Heat the Southwest; Fire Weather in the Central U.S.; Kona Low Impacting Hawaii

A rare March heat wave is ongoing with much above-normal temperatures over the Southwest U.S. through this weekend. Periods of critical fire weather will persist from the central Rockies to the central and southern Plains through the weekend as gusty winds and low relative humidity continue. A Kona low will continue to bring several rounds of moderate to heavy rainfall to Hawaii through Sunday. Read More >

Hazardous Weather Conditions

Dense Fog Advisory in effect from March 21, 03:25 AM EDT until March 21, 08:00 AM EDT

Current conditions at

Chester County Airport (KMQS)

Lat: 39.98°NLon: 75.87°WElev: 659ft.

Overcast

51°F

11°C

Humidity	100%
Wind Speed	Vrbl 3 mph
Barometer	29.75 in
Dewpoint	51°F (11°C)
Visibility	9.00 mi
Last update	21 Mar 3:15 am EDT

More Information:

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

Extended Forecast for

Chatham PA

Dense Fog Advisory until March 21, 08:00am

Click here for hazard details and duration

Dense Fog Advisory

Dense Fog Advisory until March 21, 08:00am
NOW until 8:00am Sat
Dense Fog Advisory
Overnight
Low: 47 °F
Mostly Cloudy
Saturday
High: 59 °F
Mostly Sunny
Saturday Night
Low: 41 °F
Mostly Cloudy
Sunday
High: 69 °F
Partly Sunny
Sunday Night
Low: 47 °F
Showers
Likely
Monday
High: 51 °F
Showers
Likely then
Chance
Showers
Monday Night
Low: 29 °F
Mostly Clear
Tuesday
High: 47 °F
Sunny

Detailed Forecast

Overnight

Mostly cloudy, with a low around 47. West wind around 5 mph.

Saturday

Mostly sunny, with a high near 59. North wind 10 to 15 mph.

Saturday Night

Mostly cloudy, with a low around 41. Calm wind becoming south around 5 mph after midnight.

Sunday

Partly sunny, with a high near 69. Southwest wind 5 to 10 mph, with gusts as high as 20 mph.

Sunday Night

A chance of showers and thunderstorms, then showers likely after 2am. Mostly cloudy, with a low around 47. South wind 5 to 10 mph becoming northwest after midnight. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

Monday

Showers likely, mainly before 8am. Partly sunny, with a high near 51. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

Monday Night

Mostly clear, with a low around 29.

Tuesday

Sunny, with a high near 47.

Tuesday Night

Mostly cloudy, with a low around 33.

Wednesday

Partly sunny, with a high near 50.

Wednesday Night

Partly cloudy, with a low around 32.

Thursday

Mostly sunny, with a high near 55.