Showers and Thunderstorms for the Eastern Third of the Country; Fire Weather Concerns; Flooding Issues for the Great Lakes Region

Showers and thunderstorms will continue along and ahead of a cold front for the eastern third of the country. The rainfall for the Great Lakes region could prolong the ongoing flooding. Much cooler weather will filter in behind this cold front along and east of the Rockies. Where the rain is needed, the Southern High Plains, critical fire weather concerns through this weekend. Read More >

Hazardous Weather Conditions

Current conditions at

Altoona - Blair County Airport (KAOO)

Lat: 40.3°NLon: 78.32°WElev: 1467ft.

Fair

63°F

17°C

Humidity 68%
Wind Speed W 3 mph
Barometer 29.97 in (1014.3 mb)
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 18 Apr 8:53 am EDT
Extended Forecast for

4 Miles WNW Williamsburg PA

  • Today

    Today: A chance of showers and thunderstorms after 5pm.  Increasing clouds, with a high near 82. South wind 5 to 13 mph, with gusts as high as 24 mph.  Chance of precipitation is 30%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 82 °F

    Mostly Sunny
    then Chance
    Showers

  • Tonight

    Tonight: Showers and thunderstorms.  Low around 42. Southwest wind 6 to 9 mph, with gusts as high as 21 mph.  Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 42 °F

    Showers

  • Sunday

    Sunday: Showers likely, mainly before 7am.  Cloudy, then gradually becoming mostly sunny, with a high near 53. Northwest wind 11 to 14 mph, with gusts as high as 29 mph.  Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 53 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: A chance of rain showers after 8pm, mixing with snow after 5am.  Mostly cloudy, with a low around 34. West wind 5 to 7 mph.  Chance of precipitation is 30%.

    Low: 34 °F

    Chance
    Showers then
    Chance
    Rain/Snow

  • Monday

    Monday: A chance of snow showers, mainly before 8am.  Mostly sunny, with a high near 47. Northwest wind 8 to 11 mph, with gusts as high as 23 mph.  Chance of precipitation is 30%.

    High: 47 °F

    Chance Snow
    Showers

  • Monday Night

    Monday Night: Widespread frost after 5am.  Otherwise, mostly clear, with a low around 27.

    Low: 27 °F

    Mostly Clear
    then Frost

  • Tuesday

    Tuesday: Sunny, with a high near 62.

    High: 62 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A chance of showers.  Partly cloudy, with a low around 45. Chance of precipitation is 30%.

    Low: 45 °F

    Chance
    Showers

  • Wednesday

    Wednesday: Mostly sunny, with a high near 68.

    High: 68 °F

    Mostly Sunny

Detailed Forecast

Today
A chance of showers and thunderstorms after 5pm. Increasing clouds, with a high near 82. South wind 5 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 30%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers and thunderstorms. Low around 42. Southwest wind 6 to 9 mph, with gusts as high as 21 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Sunday
Showers likely, mainly before 7am. Cloudy, then gradually becoming mostly sunny, with a high near 53. Northwest wind 11 to 14 mph, with gusts as high as 29 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Sunday Night
A chance of rain showers after 8pm, mixing with snow after 5am. Mostly cloudy, with a low around 34. West wind 5 to 7 mph. Chance of precipitation is 30%.
Monday
A chance of snow showers, mainly before 8am. Mostly sunny, with a high near 47. Northwest wind 8 to 11 mph, with gusts as high as 23 mph. Chance of precipitation is 30%.
Monday Night
Widespread frost after 5am. Otherwise, mostly clear, with a low around 27.
Tuesday
Sunny, with a high near 62.
Tuesday Night
A chance of showers. Partly cloudy, with a low around 45. Chance of precipitation is 30%.
Wednesday
Mostly sunny, with a high near 68.
Wednesday Night
Mostly clear, with a low around 44.
Thursday
Sunny, with a high near 76.
Thursday Night
Mostly clear, with a low around 50.
Friday
Mostly sunny, with a high near 80.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles WNW Williamsburg PA
 40.48°N 78.26°W (Elev. 902 ft)
8:06 am EDT Apr 18, 2026
9am EDT Apr 18, 2026-6pm EDT Apr 24, 2026
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database