Winter Weather Advisory for Larchmont and Mamaroneck

Written By LANNING TALIAFERRO (Patch Staff)

The National Weather Service has issued two statements:

• Winter Weather Advisory in effect from December 28, 08:00 PM EST until December 29, 6:00 AM EST
• Hazardous Weather Outlook

HAZARD TYPES...SLEET AND FREEZING RAIN. * ACCUMULATIONS...A TRACE OF SNOW AND ICE ACCUMULATION. * TIMING...A WINTRY MIX DEVELOPS ACROSS THE TRI-STATE FROM WEST TO EAST THIS EVENING. THIS WINTRY MIX CHANGES TO PLAIN RAIN SOMETIME BETWEEN MIDNIGHT AND 6 AM TUESDAY. * IMPACTS...SLIPPERY ROADWAYS AND SIDEWALKS. WITH THE MAIN THREAT BEING TO ELEVATED SURFACES AND HIGHER ELEVATIONS IN THE ADVISORY AREA.

“Temperatures at the surface will be cold enough to support snow, but up at cloud level, the warmth surges into the Hudson Valley,” says Bill Potter of Hudson Valley Weather. “ This causes the precipitation to fall as rain, but there is a deep layer of cold air below the clouds, and that will freeze the rain droplets as they fall… and they reach the ground as sleet (ice pellets).

“The deep layer of cold air should hold on for several hours, and could give us an extended period of sleet… prior to mixing with freezing rain toward sunrise. This sets the stage for a treacherous Tuesday AM commute.”

MAP: AccuWeather.com