National Weather Service United States Department of Commerce

Heavy Rain in the Ohio and Tennessee Valleys; Watching for Tropical Cyclone Development in the Atlantic

Heavy to excessive rainfall may bring areas of flash and urban flooding over portions of the Ohio and Tennessee Valleys. Two tropical waves in the Atlantic are being monitored for tropical cyclone formation within the next few days. One tropical wave will bring periods of heavy rain, thunderstorms, flood risk, and landslides to Puerto Rico and the US Virgin Islands through Friday morning. 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.