Areas of Severe Thunderstorms and Heat

Scattered severe thunderstorms and excessive rainfall are possible today in the Mid Atlantic, posing a risk for damaging winds and isolated flash flooding. Extreme Heat Warnings are in effect today for northeast Texas into southern Oklahoma and Arkansas. Extreme Heat Warnings are also in effect for the Desert Southwest today into Sunday. Read More >

Hazardous Weather Conditions

Flood Watch until August 21, 02:00 AM EDT

Current conditions at

Chester County Airport (KMQS)

Lat: 39.98°NLon: 75.87°WElev: 659ft.

Mostly Cloudy

73°F

23°C

Humidity	95%
Wind Speed	SE 6 mph
Barometer	29.99 in
Dewpoint	72°F (22°C)
Visibility	10.00 mi
Last update	20 Aug 12:55 pm EDT

More Information:

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

Extended Forecast for

2 Miles NNW Thorndale PA

Flood Watch August 20, 01:33pm until August 21, 02:00am

Click here for hazard details and duration

Flood Watch

Flood Watch August 20, 01:33pm until August 21, 02:00am
NOW until 2:00am Fri
Flood Watch
This Afternoon
High: 78 °F
Heavy Rain
Tonight
Low: 61 °F
Heavy Rain
then Mostly
Cloudy
Friday
High: 79 °F
Mostly Sunny
Friday Night
Low: 63 °F
Chance
Showers
Saturday
High: 78 °F
Showers
Likely
Saturday Night
Low: 63 °F
Chance
T-storms then
Chance
Showers
Sunday
High: 80 °F
Partly Sunny
then Chance
Showers
Sunday Night
Low: 59 °F
Chance
Showers then
Clear

Detailed Forecast

This Afternoon

Showers and thunderstorms, mainly after 2pm. Some of the storms could produce heavy rainfall. High near 78. Southeast wind around 5 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.

Tonight

Showers and thunderstorms, mainly before 9pm. Some of the storms could produce heavy rainfall. Low around 61. North wind around 5 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

Friday

Mostly sunny, with a high near 79. Northeast wind around 5 mph.

Friday Night

A slight chance of showers before 10pm, then a chance of showers after 4am. Mostly cloudy, with a low around 63. Calm wind. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

Saturday

Showers likely, with thunderstorms also possible after 11am. Mostly cloudy, with a high near 78. East wind around 5 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Saturday Night

A chance of showers and thunderstorms before 11pm, then a chance of showers between 11pm and 2am. Mostly cloudy, with a low around 63. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Sunday

A chance of showers after 2pm. Partly sunny, with a high near 80. Chance of precipitation is 40%.

Sunday Night

A chance of showers before 8pm. Mostly clear, with a low around 59. Chance of precipitation is 30%.

Monday

Sunny, with a high near 77.

Monday Night

Mostly clear, with a low around 58.

Tuesday

Sunny, with a high near 79.

Tuesday Night

Mostly clear, with a low around 60.