US Short Term Forecast to Oct 2

...Heavy precipitation threat for the Pacific Northwest fading on
Tuesday...
...Tranquil weather across the Southwest, Plains, and East...

The wet pattern will continue over the northwestern corner of the Country through Monday, before fading on Tuesday as a series of surface cyclones eventually move out of the region into south-central Canada.

A series of cold fronts moving inland over the Pacific Northwest will ignite widespread showers and thunderstorms across the region... and persistent onshore flow dragging anomalous Pacific moisture inland should fuel moderate to heavy rains and elevation snows. The heftiest totals are expected along the windward side of the coastal ranges and Cascades...but enough moisture should spill inland to produce heavy rains across the Northern Continental Divide.

In addition to the soaking rains...strong and gusty winds will accompany the cold fronts...and decreasing temperatures behind the fronts should eventually change rain over to snow in the highest elevations, as well as decrease snow levels, across the Washington Cascades and Northern Rockies.

Scattered showers and thunderstorms will continue along a weakening frontal zone across the Mississippi Valley and Midwest, though coverage will slowly decrease as upper-level support for the system lifts into southwest Canada, which decreases low-level inflow from the Gulf of Mexico with time.

From the Southwest into the Plains, weak mid-level ridging and downslope flow should keep precipitation as bay.

For the Eastern Seaboard, strong surface ridging and cold air advection around the western side of a stubborn ocean cyclone should keep much of the region rain-free over the next couple days.

However...low-level northeasterly flow off the Atlantic could bring showers and thunderstorms inland across Florida and the Carolina coast. Showers and thunderstorms could clip the New England
coast Monday into Tuesday as surface low lifts northward towards Atlantic Canada.


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