Good afternoon, With the holiday weekend ahead, we wanted to provide an early heads-up regarding the arrival of the coldest air yet experienced to this point in the winter season which is set to arrive in Southern New England Monday and continuing through at least Wednesday. This will lead to a period of well below normal temperatures and the potential for low wind chills. Attached graphics include forecast high and low temperatures for Monday through Wednesday, as well as the probabilities of experiencing sub-zero wind chills and the probabilities of experiencing wind chills of 10 below or colder for Monday and Tuesday. Forecast confidence is high on below normal temperatures, although how low wind chills may reach is less clear as these will depend on expected wind speeds. We are also monitoring the potential for a minor-accumulating snowfall preceding the colder air for Sunday evening into Monday, although confidence in the details specific to this potential system are low at this time. Unless there are significant changes that would warrant otherwise, expect the next update to this briefing to be sent *by late Thursday afternoon*. Thank You! Meteorologist: Andrew Loconto If you have any questions or would like more information, please don't hesitate to contact us. You can reach us via: email: box.operations@noaa.gov phone: 508.622.3280 Slack/NWSChat 2.0 <https://nwschatws.slack.com/> (for approved partners) social media: Website <http://www.weather.gov/boston> | Facebook <http://www.facebook.com/NWSBoston> | Twitter <http://www.twitter.com/NWSBoston>