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 >

12-hour helicity forecast

 

Figure 9: ETA model derived sounding for Miami valid
at 1200 UTC May 12, 1997.

 

18-hour helicity forecast

 

Figure 10: ETA model derived sounding for Miami valid
at 1800 UTC May 12, 1997.