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

Late January Extreme Cold; Watching East Coast Storm Threat This Weekend

The next blast of Arctic air surges south down the Plains, across the Great Lakes and through the Southeast and East Friday through Saturday. This could be longest duration of cold in several decades. Forecast models are being closely monitored for potential of another significant winter storm to impact the eastern United States this coming weekend. Confidence in coastal impacts has increased. Read More >

Hazardous Weather Conditions

Current conditions at

Philadelphia - Wings Field Airport (KLOM)

Lat: 40.14°NLon: 75.27°WElev: 282ft.

Overcast

16°F

-9°C

Humidity 49%
Wind Speed W 6 mph
Barometer 30.08 in
Dewpoint 0°F (-18°C)
Visibility 10.00 mi
Wind Chill7°F (-14°C)
Last update 28 Jan 6:15 pm EST
Extended Forecast for

Radnor Township PA

Cold Weather Advisory January 28, 06:39pm until January 29, 10:00am
Click here for hazard details and duration
Cold Weather Advisory
  •  
    Cold Weather Advisory January 28, 06:39pm until January 29, 10:00am

    NOW until 10:00am Thu

    Cold Weather Advisory

  • Tonight

    Low: 1 °F

    Scattered
    Flurries

  • Thursday

    Thursday: Mostly sunny, with a high near 18. Wind chill values as low as -12. West wind around 10 mph, with gusts as high as 20 mph.

    High: 18 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 0. Wind chill values as low as -11. West wind 5 to 10 mph.

    Low: 0 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 16. Wind chill values as low as -13. West wind 5 to 10 mph.

    High: 16 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 0. Northwest wind around 5 mph.

    Low: 0 °F

    Partly Cloudy

  • Saturday

    Saturday: A slight chance of snow after 1pm. Partly sunny, with a high near 18. Chance of precipitation is 20%.

    High: 18 °F

    Partly Sunny
    then Slight
    Chance Snow

  • Saturday Night

    Saturday Night: A chance of snow. Mostly cloudy, with a low around 10. Chance of precipitation is 40%.

    Low: 10 °F

    Chance Snow

  • Sunday

    Sunday: A chance of snow. Mostly cloudy, with a high near 21. Blustery. Chance of precipitation is 40%.

    High: 21 °F

    Chance Snow
    and Blustery

Detailed Forecast

Tonight
Scattered flurries before 10pm. Partly cloudy, with a low around 1. Wind chill values as low as -11. West wind 5 to 10 mph.
Thursday
Mostly sunny, with a high near 18. Wind chill values as low as -12. West wind around 10 mph, with gusts as high as 20 mph.
Thursday Night
Mostly clear, with a low around 0. Wind chill values as low as -11. West wind 5 to 10 mph.
Friday
Sunny, with a high near 16. Wind chill values as low as -13. West wind 5 to 10 mph.
Friday Night
Partly cloudy, with a low around 0. Northwest wind around 5 mph.
Saturday
A slight chance of snow after 1pm. Partly sunny, with a high near 18. Chance of precipitation is 20%.
Saturday Night
A chance of snow. Mostly cloudy, with a low around 10. Chance of precipitation is 40%.
Sunday
A chance of snow. Mostly cloudy, with a high near 21. Blustery. Chance of precipitation is 40%.
Sunday Night
Partly cloudy, with a low around 14. Blustery.
Monday
Sunny, with a high near 29.
Monday Night
Partly cloudy, with a low around 15.
Tuesday
Mostly sunny, with a high near 29.
Tuesday Night
Partly cloudy, with a low around 13.
Wednesday
Mostly sunny, with a high near 29.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Radnor Township PA
 40.05°N 75.37°W (Elev. 400 ft)
Last Update:
4:11 pm EST Jan 28, 2026
Forecast Valid:
6pm EST Jan 28, 2026-6pm EST Feb 4, 2026
 
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