Winter Contrast

A look at the Monday mid day weather map shows quite a winter contrast.

print_usbw1A cold front runs from the Great Lakes to the lower Mississippi Valley. East of that front, mid day temperatures run in the 50s and 60s as far north at the Mid Atlantic region. Arctic air lies west of the front.

High temperatures yesterday in Montana, Wyoming and the Dakotas were all below zero with many areas never reaching -10 degrees. This morning at 9:00am (MST) it was -26 at Lewiston MT, -19 at Bismark ND and -18 at Rapid City SD.

The northern Plaines were hit by a blizzard over the weekend and there is considerable snow cover which is contributing to the cold conditions.

snoNOAA Visible Satellite Image Monday Afternoon

The satellite image above clearly shows the snow cover over the Dakotas, northern Nebraska, northwest Iowa, western and southern Minnesota, northeast Colorado and its’ mountains, all of Wyoming, much of Montana and southern Alberta, Manitoba and Saskatchewan. The white shading over these states and provinces is not clouds but, rather, snow on the ground.

The map below is from National Operational Hydrologic Remote Sensing Center. It shows snow depths across the nation as of Monday morning.

nsm_depth_2008121505_nationalSource: NOAA/National Weather Service

The coldest air behind the front will not move toward the eastern seaboard. The front is expected to become a bit more east-west oriented and stall just south of the Baltimore-Washington region, placing us in colder air but nothing extreme. Several disturbances are expected to move along the stalled front this week, keep the weather unsettled over the Mid Atlantic region.

John Collins

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