Good morning, A significant winter weather impact will occur across most of Southern New England, especially taking place during today's afternoon into evening commute. Please see the attached slides detailing amounts and timing of anticipated threats, while details concerning impacts and uncertainty are provided below. *What has changed ...* - *WINTER STORM WARNINGS ...* - Issued for northern and northeast Massachusetts - In addition to Berkshire County, Massachusetts and Litchfield County, Connecticut. - *WINTER WEATHER ADVISORIES ... * - Expanded to include areas along and south of the Massachusetts Turnpike. - In addition to all but Litchfield County, Connecticut, all of Rhode Island, as well as Southeast Massachusetts. - Please see the attached graphic outlining headlines. *What / Where / When ...* - Onset snow transitioning to sleet before mixing with or changing over to freezing rain across the interior, before mixing with or changing over to rain along the coast. - Snow / sleet accumulations on average ranging around 3 to 6 inches over Southern New England. - Please see the attached storm total snowfall graphic for specifics. - Ice accretion of a trace up to two tenths across interior Southern New England especially around the Worcester / Hartford / Springfield region. - A low threat of tree and power line damage. - Please see the attached storm total ice accretion graphic for specifics. - Winter weather begins around noon for the Hartford / Spingfield metro, 1 pm for Worcester / Providence, and 2 pm for Boston - Please see the attached animated graphic highlighting precip-types for rough estimate of timing. - *Significant impact for today's afternoon into evening commute.* - Hazardous travel conditions with slick roadways. - Most intense snow expected during today's afternoon into evening commute. More than likely will accumulate even on treated roads. - Expect slowed commutes, long drives home, especially if more cars are on the road and if any accidents. - Reductions in visibility with any snow and / or sleet. - Lower visibility especially as around 1 inch per hour snowfall rates are anticipated before mixing with then changing over to sleet - Moderate to heavy snow mostly falling during today's afternoon into evening commute. - Less impact to the Wednesday AM commute as steadier precipitation concludes, some show shower activity lingering across N&W MA - However can't rule out some lingering icy roadways across interior MA and CT, especially if left untreated. *Uncertainty ... * - While specific snow amounts are still uncertain, hinging on exactly when snow will change to sleet, the bigger message is the anticipated *significant impact* to today's afternoon into evening commute. Please, do not hesitate. Should you have any questions, comments and/or concerns, we are here 24 / 7 to help you. If you are looking for an hour-by-hour forecast for your area, please visit the following website below ... https://forecast.weather.gov/gridpoint.php?site=box&TypeDefault=graphical Respectfully, Benjamin Sipprell Meteorologist NWS Boston / Norton If you have any questions or would like more information, don't hesitate to contact us via this email address, on NWSChat <https://nwschat.weather.gov/>, or at the following: National Weather Service Boston/Norton, MA 46 Commerce Way Norton, MA 02766 508.622.3280 Website <http://www.weather.gov/boston> | Facebook <http://www.facebook.com/NWSBoston> | Twitter <http://www.twitter.com/NWSBoston>