Strong Atmospheric River Bringing Heavy Rain to the Pacific Northwest; Areas of Snow in the North-Central and Eastern U.S.

A strong atmospheric river will bring prolonged heavy rainfall along with gusty winds to the Pacific Northwest through much of this week. The heavy rainfall may lead to widespread urban and river flooding. Accumulating snow is expected over parts of the central Appalachians and Mid-Atlantic today as well as the Upper Midwest and the Upper Great Lakes this evening into Tuesday. Read More >

Current conditions at

Chester County Airport (KMQS)

Lat: 39.98°NLon: 75.87°WElev: 659ft.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

3 Miles NNE Unionville PA

  • Tonight

    Tonight: Cloudy during the early evening, then gradual clearing, with a low around 13. North wind around 5 mph.

    Low: 13 °F

    Gradual
    Clearing

  • Tuesday

    Tuesday: Increasing clouds, with a high near 33. Calm wind becoming south around 5 mph in the afternoon.

    High: 33 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 26. Southwest wind around 5 mph.

    Low: 26 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Rain likely, mainly after 1pm.  Mostly cloudy, with a high near 43. South wind 5 to 10 mph, with gusts as high as 25 mph.  Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 43 °F

    Chance Rain
    then Rain
    Likely

  • Wednesday Night

    Wednesday Night: A slight chance of rain before 1am.  Mostly cloudy, with a low around 31. West wind around 10 mph.  Chance of precipitation is 20%.

    Low: 31 °F

    Slight Chance
    Rain

  • Thursday

    Thursday: Mostly sunny, with a high near 39.

    High: 39 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 23.

    Low: 23 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 37.

    High: 37 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A chance of snow.  Mostly cloudy, with a low around 23. Chance of precipitation is 40%.

    Low: 23 °F

    Chance Snow

Detailed Forecast

Tonight
Cloudy during the early evening, then gradual clearing, with a low around 13. North wind around 5 mph.
Tuesday
Increasing clouds, with a high near 33. Calm wind becoming south around 5 mph in the afternoon.
Tuesday Night
Mostly cloudy, with a low around 26. Southwest wind around 5 mph.
Wednesday
Rain likely, mainly after 1pm. Mostly cloudy, with a high near 43. South wind 5 to 10 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
A slight chance of rain before 1am. Mostly cloudy, with a low around 31. West wind around 10 mph. Chance of precipitation is 20%.
Thursday
Mostly sunny, with a high near 39.
Thursday Night
Mostly cloudy, with a low around 23.
Friday
Mostly sunny, with a high near 37.
Friday Night
A chance of snow. Mostly cloudy, with a low around 23. Chance of precipitation is 40%.
Saturday
Partly sunny, with a high near 35.
Saturday Night
Mostly cloudy, with a low around 19.
Sunday
Mostly sunny, with a high near 31.
Sunday Night
Mostly clear, with a low around 16.
Monday
Mostly sunny, with a high near 32.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NNE Unionville PA
 39.93°N 75.71°W (Elev. 295 ft)
4:10 pm EST Dec 8, 2025
4pm EST Dec 8, 2025-6pm EST Dec 15, 2025
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database