Weather Underground Forecast for Sunday, September 01, 2013.
Two areas of low pressure will bring active weather to the East on Sunday, while scattered storms will also persist in the West. A low pressure system over the Northeast will continue pushing a front slowly southeastward, bringing scattered showers and thunderstorms to the Eastern states from the Northeast through the Eastern valleys, and into the Southeast and Gulf states. At the same time, a low pressure system slides across the Great Lakes, pushing another cold front over the upper Midwest and into the Midwest and Ohio River valley. The tail end of this front may reach into the central Plains, triggering areas of scattered storms. These two areas of low pressure will slowly merge over the East by Sunday evening. Thus, expect scattered showers and thunderstorms to pop up across most of the Eastern third of the nation on Sunday. However, severe thunderstorm development is not anticipated across the region.
Meanwhile out West, moisture lingering over the Southwest will maintain shower and thunderstorm activity from southern California, across the desert Southwest, and into the Central and Southern Rockies. Expect flooding to remain a concern for these areas, especially desert locations as dry surface conditions can not readily absorb periods of heavy rainfall, easily causing areas of flash flooding. Flood advisories will remain in effect for much of the region.
Temperatures in the Lower 48 states Saturday have ranged from a morning low of 32 degrees at Stanley, Idaho to a high of 107 degrees at Hugo, Okla.