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

Isaias Expected To Be A Strong Hurricane Approaching The Northern Gulf Coast Friday

Isaias is expected to strengthen and be a strong hurricane when it approaches the northern Gulf Coast on Friday. Damaging hurricane-force winds and life-threatening storm surge impacts are expected Friday into Saturday. Isaias will bring heavy rainfall to the northern Gulf Coast and much of the Southeast U.S. Friday into the weekend. Read More >

Current conditions at

Selinsgrove Penn Valley Airport (KSEG)

Lat: 40.82°NLon: 76.87°WElev: 443ft.

Fair

47°F

8°C

Humidity 100%
Wind Speed Calm
Barometer 29.84 in (1010.4 mb)
Dewpoint 47°F (8°C)
Visibility 9.00 mi
Last update 8 Oct 5:53 am EDT
Extended Forecast for

Mechanicsville PA

  • Today

    Today: Sunny, with a high near 69. Light southwest wind becoming west 5 to 9 mph in the morning. Winds could gust as high as 21 mph.

    High: 69 °F

    Sunny

  • Tonight

    Tonight: Patchy fog after 4am. Otherwise, mostly clear, with a low around 44. West wind around 5 mph becoming calm in the evening.

    Low: 44 °F

    Mostly Clear
    then Patchy
    Fog

  • Friday

    Friday: Patchy fog before 9am. Otherwise, sunny, with a high near 67. Calm wind becoming west around 6 mph in the afternoon.

    High: 67 °F

    Patchy Fog
    then Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 44. Calm wind.

    Low: 44 °F

    Mostly Clear

  • Saturday

    Saturday: Patchy fog before 8am. Otherwise, mostly sunny, with a high near 69. Calm wind.

    High: 69 °F

    Patchy Fog
    then Mostly
    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 52.

    Low: 52 °F

    Mostly Cloudy

  • Sunday

    Sunday: Showers likely, mainly after 2pm. Cloudy, with a high near 64. Chance of precipitation is 70%.

    High: 64 °F

    Chance
    Showers then
    Showers
    Likely

  • Sunday Night

    Sunday Night: Showers, mainly before 2am. Low around 57. Chance of precipitation is 80%.

    Low: 57 °F

    Showers

  • Columbus Day

    Columbus Day: A chance of showers before 8am. Mostly cloudy, with a high near 69. Chance of precipitation is 30%.

    High: 69 °F

    Chance
    Showers then
    Partly Sunny

Detailed Forecast

Today
Sunny, with a high near 69. Light southwest wind becoming west 5 to 9 mph in the morning. Winds could gust as high as 21 mph.
Tonight
Patchy fog after 4am. Otherwise, mostly clear, with a low around 44. West wind around 5 mph becoming calm in the evening.
Friday
Patchy fog before 9am. Otherwise, sunny, with a high near 67. Calm wind becoming west around 6 mph in the afternoon.
Friday Night
Mostly clear, with a low around 44. Calm wind.
Saturday
Patchy fog before 8am. Otherwise, mostly sunny, with a high near 69. Calm wind.
Saturday Night
Mostly cloudy, with a low around 52.
Sunday
Showers likely, mainly after 2pm. Cloudy, with a high near 64. Chance of precipitation is 70%.
Sunday Night
Showers, mainly before 2am. Low around 57. Chance of precipitation is 80%.
Columbus Day
A chance of showers before 8am. Mostly cloudy, with a high near 69. Chance of precipitation is 30%.
Monday Night
Mostly cloudy, with a low around 56.
Tuesday
A chance of showers. Partly sunny, with a high near 68. Chance of precipitation is 30%.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 47. Chance of precipitation is 30%.
Wednesday
Mostly sunny, with a high near 58.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mechanicsville PA
 40.98°N 76.6°W (Elev. 968 ft)
Last Update:
6:16 am EDT Oct 8, 2026
Forecast Valid:
6am EDT Oct 8, 2026-6pm EDT Oct 14, 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