Low pressure developed over the Ohio Valley and Middle Atlantic on Sunday, January 31, 2021. The low then consolidated along the Middle Atlantic coast early on Monday, February 1, 2021 and intensified as it slowly tracked to the north-northeast. The low meandered slowly north as it moved along the northeast and New England coast later on Monday February 1, 2021 through Wednesday, February 3, 2021. The low brought a major winter storm to northeast New Jersey, with the most significant impacts occurring on Monday, February 1, 2021. 3 to 6 inches of snow had already accumulated by the start of the morning commute across southwest Connecticut. Near blizzard conditions then occurred late morning into the early evening with snowfall rates of 1 to 3 inches per hour. Strong winds combined with these heavy snow rates to produce visibilities one quarter mile or less at times.  Lighter snow bands then lingered intermittently through the early morning hours on February 3, 2021. Snowfall totals ranged from 8 to as high as 19 inches. Winds gusted 40 to 55 mph at times on Monday, February 1, 2021, which caused power outages. Travel was also severely impacted with snow covered roads. COVID testing and vaccination sites were closed. Impacts were limited on February 2, 2021 and February 3, 2021 as the snow was largely light.

Winter Storm in NORTHERN FAIRFIELD, CONNECTICUT
From 01-FEB-21 00:00:00 to 03-FEB-21 08:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotters, amateur radio, and the public reported 13 to 19 inches of snow. Amateur radio reported 19.0 inches of snow in Danbury and a trained spotter reported 19.0 inches of snow 4 miles south-southeast of Sherman. The nearby Bridgeport Airport ASOS measured a 47 mph wind gust at 5:52 pm on February 1, 2021.

Winter Storm in SOUTHERN FAIRFIELD, CONNECTICUT
From 01-FEB-21 00:00:00 to 03-FEB-21 01:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

The Official NWS Observation at Bridgeport was 15.8 inches of snow. The Bridgeport Airport ASOS measured a 47 mph wind gust at 5:52 pm on February 1, 2021.

Winter Storm in NORTHERN NEW HAVEN, CONNECTICUT
From 01-FEB-21 00:00:00 to 03-FEB-21 09:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotters reported 16.2 inches of snow in North Haven and 14.0 inches on Waterbury. The Waterbury Airport AWOS measure a 47 mph wind gust at 7:51 pm on February 1, 2021.

Winter Storm in SOUTHERN NEW HAVEN, CONNECTICUT
From 01-FEB-21 00:00:00 to 03-FEB-21 01:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotters in East Haven and West Haven reported 15.0 and 11.0 inches of snow respectively. The New Haven Airport ASOS measured a 43 mph wind gust at 3:53 pm on February 1, 2021.

Winter Storm in NORTHERN MIDDLESEX, CONNECTICUT
From 01-FEB-21 00:00:00 to 03-FEB-21 09:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained Spotters and the public reported 10 to 15 inches of snow. The nearby Groton Airport ASOS measured a 51 mph wind gust at 7:56 pm on February 1, 2021.

Winter Storm in SOUTHERN MIDDLESEX, CONNECTICUT
From 01-FEB-21 00:00:00 to 03-FEB-21 02:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained Spotters and the public reported 10 to 13 inches of snow. The nearby Groton Airport ASOS measured a 51 mph wind gust at 7:56 pm on February 1, 2021.

Winter Storm in NORTHERN NEW LONDON, CONNECTICUT
From 01-FEB-21 00:00:00 to 03-FEB-21 02:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

A COOP Observer 1 miles south-southeast of Norwich reported 8.0 inches of snow. Trained spotters and the public reported 8 to 10 inches of snow. The nearby Groton Airport ASOS measured a 51 mph wind gust at 7:56 pm on February 1, 2021.

Winter Storm in SOUTHERN NEW LONDON, CONNECTICUT
From 01-FEB-21 00:00:00 to 03-FEB-21 00:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

The public reported 9.2 inches of snow in New London. The Groton Airport ASOS measured a 51 mph wind gust at 7:56 pm on February 1, 2021.