Weather Underground Forecast for Monday, February 18, 2013.
A storm system in the Northern Plains will push eastward into the Upper Midwest on Monday, while an associated front reaches from the Upper Midwest through the Southern Plains. Energy from this system and cold temperatures in the north will support more snow shower development in parts of the Northern Rockies and Northern Plains through the Upper Great Lakes as the system shifts eastward. Wintry precipitation will continue eastward and spread across the Northern Appalachians into the Northeast through Tuesday. Snowfall accumulations of 1 to 6 inches are forecast from North Dakota to into the Northeast through the beginning of the week with isolated amounts of 6 to 12 inches in northern Michigan due to lake-effect snow behind the storm.
Meanwhile, to the South, ample moisture from the Gulf of Mexico will allow rain showers along the western and central Gulf Coasts to spread northward ahead of the aforementioned front through the Ohio Valley and lower tier of the Upper Great Lakes. Due to the fast moving nature of this storm, rainfall amounts across the area are only expected to reach up to an inch in most locations. Some showers in southern Arkansas, Louisiana, and Texas may become accompanied by isolated thunderstorm activity during the afternoon.
Out West, a Pacific frontal system will approach the Pacific Northwest and northern Caifornia with rain showers and high elevation snow. This precipitation is expected to expand across California through the beginning of the week.
Temperatures in the Lower 48 states Sunday have ranged from a morning low of -25 degrees at Land O' Lakes, Wis. to a high of 77 degrees at El Centro, Calif.