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Here is the five-day track for Ophelia as of 11 a.m. EST Sept. 15. This slow-moving storm has taken unpredicted turns.
Typically, peak hurricane season lasts from the end of August to mid-September, when water temperatures rise above 82 degrees (as indicated by the orange highlight). This NASA map of water temperatures tracked during Hurricane Katrina shows why that storm picked up intensity over the Gulf of Mexico and why Ophelia gained strength in the Atlantic Ocean.
Hurricane Ophelia as seen from a window in the International Space Station.