What is a Hurricane?
A hurricane is a type of tropical cyclone, which is a generic term for a low pressure system that generally forms in the tropics. The cyclone is accompanied by thunderstorms and, in the Northern Hemisphere, a counterclockwise circulation of winds near the earth's surface. Tropical cyclones are classified as follows:
An organized system of clouds and thunderstorms with a defined surface circulation and maximum sustained winds of 38 mph (33 kt) or less. Sustained winds are a 1-minute average wind measured at about 33 ft (10 meters) above the surface. While 1 knot = 1 nautical mile per hour or 1.15 statute miles per hour and is abbreviated as "kt".
An organized system of strong thunderstorms with a defined surface circulation and maximum sustained winds of 39-73 mph (34-63 kt)
An intense tropical weather system of strong thunderstorms with a well-defined surface circulation and maximum sustained winds of 74 mph (64 kt) or higher
Hurricanes are categorized according to the strength of their winds using the Saffir-Simpson Hurricane Scale. A Category 1 storm has the lowest wind speeds, while a Category 5 hurricane has the strongest. These are relative terms, because lower category storms can sometimes inflict greater damage than higher category storms, depending on where they strike and the particular hazards they bring. In fact, tropical storms can also produce significant damage and loss of life, mainly due to flooding.
When the the winds from these storms reach 39 mph (34 kts), the cyclones are given names. Years ago, an international committee developed names for Atlantic cyclones (The History of Naming Hurricanes). In 1979 a six year rotating list of Atlantic storm names was adopted — alternating between male and female hurricane names. Storm names are used to facilitate geographic referencing, for warning services, for legal issues, and to reduce confusion when two or more tropical cyclones occur at the same time. Through a vote of the World Meteorological Organization Region IV Subcommittee, Atlantic cyclone names are retired usually when hurricanes result in substantial damage or death or for other special circumstances.
(Thanks to the NHC.)
Hurricane & Tropical Storm
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Active tropical cyclones in the Atlantic, Caribbean, and the Gulf of Mexico
Atlantic Tropical Weather Outlook
ABNT20 KNHC 292346
TROPICAL WEATHER OUTLOOK
NWS NATIONAL HURRICANE CENTER MIAMI FL
800 PM EDT FRI JUL 29 2016
For the North Atlantic...Caribbean Sea and the Gulf of Mexico:
A tropical wave located about 1000 miles east of the Lesser Antilles
is moving westward at 20-25 mph. Associated shower activity is
poorly organized, and given the fast motion of the system any
development should be slow to occur. Regardless of development,
this system will likely bring showers and gusty winds to portions of
the Leeward Islands, Virgin Islands, Puerto Rico, and the eastern
Caribbean Sea during the weekend. By the middle of next week, the
wave is expected to be in the western Caribbean Sea, where
conditions could become more conducive for development.
* Formation chance through 48 hours...low...10 percent
* Formation chance through 5 days...low...30 percent
Shower and thunderstorm activity associated with a tropical wave and
a low pressure system centered a couple of hundred miles south of
Cabo Verde continues to show signs of organization. Although this
system does not have a well-defined circulation at this time, some
development is still possible during the next day or two before the
disturbance encounters a less favorable environment over the central
tropical Atlantic early next week.
* Formation chance through 48 hours...medium...40 percent
* Formation chance through 5 days...medium...50 percent
There are no tropical cyclones at this time.
-No tropical cyclones as of Fri, 29 Jul 2016 23:59:00 GMT