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

Heavy Rain and Flooding Threat in the Ohio Valley

Gulf moisture will combine with a cold front and will bring heavy rain and scattered flash flooding over parts of the Mid-South into the Ohio Valley through the morning and the Ohio Valley and Central Appalachians on Tuesday. Showers and thunderstorms, some severe, are expected over the Southern Rockies/Southern High Plains on Tuesday. Read More >

Current conditions at

Philadelphia - Wings Field Airport (KLOM)

Lat: 40.14°NLon: 75.27°WElev: 282ft.

Partly Cloudy

72°F

22°C

Humidity 74%
Wind Speed S 8 mph
Barometer 30.18 in
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 7 Oct 10:35 am EDT
Extended Forecast for

Merion Station PA

  • Today

    Today: Mostly sunny, with a high near 81. South wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 81 °F

    Mostly Sunny

  • Tonight

    Tonight: Showers likely, with thunderstorms also possible after 5am. Cloudy, with a low around 61. South wind around 10 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 61 °F

    Chance
    Showers then
    Showers
    Likely

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm before 8am, then showers between 8am and 2pm. High near 68. West wind around 10 mph becoming north in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    High: 68 °F

    Showers

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 44. North wind around 10 mph.

    Low: 44 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 61. North wind 5 to 10 mph.

    High: 61 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 41.

    Low: 41 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 65.

    High: 65 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 46.

    Low: 46 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 67.

    High: 67 °F

    Partly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 81. South wind 5 to 10 mph, with gusts as high as 20 mph.
Tonight
Showers likely, with thunderstorms also possible after 5am. Cloudy, with a low around 61. South wind around 10 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday
Showers and possibly a thunderstorm before 8am, then showers between 8am and 2pm. High near 68. West wind around 10 mph becoming north in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Wednesday Night
Mostly clear, with a low around 44. North wind around 10 mph.
Thursday
Sunny, with a high near 61. North wind 5 to 10 mph.
Thursday Night
Clear, with a low around 41.
Friday
Sunny, with a high near 65.
Friday Night
Partly cloudy, with a low around 46.
Saturday
Partly sunny, with a high near 67.
Saturday Night
Mostly cloudy, with a low around 51.
Sunday
Partly sunny, with a high near 65.
Sunday Night
Partly cloudy, with a low around 49.
Columbus Day
Mostly sunny, with a high near 67.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Merion Station PA
 40.01°N 75.26°W (Elev. 299 ft)
Last Update:
4:10 am EDT Oct 7, 2025
Forecast Valid:
10am EDT Oct 7, 2025-6pm EDT Oct 13, 2025
 
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