Original: Unexpectedly, Epsilon strengthened again on December 2 and became a hurricane over cooler waters averaging 21   24°C (70   75°F) and continuing shear, conditions that are highly unfavorable to maintaining a tropical cyclone.
Simplified: Unexpectedly, Tropical Storm Epsilon strengthened again on December 2 and became a hurricane over cooler waters about 21 24°C (70 75°F) with continuing wind shear; which are the conditions that are highly unfavorable for a regular tropical cyclone.