Threat For Severe Thunderstorms For The Mid Atlantic And Northeast; Hurricane Lane Continues Westward Across the Central Pacific

Showers and thunderstorms will impact the Mid Atlantic and Northeast U.S. on Tuesday. Some of the storms could produce damaging winds, large hail, and heavy rainfall. Localized flooding will be possible. The major I-95 cities from Washington D.C. to New York could be impacted. Major Hurricane Lane will turn northwest and could impact the Hawaiian Islands late week and into the weekend. Read More >

Hazardous Weather Conditions

Hazardous Weather Outlook

En Español

Current conditions at

Hyannis, Barnstable Municipal-Boardman Airport (KHYA)

Lat: 41.67°NLon: 70.27°WElev: 49ft.

Mostly Cloudy

68°F

20°C

Humidity	87%
Wind Speed	NE 7 mph
Barometer	30.10 in (1019.2 mb)
Dewpoint	64°F (18°C)
Visibility	10.00 mi
Last update	21 Aug 6:56 am EDT

More Information:

Local Forecast Office More Local Wx 3 Day History Mobile Weather Hourly Weather Forecast

Extended Forecast for

South Dennis MA

Today

Slight Chance
Showers then
Cloudy
High: 72 °F
Tonight

Patchy Fog
then Showers
Likely and
Patchy Fog
Low: 66 °F
Wednesday

Heavy Rain
and Patchy
Fog
High: 79 °F
Wednesday
Night

Slight Chance
T-storms and
Patchy Fog
then Partly
Cloudy
Low: 66 °F
Thursday

Mostly Sunny
High: 75 °F
Thursday
Night

Mostly Clear
Low: 64 °F
Friday

Sunny
High: 78 °F
Friday
Night

Clear
Low: 65 °F
Saturday

Sunny
High: 77 °F

Detailed Forecast

Today

A slight chance of showers before noon. Cloudy, with a high near 72. East wind 6 to 8 mph. Chance of precipitation is 20%.

Tonight

A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5am. Patchy fog. Otherwise, mostly cloudy, with a low around 66. Calm wind becoming south around 5 mph after midnight. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Wednesday

Showers likely and possibly a thunderstorm before 10am, then a chance of showers and thunderstorms, mainly between 10am and 5pm. Some of the storms could produce heavy rain. Patchy fog before 2pm. Otherwise, mostly cloudy, with a high near 79. Southwest wind 9 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

Wednesday Night

A slight chance of showers and thunderstorms before 9pm. Patchy fog between 8pm and 9pm. Otherwise, mostly cloudy, with a low around 66. Southwest wind around 9 mph becoming northwest after midnight. Chance of precipitation is 20%.

Thursday

Mostly sunny, with a high near 75. North wind around 9 mph.

Thursday Night

Mostly clear, with a low around 64.

Friday

Sunny, with a high near 78.

Friday Night

Clear, with a low around 65.

Saturday

Sunny, with a high near 77.

Saturday Night

Partly cloudy, with a low around 65.