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Watches are issued 36 hours prior to a tropical cyclone making landfall. Warnings are issued 24 hours prior to the tropical cyclone making landfall. If sustained winds 70 km/h and/or gusts 90 km/h or stronger are predicted, a conventional wind warning will be issued along with the tropical cyclone watches and warnings.
No. 1 signal is an advisory signal for when there is a tropical cyclone centred within about 800 kilometres of Hong Kong. If strong winds are not expected within 24 hours, the issuance of the signal may be delayed. In very rare cases, the signal may be issued when a tropical cyclone is still beyond 800 km from Hong Kong.
The Tropical Cyclone Warning Signal was then renamed "Tropical Cyclone Wind Signal" in 2019 to emphasize that this warning system is based on tropical cyclone wind intensity rather than rains, flash floods and landslides (for which other weather warning systems, particularly the PAGASA Heavy Rainfall Warning System, are already in place). [4] [23]
Storm surge and hurricane warnings were issued Tuesday for Florida's Gulf Coast as Tropical Storm Helene started gaining strength on the path to what's expected to become a massive and powerful ...
On Wednesday afternoon, the NHC designated the tropical rainstorm as Potential Tropical Cyclone 19. A tropical storm watch was issued for northeastern Nicaragua and a tropical storm warning and ...
The National Hurricane Center has issued tropical storm watches and warnings for the southernmost reaches of Florida and areas of the west coast after upgrading the system it has been watching all ...
A tropical storm warning has been posted for parts of the North Carolina and mid ... dubbed Potential Tropical Cyclone 16 by the National Hurricane Center, currently has 35 mph winds off the east ...
At 00:00 UTC the following day, the Japan Meteorological Agency (JMA) classified the system as a tropical depression, [2] and by 03:00 UTC, the United States Joint Typhoon Warning Center (JTWC) issued a tropical cyclone formation alert for the disturbance, citing a favorable environment for development characterized by low to moderate vertical ...