The third widespread major winter storm of the month of February affected most of Eastern Pennsylvania from the early morning of the 25th into the middle of the day on the 26th. In the Poconos, snowfall averaged 12 to 24 inches. In the Lehigh Valley, snowfall averaged around one foot and in southeastern Pennsylvania including Philadelphia 6 to 12 inches. The lightest snowfall occurred in Berks County. Snow began falling before dawn on the 25th. In and around Philadelphia, precipitation initially started as rain before changing to snow by 7 a.m. EST. Except for the Poconos and parts of the Lehigh Valley, the snow that fell during the day on the 25th had a hard time accumulating on roadways that mainly stayed wet. Once the sun set, both the snowfall intensity and wind increased. But unlike the previous winter storm, the wind increased first and then the snow became heavier. Thus less power outages occurred. The snow fell heavy at times overnight on the 25th and decreased in intensity during the day on the 26th. The snow ended around Noon EST, except lingered into the afternoon in the Poconos. The strongest winds occurred from 6 p.m. EST on the 25th and 6 a.m. EST on the 26th.
Schools were closed on the 25th in Philadelphia. Most schools in Eastern Pennsylvania were closed on the 26th. Municipal meetings were canceled as were sports games. Hundreds of flights were canceled going in and out of Philadelphia International Airport. Snow drifts forced the closure of Pennsylvania State Route 10 in Chester County. Because the winds increased before the heavier snow, PECO Energy reported less than 1,000 of its customers lost power in Southeastern Pennsylvania. Only a few trees were knocked down.
Representative snowfall included 20.5 inches in Mount Pocono (Monroe County), 15.3 inches in Martins Creek (Northampton County), 12.4 inches at the Lehigh Valley International Airport, 12.0 inches in Nazareth (Northampton County), 11.7 inches in Perkasie (Bucks County), 11.2 inches in East Stroudsburg (Monroe County), 10.5 inches in Glendon (Northampton County), 10.3 inches in Lehighton (Carbon County), 10.1 inches in Exton (Chester County), 10.0 inches in Royersford (Montgomery County), 9.4 inches in Jim Thorpe (Carbon County), 8.0 inches in Sellersville (Bucks County), Pottstown (Montgomery County) and Downingtown (Chester County), 7.5 inches in Clifton Heights (Delaware County), 7.1 inches in Rockledge (Philadelphia County), 6.6 inches in Drexel Hill (Delaware County), 6.0 inches in Wynnewood (Montgomery County), 5.6 inches at the Philadelphia International Airport, 3.9 inches in Fleetwood (Berks County) and 2.2 inches in West Lawn (Berks County).
Peak wind gusts included 48 mph at the Philadelphia International Airport and Coatesville (Chester County), 43 mph at Northeast Philadelphia Airport, 40 mph in Pottstown (Montgomery County) and at the Lehigh Valley International Airport, 39 mph in Doylestown (Bucks County) and 38 mph in Reading (Berks County).
This last winter storm concluded a record breaking and unprecedented month for snow in February across Eastern Pennsylvania, especially in Philadelphia. At the Philadelphia International Airport, the 51.5 inches of snow that fell in February 2010 surpassed the previous snowiest February by 20 inches and was the snowiest month on record. The 51.5 inches of snow that fell In February alone would qualify it as the 5th snowiest winter on record. In all, 78.7 inches of snow fell this season in Philadelphia and was the snowiest season on record. The previous record was 65.5 inches set in 1995-6. At the Lehigh Valley International Airport, the 42.9 inches of snow that fell during February 2010 was the snowiest February on record, but the second snowiest month on record, barely surpassed by January 1925 (43.2 inches). The seasonal snowfall total of 59.8 inches was the 6th snowiest season on record.
The winter storm was caused by a low pressure system that formed east of Florida on the 24th. At 7 a.m. EST on the 25th, it (992 millibar low pressure system) was well east of the North Carolina coast and was intensifying rapidly as it was moving north. At 1 p.m. EST on the 25th, it was a 987 millibar low well east of the Delmarva Peninsula. At 7 p.m. EST on the 25th, it was a 978 millibar low just east of Long Island. At 10 p.m. EST on the 25th, it deepened to 972 millibars and was located along the Rhode Island and Massachusetts border. From there, a rare occurrence happened as the low pressure system retrograded or move westward. At 1 a.m. EST on the 26th, the 972 millibar low was in Connecticut; at 7 a.m. EST it weakened to 979 millibars and was over New York City. It spent the rest of the daylight hours weakening over the New York City area and then drifted slowly north that night. The heaviest snow across a widespread area occurred during the retrogression process, but the intensity of the snow decreased once the low pressure system weakened.

Winter Storm in PHILADELPHIA, PENNSYLVANIA
From 25-FEB-10 06:00:00 to 26-FEB-10 13:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Storm in DELAWARE, PENNSYLVANIA
From 25-FEB-10 05:00:00 to 26-FEB-10 13:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in BERKS, PENNSYLVANIA
From 25-FEB-10 03:30:00 to 26-FEB-10 10:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Storm in MONTGOMERY, PENNSYLVANIA
From 25-FEB-10 03:00:00 to 26-FEB-10 12:30:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Storm in CHESTER, PENNSYLVANIA
From 25-FEB-10 02:00:00 to 26-FEB-10 12:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Storm in BUCKS, PENNSYLVANIA
From 25-FEB-10 03:00:00 to 26-FEB-10 12:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Storm in LEHIGH, PENNSYLVANIA
From 25-FEB-10 02:00:00 to 26-FEB-10 12:30:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Storm in NORTHAMPTON, PENNSYLVANIA
From 25-FEB-10 02:00:00 to 26-FEB-10 12:30:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Storm in CARBON, PENNSYLVANIA
From 25-FEB-10 02:00:00 to 26-FEB-10 16:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Storm in MONROE, PENNSYLVANIA
From 25-FEB-10 02:00:00 to 26-FEB-10 16:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter