Weather Underground Forecast for Saturday, May 04, 2013.
Precipitation continues for the Mississippi River Valley and Eastern Valleys on Saturday as a strong low pressure system continues pulling moisture in from the Gulf of Mexico. This will allow for rain showers to persist from the Gulf of Mexico through the Ohio River Valley and into the Upper Midwest. Some areas will see isolated thunderstorms, but severe thunderstorm development is not anticipated. Flooding, however, will remain a great concern for the Midwest as this system maintain dangerous flood levels for the Lower Ohio River and the Mid- to Lower Mississippi River.
East of this system, a ridge of high pressure over the Northeast will hold firm, which will keep moisture out of the region. This will allow for another sunny day with warm and pleasant temperatures.
Behind this system, in the West, a trough of low pressure over western Canada will slide southeastward into the Northern Rockies on Saturday. While moisture is limited with this system, it will produce a few scattered rain showers across the Intermountain West and the Northern Rockies, moving into the Great Basin throughout the day. Snow are possible with this system at highest elevations. Elsewhere in the West, high pressure over California and the Southwest will maintain dangerous fire weather conditions, especially across southern California and Arizona. Low humidity, gusty winds, and hot temperatures will allow for rapid fire spread and creates unmanageable fire management.
Temperatures in the Lower 48 states Friday have ranged from a morning low of 12 degrees at Alamosa, Colo. to a high of 95 degrees at Fullerton, Calif.