Update: Sandy’s Gone, Dryness Remains
Summary: After last week’s devastation caused by Hurricane/Superstorm Sandy, calmer conditions slowly returned as the storm weakened over the eastern Great Lakes region and tracked northward. In its place, an upper-level trough of low pressure settled over the Northeast, producing unsettled weather (light precipitation and subnormal temperatures) to much of the Great Lakes region, New England, and mid-Atlantic. Unfortunately, a new Nor’easter threatened areas hit by Sandy as the period ended.
In the West, a series of Pacific systems dropped moderate to heavy precipitation (1 to 3 inches, locally up to 8 inches) on northern California, coastal Oregon, western Washington, and the northern Rockies.
Meanwhile, a persistent ridge of high pressure located over the central Rockies kept the Southwest, Great Basin, and southern halves of the Rockies and Plains unseasonably mild and dry. The weakened Pacific storm systems were diverted northeastward into south-central Canada by the ridge, then southeastward by the eastern trough into the northern Plains, lower Missouri Valley, the Delta, and across the Southeast. This brought light precipitation (0.1 to 0.5 inches, locally an inch) to the aforementioned regions.
In Hawaii, mostly dry weather prevailed while stormy weather soaked the southeast Alaskan Panhandle.
Looking Ahead: During the next five days (Nov. 8-12), a Nor’easter will impact the Northeast with strong winds, coastal rains, and inland snows before departing this Saturday.
Meanwhile, unsettled weather will envelop the West as subnormal temperatures and showers replace this week’s abnormal warmth. The largest precipitation amounts are expected in the northern Rockies and Plains.
Late in the period, a cold front is expected to produce moderate to heavy rain from eastern Texas northward to the upper Great Lakes region. Greatest totals (1.5-2.5 inches) are expected from western Arkansas northward into southern Wisconsin. Temperatures will average above normal in the eastern half of the Nation, and below normal in the West.
For the 6-10 day outlook (Nov. 13–17), the odds favor above normal precipitation in the Northwest, eastern third of the nation, and northern and western Alaska while subnormal precipitation is expected in the central Rockies and Plains and southeastern Alaska. Unseasonable warmth is predicted for the northeastern quarter of the U.S. and extreme northern Alaska while odds are tilted toward subnormal readings in the West and southern Alaska.