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Storms that form over the Atlantic Ocean or central and eastern North Pacific are called "hurricanes" when their wind speeds reach at least 74 miles per hour (119 kilometers per hour). Up to that ...
Depth of 26 °C isotherm on October 1, 2006. There are six main requirements for tropical cyclogenesis: sufficiently warm sea surface temperatures, atmospheric instability, high humidity in the lower to middle levels of the troposphere, enough Coriolis force to sustain a low-pressure center, a preexisting low-level focus or disturbance, and low vertical wind shear. [3]
The 2024 Atlantic hurricane season has come to an end, and it brought a number of particularly damaging storms. Climate change is not thought to increase the number of hurricanes, typhoons and ...
The National Hurricane Center declared Helene a hurricane Wednesday morning, likely to strengthen as it moves over the Gulf of Mexico over the next day. By Thursday night, the storm is slated to ...
Tropical cyclone forecasting is the science of forecasting where a tropical cyclone's center, and its effects, are expected to be at some point in the future. There are several elements to tropical cyclone forecasting: track forecasting, intensity forecasting, rainfall forecasting, storm surge, tornado, and seasonal forecasting.
A Category 4 hurricane has winds of 113 to 136 kn (130 to 157 mph; 209 to 252 km/h), while a Category 5 hurricane has winds of at least 137 kn (158 mph; 254 km/h). [ 1 ] [ 3 ] A post tropical cyclone is a system that has weakened, into a remnant low or has dissipated and formal advisories are usually discontinued at this stage. [ 1 ]
Debby landed as a hurricane and became a tropical storm; here's what makes the difference. Since hurricanes need water around 80 degrees Fahrenheit to form, one might suspect that warming ...
— The HWRF provides operational guidance for forecasters at the National Hurricane Center in both the North Atlantic and East Pacific basins. Hurricane forecasts are produced on demand every six hours at 00, 06, 12, and 18 UTC for up to four tropical storms at a time. The HWRF hurricane model graphics are available at six-hour increments up ...