Thunderstorms and Heavy Rains Across Portions of the Central and Eastern US; Heat Expands to Portions of the East

Widespread showers and thunderstorms, some severe, may produce heavy downpours and flash flooding across much of the eastern and central U.S. Dangerous heat will continue in the Pacific Northwest and expand across portions of the East. Deep tropical moisture and associated thunderstorms will bring heavy rainfall and localized flash flooding across portions of Florida into the central Gulf Coast. Read More >

Hazardous Weather Conditions

Heat Advisory in effect from July 17, 10:00 AM EDT until July 17, 08:00 PM EDT

Current conditions at

Philadelphia - Wings Field Airport (KLOM)

Lat: 40.14°NLon: 75.27°WElev: 282ft.

Fog/Mist

73°F

23°C

Humidity	NA
Wind Speed	Calm
Barometer	30.07 in
Dewpoint	N/A
Visibility	1.50 mi
Last update	16 Jul 3:15 am EDT

More Information:

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

Extended Forecast for

Gwynedd PA

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

Click here for hazard details and duration

Heat Advisory

Overnight
Low: 73 °F
Mostly Cloudy
Wednesday
High: 90 °F
Partly Sunny
then Heavy
Rain
Wednesday Night
Low: 73 °F
Heavy Rain
Thursday
High: 92 °F
Showers
Likely
Thursday Night
Low: 75 °F
Showers
Likely then
Partly Cloudy
Friday
High: 87 °F
Mostly Sunny
then Chance
T-storms
Friday Night
Low: 66 °F
Chance
T-storms then
Partly Cloudy
Saturday
High: 85 °F
Mostly Sunny
Saturday Night
Low: 70 °F
Chance
T-storms

Detailed Forecast

Overnight

Mostly cloudy, with a low around 73. Calm wind.

Wednesday

A chance of showers and thunderstorms before 3pm, then showers likely and possibly a thunderstorm between 3pm and 5pm, then showers and thunderstorms likely after 5pm. Some of the storms could produce heavy rainfall. Partly sunny, with a high near 90. South wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Wednesday Night

Showers and thunderstorms likely, mainly before 8pm. Some of the storms could produce heavy rainfall. Mostly cloudy, with a low around 73. South wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Thursday

A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 92. Heat index values as high as 101. West wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Thursday Night

Showers likely and possibly a thunderstorm before 8pm. Partly cloudy, with a low around 75. Southwest wind around 5 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Friday

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

Friday Night

A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 66. Chance of precipitation is 30%.

Saturday

Mostly sunny, with a high near 85.

Saturday Night

A chance of thunderstorms before 8pm, then a chance of showers and thunderstorms between 8pm and 2am, then a chance of showers after 2am. Mostly cloudy, with a low around 70. Chance of precipitation is 40%.

Sunday

A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 84. Chance of precipitation is 70%.

Sunday Night

Showers and thunderstorms likely. Mostly cloudy, with a low around 68. Chance of precipitation is 60%.

Monday

A chance of showers and thunderstorms. Mostly sunny, with a high near 85. Chance of precipitation is 30%.

Monday Night

A chance of showers and thunderstorms. Partly cloudy, with a low around 66. Chance of precipitation is 30%.

Tuesday

A chance of showers and thunderstorms. Partly sunny, with a high near 85. Chance of precipitation is 30%.