STORM To Possibility FORM Off The East Coast J7409 Weather. watch
Widespread record cold spreading from the Plains eastward toward the
East Coast...
...Early season snows across western to northern New York and northern New
England will gradually taper off today...
...Active Lake Effect snows continue downwind of the Great Lakes...
...Persistent warm and dry weather over the West will continue to elevate
fire weather threat for portions of southern California...
The arctic airmass that has settled into the Plains will continue to
spread record cold temperatures south and eastward into the Ohio Valley
and down into the southern Plains today. By Wednesday morning, record low
temperatures in the teens and 20s will be common along much of the East
Coast, the Ohio Valley, and down as far south as the upper Texas coast,
making it feel like the middle of winter for these areas. This latest
arctic outbreak will begin into moderate on Thursday as the center of the
expansive high pressure system begins to move off the New England toward
the Canadian Maritimes.
In addition to the arctic chill, an area of low pressure developing along
the arctic front is currently bringing a wide swath of snow from the
Tennessee Valley, along the Appalachians and upstate New York into
northern New England. Much of the snow is expected to taper off the
flurries later today in these areas as the low pressure center rapidly
intensifies and moves into the Canadian Maritimes. Rain will likewise
moves rapidly across the Deep South and the Southeast today before the
arctic chill arrives. Florida will see the showers linger into Thursday.
By early on Thursday, an upper-level disturbance arriving from northern
Mexico will increase the chance of rain along the Gulf Coast as a coastal
front forms just offshore.
In contrast to the central and eastern U.S. record cold, much above
average temperatures are expected across the West into the Great Basin and
Rockies. The warm temperatures, low relative humidities and dry
conditions will continue to elevate the threat of fire weather for
portions of Southern California into the Southwest over the next two days.
The next upper-level disturbance moving onshore across the Pacific
Northwest will spread snow and mixed precipitation through the interior
sections of the Northwest and the northern Rockies today into tonight with
light accumulations expected. The light snow and mixed precipitation are
expected to move rapidly across the central Plains on Wednesday before
reaching the Great Lakes early on Thursday.
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