Rain will come down heavy at times on Friday. During the morning commute, there could be some slippery spots in the northern hills with a lingering wintry mix. But everyone will change over to plain rain. Temperatures will peak in the 40s to low 50s. With snow melt combined with 1”-2” of rain, poor drainage flooding and ponding water is possible. The heaviest rain will come down in the morning through late afternoon. Don’t be surprised if you hear a rumble of thunder or see some lightning tomorrow when the front swings on through. If we experience some convection (thunderstorms), rainfall amounts could be even higher in spots! The storm changes back to snow temporarily Friday night before moving out. Some of the models show a coating -1.5” Friday night. With the milder air in place, I think that’s a little overdone. But there could be some slippery spots. A storm Sunday could bring a light snow accumulation with another rainstorm likely Monday.
This timelne below basically says the same thing in a different layout. It's a little more detailed. I had to write it for the Courant so I thought I would paste it in here anyway.
Storm Timeline & Summary:
AM Commute: During the morning commute there could be some slippery spots in the northern hills with a lingering wintry mix of snow/sleet/freezing rain. Everywhere else (most of the state) plain rain will fall for the commute, creating a sloppy and wet ride or walk to work and school.
Afternoon: The heaviest rain will fall during the late morning through the late afternoon. With temperatures peaking in the 40s to low 50s, snow will start to melt, especially along the shoreline. With snow melt, and an additional 1”-2” of rain, poor drainage flooding and ponding on the roads is likely. Rainfall amounts could be higher in areas that experience a thunderstorm.
Evening: The storm will move out tonight after the evening commute, changing back to a wintry mix/snow briefly. The ground will still be warm so initially any snow should melt on contact with the road. But there could be some slippery spots with a light coating of snow. Winds will increase dramatically, gusting up to 50 mph in southern Connecticut. Winds that strong, combined with the wet ground could result in isolated power outages.