textproduct: State College
This forecast discussion was created in the public domain by the National Weather Service. It can be found in its original form here.
WHAT HAS CHANGED
No significant changes.
KEY MESSAGES
1) Periods of rain and breezy conditions from Isaias arrive Saturday night and continue through Sunday
DISCUSSION
KEY MESSAGE 1: Periods of rain and breezy conditions from Isaias arrive Saturday night and continue through Sunday
Departing high pressure will maintain dry weather tonight and Saturday with increasing mid and high clouds. While clouds could modulate min temps to some extent, expect another chilly night across the northern tier with patchy frost possible.
Rain associated with Isaias is projected to reach the Laurel Highlands after midnight early Sunday morning and gradually expand throughout central PA Sunday morning. Periods of rain continue Sunday afternoon into Sunday night before tapering off by early Monday. Total rainfall amounts are still forecast between 0.50 and 1.50 inches over a 24-36hr duration with a low risk of potential flooding impacts. As post-tropical/TD Isaias tracks from the TN Valley into WV, it's wind field will bring breezy conditions with max wind gusts 35-40 mph fcst over the ridgetops in the Laurel Highlands on Sunday.
AVIATION /18Z FRIDAY THROUGH WEDNESDAY/
VFR conditions are expected overnight under mainly clear skies with light winds. Patchy valley fog may form, but the very dry air mass should limit the overall extent of fog. Impacts at TAF sites appear very unlikely, with the HREF showing a less than 10 percent chance of visibility dropping below 6SM across all of Central PA. VFR conditions continue through the day on Friday as high pressure remains in control. Winds will be out of the west-northwest at 5 to 10 knots. The next chance for restrictions will likely not be until Sunday when the remnants of Hurricane Isaias bring moisture and rain over the region.
Outlook...
Sat...VFR conditions expected.
Sun-Mon...Restrictions likely in lower ceilings and rain.
Tue...VFR favored, though a FROPA may bring restrictions in -SHRA. AM fog possible.
CTP WATCHES/WARNINGS/ADVISORIES
None.
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