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

Flood Watch in effect from July 31, 02:00 PM EDT until August 1, 06:00 AM EDT

Current conditions at

Chester County Airport (KMQS)

Lat: 39.98°NLon: 75.87°WElev: 659ft.

Fair

75°F

24°C

Humidity	100%
Wind Speed	Calm
Barometer	30.00 in
Dewpoint	75°F (24°C)
Visibility	10.00 mi
Last update	31 Jul 2:15 am EDT

More Information:

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

Extended Forecast for

Coatesville PA

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

Click here for hazard details and duration

Flood Watch

Overnight
Low: 73 °F
Partly Cloudy
Thursday
High: 85 °F
Chance
T-storms then
Heavy Rain
Thursday Night
Low: 65 °F
Heavy Rain
Friday
High: 72 °F
Showers
Likely then
Chance
T-storms
Friday Night
Low: 59 °F
Slight Chance
Showers
Saturday
High: 78 °F
Sunny
Saturday Night
Low: 58 °F
Mostly Clear
Sunday
High: 81 °F
Sunny
Sunday Night
Low: 60 °F
Partly Cloudy

Detailed Forecast

Overnight

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

Thursday

A chance of showers and thunderstorms before 2pm, then showers and possibly a thunderstorm between 2pm and 4pm, then showers and thunderstorms likely after 4pm. Some of the storms could produce heavy rainfall. High near 85. Calm wind becoming east around 5 mph in the afternoon. Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.

Thursday Night

Showers and thunderstorms likely, then showers and possibly a thunderstorm after 7pm. Some of the storms could produce heavy rainfall. Low around 65. Northeast wind around 5 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

Friday

Showers likely and possibly a thunderstorm before 8am, then a chance of showers and thunderstorms after 8am. Mostly cloudy, with a high near 72. Northeast wind around 10 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Friday Night

A slight chance of showers before 2am. Partly cloudy, with a low around 59. North wind around 5 mph. Chance of precipitation is 20%.

Saturday

Sunny, with a high near 78.

Saturday Night

Mostly clear, with a low around 58.

Sunday

Sunny, with a high near 81.

Sunday Night

Partly cloudy, with a low around 60.

Monday

Mostly sunny, with a high near 83.