weather.gov
|
weather.gov
|
 |
National Weather Service |
 |
|
| National Operational Hydrologic Remote Sensing Center |
 |
Home | News | Organization |  |
|
National Snow Analyses
Weather SummaryA weak surface low over the southern Great Lakes beneath a moderately-strong midlevel low moved eastward to the East Coast yesterday. This system caused a widespread 3 to 6 inches of snowfall to occur in an area which encompassed the Great Lakes to the Ohio River basin. Locally heavier amounts up to a foot were present in lake-effect areas south of Lake Michigan and Lake Erie. Up to 1/2 foot of snowfall had fallen in and around the northern Appalachians to the coast by midnight as this system merged with an offshore system moving northeastward from the Carolina coast. Another 3 to 6 inches of snowfall had fallen this morning, with the higher amounts at higher elevations. A tight, potent surface low approached the Washington coast yesterday. Light snow and rain fell in the western part of the state in response. This morning, forty-nine states had snow in some part of them. (Hawaii is not modeled by us, but there are reports of snow on Mauna Loa.) Regarding the coterminous U.S. snow pack: In the South, the southern extent of the snowpack was warm , but little melt occurred yesterday. Warm conditions also exist in the Cascades through the southern Sierra Nevada, but here, too, little snowmelt occurred on Tuesday. This morning, a deep surface low exists off the Massachusetts coast. This low is expected to be just east of Nova Scotia by tomorrow morning and continue moving northeastward. Today, at least a half foot of snowfall is expected from central New York through Maine, with up to a foot of snowfall probable from southern Vermont and western New Hampshire to southeastern Maine. Little snowfall is expected tomorrow in the Northeast. Up to a foot of lake-effect snowfall is likely today south the lower Great Lakes in response to northerly winds flowing around the deepening offshore surface low. This lake-effect snowfall will also bring up to 1/2 foot of new snow to the central Appalachians. Cold air from snow-covered eastern Canada and the Midwest will continue to flow into the Southeast through Thursday. The snowpack across the Great Lakes and Midwest will not allow the air to modify much from its source region, and cold temperatures are expected to continue for this region through Friday. Little snowmelt (and ice melt) is expected in the South through Friday. Onshore flow will continue into the Northwest during the rest of the week. A foot of snowfall is likely across higher elevations in the northern West each day during this period. Heavy rainfall is expected at lower elevations coastward of the northern Cascades, while lighter amounts are likely at lower elevations in the interior northern West. Snow Reports
Note: these data are unofficial and provisional.
Station Snowfall Reports Interpolated Snowfall Products Model Assimilation
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
