Here's a definition from the National Weather Service out of Taunton.
"Blizzard- Includes winter storm conditions of sustained winds or frequent gusts of 35 mph or more that cause major blowing and drifting of snow, reducing visibility to less than one-quarter mile for 3 or more hours. Extremely cold temperatures often are associated with dangerous blizzard conditions."
A blizzard warning is issued when blizzard condition are expected or are occurring.
To read the technical discussion for Blizzard Colbie, click here.
For more information on state preparations, click here.
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