OVERNIGHT: Mostly Cloudy, A Few Showers. Lo 63. Winds: SE 5-10 mph.
THURSDAY: Scattered PM T-Storms, Some Severe. Hi 78. Winds: S 5-10 mph.
FRIDAY: A Few PM T-storms. Hi 82. Winds: W 5-10 mph.
As of 11:30p, a cluster of heavier showers was located west of Harrisburg and will continue to drift north through parts of Mifflin, Juniata, Perry, Cumberland, and Franklin counties. Elsewhere, just a few showers are expected overnight as a warm front moves through. It will be mild to start tomorrow with lows in the 60s.
After a break late Thursday morning, the afternoon will provide a better chance for thunderstorms as another front moves through the area. The main time-frame to watch is between 1-7p. During this time, a cluster of storms will move west to east, posing mainly a damaging wind threat. There may be enough shear in the low-levels of the atmosphere to support an isolated tornado threat, but the lack of single-cell storms should keep the threat quite low. By sunset, storms should be mainly south and east of the viewing area, with just a stray shower or storm possible into Thursday night.
Other than a couple storms Friday afternoon, the upcoming weekend features building heat and lots of sunshine. Highs reach 90° on Sunday and we expect more days in the 90s next week to bring our first heat wave of the year. In addition to the building heat, a stretch of dry conditions is also expected once again, with no further storm chances through at least the middle of next week.
-Meteorologist Adis Juklo