowers
across the northern tier of PA mainly from 22z Sun to 03z Mon,
potentially impacting BFD.

A secondary sfc cold front will bring a reinforcing shot of
cooler air and considerable cloudiness late tonight into
Monday. There is a high chance (~90%) that ceilings over the
western highlands (BFD, JST) will degrade to at least MVFR by
daybreak Monday, with a ~40-50% chance of IFR ceilings.
Restrictions will likely last through much of the day Monday.
Farther to the south and east, the central mtns (AOO, UNV, IPT)
could see a period of MVFR cigs, while the Lower Susq Valley
(MDT, LNS) should remain predominantly VFR through the TAF
period.

Outlook...

Mon...Spotty showers and MVFR cigs likely, mainly north.

Tue-Thu...Predominantly VFR w/ no sig wx expected.

Fri...Restrictions poss with if afternoon/evening convection
develops.

&&

.CTP WATCHES/WARNINGS/ADVISORIES...
None.

&&

$$

SYNOPSIS...Evanego/Colbert
NEAR TERM...Evanego/Colbert
SHORT TERM...Banghoff/Colbert
LONG TERM...Martin
AVIATION...Guseman/Evanego