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

Dangerously hot and humid conditions are expected through Wednesday. There is also a threat of isolated severe thunderstorms on Wednesday. Flash flooding from locally heavy rainfall is possible on Thursday. See this briefing for details on these hazards. Read More >

Hazardous Weather Conditions

Current conditions at

Philadelphia, Philadelphia International Airport (KPHL)

Lat: 39.87°NLon: 75.23°WElev: 7ft.

Partly Cloudy

95°F

35°C

Humidity	46%
Wind Speed	SW 12 mph
Barometer	29.98 in (1015.3 mb)
Dewpoint	71°F (22°C)
Visibility	10.00 mi
Heat Index	103°F (39°C)
Last update	30 Jul 1:54 pm EDT

More Information:

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

Extended Forecast for

Colwyn PA

Flood Watch July 31, 02:00pm until August 1, 06:00am

Heat Advisory July 30, 02:17pm until July 30, 08:00pm

Click here for hazard details and duration

Flood Watch

Heat Advisory

Heat Advisory July 30, 02:17pm until July 30, 08:00pm
NOW until 8:00pm Wed
Heat Advisory
This Afternoon
High: 98 °F
Hot
Tonight
Low: 77 °F
Mostly Clear
Thursday
High: 90 °F
Chance
Showers then
Heavy Rain
Thursday Night
Low: 68 °F
Heavy Rain
Friday
High: 73 °F
Showers
Friday Night
Low: 62 °F
Chance
Showers
Saturday
High: 80 °F
Sunny
Saturday Night
Low: 61 °F
Mostly Clear

Detailed Forecast

This Afternoon

Sunny and hot, with a high near 98. Heat index values as high as 103. Southwest wind around 5 mph.

Tonight

Mostly clear, with a low around 77. Southwest wind around 5 mph.

Thursday

A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2pm. Some of the storms could produce heavy rainfall. Increasing clouds, with a high near 90. Southeast wind 5 to 10 mph becoming east in the morning. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

Thursday Night

Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Low around 68. Northeast wind 5 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.

Friday

Showers and possibly a thunderstorm. High near 73. Northeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

Friday Night

A chance of showers before 2am. Mostly cloudy, with a low around 62. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

Saturday

Sunny, with a high near 80.

Saturday Night

Mostly clear, with a low around 61.

Sunday

Sunny, with a high near 83.

Sunday Night

Partly cloudy, with a low around 63.

Monday

Mostly sunny, with a high near 86.

Monday Night

Partly cloudy, with a low around 64.