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Monday, January 17, 2011

Rain/Snow/Ice Storm Tuesday

Get ready for a messy wintry mix as low pressure moves up the east coast. There is a Winter Storm Warning in effect for Hartford, Tolland, Litchfield, and northern Fairfield and New Haven Counties until 7 AM Tuesday morning. A Winter Weather Advisory is in effect for Windham, New London, Middlesex, and southern Fairfield and New Haven Counties from 6 AM until 3 PM Tuesday.

Timing: Snow will break out between 2 AM- 6 AM before mixing in with sleet and freezing rain. Mixing will happen in the early morning for the shoreline, mid morning for central Connecticut and late morning for the northern hills.
Eventually, as more warm air works in, the icy mix will give way to plain rain during the afternoon and temperatures will reach the low and mid 30s. Rain will come down heavy at times late-afternoon, especially in eastern Connecticut which could create sloppy conditions for the evening commute.

Ice Impacts:

Ice accumulations on tree limbs and power lines could result in some downed trees and power lines. This will especially be a concern in northwest Connecticut where ice could accumulate .2”-.4”.

Icy roads are harder to navigate than snow covered roads. Roads will be very slippery at times, especially before the changeover to rain. There may be flight delays and cancelations as airports deal with the icy conditions.

Rain Impacts:
With snow blocking storm drains, poor drainage flooding will be an issue. Rain can also add weight to the existing snowpack which can put stress on rooftops.

Rain will help melt some of the snow sitting around, creating a slushy mess on the road for the evening commute

Snow Impacts:
Roads will be snow covered early Tuesday morning. Snowfall accumulations will not be as noteworthy as the ice or changeover to rain. I am expecting 3”-6” north of I-84, 1”-3” everywhere else, with the exception of the immediate shoreline and southeastern CT who will see 1” or less.

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