A complex weather system brought precipitation to the mid-Atlantic on March 12. Strengthening low pressure tracked from the Southeast US to just off the mid-Atlantic coast, and began to rapidly intensify as it departed towards New England. Unseasonably warm air ahead of the system and its close proximity to the coast caused precipitation to start as rain. However, as the low deepened and as winds shifted to a northwest direction, colder air began to invade, and rain gradually changed to snow from west to east. In some areas, precipitation remained steady to heavy for a few hours after the changeover, allowing several inches of snow to accumulate. Dropping temperatures also led to instances of flash freezing. With the storm rapidly deepening as it moved by and away from the area, winds also increased, exacerbating impacts caused by the wet snow and leading to scattered power outages. More tranquil conditions returned to the region by March 13.

Winter Storm in LEHIGH, PENNSYLVANIA
From 12-MAR-22 08:00:00 to 12-MAR-22 16:45:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Around 4 to 6 inches of snow fell after the transition from rain. A trained spotter in Center Valley reported 5.8 inches of snow.

Winter Weather in LOWER BUCKS, PENNSYLVANIA
From 12-MAR-22 08:45:00 to 12-MAR-22 17:15:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Around 1 to 3 inches of snow fell following a transition from rain. A trained spotter in Furlong reported 2.5 inches of snow.

Winter Storm in UPPER BUCKS, PENNSYLVANIA
From 12-MAR-22 08:30:00 to 12-MAR-22 17:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Around 3 to 5 inches of snow fell after the transition from rain, with additional impacts due to strong winds and flash freezing as state officials reported numerous car accidents. A maximum snow report of 5.0 inches was received from a trained spotter in East Rockhill Twp.

Winter Storm in WESTERN MONTGOMERY, PENNSYLVANIA
From 12-MAR-22 08:30:00 to 12-MAR-22 17:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Around 4 to 5 inches of snow fell following a transition from rain. Strong winds and falling temperatures also led to several reported power outages and car accidents. A trained spotter in Trappe reported 5.2 inches of snow.

Winter Weather in EASTERN MONTGOMERY, PENNSYLVANIA
From 12-MAR-22 08:45:00 to 12-MAR-22 17:15:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Around 2 to 3 inches of snow fell following a transition from rain. A trained spotter in King of Prussia reported 3.2 inches of snow.

Winter Weather in WESTERN CHESTER, PENNSYLVANIA
From 12-MAR-22 08:30:00 to 12-MAR-22 17:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Around 3 to 4 inches of snow fell following a transition from rain. A trained spotter in East Nantmeal Twp reported 4.3 inches of snow.

Winter Weather in EASTERN CHESTER, PENNSYLVANIA
From 12-MAR-22 08:45:00 to 12-MAR-22 17:15:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Around 2 to 3 inches of snow fell following a transition from rain. A report of 2.8 inches of snow was received from Jennersville.

Winter Storm in BERKS, PENNSYLVANIA
From 12-MAR-22 08:00:00 to 12-MAR-22 16:30:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Around 3 to 5 inches of snow fell after the transition from rain, with additional impacts due to strong winds and flash freezing as state officials reported numerous car accidents. A maximum snow report of 5.5 inches was received from a trained spotter in Bern Twp.

Winter Storm in NORTHAMPTON, PENNSYLVANIA
From 12-MAR-22 08:00:00 to 12-MAR-22 16:45:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Around 4 to 7 inches of snow fell after the transition from rain. A trained spotter in Bangor reported 7.0 inches of snow.

Winter Weather in DELAWARE, PENNSYLVANIA
From 12-MAR-22 09:30:00 to 12-MAR-22 17:30:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Around 1 to 2 inches of snow fell following a transition from rain. A trained spotter in Chadds Ford reported 2.2 inches of snow.

Winter Storm in MONROE, PENNSYLVANIA
From 12-MAR-22 06:30:00 to 12-MAR-22 19:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Around 4 to 7 inches of snow fell after the transition from rain. A report of 9.0 inches of snow was received from Pocono Pines, but this is believed to be too high. Otherwise, reports of 6.0 inches were received in Blakeslee and Tobyhanna.

Winter Storm in CARBON, PENNSYLVANIA
From 12-MAR-22 06:30:00 to 12-MAR-22 19:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Around 4 to 6 inches of snow fell after the transition from rain. A report of 5.8 inches of snow was received from Hudsondale.