Briefing for Flash Flood, Severe Thunderstorm, and Heat Risks through Thursday

Scattered showers and thunderstorms with locally heavy rainfall may lead to areas of flash flooding through tonight. There is potential for isolated severe thunderstorms with damaging wind gusts tonight and Thursday. Hot and very humid conditions are expected Thursday. See this briefing for details on these threats. Read More >

Hazardous Weather Conditions

Current conditions at

Philadelphia, Philadelphia International Airport (KPHL)

Lat: 39.87°NLon: 75.23°WElev: 7ft.

Overcast

88°F

31°C

Humidity	66%
Wind Speed	SW 12 mph
Barometer	29.95 in (1014.0 mb)
Dewpoint	75°F (24°C)
Visibility	10.00 mi
Heat Index	98°F (37°C)
Last update	16 Jul 6:54 pm EDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

2 Miles NW Williamstown NJ

Flood Watch until July 17, 03:00am

Heat Advisory July 17, 10:00am until July 17, 08:00pm

Click here for hazard details and duration

Flood Watch

Heat Advisory

Flood Watch until July 17, 03:00am
NOW until 3:00am Thu
Flood Watch
Tonight
Low: 74 °F
Chance
T-storms
Thursday
High: 92 °F
Chance
T-storms
Thursday Night
Low: 74 °F
Chance
T-storms then
Partly Cloudy
Friday
High: 88 °F
Mostly Sunny
Friday Night
Low: 68 °F
Partly Cloudy
Saturday
High: 87 °F
Partly Sunny
then Chance
Showers
Saturday Night
Low: 71 °F
Showers
Likely
Sunday
High: 86 °F
Chance
Showers then
Chance
T-storms

Detailed Forecast

Tonight

A chance of showers and thunderstorms, mainly after 10pm. Mostly cloudy, with a low around 74. Southwest wind around 5 mph. Chance of precipitation is 50%. New rainfall amounts between a quarter and half of an inch possible.

Thursday

A chance of showers and thunderstorms, mainly before 3pm. Mostly cloudy through mid morning, then becoming sunny, with a high near 92. Heat index values as high as 101. Southwest wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Thursday Night

A chance of showers and thunderstorms, mainly between 7pm and 8pm. Partly cloudy, with a low around 74. Southwest wind around 5 mph. Chance of precipitation is 30%.

Friday

Mostly sunny, with a high near 88. Northwest wind around 5 mph.

Friday Night

Partly cloudy, with a low around 68. Northwest wind around 5 mph becoming calm.

Saturday

A chance of showers after 2pm. Mostly sunny, with a high near 87. Chance of precipitation is 30%.

Saturday Night

A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 8pm. Mostly cloudy, with a low around 71. Chance of precipitation is 60%.

Sunday

A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 86. Chance of precipitation is 50%.

Sunday Night

A chance of thunderstorms before 8pm. Mostly cloudy, with a low around 68. Chance of precipitation is 30%.

Monday

Mostly sunny, with a high near 85.

Monday Night

Partly cloudy, with a low around 66.

Tuesday

Mostly sunny, with a high near 85.

Tuesday Night

Partly cloudy, with a low around 67.