Dangerous Heat Wave from the Midwest to East Coast; Severe Thunderstorms Across Portions of the Upper Midwest

A dangerous heat wave will persist through this weekend. Widespread warnings and advisories for the heat cover most of the eastern two-thirds of the U.S. Heat indices will surge past 100 degrees and even rise above 110 in many locations. Northwest of this dome of heat, severe thunderstorms with the possibility of strong tornadoes and widespread significant wind damage are possible into tonight. Read More >

Current conditions at

Hyannis, Barnstable Municipal-Boardman Airport (KHYA)

Lat: 41.67°NLon: 70.27°WElev: 49ft.

Partly Cloudy

74°F

23°C

Humidity 85%
Wind Speed SW 17 mph
Barometer 29.80 in (1009.2 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Last update 19 Jul 6:56 pm EDT
Extended Forecast for

Hyannis MA

Heat Advisory until July 21, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory until July 21, 08:00pm

    NOW until
    8:00pm Sun

    Heat Advisory

  • Tonight

    Tonight: Patchy fog after midnight.  Otherwise, mostly cloudy, with a low around 75. Southwest wind 9 to 14 mph.

    Mostly Cloudy
    then Patchy
    Fog

    Low: 75 °F

  • Saturday

    Saturday: Sunny, with a high near 91. West wind 8 to 11 mph.

    Sunny

    High: 91 °F

  • Saturday
    Night

    Saturday Night: Mostly clear, with a low around 77. Southwest wind 8 to 11 mph.

    Mostly Clear

    Low: 77 °F

  • Sunday

    Sunday: A slight chance of showers and thunderstorms after 3pm.  Mostly sunny, with a high near 94. Heat index values as high as 107. Southwest wind 9 to 13 mph.  Chance of precipitation is 20%.

    Mostly Sunny
    then Slight
    Chance
    T-storms

    High: 94 °F

  • Sunday
    Night

    Sunday Night: A chance of showers and thunderstorms, mainly before 1am.  Mostly cloudy, with a low around 74. Southwest wind 5 to 9 mph becoming northwest after midnight.  Chance of precipitation is 40%.

    Chance
    T-storms

    Low: 74 °F

  • Monday

    Monday: Showers and thunderstorms likely, mainly after 10am.  Mostly cloudy, with a high near 81. North wind around 7 mph becoming east in the afternoon.  Chance of precipitation is 70%.

    T-storms
    Likely

    High: 81 °F

  • Monday
    Night

    Monday Night: Showers and thunderstorms likely before 2am, then showers likely and possibly a thunderstorm after 2am.  Mostly cloudy, with a low around 69. South wind around 6 mph becoming southwest after midnight.  Chance of precipitation is 70%.

    T-storms
    Likely

    Low: 69 °F

  • Tuesday

    Tuesday: A chance of showers and thunderstorms.  Mostly cloudy, with a high near 78. Northwest wind around 9 mph.  Chance of precipitation is 50%.

    Chance
    T-storms then
    Chance
    Showers

    High: 78 °F

Detailed Forecast

Tonight
Patchy fog after midnight. Otherwise, mostly cloudy, with a low around 75. Southwest wind 9 to 14 mph.
Saturday
Sunny, with a high near 91. West wind 8 to 11 mph.
Saturday Night
Mostly clear, with a low around 77. Southwest wind 8 to 11 mph.
Sunday
A slight chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 94. Heat index values as high as 107. Southwest wind 9 to 13 mph. Chance of precipitation is 20%.
Sunday Night
A chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 74. Southwest wind 5 to 9 mph becoming northwest after midnight. Chance of precipitation is 40%.
Monday
Showers and thunderstorms likely, mainly after 10am. Mostly cloudy, with a high near 81. North wind around 7 mph becoming east in the afternoon. Chance of precipitation is 70%.
Monday Night
Showers and thunderstorms likely before 2am, then showers likely and possibly a thunderstorm after 2am. Mostly cloudy, with a low around 69. South wind around 6 mph becoming southwest after midnight. Chance of precipitation is 70%.
Tuesday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 78. Northwest wind around 9 mph. Chance of precipitation is 50%.
Tuesday Night
A chance of showers before 9pm. Mostly cloudy, with a low around 66. Southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.
Wednesday
Partly sunny, with a high near 78. North wind around 6 mph becoming south in the afternoon.
Wednesday Night
Partly cloudy, with a low around 67. South wind around 6 mph becoming west after midnight.
Thursday
Mostly sunny, with a high near 79. Northwest wind around 7 mph becoming south in the afternoon.
Thursday Night
Partly cloudy, with a low around 69. South wind 6 to 8 mph.
Friday
Sunny, with a high near 80. West wind around 7 mph becoming southwest in the afternoon.
Click Map For Forecast
Point Forecast:
Hyannis MA
 41.66°N 70.29°W (Elev. 39 ft)
4:06 pm EDT Jul 19, 2019
7pm EDT Jul 19, 2019-6pm EDT Jul 26, 2019
 
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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