Severe Thunderstorms in the Midwest and Arizona; Heat Continues in the Southeast and Southwest

Thunderstorms, some severe, may lead to scattered instances of flash flooding across the Midwest and Ohio Valley and southern Arizona. The threat will shift to the Mid-Atlantic coast on Thursday. Dangerous heat persists in the South and Southeast while building into the Southwest. Overnight lows will be so warm that little-to-no relief from the scorching daytime highs will be available. Read More >

Hazardous Weather Conditions

Flood Watch in effect from August 20, 12:00 PM EDT until August 21, 02:00 AM EDT

Current conditions at

Philadelphia, Philadelphia International Airport (KPHL)

Lat: 39.87°NLon: 75.23°WElev: 7ft.

Partly Cloudy

86°F

30°C

Humidity	42%
Wind Speed	W 7 mph
Barometer	29.90 in (1012.5 mb)
Dewpoint	60°F (16°C)
Visibility	10.00 mi
Heat Index	86°F (30°C)
Last update	19 Aug 6:54 pm EDT

More Information:

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

Extended Forecast for

2 Miles NNE Cheyney PA

Flood Watch August 20, 12:00pm until August 21, 02:00am

Click here for hazard details and duration

Flood Watch

Tonight
Low: 68 °F
Partly Cloudy
Thursday
High: 80 °F
Slight Chance
T-storms then
Showers
Thursday Night
Low: 63 °F
Showers
Likely then
Slight Chance
Showers
Friday
High: 80 °F
Partly Sunny
then Chance
Showers
Friday Night
Low: 66 °F
Chance
Showers
Saturday
High: 80 °F
Chance
Showers then
Showers
Likely
Saturday Night
Low: 66 °F
Showers
Likely
Sunday
High: 82 °F
Partly Sunny
then Chance
T-storms
Sunday Night
Low: 64 °F
Chance
T-storms then
Mostly Clear

Detailed Forecast

Tonight

Partly cloudy, with a low around 68. Calm wind becoming west around 5 mph.

Thursday

A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 2pm. High near 80. Calm wind becoming east around 5 mph in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.

Thursday Night

Showers and thunderstorms likely before 10pm, then a slight chance of showers between 10pm and 2am. Mostly cloudy, with a low around 63. Northeast wind 5 to 10 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.

Friday

A chance of showers after 2pm. Partly sunny, with a high near 80. Northeast wind around 5 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

Friday Night

A chance of showers. Mostly cloudy, with a low around 66. Northeast wind around 5 mph becoming calm. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

Saturday

A chance of showers before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 80. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Saturday Night

Showers likely and possibly a thunderstorm before 8pm, then a chance of showers between 8pm and 2am. Mostly cloudy, with a low around 66. Chance of precipitation is 60%.

Sunday

A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 82. Chance of precipitation is 40%.

Sunday Night

A chance of showers and thunderstorms before 8pm. Mostly clear, with a low around 64. Chance of precipitation is 30%.

Monday

Sunny, with a high near 80.

Monday Night

Mostly clear, with a low around 62.

Tuesday

Sunny, with a high near 80.

Tuesday Night

Partly cloudy, with a low around 63.