Thunderstorms and Heavy Rainfall in the Plains; Hazardous Heat in the South and Southeast

Severe thunderstorms will be possible across the northern/central Plains through Tuesday afternoon and from the central Plains to the Mid-Mississippi Valley Tuesday evening through Wednesday morning. Storms may produce large hail and damaging wind gusts, and heavy rainfall may lead to scattered instances of flash flooding. Meanwhile, hazardous heat persists across the South and Southeast. Read More >

Current conditions at

Philadelphia - Wings Field Airport (KLOM)

Lat: 40.14°NLon: 75.27°WElev: 282ft.

Fog/Mist

71°F

22°C

Humidity 100%
Wind Speed Calm
Barometer 29.85 in
Dewpoint 71°F (22°C)
Visibility 7.00 mi
Last update 18 Aug 2:15 am EDT
Extended Forecast for

Horsham PA

  • Overnight

    Overnight: Partly cloudy, with a low around 70. Calm wind.

    Low: 70 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 86. North wind around 5 mph.

    High: 86 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 66. Northwest wind around 5 mph becoming calm.

    Low: 66 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 88. Calm wind becoming west around 5 mph in the afternoon.

    High: 88 °F

    Sunny

  • Wednesday Night

    Wednesday Night: A slight chance of showers after 2am.  Partly cloudy, with a low around 69. West wind around 5 mph becoming calm.  Chance of precipitation is 20%.

    Low: 69 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Thursday

    Thursday: A chance of showers before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm.  Partly sunny, with a high near 85. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 85 °F

    Chance
    Showers then
    Showers
    Likely

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm before 8pm, then a chance of showers.  Mostly cloudy, with a low around 66. Chance of precipitation is 60%.

    Low: 66 °F

    Showers
    Likely

  • Friday

    Friday: A chance of showers.  Partly sunny, with a high near 82. Chance of precipitation is 40%.

    High: 82 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers.  Mostly cloudy, with a low around 66. Chance of precipitation is 50%.

    Low: 66 °F

    Chance
    Showers

Detailed Forecast

Overnight
Partly cloudy, with a low around 70. Calm wind.
Tuesday
Sunny, with a high near 86. North wind around 5 mph.
Tuesday Night
Mostly clear, with a low around 66. Northwest wind around 5 mph becoming calm.
Wednesday
Sunny, with a high near 88. Calm wind becoming west around 5 mph in the afternoon.
Wednesday Night
A slight chance of showers after 2am. Partly cloudy, with a low around 69. West wind around 5 mph becoming calm. Chance of precipitation is 20%.
Thursday
A chance of showers before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 85. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday Night
Showers likely and possibly a thunderstorm before 8pm, then a chance of showers. Mostly cloudy, with a low around 66. Chance of precipitation is 60%.
Friday
A chance of showers. Partly sunny, with a high near 82. Chance of precipitation is 40%.
Friday Night
A chance of showers. Mostly cloudy, with a low around 66. Chance of precipitation is 50%.
Saturday
A chance of showers. Partly sunny, with a high near 82. Chance of precipitation is 50%.
Saturday Night
Showers likely. Mostly cloudy, with a low around 67. Chance of precipitation is 60%.
Sunday
A chance of showers. Partly sunny, with a high near 82. Chance of precipitation is 50%.
Sunday Night
Partly cloudy, with a low around 64.
Monday
Sunny, with a high near 82.
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ABOUT THIS FORECAST

 
Point Forecast:
Horsham PA
 40.18°N 75.14°W (Elev. 299 ft)
4:08 pm EDT Aug 17, 2026
2am EDT Aug 18, 2026-6pm EDT Aug 24, 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