From Connecticut’s Division of Emergency Management and Homeland Security:
A double barrel low pressure system is forecast to move just south of our area on Wednesday and Wednesday night. The National Weather Service has issued Winter Storm Warnings for the entire state beginning at midnight and continuing until 8:00 am Thursday morning. The following forecast is based on a blend of the NAM and GFS models.
WEDNESDAY MORNING: Light snow is forecast to spread slowly into the state between 7:00 AM at the coast to noon in the Hartford area. No significant impact is expected on the morning rush hour or late morning travel. Temperatures are forecast to drop a few degrees at the start of the light snow and hold between 25 – 30 F across most of the state. Northeast winds are forecast to gust to 25 MPH inland and 35 MPH along the coast at times.
WEDNESDAY AFTERNOON: The snow is forecast to become moderate in Southern CT by the afternoon rush hour at 3:00 PM. The snow intensity in the Hartford area is forecast to become moderate between 3:00 – 6:00 PM. Total accumulations by the rush hour are forecast to range from less than 1″ in the Hartford area up to 1″ – 3″ along the coast. The impact on the afternoon rush hour is expected to be minor in Northern CT and minor to moderate in Southern CT. Highs remaining near 30 F. Minor coastal flooding is possible during the afternoon high tides in Western Long Island Sound around 3:00 PM.
WEDNESDAY EVENING AND OVERNIGHT: A period of moderate to heavy snow is possible between 5:00 PM and 11:00 PM across most of the state. The impact on travel could be moderate to major with heavy snow falling and sticking to roads. Lows in the upper 20’s. The snow is forecast to end before daybreak on Thursday. A minor impact to the rush hour is still possible Thursday morning.
Total accumulations are forecast to range from 3″ – 6″ along the southeast coast (where sleet and rain may mix in), up to 6″ – 12″ in a wide band across the center of the state. Less snow is expected in the NW Hills with 3” – 6”.