The eastern two-thirds of the U.S. will be under the influence of two cold fronts today, while cool, Canadian high pressure settles over the Western U.S.
A low pressure system will march across the Midwest, Ohio Valley and Northeast for the middle of the work week. This low pressure system will also force a cold front across the East. Rain showers are possible across the central Plains and Midwest during the morning, with showers or a rain/snow mix across the Great Lakes.
Rain showers will continue across the Midwest during the afternoon and evening. Rain will also be likely for the Ohio Valley, northern Mid-Atlantic and southern parts of the Northeast. Wet snow or a rain/snow mix will be in the forecast for the Great Lakes as well as the interior Northeast.
The next cold front will drop south across the Upper Mississippi Valley late in the day and overnight. This will bring a small chance for flurries or light snow to parts of far northern Minnesota, while rain or a rain/snow mix develops from the Dakotas into southern Minnesota.
Meanwhile, on the opposite side of the country, high pressure from Canada will expand southward into the Western U.S. today. Expect cooler temperatures and dry weather for most of the West as a result.
The exception will be parts of the Rockies which will be under a cold northwest flow, transporting a small amount of moisture into the region. Flurries or light snow showers are possible in the northern Rockies during the morning, with chances for snow shifting to the southern Rockies in the afternoon and evening.
Highs in the 20s and 30s will be the coldest temperatures in the nation today, which will occur throughout the Rockies as well as the far northern Plains, some parts of the Great Lakes and the interior Northeast. Forties and 50s will cover the rest of the Mountain West into the central Plains, Upper Midwest, Lower Great Lakes, Mid-Atlantic and southern portions of the Northeast.
Milder 60s and 70s are expected for the Pacific Northwest and most of California along with the southern Plains, Deep South and Southeast. A few 80s will be found in southern Texas, with extensive 80s and a few 90s for southern California and the Desert Southwest!