Up To 5 Inches Of Rain Possible In Eastern PA Monday, Flash Flood Watch Issued

A flood watch has been issued for the greater Philadelphia area on Monday, as up to two inches of rain could fall throughout the evening as part of the latest severe weather front, according to forecasters.

Storms will arrive this afternoon and continue into the evening, will the brunt of the impacts occurring between 2 p.m. Monday and 2 a.m. Tuesday.

"Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations," the National Weather Service said. "Creeks and streams may rise out of their banks. Flooding may occur in poor drainage and urban areas."

Localized rainfall amounts of up to three to five inches of rain could occur, forecasters said.

The National Weather Service put all of southeastern Pennsylvania and parts of western New Jersey in their "moderate risk" category, which is the second most severe categorization they have for rainfall events.

Monday's heavy rainfall is only the first wave of a week full of showers and thunderstorms, with inclement weather in the forecast for every day this week.

Tuesday, particularly, could bring back heavy rainfall at the rate of two inches per hour, and there's another chance of flash flooding, according to weather officials. However, the chance of flooding on Tuesday is not as severe or widespread as the chance during Monday's storm.

"There will be chances of showers and thunderstorms each day this week," the National Weather Service added. "Remain alert for changing weather conditions, and have a reliable, trustworthy source to receive warnings should they be issued."

Here's the full forecast, according to the National Weather Service:

Monday
Showers and thunderstorms likely, mainly after 3 p.m. Mostly cloudy, with a high near 88. South wind 5 to 10 mph. Chance of precipitation is 60 percent. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Tonight
Showers and thunderstorms, mainly before 4 a.m., then showers likely and possibly a thunderstorm after 5 a.m. Patchy fog between 4 a.m. and 5 a.m. Low around 74. Southeast wind around 5 mph. Chance of precipitation is 80 percent. New rainfall amounts between a quarter and half of an inch possible.

Tuesday
Showers likely and possibly a thunderstorm before 8 a.m., then a chance of showers and thunderstorms between 8 a.m. and 2 p.m., then showers likely and possibly a thunderstorm after 2 p.m. Some of the storms could produce heavy rainfall. Mostly cloudy, with a high near 87. West wind around 5 mph becoming southeast in the afternoon. Chance of precipitation is 70 percent. New rainfall amounts between a half and three quarters of an inch possible.

Tuesday Night
Showers likely and possibly a thunderstorm before 8 p.m., then a chance of showers and thunderstorms between 8pm and 11pm, then a chance of showers after 11 p.m. Some of the storms could produce heavy rainfall. Mostly cloudy, with a low around 74. South wind around 5 mph becoming calm. Chance of precipitation is 60 percent. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Wednesday
A chance of showers, then showers likely and possibly a thunderstorm after 2 p.m.. Mostly cloudy, with a high near 89. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 70 percent. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Wednesday Night
Showers likely and possibly a thunderstorm before 8 p.m., then a chance of showers and thunderstorms after 8pm. Mostly cloudy, with a low around 75. Chance of precipitation is 60 percent. New rainfall amounts between a quarter and half of an inch possible.

Thursday
A chance of showers, then showers likely and possibly a thunderstorm after 2 p.m. Partly sunny, with a high near 91. Chance of precipitation is 60 percent.

Thursday Night
Showers likely and possibly a thunderstorm before 8pm. Partly cloudy, with a low around 77. Chance of precipitation is 60 percent.

Friday
A chance of showers and thunderstorms after 2 p.m. Mostly sunny, with a high near 92. Chance of precipitation is 50 percent.

Friday Night
A chance of showers and thunderstorms before 2 am. Mostly cloudy, with a low around 74. Chance of precipitation is 30 percent.