Dennis was a C3 tropical cyclone that formed in the Gulf of Mexico in 2005. The storm reached maximum sustained winds of 241 km/h (130 kt) with a minimum central pressure of 930 hPa. Tracking across the Gulf of Mexicoin the North Atlantic basin (, it potentially affected the US Gulf Coast, Mexico and Cuba. The storm traveled from approximately 12.0°-89.2° to 45.8°-60.8°, crossing a range of 34 latitude and 28 longitude.