April Could Shower Some of US With More Snow.
Late-season snow has been fairly common from the western mountains to parts of the East Coast this year, and a persistent weather pattern of cooler-than-average temperatures and an active storm track means that more of the same is likely in the coming weeks.
In other words, it might be April snow — not showers — that brings May flowers for some of us.
A couple of late-season snow producers will be on the weather map this week alone, with the greatest threat being in interior parts of the mid-Atlantic and Northeast from Thursday night through Friday. A storm moving northward through this region has the potential to produce heavy, wet snow from West Virginia northward into parts of New York state and interior New England.This storm will follow on the heels of a storm that will track from western Kansas today to offshore of the mid-Atlantic region Wednesday night. It will be chilly enough for a little snow along the northern fringe of the storm; however, snow amounts will not be as impressive as they were with a weekend storm that took a similar track.
To the south of this initial storm, dangerous thunderstorms will once again be a danger today and tonight, with thunderstorms capable of producing large hail, damaging winds and isolated tornadoes in eastern Texas, Louisiana and southern Mississippi.Regardless of the amount of snow that these next two storms produce, the overall weather pattern will remain favorable for late-season snow through at least the first week of April.
The Climate Prediction Center is forecasting cooler-than-average temperatures across the entire northern tier of the country into at least the second week of April, with the likelihood of more precipitation than normal in the Pacific Northwest and northern Plains, as well as from the Ohio Valley to the Northeast, including the mid-Atlantic region.
April and even May snowfall is far from unprecedented across the northern tier of the country, including the mid-Atlantic region and Northeast.
In Pittsburgh, the latest accumulating snow (3.1 inches) occurred on May 3, 1966. In Albany, N.Y, a trace of snow has occurred as late as May 28 (1902), and the April snowfall record is 17.3 inches, on April 6, 1982.
The overall weather pattern of chilly storms tracking across the northern half of the country is fairly typical of a spring with an on-going La Nina. The La Nina is a cooling of the water in the equatorial Pacific, which, in turn, influences global weather patterns. Across the United States, one the primary effects is a more active than normal northern storm track, which often persists into spring.
The current La Nina has begun to weaken in recent weeks, and government experts expect it to dissipate by June.