A forecast calling for snow when the temperature is above the freezing mark may seem impossible, but that is exactly what will take place across parts of the East through Wednesday.
How cold the air is in the upper levels of the atmosphere is more important to the survival of a snowflake than what the temperature is at the surface.
Once a snowflake forms, it can survive the trip to the ground if the atmosphere below that point is subfreezing. The snowflake will melt into a rain drop if it passes through a deep layer of air that is above freezing.
If the temperature near the surface is not significantly above freezing, the snowflake will not have time to melt until it actually touches the warmer ground.
If you still have doubts and live across the Northeast, just keep checking your thermometer as you see Wednesday's snow fall.
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Umbrellas and raincoats will be put to good use by those along much of the Interstate-95 corridor as rain moves northward during the middle of the week.
Temperatures will rebound across the Northeast this coming weekend, after a setback with clouds and rain along the coast before Friday.
A storm from the Pacific Ocean will first raise the fire danger in California, then bring cooler air and spotty rain for firefighting efforts.
A chilly start to fall has provided a sufficient cold blast to bring out the vibrant colors of autumn leaves.
A melting alpine glacier on Mount Shasta in northern California created a messy situation as the flowing ice water turned into a disruptive mudslide with more harmful rainfall on the way.
Kansas City, MO (1993)
Severe early morning thunderstorm brings 90 mph wind gusts to the area.
Snow in the Appalachians.
Stowe, VT (1885)
12" of snow.