With a southerly flow of air turned off this weekend, heat will stay away from Philadelphia, but part of the weekend is likely to be unsettled.
Temperatures will average near to slightly below normal this weekend. Temperatures typically range from a low in the middle 60s to a high in the middle 80s F around the Philadelphia metro area.
A storm system from the Central states will cause rain to bulge northward for a time and brush the region Saturday into Saturday night.
How much rain falls on Saturday and how quickly the weather clears on Sunday will depend on the strength of that storm system.
According to Northeastern Weather Expert Dave Dombek, "A stronger, rather than weaker storm would allow more rain to fall farther north on Saturday but would also allow more drying and hence clearing farther south on Sunday."
Low clouds and drizzle could linger in part of the area on Sunday, especially south and east of the city.
"The daylight hours are long and the sun is strong this time of the year, so odds are in favor of clearing progressing across the region on Sunday," Dombek said.
Several storms will bring periods of rain and gusty winds to the west coast of the United States next week with the potential for one of these to reach Southern California.
Colder weather, and in some cases, a taste of winter with snow will continue to invade the northeastern United States this weekend.
Dry weather set to dominate the southern United States into November will only worsen the already extreme drought conditions.
The changing of the seasons will bring beneficial rainfall to northern Brazil, a region that has experienced severe drought over the past several years.
Rain will continue to cause travel delays and raise the risk of isolated flooding in parts of the northeastern United States and Atlantic Canada into Saturday evening.
Damaging storms pounded the Pacific Northwest, while two powerful typhoons struck the Philippines within a four-day span.
Temperature reached 104 degrees at San Diego (record for date). Record for date 100 degrees at Los Angeles (downtown). Climax of heat wave of record duration in Southern California.
Ottawa, Canada (1988)
Record October snowstorm brings 21 cm (just over 8 inches).
Hurricane Juan kills more than 200 and results in $1.5 billion in damages.