State College, Pennsylvania 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

661
FXUS61 KCTP 072359
AFDCTP

Area Forecast Discussion
National Weather Service State College PA
759 PM EDT Sun Jun 7 2026

.WHAT HAS CHANGED...
* Subtracted a deg or two from maxes M-W, but kept continuity
  for R-F to keep message the same for high heat and humidity.

&&

.KEY MESSAGES...
1) Fog possible in sheltered valleys, mainly north, overnight
as temperatures cool off into the 50s.

2) Low RHs

3) Warmth surges again later this week with dangerous heat
possible Thursday and Friday.

&&

.DISCUSSION...
KEY MESSAGE 1: Fog possible in sheltered valleys, mainly north,
overnight as temperatures cool off into the 50s.

Diurnal cu should dissipate as the sun goes away. Selling tix to
the battle between the dryness of the airmass vs cooling to the
local dewpoints tonight to determine how much fog can form.
Current odds (62.7%) are that fog will form in the deepest
river valleys - mainly of the north - tonight. But, the coverage
will be rather limited. While the airmass is dry, the temps
should be dipping to and perhaps below the crossover temps (mid-
aftn dewpoints) in the lower elevations of the Allegheny
Plateau. Otherwise mainly clear sky and light NE wind, if any,
will make for a window-open night.

--------------------------------------------------------

KEY MESSAGE 2: Low RHs

RH will dip into the upper 20s and 30s Mon, and 30s over the
east on Tues. Paired with relatively light wind and the greened-
up landscape, though, it should yield no elevated risk for
rapid wildfire spread.

--------------------------------------------------------

KEY MESSAGE 3: Warmth surges again later this week with
dangerous heat possible Thursday and Friday.

While the NBM max temps have inched lower by 1-4F for the next
couple of days, the latter half of the week still looks hot.
90s should be widespread Thurs and Fri. The elevations of the
Alleghenies will be the coolest spots, but the valleys there
could also get to 90F. Heat Index/ApparentT values remain
virtually unchanged for those two days.

The new/cooler temps T-W are likely due to the raised cloud
cover and higher chc of precip vs prev guidance. Categorical
(80%+) PoPs appear Tues night over the west as moisture
increases and sct TSRA are expected. These shouldn`t get too far
to the east, perhaps staying W of UNV/AOO. Wed will hold
widespread SHRA/TSRA over the bulk of the CWA as the upper ridge
weakens and shortwaves (old MCSs) crest the ridge and meet up
with the increasing moisture.

Only slight relief arrives Sat, but temps remain very warm/hot.
The 6-10 and 8-14 day outlooks are for continued above normal
temps (and precip). Above normal precip would help out the areas
that continue to be in drought.

&&

.AVIATION /00Z MONDAY THROUGH FRIDAY/...
Winds will continue to die down overnight and take on a more
easterly character as high pressure builds to our east. The
light winds and clearer skies will allow for enough radiational
cooling for patchy fog to develop, most likely in the 08Z-12Z
timeframe. While low lying valleys are the areas with greatest
confidence in fog development, visibility restrictions due to
fog/mist are possible at BFD and UNV. Confidence isn`t high
enough to introduce MVFR, or lower, restrictions into the TAFs,
but should a more aggressive fog up solution be favored during
the overnight model runs, it may have to be added in future
TAFs.

As mentioned in the previous discussion, a backdoor cold front
will move through our easternmost terminals (KIPT/KMDT/KLNS)
Monday morning (09Z-12Z). It brings with it a chance of MVFR
ceilings, but most model solutions look too scattered to
introduce them into the TAFs. Cloud bases during the morning
will be lowest at LNS and MDT in the 3-4kft range. Clouds
continue to scatter during the afternoon and winds will
increasingly turn more southerly as a high cirrus deck moves in
from the west in the late afternoon/evening to the western
terminals.

Outlook...

Mon-Tue...VFR favored outside of isolated morning fog.
Restrictions possible in -SHRA/-TSRA late Tue.

Wed-Fri...Restrictions possible in -SHRA/-TSRA.

&&

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

&&

$$

WHAT HAS CHANGED...Dangelo
KEY MESSAGES...Dangelo/Colbert
DISCUSSION...Dangelo/Colbert
AVIATION...Lambrech