Dangerous Heat in the Southwest; Severe Thunderstorms from the Central Plains into the Ohio Valley

Dangerous heat will build across the Southwest U.S. through the end of the week with daytime highs of 110-115°F. Isolated to widely scattered severe storms are expected across parts of the central and southern High Plains, Great Lakes into the Ohio Valley, and parts of the Ozarks to Lower Mississippi Valley today. Read More >

Current conditions at

Harford County Airport (K0W3)

Lat: 39.57°NLon: 76.2°WElev: 412ft.

Fair

73°F

23°C

Humidity 75%
Wind Speed S 6 mph
Barometer 30.01 in
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 26 Aug 8:15 pm EDT
Extended Forecast for

4 Miles WSW Lewisville PA

  • Tonight

    Tonight: Mostly cloudy, with a low around 68. South wind around 6 mph.

    Low: 68 °F

    Mostly Cloudy

  • Thursday

    Thursday: A chance of showers and thunderstorms before 1pm, then showers likely and possibly a thunderstorm between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. Some of the storms could be severe.  Partly sunny, with a high near 84. South wind 6 to 9 mph.  Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    High: 84 °F

    Severe
    Thunderstorms

  • Thursday Night

    Thursday Night: Showers and thunderstorms likely before 4am, then a chance of showers. Some of the storms could be severe.  Patchy fog before 2am, then patchy fog after 3am.  Otherwise, mostly cloudy, with a low around 66. Light and variable wind.  Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 66 °F

    Severe
    Thunderstorms
    and Patchy
    Fog

  • Friday

    Friday: A chance of showers, mainly before 7am.  Mostly sunny, with a high near 83. Calm wind becoming northwest around 5 mph in the morning.  Chance of precipitation is 30%.

    High: 83 °F

    Chance
    Showers then
    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 64. Light north wind.

    Low: 64 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 82.

    High: 82 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 64.

    Low: 64 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 85.

    High: 85 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 68.

    Low: 68 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 68. South wind around 6 mph.
Thursday
A chance of showers and thunderstorms before 1pm, then showers likely and possibly a thunderstorm between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. Some of the storms could be severe. Partly sunny, with a high near 84. South wind 6 to 9 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Thursday Night
Showers and thunderstorms likely before 4am, then a chance of showers. Some of the storms could be severe. Patchy fog before 2am, then patchy fog after 3am. Otherwise, mostly cloudy, with a low around 66. Light and variable wind. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Friday
A chance of showers, mainly before 7am. Mostly sunny, with a high near 83. Calm wind becoming northwest around 5 mph in the morning. Chance of precipitation is 30%.
Friday Night
Partly cloudy, with a low around 64. Light north wind.
Saturday
Sunny, with a high near 82.
Saturday Night
Mostly clear, with a low around 64.
Sunday
Mostly sunny, with a high near 85.
Sunday Night
Partly cloudy, with a low around 68.
Monday
Mostly sunny, with a high near 87.
Monday Night
Partly cloudy, with a low around 70.
Tuesday
Mostly sunny, with a high near 90.
Tuesday Night
A slight chance of showers. Partly cloudy, with a low around 71. Chance of precipitation is 20%.
Wednesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 89. Chance of precipitation is 40%.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles WSW Lewisville PA
 39.71°N 75.93°W (Elev. 400 ft)
7:51 pm EDT Aug 26, 2026
8pm EDT Aug 26, 2026-6pm EDT Sep 2, 2026
 
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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