Wildfire Smoke and Severe Thunderstorms in the East; Monsoon Thunderstorms in the Southwest

Wildfire smoke continues to impact air quality from the Great Lakes region into New England and the Mid-Atlantic today with widespread Air Quality Alerts in effect. Severe thunderstorms are expected across portions of the Ohio Valley and Lower Great Lakes into the Mid-Atlantic and Northeast, this afternoon into the evening. Monsoonal thunderstorms may bring areas of flooding to the Southwest. Read More >

Current conditions at

York, York Airport (KTHV)

Lat: 39.92°NLon: 76.88°WElev: 479ft.

Overcast with Haze

76°F

24°C

Humidity 85%
Wind Speed Calm
Barometer 29.94 in (1013.7 mb)
Dewpoint 71°F (22°C)
Visibility 2.50 mi
Heat Index77°F (25°C)
Last update 18 Jul 9:53 am EDT
Extended Forecast for

Dallastown PA

Flood Watch until July 19, 12:00am
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch until July 19, 12:00am

    NOW until 12:00am Sun

    Flood Watch

  • Today

    High: 88 °F

    Severe
    Thunderstorms

  • Tonight

    Tonight: A chance of showers and thunderstorms before 1am, then a slight chance of showers between 1am and 2am. Some of the storms could be severe.  Mostly cloudy, with a low around 68. Southwest wind 8 to 10 mph, with gusts as high as 20 mph.  Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 68 °F

    Severe
    Thunderstorms

  • Sunday

    Sunday: Sunny, with a high near 81. North wind around 10 mph.

    High: 81 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 59. Light northeast wind.

    Low: 59 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 83. Calm wind becoming southeast around 6 mph in the afternoon.

    High: 83 °F

    Sunny

  • Monday Night

    Monday Night: A chance of showers and thunderstorms after 2am.  Mostly cloudy, with a low around 66. Chance of precipitation is 30%.

    Low: 66 °F

    Partly Cloudy
    then Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers, then showers likely and possibly a thunderstorm after 2pm.  Mostly cloudy, with a high near 85. Chance of precipitation is 70%.

    High: 85 °F

    Chance
    Showers then
    Showers
    Likely

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm before 2am, then a chance of showers.  Low around 68. Chance of precipitation is 80%.

    Low: 68 °F

    Showers

Detailed Forecast

Today
A chance of showers, then showers and thunderstorms likely after 11am. Some of the storms could be severe. Patchy smoke before 11am. Mostly cloudy, with a high near 88. Southwest wind 9 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
A chance of showers and thunderstorms before 1am, then a slight chance of showers between 1am and 2am. Some of the storms could be severe. Mostly cloudy, with a low around 68. Southwest wind 8 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday
Sunny, with a high near 81. North wind around 10 mph.
Sunday Night
Mostly clear, with a low around 59. Light northeast wind.
Monday
Sunny, with a high near 83. Calm wind becoming southeast around 6 mph in the afternoon.
Monday Night
A chance of showers and thunderstorms after 2am. Mostly cloudy, with a low around 66. Chance of precipitation is 30%.
Tuesday
A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 85. Chance of precipitation is 70%.
Tuesday Night
Showers and possibly a thunderstorm before 2am, then a chance of showers. Low around 68. Chance of precipitation is 80%.
Wednesday
A chance of showers before 8am, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 83. Chance of precipitation is 30%.
Wednesday Night
A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 60. Chance of precipitation is 30%.
Thursday
Sunny, with a high near 80.
Thursday Night
Mostly clear, with a low around 60.
Friday
Mostly sunny, with a high near 82.
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ABOUT THIS FORECAST

 
Point Forecast:
Dallastown PA
 39.9°N 76.65°W (Elev. 850 ft)
10:36 am EDT Jul 18, 2026
10am EDT Jul 18, 2026-6pm EDT Jul 24, 2026
 
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Additional Resources

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