Thursday, 19 February 2009

Calculo

... weeks national hurricane preparedness, 25 - 31 May. ... National Weather Service. Security Tiempo: Huracanes. Weather Radio ...
ACE of a season is calculated as the sum of the squares of each estimate of the maximum sustained speed of tropical cyclones (ie, winds at or above the 35 knots) at intervals of six hours. If any one season ciclon continue activities beyond the limits of the year (the day December 31), ACE of the cyclone is taken into account for the year in which they originated. The figures are generally divided by 10,000 for obtain more manageable numbers. The ACE unit is 104 kn2.
Like this:
where vmax is the sustained wind speed expressed in knots.
The kinetic energy is proportional to the square of the speed and add the energy per time interval is stored energy. By increasing the duration of the cyclone are adding more value and ACE will also increase, so that storms can build up a long term RCTs greater than the shortest, although these are more intense. ACE is a value proportional to the energy of the system. However, it is not a direct calculation of energy (in a real energy calculations appear in the air mass movement and hence the size of the cyclone).
A related quantity is the potential for destruction from Hurricane (PDH) (in English: Hurricane Destruction Potential or HDP), the ECA, but only calculated during the time that the system is classified into the categories of hurricane. - The Weather Network - HURRICANES ... Most hurricanes touched land in September, although this does not mean that ...
This web page contains information for the public in English on Hurricane ... Security Tiempo: Huracanes ... Weather Radio NOAA (NWR) ...
Tornadoes are produced by hurricanes often. The "eye", or quiet ... The Hurricane Center Central Pacific: http://www.weather.gov/cphc ...


Feb 19, 2009 7:05:38 AM

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Weather history Path of Hurricane Wilma. The second week of October 2005, a large and complex area of low pressure developed over the western Atlantic and eastern Caribbean, with several areas of thunderstorms. This area of disturbed weather, southwest of Jamaica, was slowly organizing into a tropical depression within 24 hours on October 15. Subsequently, he became a strong tropical storm at 5 on October 17th EDT (0900 UTC). Hurricane Wilma was the first in history to receive a name beginning with "W" from the alphabetical denomination began in 1950 and tied the record for most storms in a season that had so far in 1933. The mechanism of the storm was a slow moving warm water that was reinforced continuously until it became a hurricane on October 18. This made him the 12th-fifth hurricane of the season and equal the record established in the 1969 season The Wilma began a rapid intensification in the afternoon of day 18, approximately 16 EDT (2000 UTC). From 3:54 EDT (1954 UTC) of day 18 until 2:11 EDT (0611 UTC) of day 19 was measured by a drop in pressure of 78 hPa from 970 hPa to 892 hPa, respectively, over a period of 10 hours. 25 hours later, at 1:56 EDT (0556 UTC) until October 19 at 2:11 EDT (0611 UTC), the pressure fell from 982 to 892 hPa, which means a drop of 90 hPa. At the same time, Wilma strengthened from 110 km / h from a tropical storm to become a powerful category 5 hurricane with winds reaching 280 km / h. Note: The Atlantic Hurricane Gilbert (1988) had a drop of 3 hPa / h from 960 to 888 hPa within 24 h. Hurricane Wilma at 11:55 a.m. local time (EDT) on October 18, 2005. On October 21, Wilma made...
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