The Blizzard of '96, which was a blockbuster snowstorm, and arctic cold hammered the Northeast U.S. early in January of 1996, before the pattern changed abruptly with deadly consequences.
A massive January thaw, snowmelt and a quick-hitting, intense rainstorm led to extreme flooding across the region during the middle of January.
According to the National Oceanic and Atmospheric Administration, flooding in January 1996 claimed 33 lives.
Compared to Normal
at Williamsburg, Pa.
at Dixon, Pa.
"There was 2-3 feet of snow on the ground in Pennsylvania," AccuWeather Expert Senior Meteorologist Dave Dombek said. "A big warm-up followed and then at the end of the week a big rainstorm came. It looked like a given that things were going to get bad. I've never seen snow disappear so fast."
The flood swollen Monongahela River, right, joins the cresting Allegheny River, left, to form the Ohio River at Pittsburgh Saturday, Jan. 20, 1996. The Allegheny crested at mid-day at 34.6 feet, the highest level since 1972. (AP Photo/Gene J. Puskar)
Setting the Stage
Three snowstorms, including the Blizzard of '96, left deep snowpack across portions of the Northeast during the first half of the month. According to NOAA, snow depths of 2-3 feet were common from central Pennsylvania into New York.
Philadelphia, the hardest-hit city from the Blizzard of '96, received its biggest snow ever from one storm, nearly 31 inches. For the entire month of January, Philadelphia's total snowfall was 34 inches, more than five times the normal monthly snowfall of 6.5 inches.
Compared to Normal
January Thaw, Massive Snowmelt
Following all of the snow, it was like a switch was flipped with the weather pattern. Record-challenging warmth spread into the East during the second half of the month.
Temperatures were below normal in Philadelphia through Jan. 16, 1996, before the significant warming took place. Temperatures went from as much as 20 degrees below normal during the first part of the month to as much as 22 degrees above normal during the second half of the month.
Highs climbed into the 50s and 60s across much of the Northeast. In Philadelphia, highs on Jan. 18 and Jan. 19, 1996, soared to 58 degrees F and 62 degrees F, respectively.
Moisture in the air and wind blowing contributed to even faster snowmelt.
"Snowcover will melt fast when the humidity is high and the wind is blowing," AccuWeather Expert Senior Meteorologist Henry Margusity said. "Light winds and low humidity will allow evaporational cooling to occur millimeters above the snow cover, which creates a cold blanket above the snow. When the wind blows and the humidity is high, that cold blanket of air is removed allowing the higher-humidity air to melt the snow."
The high snowpack generally melted over the course of 18-30 hours.
Ice jam flooding was a problem along many area rivers and streams, since they were icy before the rapid thaw hit.
This is an aerial view of flooded houses and businesses in West Nanticoke, Pa., Saturday, Jan. 20, 1996. The Susquehanna River spilled over its banks causing flooding in low lying areas in the Wyoming Valley. (AP Photo/George P. Widman)
While flooding was almost a sure bet from quickly melting snow and ice-jam flooding, a rainstorm made matters worse.
"This was one of those cases where we knew flooding was a sure bet," Dombek said. "One of those times where you can go out with bold and definitive statements like 'There will be serious and major flooding.'"
Widespread rainfall amounts of 1-3 inches with local amounts of 5 inches added to run-off, according to Dombek.
While heavy snow and ice are not expected to fall over much of the Midwest Sunday into Monday, some slippery roads and travel disruptions are likely.
Fresh cold is setting the stage for the weekend to end on an icy note in Pittsburgh.
A storm coming Sunday night has the potential to bring wintry travel problems to Boston and New England.
The return of colder air was accompanied by a few inches of snow early Friday night with the next chance of wintry precipitation before the end of the weekend.
A storm arriving later in the day on Sunday has the potential to bring snow, some ice and travel problems to the New York City area.
The worst of the ice headed to the eastern U.S. will focus on the I-81 corridor from Virginia to southern Pennsylvania.
Riverview, FL (1996)
A tornado killed one person; 6 mobile homes were destroyed.
Cairo, IL (1917)
17.0" snow set 24 hour snowfall record and single storm total for city.
Connecticut River (1740)
Early snows and hard freeze followed by a thaw and heavy rains produced the greatest flood on Connecticut River in 50 years; on Merrimac in 70 years.