Hazardous Weather Conditions

Current conditions at

Lawrence Municipal Airport (KLWM)

Lat: 42.71°NLon: 71.13°WElev: 135ft.

Fair

26°C

78°F

Humidity 82%
Wind Speed Calm
Barometer 1017.4 mb (30.05 in)
Dewpoint 22°C (72°F)
Visibility 16 km
Heat Index27°C (80°F)
Last update 16 Jul 7:54 am EDT
Extended Forecast for

Merrimac MA

Heat Advisory July 16, 08:27am until July 17, 07:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory July 16, 08:27am until July 17, 07:00pm

    NOW until 7:00pm Thu

    Heat Advisory

  • Today

    High: 33 °C

    Hot

  • Tonight

    Tonight: Increasing clouds, with a low around 22. Southwest wind around 8 km/h.

    Low: 22 °C

    Increasing
    Clouds

  • Thursday

    Thursday: Showers and possibly a thunderstorm before 10am, then a chance of showers between 10am and 11am, then a chance of showers and thunderstorms after 11am.  Patchy fog before 10am. High near 32. Heat index values as high as 36. Southwest wind around 11 km/h.  Chance of precipitation is 80%. New rainfall amounts between 2.5 and 5 mm possible.

    High: 32 °C

    Showers and
    Patchy Fog
    then Chance
    Showers

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 11pm.  Partly cloudy, with a low around 23. Southwest wind around 10 km/h.  Chance of precipitation is 30%. New precipitation amounts between 1 and 2.5 mm, except higher amounts possible in thunderstorms.

    Low: 23 °C

    Chance
    Showers then
    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 28. Northwest wind around 11 km/h.

    High: 28 °C

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 16. Calm wind.

    Low: 16 °C

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 27. Calm wind becoming southeast 5 to 8 km/h in the morning.

    High: 27 °C

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 18. Southwest wind 5 to 8 km/h.

    Low: 18 °C

    Partly Cloudy

Detailed Forecast

Today
Sunny and hot, with a high near 33. Heat index values as high as 37. Calm wind becoming south 5 to 10 km/h in the afternoon.
Tonight
Increasing clouds, with a low around 22. Southwest wind around 8 km/h.
Thursday
Showers and possibly a thunderstorm before 10am, then a chance of showers between 10am and 11am, then a chance of showers and thunderstorms after 11am. Patchy fog before 10am. High near 32. Heat index values as high as 36. Southwest wind around 11 km/h. Chance of precipitation is 80%. New rainfall amounts between 2.5 and 5 mm possible.
Thursday Night
A chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 11pm. Partly cloudy, with a low around 23. Southwest wind around 10 km/h. Chance of precipitation is 30%. New precipitation amounts between 1 and 2.5 mm, except higher amounts possible in thunderstorms.
Friday
Sunny, with a high near 28. Northwest wind around 11 km/h.
Friday Night
Mostly clear, with a low around 16. Calm wind.
Saturday
Mostly sunny, with a high near 27. Calm wind becoming southeast 5 to 8 km/h in the morning.
Saturday Night
Partly cloudy, with a low around 18. Southwest wind 5 to 8 km/h.
Sunday
A chance of showers. Partly sunny, with a high near 27. Southwest wind 5 to 10 km/h. Chance of precipitation is 40%.
Sunday Night
A chance of showers before 10pm. Partly cloudy, with a low around 17. Calm wind. Chance of precipitation is 30%.
Monday
Mostly sunny, with a high near 26. North wind 5 to 8 km/h becoming east in the afternoon.
Monday Night
Partly cloudy, with a low around 16. Calm wind.
Tuesday
Mostly sunny, with a high near 27. Calm wind becoming east 5 to 10 km/h in the morning.
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ABOUT THIS FORECAST

 
Point Forecast:
Merrimac MA
 42.84°N 70.99°W (Elev. 98 m)
6:50 am EDT Jul 16, 2025
8am EDT Jul 16, 2025-6pm EDT Jul 22, 2025
 
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