Heat Wave Expands to the East Coast; Flash Flooding Likely in the Central Plains into the Midwest; Severe Thunderstorms in the Northeast

Dangerous, prolonged heat is ongoing in the Mid-South to Mid-Mississippi Valley and heat expands into the Northeast for a brief period today. Widely scattered instances of flash flooding due to heavy rains are forecast from northeast Kansas to much of Indiana. Scattered strong to severe thunderstorms are possible across parts of New England, northern Mid-Atlantic, and North Dakota. Read More >

Current conditions at

Watertown, Watertown Municipal Airport (KATY)

Lat: 44.9°NLon: 97.15°WElev: 1745ft.

Partly Cloudy

71°F

22°C

Humidity 94%
Wind Speed S 15 mph
Barometer 29.84 in (1009.5 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Last update 26 Jul 7:53 am CDT
Extended Forecast for

4 Miles W Altamont SD

  • Today

    Today: Sunny, with a high near 88. South southwest wind 13 to 17 mph, with gusts as high as 30 mph.

    High: 88 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 69. South southwest wind around 10 mph.

    Low: 69 °F

    Partly Cloudy

  • Sunday

    Sunday: A slight chance of showers and thunderstorms after 4pm.  Mostly sunny and hot, with a high near 92. Heat index values as high as 99. South southwest wind 11 to 15 mph, with gusts as high as 25 mph.  Chance of precipitation is 20%.

    High: 92 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms, mainly between 7pm and 1am.  Mostly clear, with a low around 68. South wind 8 to 13 mph becoming north after midnight. Winds could gust as high as 21 mph.  Chance of precipitation is 40%.

    Low: 68 °F

    Chance
    T-storms

  • Monday

    Monday: Sunny, with a high near 85. Northeast wind 9 to 11 mph, with gusts as high as 20 mph.

    High: 85 °F

    Sunny

  • Monday Night

    Monday Night: A chance of showers and thunderstorms. Some of the storms could produce heavy rainfall.  Mostly cloudy, with a low around 65. Northeast wind around 10 mph.  Chance of precipitation is 50%.

    Low: 65 °F

    Heavy Rain

  • Tuesday

    Tuesday: A chance of showers and thunderstorms.  Partly sunny, with a high near 79. East northeast wind around 10 mph.  Chance of precipitation is 30%.

    High: 79 °F

    Chance
    Showers then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms.  Mostly cloudy, with a low around 60. North northeast wind around 10 mph.  Chance of precipitation is 40%.

    Low: 60 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: A slight chance of showers before 1pm.  Partly sunny, with a high near 73. East northeast wind 10 to 13 mph, with gusts as high as 21 mph.  Chance of precipitation is 20%.

    High: 73 °F

    Slight Chance
    Showers

Detailed Forecast

Today
Sunny, with a high near 88. South southwest wind 13 to 17 mph, with gusts as high as 30 mph.
Tonight
Partly cloudy, with a low around 69. South southwest wind around 10 mph.
Sunday
A slight chance of showers and thunderstorms after 4pm. Mostly sunny and hot, with a high near 92. Heat index values as high as 99. South southwest wind 11 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
Sunday Night
A chance of showers and thunderstorms, mainly between 7pm and 1am. Mostly clear, with a low around 68. South wind 8 to 13 mph becoming north after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 40%.
Monday
Sunny, with a high near 85. Northeast wind 9 to 11 mph, with gusts as high as 20 mph.
Monday Night
A chance of showers and thunderstorms. Some of the storms could produce heavy rainfall. Mostly cloudy, with a low around 65. Northeast wind around 10 mph. Chance of precipitation is 50%.
Tuesday
A chance of showers and thunderstorms. Partly sunny, with a high near 79. East northeast wind around 10 mph. Chance of precipitation is 30%.
Tuesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 60. North northeast wind around 10 mph. Chance of precipitation is 40%.
Wednesday
A slight chance of showers before 1pm. Partly sunny, with a high near 73. East northeast wind 10 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.
Wednesday Night
Partly cloudy, with a low around 55.
Thursday
Mostly sunny, with a high near 73.
Thursday Night
Partly cloudy, with a low around 55.
Friday
Mostly sunny, with a high near 72.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles W Altamont SD
 44.85°N 96.78°W (Elev. 1900 ft)
8:00 am CDT Jul 26, 2025
8am CDT Jul 26, 2025-6pm CDT Aug 1, 2025
 
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