


Area Forecast Discussion
Issued by NWS State College, PA
Issued by NWS State College, PA
Versions:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
-- Remove Highlighting --
-- Discussion containing changed information from previous version are highlighted. --793 FXUS61 KCTP 291125 AFDCTP Area Forecast Discussion National Weather Service State College PA 725 AM EDT Sun Jun 29 2025 .SYNOPSIS...-- Changed Discussion --* Widespread fog over much of central PA this morning will give way to sunshine for the rest of the day. * Today will be the best day of the final weekend of June with lower humidity and mostly rain-free/dry conditions (slim shower/storm chances in southern PA). * Stormy pattern resumes early week with renewed risk of strong to severe storms and locally heavy rainfall.-- End Changed Discussion --&& .NEAR TERM /UNTIL 6 PM THIS EVENING/...-- Changed Discussion --Areas of fog remain in place across a good chunk of central PA this morning, but haven`t seen widespread visibility restrictions to 1/4 mile or less locally. Drier air working into the northern tier, evidenced by dewpoints in the mid-upper 50s, and more concentrated cloud cover farther south may have been the limiting factors for more widespread dense fog. Surface high pressure building into central PA will provide a mostly dry second half of the weekend. Still a slim chance of a shower/storm in southern PA as the core of the high pressure system will be positioned farther north with lingering moisture along the Maryland border. Shortwave energy traversing PA would be the forcing mechanism for any storms later today along the Mason-Dixon line, although updraft/downdraft organization is expected to be poor given deep layer shear on the order of 20 knots. Increasing sunshine through the day should help temperatures warm into the low-mid 80s north and mid-upper 80s in south central PA this afternoon.-- End Changed Discussion --&& .SHORT TERM /6 PM THIS EVENING THROUGH MONDAY NIGHT/... The widespread stormy and unsettled pattern resumes Monday with a shortwave trough and subsequent falling heights progressing through the Great Lakes, putting the Commonwealth back in the warm sector as deeper moisture is pulled north. Partly cloudy skies to begin the day on Monday will allow for plenty of destabilization. This combined with the above mentioned moisture return and increasing deep layer shear of around 25-30 knots will provide the ingredients for another round of strong storms Monday afternoon/evening. Strong outflow winds and heavy rainfall look to be the primary threats. && .LONG TERM /TUESDAY THROUGH SATURDAY/... Upper-level ridging early in the week will be replaced by upper-level troughiness across the northeastern United States for the second half of the week. By next weekend, the upper level pattern will become more zonal. As for sensible weather...a cold front will cross the area on Tuesday, accompanied by a good chc of SHRA/TSRA. Behind this front, a (slightly) cooler and drier airmass will return for the remainder of the work week. There could be a few aftn SHRA/TSRA on Thursday in response to a weak shortwave trough. Otherwise, much of the second half of the week (Wed-Fri) should be rain-free. As sfc high pressure slides off the East Coast and winds become southerly, warmer temperatures and increasing humidity will return for next weekend. && .AVIATION /11Z SUNDAY THROUGH THURSDAY/... Got to see the sun come up, one of the few mornings where clouds and showers have been more limited. Still there is isolated returns on the radar the last few hours. Some fog at times since Midnight, but more limited than in the last few mornings. Overall expect most of the day to be dry with VFR conditions. More fog expected later tonight. Later Monday into Tuesday, more showers and storms. Outlook... Mon-Tue...SHRA/TSRA expected, with periods of fog and low clouds overnight. Wed...AM fog, then VFR. Thu...Primarily VFR, although a few aftn SHRA/TSRA are possible. && .CTP WATCHES/WARNINGS/ADVISORIES... None. && $$ SYNOPSIS...Guseman/Bowen NEAR TERM...Guseman/Bowen SHORT TERM...Guseman/Bowen LONG TERM...Steinbugl/Evanego AVIATION...Martin