National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Accumulating Snow Expected Saturday Night into Sunday Morning

A storm system will bring accumulating snow across the region Saturday night through Sunday morning, followed by bitter cold temperatures into early next week. View this briefing for details. Read More >

Hazardous Weather Conditions

Current conditions at

Chester County Airport (KMQS)

Lat: 39.98°NLon: 75.87°WElev: 659ft.

Light Snow

32°F

0°C

Humidity 100%
Wind Speed Calm
Barometer 29.94 in
Dewpoint 32°F (0°C)
Visibility 1.25 mi
Last update 14 Dec 2:55 am EST
Extended Forecast for

South Coatesville PA

Winter Storm Warning until December 14, 01:00pm
Click here for hazard details and duration
Winter Storm Warning
  •  
    Winter Storm Warning until December 14, 01:00pm

    NOW until 1:00pm Sun

    Winter Storm Warning

  • Overnight

    Low: 30 °F

    Heavy Snow

  • Sunday

    Sunday: Snow, mainly before 9am. The snow could be heavy at times. Areas of blowing snow. Temperature falling to around 19 by 5pm. Blustery, with a northwest wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.

    High: 28 °F⇓

    Heavy Snow
    and Areas
    Blowing Snow

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 13. Wind chill values as low as -3. Blustery, with a northwest wind 15 to 20 mph, with gusts as high as 30 mph.

    Low: 13 °F

    Partly Cloudy
    and Blustery
    then Mostly
    Clear

  • Monday

    Monday: A slight chance of snow showers after 1pm. Increasing clouds, with a high near 27. West wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    High: 27 °F

    Mostly Sunny
    then Slight
    Chance Snow
    Showers

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 15. Southwest wind around 5 mph becoming calm in the evening.

    Low: 15 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 30.

    High: 30 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 22.

    Low: 22 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 43.

    High: 43 °F

    Partly Sunny

Detailed Forecast

Overnight
Snow. The snow could be heavy at times. Steady temperature around 30. Northwest wind 5 to 10 mph. Chance of precipitation is 100%. Total nighttime snow accumulation of 3 to 5 inches possible.
Sunday
Snow, mainly before 9am. The snow could be heavy at times. Areas of blowing snow. Temperature falling to around 19 by 5pm. Blustery, with a northwest wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.
Sunday Night
Mostly clear, with a low around 13. Wind chill values as low as -3. Blustery, with a northwest wind 15 to 20 mph, with gusts as high as 30 mph.
Monday
A slight chance of snow showers after 1pm. Increasing clouds, with a high near 27. West wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Monday Night
Mostly cloudy, with a low around 15. Southwest wind around 5 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 30.
Tuesday Night
Partly cloudy, with a low around 22.
Wednesday
Partly sunny, with a high near 43.
Wednesday Night
Partly cloudy, with a low around 25.
Thursday
Partly sunny, with a high near 48.
Thursday Night
Rain. Low around 39. Chance of precipitation is 80%.
Friday
Mostly sunny, with a high near 42.
Friday Night
Partly cloudy, with a low around 23.
Saturday
Partly sunny, with a high near 41.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
South Coatesville PA
 39.96°N 75.82°W (Elev. 420 ft)
Last Update:
1:05 am EST Dec 14, 2025
Forecast Valid:
3am EST Dec 14, 2025-6pm EST Dec 20, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation