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

Hurricane and Storm Surge Watches Issued for the Northern Gulf Coast for Strengthening Tropical Storm Isaias

Tropical Storm Isaias is forecast to track toward the central Gulf Coast while strengthening into a hurricane on Thursday. There is an increasing risk of damaging hurricane-force winds and life-threatening storm surge impacts along portions of the northern Gulf Coast Friday into Saturday. Isaias will bring heavy rainfall to the central Gulf Coast and much of the Southeast Friday into the weekend. Read More >

Hazardous Weather Conditions

Current conditions at

Selinsgrove Penn Valley Airport (KSEG)

Lat: 40.82°NLon: 76.87°WElev: 443ft.

Fair

64°F

18°C

Humidity 54%
Wind Speed S 8 G 20 mph
Barometer 29.95 in (1014.2 mb)
Dewpoint 47°F (8°C)
Visibility 10.00 mi
Last update 7 Oct 12:53 pm EDT
Extended Forecast for

Sunbury PA

  • This Afternoon

    This Afternoon: Sunny, with a high near 70. South wind around 7 mph.

    High: 70 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 53. South wind around 5 mph becoming calm in the evening.

    Low: 53 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 73. Calm wind becoming west 5 to 9 mph in the morning. Winds could gust as high as 20 mph.

    High: 73 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 46. Light and variable wind.

    Low: 46 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 70. Calm wind becoming northwest around 6 mph in the afternoon.

    High: 70 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 47.

    Low: 47 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 74.

    High: 74 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 54.

    Low: 54 °F

    Mostly Cloudy

  • Sunday

    Sunday: Showers likely, mainly after 2pm. Mostly cloudy, with a high near 66. Chance of precipitation is 60%.

    High: 66 °F

    Showers
    Likely

Detailed Forecast

This Afternoon
Sunny, with a high near 70. South wind around 7 mph.
Tonight
Mostly clear, with a low around 53. South wind around 5 mph becoming calm in the evening.
Thursday
Sunny, with a high near 73. Calm wind becoming west 5 to 9 mph in the morning. Winds could gust as high as 20 mph.
Thursday Night
Mostly clear, with a low around 46. Light and variable wind.
Friday
Sunny, with a high near 70. Calm wind becoming northwest around 6 mph in the afternoon.
Friday Night
Mostly clear, with a low around 47.
Saturday
Mostly sunny, with a high near 74.
Saturday Night
Mostly cloudy, with a low around 54.
Sunday
Showers likely, mainly after 2pm. Mostly cloudy, with a high near 66. Chance of precipitation is 60%.
Sunday Night
Showers. Low around 59. Chance of precipitation is 80%.
Columbus Day
Showers likely. Mostly cloudy, with a high near 71. Chance of precipitation is 60%.
Monday Night
Mostly cloudy, with a low around 55.
Tuesday
Partly sunny, with a high near 68.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Sunbury PA
 40.86°N 76.77°W (Elev. 499 ft)
Last Update:
12:15 pm EDT Oct 7, 2026
Forecast Valid:
1pm EDT Oct 7, 2026-6pm EDT Oct 13, 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