An area of strong low pressure developed off the Mid Atlantic Coast early on February 25th.  This low deepened considerably and moved slowly up the East Coast on the 25th and 26th.  A trough stretching northwest from this low lingered over the Upper Ohio Valley from February 25th into the 27th.  Cold north to northwest winds blowing across Lake Erie in association with the trough caused lake effect snow showers to develop and intensify on the 25th.  Periods of moderate to heavy snow then affected portions of northwestern Pennsylvania through the afternoon hours of the 26th.  The snow finally diminished during the evening hours of 26th.  Snowfall totals over portions of Northwest Pennsylvania exceeded 15 inches on the 25th and 26th.  Northwest winds gusted to more than 25 mph on both the 25th and 26th.  Peak gusts of around 30 mph occurred during the early morning hours of the 26th.  The wind and snow combined to create near blizzard conditions at times with visibilities less than one quarter mile.   Drifts up to three feet deep were reported at a few locations.  Some light freezing rain and drizzle also mixed with the snow at times during the afternoon and evening hours of the 26th.  A slight coating of ice was reported at a few locations.  This storm made travel very difficult and many accidents were reported.

Winter Storm in SOUTHERN ERIE, PENNSYLVANIA
From 25-FEB-10 08:00:00 to 26-FEB-10 22:00:00 (EST-5)
Property damage: 300.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snow showers developed in Erie County during the morning hours of February 25th and quickly intensified.  A period of moderate to heavy snow occurred from late morning into the early afternoon hours.  The snow showers then diminished with mainly light snow reported during the second half of the afternoon and most of the evening.  The snow showers began to increase in intensity again just after midnight on the 26th with periods of moderate to heavy snow then occurring into the afternoon.  Snowfall rates at times exceeded an inch per hour.  Areas of light freezing rain and drizzle mixed with the snow showers during the afternoon of the 26th.  A slight glazing of ice was reported at a few locations.  More light snow fell late in the afternoon and during the evening of the 26th.  The snow showers finally tapered to flurries late in the evening.  In addition, northwest winds gusted to more than 25 mph on both the 25th and 26th.  Peak gusts of around 30 mph occurred during the early morning hours of the 26th.  The wind and snow combined to create near blizzard conditions at times with visibilities less than one quarter mile.  Snow totals across inland Erie County during this event ranged from 8 to 10 inches just south of Interstate 90 to more 20 inches at a few locations.  Snowfall totals from the 25th and 26th received from snowfall spotters included: 25 inches at Franklin Center; 24.0 inches at Pont; 22.0 inches southwest of North East; 19.0 inches at Edinboro and 14.3 inches in Amity Township.  Drifts up to three feet deep were reported at a few locations.  This storm made travel very difficult and many accidents were reported.

Winter Storm in CRAWFORD, PENNSYLVANIA
From 25-FEB-10 08:00:00 to 26-FEB-10 22:00:00 (EST-5)
Property damage: 200.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snow showers developed in Crawford County during the morning hours of February 25th and quickly intensified.  A period of moderate to heavy snow occurred from late morning into the early afternoon hours.  The snow showers then diminished with mainly light snow reported during the second half of the afternoon and most of the evening.  The snow showers began to increase in intensity again just after midnight on the 26th with periods of moderate to heavy snow then occurring into early afternoon.  Snowfall rates at times exceeded an inch per hour.  Lighter snow fell late in the afternoon and during the evening of the 26th.  The snow showers finally tapered to flurries late in the evening.  In addition, northwest winds gusted to more than 25 mph on both the 25th and 26th.  Peak gusts of around 30 mph occurred during the early morning hours of the 26th.  The wind and snow combined to create  near blizzard conditions at times with visibilities less than one quarter mile.  Snow totals across Crawford County during this event ranged from 6 inches in the southeast corner of the county to more than a foot along the northern border.   Snowfall totals from the 25th and 26th received from snowfall spotters included: 15.5 inches near Crossingville; 14.0 inches at Conneautville; 12.6 inches at Linesville and 10.0 inches at Meadville.  This storm made travel very difficult and many accidents were reported.