National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Summer Heat Continues; Severe Weather For Northeast

A large ridge of high pressure continues to bring summer heat and humidity to several sections of the country. Excessive heat warnings and heat advisories are in effect across the Desert Southwest, southern Plains, Lower Mississippi Valley and a small part of the Mid-Atlantic. Meanwhile, severe thunderstorms are forecast for the Northeast and northern Mid-Atlantic today. Read More >

Hazardous Weather Conditions

Current conditions at

Boston, Logan International Airport (KBOS)

Lat: 42.36°NLon: 71.01°WElev: 20ft.

Light Rain

78°F

26°C

Humidity 82%
Wind Speed S 12 mph
Barometer 29.86 in (1011.2 mb)
Dewpoint 72°F (22°C)
Visibility 5.00 mi
Heat Index80°F (27°C)
Last update 21 Aug 4:54 pm EDT
Extended Forecast for

Somerville MA

Severe T-storm Watch until August 21, 09:00pm
Click here for hazard details and duration
Severe T-storm Watch
  •  
    Severe T-storm Watch until August 21, 09:00pm

    NOW until
    9:00pm Wed

    Severe T-storm Watch

  • This
    Afternoon

    This Afternoon: A chance of showers and thunderstorms. Some storms could be severe, with large hail, damaging winds, and heavy rain. Mostly cloudy, with a high near 86. South wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Severe
    Thunderstorms

    High: 86 °F

  • Tonight

    Tonight: A chance of showers and thunderstorms, mainly before midnight. Some storms could be severe, with large hail, damaging winds, and heavy rain. Mostly cloudy, with a low around 72. Southwest wind 7 to 9 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Severe
    Thunderstorms

    Low: 72 °F

  • Thursday

    Thursday: A slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 93. Southwest wind 6 to 10 mph. Chance of precipitation is 20%.

    Partly Sunny
    then Slight
    Chance
    T-storms

    High: 93 °F

  • Thursday
    Night

    Thursday Night: A slight chance of showers and thunderstorms, then a chance of showers after 8pm. Mostly cloudy, with a low around 66. West wind 5 to 8 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Chance
    Showers

    Low: 66 °F

  • Friday

    Friday: A slight chance of showers before 10am. Mostly sunny, with a high near 78. Northwest wind 6 to 8 mph. Chance of precipitation is 20%.

    Slight Chance
    Showers then
    Mostly Sunny

    High: 78 °F

  • Friday
    Night

    Friday Night: Mostly clear, with a low around 59. Northwest wind around 6 mph.

    Mostly Clear

    Low: 59 °F

  • Saturday

    Saturday: Sunny, with a high near 75. Northwest wind around 7 mph becoming northeast in the afternoon.

    Sunny

    High: 75 °F

  • Saturday
    Night

    Saturday Night: Partly cloudy, with a low around 59. East wind around 5 mph becoming north after midnight.

    Partly Cloudy

    Low: 59 °F

Detailed Forecast

This Afternoon
A chance of showers and thunderstorms. Some storms could be severe, with large hail, damaging winds, and heavy rain. Mostly cloudy, with a high near 86. South wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
A chance of showers and thunderstorms, mainly before midnight. Some storms could be severe, with large hail, damaging winds, and heavy rain. Mostly cloudy, with a low around 72. Southwest wind 7 to 9 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday
A slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 93. Southwest wind 6 to 10 mph. Chance of precipitation is 20%.
Thursday Night
A slight chance of showers and thunderstorms, then a chance of showers after 8pm. Mostly cloudy, with a low around 66. West wind 5 to 8 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday
A slight chance of showers before 10am. Mostly sunny, with a high near 78. Northwest wind 6 to 8 mph. Chance of precipitation is 20%.
Friday Night
Mostly clear, with a low around 59. Northwest wind around 6 mph.
Saturday
Sunny, with a high near 75. Northwest wind around 7 mph becoming northeast in the afternoon.
Saturday Night
Partly cloudy, with a low around 59. East wind around 5 mph becoming north after midnight.
Sunday
Mostly sunny, with a high near 71. East wind 7 to 10 mph.
Sunday Night
Partly cloudy, with a low around 60. Northeast wind 5 to 7 mph.
Monday
Mostly sunny, with a high near 71. East wind 7 to 9 mph.
Monday Night
Partly cloudy, with a low around 61. East wind 5 to 7 mph.
Tuesday
Partly sunny, with a high near 74. Northeast wind 6 to 8 mph becoming southeast in the afternoon.
Tuesday Night
Mostly cloudy, with a low around 64. South wind 5 to 7 mph.
Wednesday
A chance of showers. Partly sunny, with a high near 78.
Click Map For Forecast
Disclaimer
Map Legend
Point Forecast:
Somerville MA
 42.39°N 71.09°W (Elev. 46 ft)
Last Update:
2:42 pm EDT Aug 21, 2019
Forecast Valid:
5pm EDT Aug 21, 2019-6pm EDT Aug 28, 2019
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation