Lake effect snow will fall in narrow bands.
The rain is expected to taper off Saturday afternoon, when temperatures will likely plummet about 30 degrees, the National Weather Service said.
Little snow accumulation is expected. The unusual warmth will cause any remaining snow to rapidly melt away, which could potentially clog storm drains that would otherwise catch rain.
Crews from Buffalo were out on Cazenovia Creek Tuesday, cutting triangles through the ice to help it break up during the impending thaw and alleviate the possibility for significant ice jam flooding. "Especially in places with poor drainage, it's something to be aware of". The rain is going will hold off until Friday, with the bulk of it coming in two waves, on Friday evening and then Saturday morning. PRECAUTIONARY/PREPAREDNESS ACTIONS. A Flood Watch means there is a potential for flooding. Ice changes to snow.
In addition, Long Islanders are urged to remain off of all frozen bodies of water - such as lakes, ponds - as increased temperatures and excessive rainfall may cause ice surfaces to weaken and become unsafe. Day, will be partly sunny with a daytime high near 23 degrees and a nighttime low of about 18 degrees.
The winter weather advisory cautions travelers to prepare for slippery roads throughout MA on Saturday, as a flash freeze will quickly turn water and slush into ice.
Though the snow is predicted to stop Thursday night, the National Weather Service says winds are predicted to stay around 15 to 20 miles per hour until midnight, then drop to five to 10 miles per hour.
The rain is expected to continue into the evening, with the possibility of another thunderstorm; some of the storms could produce heavy rainfall and additional areas of fog before midnight. Wind chill values as low as minus 5 degrees.
With up to four inches of rain expected in some areas, the National Weather Service has posted a flood warning for the entire state.