National Weather Service United States Department of Commerce

Heat Across the Center of the Nation; Severe Thunderstorms Across the Great Lakes and Ohio Valley

Heat expands across the Desert Southwest, Plains, Mississippi Valley and Midwest into Monday. Fire weather concerns continue for portions of the Intermountain West. Active monsoonal moisture fuels thunderstorms over the Southwest with possible flash flooding. Tropical cyclone Fausto in the Pacific, should weaken as it approaches Hawaii; Dangerous surf, swells and rip currents are expected. Read More >

High pressure will start building in overnight and cause clouds to decrease.  This decrease in cloud cover, along with the colder air from yesterday's cold front, will cause temperatures to drop below freezing tonight.  Almost the entire forecast area will wake up to temperatures below 32F.  However, a quick warm-up is in store with high temperatures rebounding to the 60s for a lot of valleys. The weather looks fairly benign through much of the week with the next chance for any significant precipitation on Thursday.