UPDATE: 5:35 p.m. National Weather Service predicts 20-30 inches of snow, warns motorists of 'nearly impossible' driving conditions.

UPDATE: 3:24 p.m. - The National Weather Service is reporting more than 1 foot of snow in all four counties in Western Massachusetts, across the state and Connecticut.

SPRINGFIELD — The National Weather Service has issued a winter storm watch for all four counties in Western Massachusetts as well as Worcester, Boston and other parts of Massachusetts and Connecticut.

Snow is expected to begin on Monday evening and continue on until Tuesday night.

The site is warning residents of heavy snow along with considerable blowing and drifting snow. Near blizzard conditions are possible, although they will most likely not affect Western Massachusetts.

In his Saturday forecast media partner to The Republican CBS3 Meteorologist Mike Skurko predicted between 4 to 8 inches of snow across the Springfield area. He said the numbers have risen since then.

In most communities across the state it seems numbers have rise to between 18-24 inches of snow, based on National Weather Service reports.

Whatever the storm may be, the weather settles back down for Wednesday and Thursday with mostly sunny skies, he said.