More snow and frequent cold blasts coming; 1″-3″ expected early Tuesday

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NEW SURGE OF SNOW AND COLD COMING

A fresh round of snow and cold coming for Tuesday. Good evening. Temperatures are on a temporary rise ahead of a fast moving clipper system that has arctic air in tow.

The low pressure diving southeast overnight brings light snow overspreading the state tonight on southwesterly winds. More snow will accompany a new arctic cold front passing early Tuesday.

The storms are fast moving - hence the name "clipper" and often are starved for moisture. Snowfall could come in two phases. Light snow and snow showers for a time tonight with a bigger burst of snow and blowing snow toward sunrise.

The Tuesday AM commute may be a bit nasty early on. Gusty winds combine to reduce visibility with falling and blowing snowfall. A fresh 1" to 3" is possible area-wide. I'm posting the latest RPM commuter snowfall.

A average of 5 computers places about 1" of new snow for the city with a range of .7" to 1.9".

Regional 18z RPM 12km Snow Accum

Manual Drawn Snow Forecast

More snow to fall as a fast moving clipper system sweeps the are overnight and early Tuesday. 1" to possibly as much as 3" of new snow could fall.

Moisture is lacking but upper air support could create a narrow band of snow perhaps as high as 3" just to the northwest of the storm track. The nose of the approaching jet stream is an area where air piles up and locally heavier precipitation will develop. That nose of the jet stream is pointed right into central Indiana. Based on the info the localized 3" snow (or higher?) could develop.

A narrow band of heavier snow could fall just north of the low pressure track and on the nose of the jet stream

A narrow band of heavier snow could fall just north of the low pressure track and on the nose of the jet stream

A new Arctic blast is behind the system starting early Tuesday. Temperatures will fall sharply Tuesday falling through the teens by evening. Combined with strong winds - gusts to 40 mph possible - the wind chill will fall to the single digits to below zero by the evening commute.

ADI 18z RPM 4km Wind Chill