This eBook edition begins with hurricane basics and teaches you how to forecast wind direction and strength as well as track the eye of the storm.
Hurricane Katrina Extreme Footage
Life can exist on Earth because it has a temperature range suitable for its development. Parts of Nature’s ingenious plan to provide this ideal mix include: an appropriate distance from the Sun, Earth’s rotation, a tilt of the Earth’s axis creating the seasons, and tropical cyclones, called hurricanes in the North Atlantic Ocean.
Water can exist as liquid or gas. Transforming water to its’ gaseous form (vaporization) requires large amounts of heat from it’s’ surroundings. When water vapor shifts back to rainwater (condensation) that heat-energy is released. Hurricanes move immense amounts of heat-energy from tropical waters to cool temperate zones through these physical changes and also convert salt water to drinkable rainwater for a thirsty world. These storms can cause great damage but pay for their keep by stirring the atmospheric soup.
Hurricanes originate as tropical waves pouring off African deserts; a new one appears about every three days in the height of the hurricane season. They become tropical depressions when the mass of hot-moist air shaped like a three hundred-mile long fat cigar, squashed as if stepped on, begins rotating in a counterclockwise direction, often in mid-ocean but anywhere favorable conditions occur. Opposing winds in the migrating Inter Tropic Convergence Zone (ITCZ) begin turning it, aided by the Coriolis Effect. As the growing storm rotates it draws water vapor from an ocean whose temperature must be at least 79-degrees Fahrenheit and becomes self-sustaining. When winds reach 40-miles per hour (34-knots) the tropical depression becomes a tropical storm and grows into a hurricane when they reach 75-miles per hour (64 knots.)
To learn more start with those italicized concepts above.
Do you have a different view of hurricanes now? Perhaps not if you live in a hurricane zone but without them life might not thrive on Earth as it does now. However your HURRICANE-FINDER™ will help you deal with them in a more organized way.
This instrument has been manufactured to show the dynamics of a hurricane depending on forecasted information over which we have no control. Therefore, the company does not guarantee accuracy and cannot be held liable for damages occurring as the result of decisions made based on information gained through use or misuse of this product.
Because a hurricane’s winds are rotational their right and left halves (semicircles) have different characteristics. Imagine a silver dollar face down on a flat surface (your hurricane on a table.) While turning it counterclockwise move it forward. Picture a line along its track. Continue that line back through the coin’s center creating a left and right side. If the counterclockwise winds are 100 and the speed of forward movement 20, the 20 is added in the right semicircle creating an actual wind of 120. In the left semicircle winds are consequently reduced by 20 making it only 80. As in most things this is not a hard and fast rule and sometimes winds may be stronger in the left semicircle due to local conditions or simply because of the unpredictable nature of hurricanes. The right side of the hurricane is called the dangerous semicircle, its left the navigable semicircle.
Accepted practice is to steer away from the hurricane’s track keeping the wind on your right. If you were sailing you would be on a starboard tack in each semicircle due to the circular nature of cyclonic storm’s winds, the right-of-way position. When in doubt of the storm’s track sail on a starboard tack or if motoring keep the wind on the starboard side. In the dangerous semicircle heaving to on the starboard tack might be the most expedient maneuver. Keeping the wind on the starboard quarter in the navigable semicircle would take you away from the eye most quickly. All of these maneuvers depend on the proximity of land and careful navigation is mandated.
Wilma formed and became an extremely intense hurricane over the northwestern Caribbean Sea. It had the all-time lowest central pressure for an Atlantic basin hurricane, and it devastated the northeastern Yucatan Peninsula. Wilma also inflicted extensive damage over southern Florida. more ....
By JESSICA GRESKO, Associated Press Writer Fri Mar 16, 5:06 PM ET
MIAMI - Certain hurricane forecasts could become less accurate if a key weather satellite that is already beyond its expected life span fails, the nation's new top forecaster said Friday.
The change would mean placing longer stretches of coastline under warnings and asking more people to evacuate, National Hurricane Center Director Bill Proenza said.
In an interview with The Associated Press, Proenza also called for hundreds of millions of dollars in new funding for expanded research and predictions.
Proenza, who took the post in January, said his immediate concerns include the so-called QuikScat weather satellite, which lets forecasters measure such basics as wind speed. Replacing it would take at least four years even if the estimated $400 million cost were available immediately, he said.
The satellite, designed to last five years, is in its seventh year of operation, Proenza said, and it is only a matter of time until it fails. He said he did not know of any plans to replace it.
Without its data, two-day forecasts could become 10 percent less accurate, and the three-day predictions could lose 16 percent accuracy, Proenza said.
Average track errors last year were about 100 miles on two-day forecasts and 150 mites on three-day predictions. Track errors have been cut in half over the past 15 years, but losing QuikScat could erode some of those gains, Proenza said.
Dear American Citizen:
The following is a Public Announcement concerning Hurricane Season. Please contact the American Citizen Services section via e-mail (email@example.com), fax (2326-4655), or telephone (2326-4405) if you have any questions.
Estimados Ciudadanos Americanos:
A continuación encontrará un boletín informativo publicado con relación a la temporada de huracanes. Si tiene alguna pregunta se puede comunicar con la Sección de Servicios Americanos a la siguiente dirección de correo electrónico ( firstname.lastname@example.org) fax (2326-4655) o al teléfono (2326-4405).
1. This Public Announcement is being issued to alert U.S. citizens to the Hurricane Season in the Atlantic and Pacific Oceans, the Caribbean, and the Gulf of Mexico. The official Atlantic Hurricane Season runs from June through November. This Public Announcement expires on December 7, 2007.
2. Experts at the National Weather Service predict a 75 percent chance that activity during the 2007 Atlantic Hurricane Season will be above normal this year, forecasting 13 to 17 named storms, with 7 to 10 becoming hurricanes. The National Oceanic and Atmospheric Administration recommends that those in hurricane-prone regions begin preparations at this time for the upcoming season. more ...