KEY POINTS:
Gustav, Hanna, Ike - these are all Atlantic storms currently active (and we're still tracking Gustav and Hanna hourly at the Weather Watch Centre) and with Atlantic hurricane season now in full swing we'll hear more names as more and more storms develop.
Here are this year's Atlantic names: Arthur, Bertha, ,Cristobal, Dolly, Edouard, Fay, Gustav, Hanna, Ike, Josephine, Kyle, Laura, Marco, Nana, Omar, Paloma, Rene, Sally, Teddy, Vicky, Wilfred.
Of course in the record breaking hurricane season of 2005 that spawned Hurricane and Rita they used all their names up and had to do something they'd never done before - start all over again!
They used the Greek alphabet - Alpha, Beta, Gamma, Delta, Epsilon and finally, Zeta - all up 27 named storms. This year we're now up to number 9 and there's still quite a way to go - with September and October strong months for hurricane formation. In November they tail off and the hurricane season ends on November 30. Incidentally our Tropical Cyclone season starts Nov 1st and goes until the end of April.
So why name storms? It's basically to make them easier to differentiate from each other - especially when there are multiple storms - and that leads to less confusion.
History of Hurricane Names (from NOAA)
For several hundred years, hurricanes in the West Indies were often named after the particular saint's day on which the hurricane occurred. For example "Hurricane San Felipe" struck Puerto Rico on 13 September 1876. Another storm struck Puerto Rico on the same day in 1928, and this storm was named "Hurricane San Felipe the second."
Later, latitude-longitude positions were used. However, experience has shown that using distinctive names in communications is quicker and less subject to error than the cumbersome latitude longitude identification methods.
Using women's names became the practice during World War II, following the use of a woman's name for a storm in the 1941 novel "Storm" by George R. Stewart. In 1951 the United States adopted a confusing plan to name storms by a phonetic alphabet (Able, Baker, Charlie), and in 1953 the nation's weather services returned to using female names.
The practice of using female names exclusively ended in 1978 when names from both genders were used to designate storms in the eastern Pacific. A year later, male and female names were included in lists for the Atlantic and Gulf of Mexico.
The name lists, which have been agreed upon at international meetings of the World Meteorological Organization, have a French, Spanish, Dutch, and English flavour because hurricanes affect other nations and are tracked by the public and weather services of many countries.
The Tropical Prediction Centre in Miami, FL keeps a constant watch on oceanic storm-breeding grounds. Once a system with anticlockwise circulation (northern hemisphere) and wind speeds of 62km/h or greater is identified, the Centre gives the storm a name from the list for the current year. The letters Q, U, X, Y, and Z are not included because of the scarcity of names beginning with those letters.
Names associated with storms that have caused significant death and/or damage are usually retired from the list - such as Andrew and Katrina.
Oh and another thing I'm asked about - what's the difference between Hurricanes, Typhoons and Cyclones? Well it's where they currently are. Cyclones are southern hemisphere tropical storms that spin clockwise - hurricanes are the same thing (but in the northern hemisphere they spin the opposite way - anticlockwise). Hurricanes only form in the Atlantic Ocean and in the Pacific Ocean east of the International Dateline. Typhoons form in the Pacific Ocean west of the International Dateline. So, let's say we have Hurricane Winston (topical!) and he's in the Pacific Ocean moving west, then crosses the international dateline - he then is called a typhoon.
Confusing? I think so! I wish we called them all hurricanes - that would make far more sense. But I guess to others it's good to have their regions clearly defined.
By the way, in all oceans - before they become a Typhoon, Cyclone or Hurricane - they start off as a Tropical Storm (winds sustained at gale force which is 62km/h - when that doubles to 120km/h they become a Typhoon, Cyclone or Hurricane).
Gustav is now a tropical storm - as is Ike. We are still showing images of Gustav updated hourly at the Weather Watch Centre.
Anyway, on the Atlantic Hurricane radar right now is Hurricane Hanna and Tropical Storm Ike. Ike is the one to watch I think.
I'll update you on Friday - and of course let's not forget our own country! Easy to do when you have so much media attention offshore! We have another low moving in for the weekend - I'm sorry!! Auckland - looks like you're going to be up to 3 whole months of wet weekends. Big sighs all round I'm sure!
For the latest on the US hurricane season and New Zealand's big weekend low - go the Weather Watch Centre.
Philip Duncan
Pictured above: An aerial view shows residents gather in affected area by Hurricane Gustav in Isla de la Juventud, Cuba. AP Photo/Claudia Daut
For the latest weather news keep up to date with The Radio Network's new Weather Watch Centre or the NZ Herald weather section.
