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

Flooding Risks from Tropical Moisture Across the Southeast and Southwest

Tropical moisture from Isaias and Rachel will impact portions of the Southeast and Southwest this weekend. Flash flooding, strong winds and even a threat for severe thunderstorms and tornadoes are possible. Meanwhile, strong winds and dry fuels are raising fire weather concerns across the central Great Basin and western High Plains. Across the northern Rockies, first winter storm of the season. Read More >

Current conditions at

New Castle Municipal Airport (KUCP)

Lat: 41.02°NLon: 80.42°WElev: 1072ft.

Fair

64°F

18°C

Humidity 56%
Wind Speed E 6 mph
Barometer 30.29 in (1027.4 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 10 Oct 5:56 pm EDT
Extended Forecast for

Mercer PA

  • Tonight

    Tonight: Showers likely, mainly after 5am. Mostly cloudy, with a low around 54. Southeast wind 11 to 15 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 54 °F

    Mostly Cloudy
    then Showers
    Likely

  • Sunday

    Sunday: Showers, mainly before 4pm. High near 65. East wind 14 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.

    High: 65 °F

    Showers

  • Sunday Night

    Sunday Night: A chance of showers, mainly before 8pm. Patchy fog between 1am and 2am. Otherwise, mostly cloudy, with a low around 57. Northeast wind around 6 mph becoming calm in the evening. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 57 °F

    Chance
    Showers then
    Patchy Fog

  • Columbus Day

    Columbus Day: Cloudy, then gradually becoming mostly sunny, with a high near 72. Northwest wind around 7 mph.

    High: 72 °F

    Decreasing
    Clouds

  • Monday Night

    Monday Night: Partly cloudy, with a low around 58. South wind 5 to 7 mph.

    Low: 58 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 79. Chance of precipitation is 30%.

    High: 79 °F

    Mostly Sunny
    then Chance
    Showers

  • Tuesday Night

    Tuesday Night: A chance of showers before 2am. Mostly cloudy, with a low around 60. Chance of precipitation is 30%.

    Low: 60 °F

    Chance
    Showers

  • Wednesday

    Wednesday: Partly sunny, with a high near 69.

    High: 69 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 50.

    Low: 50 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Showers likely, mainly after 5am. Mostly cloudy, with a low around 54. Southeast wind 11 to 15 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Sunday
Showers, mainly before 4pm. High near 65. East wind 14 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Sunday Night
A chance of showers, mainly before 8pm. Patchy fog between 1am and 2am. Otherwise, mostly cloudy, with a low around 57. Northeast wind around 6 mph becoming calm in the evening. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Columbus Day
Cloudy, then gradually becoming mostly sunny, with a high near 72. Northwest wind around 7 mph.
Monday Night
Partly cloudy, with a low around 58. South wind 5 to 7 mph.
Tuesday
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 79. Chance of precipitation is 30%.
Tuesday Night
A chance of showers before 2am. Mostly cloudy, with a low around 60. Chance of precipitation is 30%.
Wednesday
Partly sunny, with a high near 69.
Wednesday Night
Mostly cloudy, with a low around 50.
Thursday
A chance of showers before 2pm. Partly sunny, with a high near 67. Chance of precipitation is 30%.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 50. Chance of precipitation is 50%.
Friday
Showers likely. Mostly cloudy, with a high near 64. Chance of precipitation is 60%.
Friday Night
A chance of showers. Mostly cloudy, with a low around 41. Chance of precipitation is 40%.
Saturday
A chance of showers. Partly sunny, with a high near 55. Chance of precipitation is 30%.
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ABOUT THIS FORECAST

 
Point Forecast:
Mercer PA
 41.23°N 80.25°W (Elev. 1234 ft)
Last Update:
4:01 pm EDT Oct 10, 2026
Forecast Valid:
6pm EDT Oct 10, 2026-6pm EDT Oct 17, 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