Heavy Rainfall and Severe Thunderstorm Threats; Heat Risk Expands; Monitoring the Tropics

Flash flooding risks continue for portions of the Four Corners and Great Basin through today. Severe thunderstorms are outlooked from the eastern Great Lakes, southern New England into the mid-Atlantic through Tuesday. Heat risk increases and expands across the center of the nation and across the Ohio Valley and mid-Atlantic this week. Continue to closely monitor tropical development in the Gulf. Read More >

Current conditions at

Chester County Airport (KMQS)

Lat: 39.98°NLon: 75.87°WElev: 659ft.

Mostly Cloudy

73°F

23°C

Humidity	92%
Wind Speed	Calm
Barometer	30.07 in
Dewpoint	71°F (22°C)
Visibility	10.00 mi
Last update	31 Aug 7:35 pm EDT

More Information:

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

Extended Forecast for

2 Miles N Unionville PA

Tonight
Low: 70 °F
Slight Chance
T-storms
Tuesday
High: 89 °F
Slight Chance
T-storms
Tuesday Night
Low: 71 °F
Chance
T-storms and
Patchy Fog
Wednesday
High: 84 °F
Chance
Showers and
Patchy Fog
Wednesday Night
Low: 70 °F
Chance
T-storms
Thursday
High: 90 °F
Mostly Sunny
then Chance
T-storms
Thursday Night
Low: 71 °F
Chance
T-storms
Friday
High: 85 °F
Mostly Sunny
Friday Night
Low: 64 °F
Partly Cloudy

Detailed Forecast

Tonight

A slight chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 70. South wind around 5 mph. Chance of precipitation is 20%.

Tuesday

A slight chance of showers and thunderstorms after 11am. Partly sunny, with a high near 89. West wind 5 to 10 mph. Chance of precipitation is 20%.

Tuesday Night

A chance of showers and thunderstorms, mainly before 2am. Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 71. Southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Wednesday

A chance of showers and thunderstorms before 2pm, then a chance of showers between 2pm and 5pm, then a chance of showers and thunderstorms after 5pm. Patchy fog before 8am. Otherwise, mostly cloudy, with a high near 84. Northeast wind around 5 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Wednesday Night

A chance of showers and thunderstorms. Mostly cloudy, with a low around 70. Southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Thursday

A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 90. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Thursday Night

A chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 71. Chance of precipitation is 40%.

Friday

Mostly sunny, with a high near 85.

Friday Night

Partly cloudy, with a low around 64.

Saturday

Sunny, with a high near 80.

Saturday Night

Mostly clear, with a low around 58.

Sunday

Sunny, with a high near 77.