A round of showers will swing through the Philadelphia area Thursday into Friday morning.
A weak storm riding along a front will slide through the area, producing the sporadic rainfall.
Despite the seemingly wet offing, the vast majority of the time will be free of rain through Friday. Total rainfall Thursday through Friday morning is likely to be less than one-quarter of an inch.
When the rain falls, most of it will not be heavy. However, with any downpour in urban areas, there is a risk of brief poor-drainage area flooding and travel delays.
In between the showers, the sun can peek out.
Temperatures will average 5 to 10 degrees above normal most days into the weekend. During the middle of October, daytime highs average in the middle 60s with nighttime lows in the middle to upper 40s.
Waves of progressively colder weather may begin to affect the area next week.
While Hurricane Cristobal will track east of the United States this week, it will spread rough surf along much of the Atlantic coast and will have some direct impact on Bermuda.
After a brief cooldown late this week, very warm and humid air will bounce back during the Labor Day weekend.
While the weather over much of the Atlantic and Pacific coasts will be free of rain this Labor Day weekend, a zone of unsettled weather will reach across part of the Central states.
Though Hurricane Marie will weaken through this week, it will bring dangerous waves and rip currents to Southern California.
After several days of summerlike warmth and humidity, cooler and more pleasant air will return to end the week.
A disturbance gathering spin over Gulf of Mexico will drift onshore in Texas before the end of the week with drenching showers and locally gusty thunderstorms.
Miami, FL (1964)
Hurricane Cleo battered South Florida area, the first direct hit since 1950. Gusts to 135 mph, barometer 28.57 inches. Damage at $125 million.
East Coast (1971)
Tropical Storm Doria paralleled East Coast, causing serious flooding. It also spawned a tornado in Cape May County, NJ.
Cedoux, Saskatchewan (1973)
Largest hailstone ever recorded in Canada. This stone was 4.5 inches in diameter and weighed a pound.