Weather across America

(NATIONAL) Mainly beneficial, drought reducing rainfall across the Western and Central Gulf Coasts, light snow will develop over portions of the Northern Cascades, Northern Rockies and over Northern New England, and broad area of pleasant weather should dominate the Central Rockies, Central and Northern Plains into the Midwest.

A stalled front across the Gulf of Mexico will start to buckle in response to the approaching weak mid-level trough of low pressure exiting the Four Corners. A surface low will develop in the western Gulf and enhance the unsettled weather along the Gulf Coast (particularly west and central). 

Prolonged moderate and occasionally heavy rainfall will continue to provide beneficial rainfall to the drought-stricken region; however, given the prolonged nature, spots of flooding cannot be ruled out especially in sensitive areas like urban centers or along roadways.  

The highest focused area of rainfall is likely to affect far SE Texas into Louisiana from late Monday into Tuesday, sliding toward the Western FL Panhandle by late Tuesday. A Marginal Risk of excessive rainfall has been posted by the Weather Prediction Center for each day from South Texas on Sunday to East Texas/Louisiana on Monday and East Louisiana West Florida on Tuesday, occasional thunderstorms are possible and with limited sunshine will keep temps in the 60s and low 70s, generally about 5-10 degrees below normal.  

The Pacific stream is likely to be a bit more active through the period, though generally average for this time of year. A weak surface low and associated front lift through the Northwest and across British Columbia later today into Monday bringing typical light rain and high-elevation snows to the Cascades. A mid-level trough of low pressure will dig southward on Monday, well west of the West Coast and develop a stronger, deep surface low along 130W. 

This will keep cloudy and above average moisture in proximity to the California and Oregon coast through Tuesday with the more significant weather/rough seas still well offshore. Elsewhere, there will be some light rain/snows for the Northeast ahead of a fast moving and rapidly weakening older Pacific system that has crossed into the northern Plains Sunday. These showers/snow showers will translate across New York into New England later Monday into Tuesday with little fanfare, with only slightly below average temperatures.   

Behind this system, well above warmer air will cover much of the remainder of the Contiguous US, reinforced by the Pacific system after crossing the northern Rockies late Monday into Tuesday. Temperatures will be into the 50s and 60s across the northern Plains, generally 15-25 degrees above normal.