The Delaware Valley will be near the triple point of the cold front, warm front, and occluded front on Thursday. The SPC has placed portions of the region under a moderate risk for severe weather (as of this writing, south of the Lancaster-Doylestown-Toms River line). While tornadoes are possible, they aren't likely. The biggest threat will be severe thunderstorms with strong, damaging wind gusts and torrential rain, which could lead to more flooding. In fact, most of the region is under a Flood Watch through late Thursday night. There will be a few showers around during the morning, but rain will increase in coverage and intensity throughout the day, putting a damper on the first day of the U.S. Open. Temperatures are tricky to forecast for tomorrow -- it really depends where the system sets up. We'll go with 80 degrees for the city for now, but if we get in the warm sector it could be as warm as the mid 80s. Southeast winds will shift from the west at 10 to 20 mph.
Friday will be much calmer with a mix of sun and clouds and just a slight chance for a leftover shower. High pressure will set up for the weekend, and we'll be mostly sunny on Saturday but there may be a few more clouds around on Father's Day.
A low pressure system over the Great Lakes will bring us shower and thunderstorm chances for Monday and Tuesday, but we dry out by Wednesday.
7 AM 70 degrees, Few Showers
Noon 75 degrees, Rain & Thunder
5 PM high 80 degrees, Heavy Rain & Thunder
Sunrise 5:32 AM
Sunset 8:30 PM