Severe Thunderstorms in the Ohio and Tennessee Valleys; Flash Flooding Possible in the Southwest

Scattered damaging winds, isolated severe hail, and a brief tornado or two are possible from the Upper Ohio to Tennessee Valleys during the late afternoon and evening. Across the Southwest, monsoonal moisture will continue to bring heavy rain and a threat for isolated to scattered flash flooding through Saturday. Read More >

Hazardous Weather Conditions

Severe Thunderstorm Watch in effect from September 6, 01:10 PM EDT until September 6, 08:00 PM EDT

Current conditions at

Lawrence Municipal Airport (KLWM)

Lat: 42.71°NLon: 71.13°WElev: 135ft.

Partly Cloudy

85°F

29°C

Humidity	59%
Wind Speed	S 14 G 29 mph
Barometer	29.90 in (1012.3 mb)
Dewpoint	69°F (21°C)
Visibility	10.00 mi
Heat Index	89°F (32°C)
Last update	6 Sep 1:54 pm EDT

More Information:

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

Extended Forecast for

Merrimac MA

Severe T-storm Watch until September 6, 08:00pm

Click here for hazard details and duration

Severe T-storm Watch

Severe T-storm Watch until September 6, 08:00pm
NOW until 8:00pm Sat
Severe T-storm Watch
This Afternoon
High: 87 °F
Severe
Thunderstorms
Tonight
Low: 58 °F
Severe
Thunderstorms
then Showers
Likely
Sunday
High: 67 °F
Showers and
Patchy Fog
then Chance
Showers and
Patchy Fog
Sunday Night
Low: 50 °F
Slight Chance
Showers then
Mostly Clear
Monday
High: 74 °F
Sunny
Monday Night
Low: 49 °F
Mostly Clear
Tuesday
High: 71 °F
Sunny
Tuesday Night
Low: 50 °F
Partly Cloudy

Detailed Forecast

This Afternoon

Scattered showers and thunderstorms, mainly after 3pm. Some of the storms could be severe. Partly sunny, with a high near 87. South wind around 13 mph, with gusts as high as 25 mph. Chance of precipitation is 40%. New rainfall amounts between a quarter and half of an inch possible.

Tonight

Showers and thunderstorms before 5am, then showers likely. Some of the storms could be severe. Low around 58. West wind around 6 mph becoming calm in the evening. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.

Sunday

Showers and possibly a thunderstorm before noon, then a chance of showers. Patchy fog before 3pm. High near 67. North wind around 5 mph becoming light and variable. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

Sunday Night

A slight chance of showers before 9pm. Partly cloudy, with a low around 50. Calm wind becoming west around 5 mph after midnight. Chance of precipitation is 20%.

Monday

Sunny, with a high near 74. West wind around 6 mph.

Monday Night

Mostly clear, with a low around 49. Calm wind.

Tuesday

Sunny, with a high near 71. Light and variable wind becoming east around 6 mph in the morning.

Tuesday Night

Partly cloudy, with a low around 50. Calm wind.

Wednesday

Partly sunny, with a high near 70. Light and variable wind becoming east around 6 mph in the morning.

Wednesday Night

Partly cloudy, with a low around 51. Calm wind.