This is the blog for the United States' national forecast. These summaries are by Weather Underground forecasters and are updated twice each day.
By: nationalsummary , 10:12 PM GMT on August 09, 2014
Weather Underground Forecast for Sunday, August 10, 2014
A cold front will extend from the middle Mississippi Valley to the Mid-Atlantic on Sunday, while a separate cold front will move across the Plains.
A slow moving frontal boundary will extend across the middle Mississippi Valley, the Tennessee Valley and the southern Mid-Atlantic on Sunday. Warm, muggy air from the Gulf of Mexico will collide with this frontal boundary to initiate showers and thunderstorms across the lower Mississippi Valley, the Gulf Coast, the Ohio Valley, the Tennessee Valley, the Mid-Atlantic and the Southeast. The majority of the northern Mid-Atlantic and the Northeast will stay clear of precipitation due to high pressure over the region. The exception to this will be over northern New England, where scattered showers will linger during the morning.
A separate cold front will extend from the central Plains to the upper Midwest. This frontal boundary will move slowly southeastward, and will bring widespread rain and thunderstorms to the central and northern Plains.
To the west of the Continental Divide, lingering monsoonal moisture will bring a chance of afternoon showers and thunderstorms to parts of the Intermountain West and the Great Basin. The majority of the West Coast will stay warm and dry on Sunday due to a ridge of high pressure draped over the eastern Pacific. Temperatures are forecast to range between the 90s and 100s across the Desert Southwest.
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Light Rain Mist