Low pressure raced east from the Great Lakes bringing showers and isolated thunderstorms to Southern New England on the morning of Saturday the 30th. Several of the showers in Eastern Massachusetts contained locally heavy downpours, and one contained large hail. This brought several reports of flooding in Boston and the North Shore.

Flood in SUFFOLK, MASSACHUSETTS
From 30-SEP-17 07:49:00 to 30-SEP-17 11:00:00 (EST-5)
Location: CHELSEA
Flood cause: Heavy Rain
Property damage: 40.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At 749 AM EST in the Orient Heights section of Boston, multiple basements on Ashley and Bennington Streets were flooded and the backyards had 3 to 4 feet of water.

Flood in SUFFOLK, MASSACHUSETTS
From 30-SEP-17 07:48:00 to 30-SEP-17 11:00:00 (EST-5)
Location: REVERE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At 748 AM EST in Chelsea, the intersection of Stockton Street and Eastern Avenue was closed due to flooding.

Flood in NORFOLK, MASSACHUSETTS
From 30-SEP-17 09:30:00 to 30-SEP-17 12:30:00 (EST-5)
Location: MILTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At 930 AM EST in Milton, Lincoln Street at Brook Road was closed due to flooding.

Funnel Cloud in BARNSTABLE, MASSACHUSETTS
From 30-SEP-17 07:30:00 to 30-SEP-17 07:40:00 (EST-5)
Location: FALMOUTH HGTS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

At 730 AM EST in Falmouth, the Cape Cod Times reported two cold air funnel clouds over Falmouth Harbor.

Hail in ESSEX, MASSACHUSETTS
From 30-SEP-17 05:35:00 to 30-SEP-17 05:35:00 (EST-5)
Location: LYNN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At 535 AM EST, one-inch diameter hail was reported in Lynn.

Flash Flood in ESSEX, MASSACHUSETTS
From 30-SEP-17 05:24:00 to 30-SEP-17 10:00:00 (EST-5)
Location: EAST SAUGUS
Flood cause: Heavy Rain
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Amateur Radio

In Lynn at 530 AM EST, Boston Street was flooded and impassable at Stetson Street. A car was trapped in flood waters at the intersection of Boston and Bridge Streets. At 536 AM EST, a car was trapped in flood waters at Lynn Commons; people in the car needed to be rescued.  At 542 AM EST multiple cars were trapped in flood waters at the intersection of Boston Street and Cottage Street; the road was closed. Also multiple cars were trapped in flood waters at Washington and Johnson Streets. At 550 AM EST, Western Avenue, Liberty Street, and North Common Street were closed due to flooding. At 555 AM EST Alley Street was flooded and impassable. At 558 AM EST, a car was trapped in flooding on Commercial Street at Fenwick Street. At 649 AM EST, multiple cars were trapped in flood waters on Monroe, New Park, and Federal Streets as well as Western Avenue.  At 8 AM EST, Ainsworth Place at Boston Road experienced flooding into buildings.  An amateur radio operator in Lynn reported a storm total of 3.79 inches of rain.

Flood in ESSEX, MASSACHUSETTS
From 30-SEP-17 05:05:00 to 30-SEP-17 09:05:00 (EST-5)
Location: CARLETONVILLE
Flood cause: Heavy Rain
Property damage: 4.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At 505 AM EST, an amateur radio operator reported cars trapped in flood waters on Pope Street in Salem.  At 515 AM EST, Pope Street was officially closed due to flooding.

Flood in SUFFOLK, MASSACHUSETTS
From 30-SEP-17 07:20:00 to 30-SEP-17 11:00:00 (EST-5)
Location: REVERE
Flood cause: Heavy Rain
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At 720 AM EST in Revere, a car was trapped in one foot of flooding on State Route 1A near the East Boston line.  At 742 AM EST, amateur radio reported a flooded basement on Curtis Road. At 747 AM EST, three cars were reported trapped in flood waters on the Revere Beach Parkway.

Flood in NORFOLK, MASSACHUSETTS
From 30-SEP-17 09:15:00 to 30-SEP-17 13:00:00 (EST-5)
Location: WOLLASTON
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At 915 AM EST, the Wollaston MBTA (Rapid Transit) Station in Quincy was flooded. At 920 AM EST, the intersection of Centre Street and Vernon Street was flooded and impassable. At 925 AM EST, Cedar Street was flooded and impassable. The Automated Surface Observation System platform in Milton reported a storm total rainfall of 2.44 inches.

Flood in SUFFOLK, MASSACHUSETTS
From 30-SEP-17 07:01:00 to 30-SEP-17 10:00:00 (EST-5)
Location: WINTHROP
Flood cause: Heavy Rain
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At 701 AM EST in Winthrop, an apartment basement was flooding on Putnam Street. At 712 AM EST, a car was trapped in flood waters on Crest Avenue. At 720 AM EST a portion of Walden Street and adjacent parking lot were flooded and impassable.  At 735 AM EST, Governors Drive was flooded. At 750 AM EST, a basement was flooded on Bank Street. At 820 AM EST, basement flooding was also reported on Veterans Road. An amateur radio operator reported a storm total rainfall of 2.58 inches in Winthrop.