...Snow for parts of the Upper Great Lakes...
...Temperatures will be 15 to 30 degrees below average for most of the Upper Midwest...
A front extending from the Upper Mississippi Valley southwestward to the Central Plains and then westward to the Pacific Northwest will slowly move eastward to the Upper Great Lakes, but quickly southward to the Southern Plains/Southwest by Tuesday. The storm will produce light to moderate rain along and ahead of the boundary over the Upper Mississippi Valley, on Sunday evening, expanding into parts of the Middle Mississippi Valley/Upper Great Lakes by Tuesday.
Showers and thunderstorms will develop over parts of the Central Plains that will move southeastward to parts of the Middle/Lower Mississippi Valley and the Southern Plains by Tuesday.
Snow and daytime lower elevation rain will develop over parts of the
Pacific Northwest eastward to the Northern/Central Rockies/Northern High Plains on Sunday evening. The snow will move southeastward to the Central High Plains/Central Plains by Tuesday morning. In some areas, snow will fall at a moderate rate Sunday evening into Monday evening.
In addition, on the northwest side of the precipitation shield, snow will develop over parts of the Middle Mississippi Valley to the Upper Great Lakes. Furthermore, snow will develop over the western portion of the Upper Peninsula of Michigan late Sunday night through Tuesday, with snow moderate at times. Behind the system, cold high pressure from
west-central Canada will move southward to the Central Rockies by Tuesday.
A lingering front over the southern portion of Florida will spawn an area of low pressure that will move northeastward just off the
Southeast/Mid-Atlantic coast. Showers and thunderstorms will develop over southeastern Florida through Tuesday morning. Mainly rain will develop along part of the Mid-Atlantic coast moving into parts of Southern New England coast by Tuesday.