The broad area of low pressure responsible for widespread winter impacts, including blizzard conditions across portions of the Plains earlier this week, will continue to gradually weaken and move east from the mid Mississippi Valley to the Ohio Valley.
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This will bring areas of mixed precipitation from the mid Mississippi Valley though the Ohio Valley and into the central and southern Appalachians over the next couple of days.
Some heavier, but brief, snowfall may occur near the upper low as it drifts across the mid Mississippi Valley this evening.
However, expect most of the areas impacted to see only minor snow accumulations.
In the East, rain will continue to spread through the mid Atlantic and Northeast.
A coastal low strengthening and tracking north along the northern mid Atlantic and Northeast coasts is expected to help focus heavier rains from the northern Delmarva to southern New York and New England tonight into early Thursday.
These rains may produce excessive runoff, resulting in the flooding of rivers, creeks, streams, and other low-lying and flood-prone locations.
Onshore winds along with astronomical high tide are expected to produce minor coastal flooding along vulnerable waterfront and shoreline areas in the New York City metro.
With no cold air in place, this will be an all rain event for most of the Northeast.
Maine is forecast to be exception, where the cold air behind a slow-moving frontal boundary will support some mixed precipitation, with light snow and icing expected.
Meanwhile, moisture well ahead of a couple of large Pacific cyclones is forecast to produce unsettled weather along the West Coast for the next couple of days.
These systems will generate rain and high elevation snow over the Pacific Northwest and California, while much of the reminder of the western U.S. is forecast to remain dry.
Below-average temperatures are forecast follow a cold front moving from the southern Plains and the lower Mississippi Valley today through the Southeast later this week.
Elsewhere, temperatures are expected to remain seasonal to above-average through the period. ■