Scattered storms are expected to cross the Plains on Sunday. A low pressure system skirting across the U.S. and Canadian border will advance northeastward and into central Canada. This will pull a cold front off the Rocky Mountains and into the Plains, kicking up scattered showers and thunderstorms.
The southern side of this system will become stronger as it draws added moisture from the Gulf of Mexico. Thus, there is a slight chance of severe weather development across Oklahoma and Texas. Expect strong winds, large hail, and bouts of heavy rainfall. Rainfall totals across the Central U.S. will range from 1 to 2 inches, with more than 2 inches possible in areas of severe weather development.
In the Southwest, expect another hot and dry day as high pressure remains the dominant weather feature. An excessive heat advisory remains in effect to much of the Southwest as record breaking high temperatures are likely with highs reaching into the lower 100s. Some areas of the deserts may reach over 110 degrees again.
In the East, scattered showers will persist over the Lower Great Lakes, Northeast, and New England as a low pressure system and associated cold front linger over the region. Strong storms could bring heavy rainfall to parts of Maine.
Temperatures in the lower 48 states ranged Saturday from a morning low of 30 degrees at Mt. Washington, N.H., to a high of 106 degrees at Needles, Calif.
Weather Underground: http://www.wunderground.com
National Weather Service: http://iwin.nws.noaa.gov