weather.gov
|
weather.gov
|
 |
National Weather Service |
 |
|
| National Operational Hydrologic Remote Sensing Center |
 |
Home | News | Organization |  |
|
National Snow Analyses
Weather SummaryA strong storm moved into the Southwest yesterday. One to 2 feet of snow were widespread at middle and higher elevations in the region. Up to 3 feet of snow, which began Sunday evening fell in the Sierra Nevada. At lower elevations in southern California and southern Arizona, 1 to 2 inches of rain fell. Rain also fell in the lower Mississippi River valley yesterday. Warm snowpack temperatures exist in the middle Mississippi, lower Ohio, and upper Tennessee river basins, but little snowmelt occurred. Lower- and middle-elevation snowmelt occurred across southern California, southern Arizona, and southern New Mexico mainly due to rainfall. The Cascades remained warm with slow snowmelt. Moderate surface sublimation occurred at the higher elevations of southern New Mexico and the high elevations of the southern Sierra Nevada; in the latter location, some blowing-snow sublimation occurred. This morning, a strong and deep surface low is present over Colorado. A strong fetch of gulf moisture is over the southern High Plains, with strong northwesterly winds in the western Four Corners states. A deep midlevel trough is present over the West with a potent disturbance upstream of the Four Corners, and strong westerly winds are aloft. These features will become better aligned tonight as the surface low moves into the Plains, and a rapid deepening of the low is expected tomorrow. The features will move smartly northeastward during the next couple of days. A foot of snow is likely in Colorado today due to upslope flow. Some areas, mainly on southeastern slopes, could receive up to 2 feet of snow today. A widespread area of at least 1/2 foot of snowfall is expected from the central Plains through western lower Michigan. A narrow band of at least a foot of snow is possible from northeastern Kansas through southeastern Wisconsin. On the warm side of the storm, 1 to 2 inches of rainfall are likely from the lower Mississippi River valley through the Middle Atlantic states. There is a good chance of freezing rain in the central Appalachians to Lake Erie today. Tomorrow, snowfall will continue in the Great Lakes and spread eastward to northern Maine, around 6 inches of snowfall is likely, and up to a foot is possible. In the Northeast, snowfall is expected in the western portions, but 1 to 2 inches of rainfall is expected over much of that region tomorrow. To the north and west of the deepening surface low, strong cold air advection will occur across the Great Lakes from Tuesday night through Friday. One to 2 feet of snowfall is likely in areas to the south, then east of the Great Lakes. Smaller unfrozen lakes will enhance snowfall downwind of them due to the strong winds, especially in the central to lower Great Lakes. Cold air will spread quickly southward across the central and eastern U.S., and snow that falls during the next couple of days will not melt except at the southern extent of the snowpack. Another system, somewhat disorganized, will approach California on Thursday and bring 1 to 3 feet of snowfall to the Sierra Nevada and northern California mountains Thursday through Saturday. Snow Reports
Note: these data are unofficial and provisional.
Station Snowfall Reports Interpolated Snowfall Products Model Assimilation
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
