2017 Atlantic Hurricane Season Fast Facts

Hurricanes: What you don't know
Hurricanes: What you don't know

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Hurricanes: What you don't know 01:26

(CNN)Here is a look at the 2017 Atlantic hurricane season.

Facts:
The 2017 Atlantic hurricane season runs from June 1 to November 30. The areas covered include the North Atlantic Ocean, Gulf of Mexico and the Caribbean Sea.
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Preparing for a hurricane
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The National Weather Service defines a hurricane as "an intense tropical weather system with well-defined circulation and sustained winds of 74 mph (64 knots) or higher."
Hurricanes are rated according to intensity on the Saffir-Simpson Hurricane Wind Scale.
The 1-5 scale estimates potential property damage.
A Category 3 or higher is considered a major hurricane.
The National Hurricane Center advises preparedness:
A hurricane watch indicates the possibility that a region could experience hurricane conditions within 48 hours.
A hurricane warning indicates that sustained winds of at least 74 mph are expected within 36 hours.
Predictions:
April 6, 2017 -
The Tropical Meteorology Project from Colorado State University predicts that the "2017 Atlantic basin hurricane season will have slightly below-average activity." They predict a total of 11 named storms and four hurricanes.
Tropical Storm Arlene
April 20, 2017 -
Tropical Storm Arlene forms in the central Atlantic Ocean. According to the National Hurricane Center, April tropical storms are rare, and this is only the second one (the first was 2003's Tropical Storm Ana) since the use of satellite.
April 21, 2017 - Arlene moves southwest and south until it dissipates.
Bret
Cindy
Don
Emily
Franklin
Gert
Harvey
Irma
Jose
Katia
Lee
Maria
Nate
Ophelia
Philippe
Rina
Sean
Tammy
Vince
Whitney