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

Heavy Rainfall and Flooding in the Southwest and Along the East Coast

A multi-day heavy rainfall event is set to begin across New Mexico into west Texas Tuesday through Wednesday. Flash flooding and debris flows in the vicinity of burn scars will also be possible. A strong coastal low will develop offshore of the Mid-Atlantic coast midweek, bringing heavy rainfall, strong winds and coastal flooding to much of the East Coast through Friday. Read More >

Current conditions at

Chester County Airport (KMQS)

Lat: 39.98°NLon: 75.87°WElev: 659ft.

Overcast

60°F

16°C

Humidity 100%
Wind Speed E 5 mph
Barometer 30.16 in
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Last update 22 Sep 1:15 am EDT
Extended Forecast for

Coatesville PA

  • Overnight

    Overnight: Showers, mainly after 3am. Low around 52. Northeast wind 5 to 10 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 52 °F

    Showers

  • Tuesday

    Tuesday: Showers, mainly before 11am. High near 60. Northeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 60 °F

    Showers then
    Chance
    Showers

  • Tuesday Night

    Tuesday Night: A chance of showers before 11pm, then a chance of showers after 2am. Mostly cloudy, with a low around 50. Northeast wind 10 to 15 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 50 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A slight chance of showers between 7am and 2pm. Mostly cloudy, with a high near 61. Northeast wind around 15 mph. Chance of precipitation is 20%.

    High: 61 °F

    Slight Chance
    Showers

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 49. Northeast wind around 10 mph.

    Low: 49 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 62.

    High: 62 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 48.

    Low: 48 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 64.

    High: 64 °F

    Mostly Sunny

  • Friday Night

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

    Low: 50 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Showers, mainly after 3am. Low around 52. Northeast wind 5 to 10 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday
Showers, mainly before 11am. High near 60. Northeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday Night
A chance of showers before 11pm, then a chance of showers after 2am. Mostly cloudy, with a low around 50. Northeast wind 10 to 15 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday
A slight chance of showers between 7am and 2pm. Mostly cloudy, with a high near 61. Northeast wind around 15 mph. Chance of precipitation is 20%.
Wednesday Night
Mostly cloudy, with a low around 49. Northeast wind around 10 mph.
Thursday
Partly sunny, with a high near 62.
Thursday Night
Mostly cloudy, with a low around 48.
Friday
Mostly sunny, with a high near 64.
Friday Night
Mostly cloudy, with a low around 50.
Saturday
Partly sunny, with a high near 64.
Saturday Night
Partly cloudy, with a low around 50.
Sunday
Mostly sunny, with a high near 67.
Sunday Night
Partly cloudy, with a low around 51.
Monday
Mostly sunny, with a high near 69.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Coatesville PA
 39.99°N 75.85°W (Elev. 597 ft)
Last Update:
4:10 pm EDT Sep 21, 2026
Forecast Valid:
1am EDT Sep 22, 2026-6pm EDT Sep 28, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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