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The Joint Typhoon Warning Center ( JTWC) is a joint United States Navy – United States Air Force command in Pearl Harbor, Hawaii. The JTWC is responsible for the issuing of tropical cyclone warnings in the North-West Pacific Ocean, South Pacific Ocean, and Indian Ocean for all branches of the U.S. Department of Defense and other U.S. government agencies. Their warnings are intended primarily ...
By the next day, the Joint Typhoon Warning Center (JTWC) issued a Tropical Cyclone Formation Alert on the system, citing the slightly favourable environmental conditions encompassing poleward outflow and warm sea surface temperatures (SST) of 29–30 °C (84–86 °F) subduing high vertical wind shear. [2]
By November 6, the Joint Typhoon Warning Center (JTWC) assessed the system as a Category 5-equivalent super typhoon on the Saffir–Simpson hurricane wind scale (SSHWS); the storm passed over the island of Kayangel in Palau shortly after attaining this strength.
These classifications are Tropical Depression, Tropical Storm, Typhoon, and Super Typhoon. [17] The United States' Joint Typhoon Warning Center (JTWC) unofficially classifies typhoons with wind speeds of at least 130 knots (150 mph; 240 km/h)—the equivalent of a strong Category 4 storm on the Saffir–Simpson scale —as super typhoons. [18]
The disturbance, initially designated as 93W, was eventually upgraded the following day to a tropical depression by the Joint Typhoon Warning Center (JTWC) and re-designated as 26W.
The Joint Typhoon Warning Center (JTWC) estimated 1-minute sustained winds of 270 km/h (165 mph) at Freddy's peak strength, equivalent to Category 5 strength on the Saffir–Simpson scale. On 19 February, Météo-France (MFR) upgraded it to a very intense tropical cyclone, estimated 10-minute winds of 220 km/h (140 mph).
At 06:00 UTC of September 5, the United States Joint Typhoon Warning Center (JTWC) [nb 1] started to monitor a tropical disturbance in the Philippine Sea , located about 446 nmi (513 mi; 826 km) to the east-southeast of Legazpi, Albay.
On October 2 at 06:00 UTC, the United States Joint Typhoon Warning Center (JTWC) [nb 1] started to monitor a persistent area of convection in the Philippine Sea, located 495 nautical miles (917 km; 570 mi) to the east of Davao City, Philippines. At that time, satellite visible imagery revealed a disorganized but broad area of circulation with flaring strong thunderstorms. Later analysis by the ...