Flash flood watch issued for Boston and South Shore communities

Boston, Quincy, Brockton, and other South Shore communities are under a flood watch until 9 a.m., according to the National Weather Service. 

Rhode Island, eastern Massachusetts, and parts of northern Connecticut are under a flash flood advisory until 4 p.m., the agency’s Boston/Norton branch shared in a weather alert around 2 a.m.

At 6 a.m., the “Doppler radar indicated thunderstorms producing heavy rain across the warned area.”

The morning commute will reportedly have the heaviest rain with most areas seeing 1 to 2 inches of rainfall in one hour, but up to 4 inches in some areas.

South central and southeastern counties were under a flash flood watch from 2 p.m yesterday, to 2 a.m. this morning. 

Check out what local meteorologists are saying: 

National Weather Service: ‘Heaviest rain will be this morning with 2-4 inches possible’

A Flood Watch is in effect through 4pm Today. Heaviest rain will be this morning with 2-4 inches possible. #MAWX #RIWX #CTWX pic.twitter.com/D4jKMYu6qo

— NWS Boston (@NWSBoston) July 10, 2025

Flash Flood Warning including Brockton MA, Quincy MA and Randolph MA until 9:00 AM EDT pic.twitter.com/6N6NBjWGIG

— NWS Boston (@NWSBoston) July 10, 2025

Cindy Fitzgibbon, WCVB: ‘Avoid flooded roads as you never know how deep the water is’

THURSDAY AM weather update…
Flash Flooding this morning just south of Boston from heavy rain. Up to 2-4” rain expected in some areas. Avoid flooded roads as you never know how deep the water is. Dries out this afternoon #WCVB pic.twitter.com/XNYyTIIoQ7

— Cindy Fitzgibbon (@Met_CindyFitz) July 10, 2025

FLASH FLOOD WARNING…
Until 9am for downpours with 1-2″‘hr rainfall rates that are causing flooding especially in poor drainage areas. Don’t drive over flooded roads as you can’t tell how deep the water is. Find an alternate route #WCVB pic.twitter.com/yeuJTgRlFg

— Cindy Fitzgibbon (@Met_CindyFitz) July 10, 2025

Chris Lambert, 7News: ‘2.5-4.0” since last night south of Boston’

Flood watch up, pockets of tropical downpours this morning producing a lot of rain in a short amount of time. pic.twitter.com/go1CrA30aH

— Chris Lambert (@clamberton7) July 10, 2025

2.5-4.0” since last night south of Boston. Much of it falling in last couple hours. Ongoing poor drainage/street flooding in parts of these areas. pic.twitter.com/EYldvoAk9q

— Chris Lambert (@clamberton7) July 10, 2025