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

Watching Hurricane Erin; Heavy Rainfall Threat for Upper Midwest; Heatrisk for Mississippi Valley

Hurricane Erin continues to track westward with its outer bands bringing heavy rainfall and gusty winds for Puerto Rico and US Virgin Islands. Life-threatening surf and rip currents are occurring and will spread across the Atlantic coasts this week. Meanwhile, heavy rainfall and possible flooding are in the forecast for upper Midwest through Monday. Heatrisk continues for the Mississippi Valley. Read More >

Current conditions at

Chester County Airport (KMQS)

Lat: 39.98°NLon: 75.87°WElev: 659ft.

Fair

72°F

22°C

Humidity 100%
Wind Speed N 9 mph
Barometer 29.95 in
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Last update 18 Aug 3:15 am EDT
Extended Forecast for

3 Miles NNW Pomeroy PA

  • Overnight

    Overnight: Mostly cloudy, with a low around 65. North wind around 10 mph.

    Low: 65 °F

    Mostly Cloudy

  • Monday

    Monday: A slight chance of showers between 2pm and 3pm. Mostly cloudy, with a high near 72. Northeast wind 10 to 15 mph. Chance of precipitation is 20%.

    High: 72 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Monday Night

    Monday Night: A slight chance of showers. Mostly cloudy, with a low around 61. East wind 5 to 10 mph. Chance of precipitation is 20%.

    Low: 61 °F

    Slight Chance
    Showers

  • Tuesday

    Tuesday: Partly sunny, with a high near 75. East wind around 10 mph.

    High: 75 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 60. East wind 5 to 10 mph.

    Low: 60 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A slight chance of showers after 2pm. Partly sunny, with a high near 79. Chance of precipitation is 20%.

    High: 79 °F

    Partly Sunny
    then Slight
    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 61.

    Low: 61 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 80.

    High: 80 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 60.

    Low: 60 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly cloudy, with a low around 65. North wind around 10 mph.
Monday
A slight chance of showers between 2pm and 3pm. Mostly cloudy, with a high near 72. Northeast wind 10 to 15 mph. Chance of precipitation is 20%.
Monday Night
A slight chance of showers. Mostly cloudy, with a low around 61. East wind 5 to 10 mph. Chance of precipitation is 20%.
Tuesday
Partly sunny, with a high near 75. East wind around 10 mph.
Tuesday Night
Partly cloudy, with a low around 60. East wind 5 to 10 mph.
Wednesday
A slight chance of showers after 2pm. Partly sunny, with a high near 79. Chance of precipitation is 20%.
Wednesday Night
Partly cloudy, with a low around 61.
Thursday
Mostly sunny, with a high near 80.
Thursday Night
Mostly clear, with a low around 60.
Friday
Sunny, with a high near 81.
Friday Night
Mostly clear, with a low around 62.
Saturday
Mostly sunny, with a high near 82.
Saturday Night
A chance of showers. Partly cloudy, with a low around 65. Chance of precipitation is 30%.
Sunday
A chance of showers. Partly sunny, with a high near 81. Chance of precipitation is 40%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NNW Pomeroy PA
 40°N 75.93°W (Elev. 699 ft)
Last Update:
4:11 pm EDT Aug 17, 2025
Forecast Valid:
3am EDT Aug 18, 2025-6pm EDT Aug 24, 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