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 >

Increasing southerly winds gusting from 25 to 40 mph today will usher in hotter temperatures, especially over central SD where readings will rise into the upper 90s to low 100s. A Heat Advisory is in effect today for areas west of the Missouri River, where temperatures and heat indices will rise to 100-105 degrees. High to Very High fire danger will also be in place over central SD due to the strong south winds and humidity ranging from 20 to 30 percent.