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Monitoring Tropical Cyclones

July 31, 2019

Tropical cyclones (hurricanes) are monitored by National Oceanic and Atmospheric Administration (NOAA). Cyclones that develop in the Eastern Pacific are monitored by the National Hurricane Center. Storm tracking continues until the storm crosses the 140 Degrees West Longitude when the responsibilities shift to the Central Pacific Hurricane Center (CPHC).

The Central Pacific Hurricane Center (CPHC) is co-located with the National Weather Service Forecast Office in Honolulu on the University of Hawaii, Manoa campus. The CPHC issues tropical cyclone warnings, watches, advisories, discussions, and statements for tropical cyclones between 140 Degrees West Longitude to the International Dateline.

The hurricane season in the Pacific officially begins on June 1 and ends on November 30, however tropical cyclones can and do occur year round. The National Weather Service Forecast Office in Honolulu activates the CPHC when:

– A tropical cyclone moves into the Central Pacific from the Eastern Pacific

– A tropical cyclone forms in the Central Pacific

– A tropical cyclone moves into the Central Pacific from the West.

During Central Pacific tropical cyclone events, bulletins are regularly scheduled every six hours: 1500Z/0500HST, 2100Z/1100HST, 0300Z/1700HST, and 0900Z/2300HST. When significant changes take place and/or a tropical cyclone watch or warning is in effect, intermediate bulletins are issued with the latest positions and forecasts.

If you want information about any tropical cyclone, go to:

Tropical Cyclone Advisories

Tropical Weather Outlook

Audio/Podcasts

About Advisories

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