Thunderstorms and Heavy Rain in the Mid-South; Heat Continues in the Southeast and Southwest

Severe thunderstorms and heavy rain are expected across portions of the mid-Mississippi Valley into the Ohio Valley and portions of Arizona. Dangerous heat persists in the South and Southeast while building into the Southwest. Overnight lows will be so warm that, when combined with oppressive dew points, little-to-no relief from the scorching daytime highs will be available. Read More >

Current conditions at

Watertown, Watertown International Airport (KART)

Lat: 43.99°NLon: 76.02°WElev: 325ft.

Fair

65°F

18°C

Humidity 87%
Wind Speed S 5 mph
Barometer 29.90 in (1012.0 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 18 Aug 10:56 pm EDT
Extended Forecast for

5 Miles ENE Lacona NY

  • Tonight

    Tonight: Mostly cloudy, with a low around 57. South wind 3 to 6 mph.

    Low: 57 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A chance of showers before 11am, then showers likely and possibly a thunderstorm between 11am and 2pm, then a chance of showers and thunderstorms after 2pm.  Mostly cloudy, with a high near 73. South wind 6 to 8 mph becoming west in the afternoon.  Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 73 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A slight chance of showers between 11pm and 2am.  Partly cloudy, with a low around 55. Light southwest wind.  Chance of precipitation is 20%.

    Low: 55 °F

    Slight Chance
    Showers

  • Thursday

    Thursday: Mostly sunny, with a high near 72. Calm wind becoming west 5 to 7 mph in the afternoon.

    High: 72 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Patchy fog after 11pm.  Otherwise, mostly clear, with a low around 52. Calm wind.

    Low: 52 °F

    Patchy Fog

  • Friday

    Friday: Patchy fog before 9am.  Otherwise, sunny, with a high near 75. Light and variable wind becoming west around 5 mph in the afternoon.

    High: 75 °F

    Patchy Fog
    then Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 57. Calm wind becoming southeast around 6 mph after midnight.

    Low: 57 °F

    Mostly Clear

  • Saturday

    Saturday: A chance of showers after 2pm.  Mostly sunny, with a high near 78. South wind around 8 mph.  Chance of precipitation is 30%.

    High: 78 °F

    Mostly Sunny
    then Chance
    Showers

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms before 8pm, then showers likely and possibly a thunderstorm between 8pm and 2am, then showers after 2am.  Low around 58. Chance of precipitation is 90%.

    Low: 58 °F

    Showers

Detailed Forecast

Tonight
Mostly cloudy, with a low around 57. South wind 3 to 6 mph.
Wednesday
A chance of showers before 11am, then showers likely and possibly a thunderstorm between 11am and 2pm, then a chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 73. South wind 6 to 8 mph becoming west in the afternoon. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
A slight chance of showers between 11pm and 2am. Partly cloudy, with a low around 55. Light southwest wind. Chance of precipitation is 20%.
Thursday
Mostly sunny, with a high near 72. Calm wind becoming west 5 to 7 mph in the afternoon.
Thursday Night
Patchy fog after 11pm. Otherwise, mostly clear, with a low around 52. Calm wind.
Friday
Patchy fog before 9am. Otherwise, sunny, with a high near 75. Light and variable wind becoming west around 5 mph in the afternoon.
Friday Night
Mostly clear, with a low around 57. Calm wind becoming southeast around 6 mph after midnight.
Saturday
A chance of showers after 2pm. Mostly sunny, with a high near 78. South wind around 8 mph. Chance of precipitation is 30%.
Saturday Night
A chance of showers and thunderstorms before 8pm, then showers likely and possibly a thunderstorm between 8pm and 2am, then showers after 2am. Low around 58. Chance of precipitation is 90%.
Sunday
Showers, with thunderstorms also possible after 2pm. High near 71. Chance of precipitation is 80%.
Sunday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 54. Chance of precipitation is 60%.
Monday
A chance of showers. Partly sunny, with a high near 69. Chance of precipitation is 40%.
Monday Night
A chance of showers. Mostly cloudy, with a low around 54. Chance of precipitation is 30%.
Tuesday
Mostly sunny, with a high near 72.
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles ENE Lacona NY
 43.66°N 75.98°W (Elev. 1102 ft)
9:57 pm EDT Aug 18, 2026
11pm EDT Aug 18, 2026-6pm EDT Aug 25, 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