"The current forecast calls for a large area of 5-9" total snowfall which would be for most of the area, while far northern counties and western counties, over towards the Twin Cities may get a bit less, more likely 3-6".
A low pressure system brewing over the southern plains States may intensify into a winter storm as it tracks over southern Ontario Tuesday, the statement said.
Snow will begin during the day on Tuesday.
This snow will start off light to moderate for the first couple of hours, and then turn heavy at times as we head into the late afternoon and evening.
Temperatures are in the teens or single digits.
The daytime high should reach 32 degrees before temperatures drop 4 degrees at night, the weather service said.
But it wasn't all fun and games for the people scheduled on the hundreds of flights that were canceled in Seattle and Portland over the weekend. The third storm of the week will move in Thursday afternoon and go through Thursday night. Hundreds of flights were cancelled in Seattle and Portland, and heavy snow drifts closed major highways in eastern Washington. Even though we won't be down to freezing in DC, a little sleet on the roads could still cause some slippery spots overnight and early Monday morning. Downed tree limbs and power outages are possible along I-94 where ice accumulated earlier in the day. This view looks south from Northeast 160th Street.
Parts of the US Pacific Northwest are being inundated with unusually high levels of snow.
Interstate 405 was covered with snow and ice, but vehicles still passed through on Saturday.