Hurricane Oscar developed on Saturday near Turks and Caicos, and to the northeast of Cuba, in the extreme southwestern Atlantic Ocean. As of Saturday evening, hurricane-force winds extended just 5 miles (8 km) from the center of the storm. //

Oscar was so small that its winds could not be detected by Earth-observation satellites that estimate wind speeds in tropical cyclones.

Writing in his summary of Oscar's development on Saturday afternoon, National Hurricane Center forecaster Philippe Papin noted that the hurricane was only discovered due to a last-minute flight by Air Force Hurricane Hunter aircraft.

"It is fair to say its been an unexpected day with regards to Oscar," he wrote in his 5 pm ET advisory. "After being upgraded to a tropical storm this morning, a resources-permitting Air Force Reconnaissance mission found that Oscar was much stronger than anticipated and in fact was a tiny hurricane. It is worth noting that remote sensing satellite intensity estimates are currently much lower." //

The Air Force aircraft found sustained winds, in a tiny area to be sure, of 85 mph (137 kph). Hence, Hurricane Oscar. //

Weather models struggle with the development of small hurricanes, and this is largely because the micro-physics of the smallest storms occur below the resolution of these models. Additionally, tiny hurricanes organize much more quickly and efficiently.