Pacific Ocean To determine the phase of ENSO, the most recent three-month sea surface temperature average for the area approximately to the southeast of Hawaii is computed, and if the region is more than above or below normal for that period, then an El Niño or La Niña is considered in progress. In the tropical western Pacific, the monsoon and the related wet season during the summer months contrast with dry winds in the winter which blow over the ocean from the Asian landmass. Worldwide, tropical cyclone activity peaks in late summer, when the difference between temperatures aloft and sea surface temperatures
NOAA Weather Radio broadcast routine report updated every three hours, which provides an information summary on any active tropical cyclones. Activity summaries for the Atlantic Basin are typically included with stations located in states near the Gulf of Mexico, Caribbean Sea and Atlantic Ocean, while stations along the West Coast receive summaries concerning the Pacific Ocean. Depending on the station and associated Weather Forecast Office, listeners can hear this report at the top and bottom of every hour. NOAA Weather Radio broadcast routine The NOAA Weather Radio All Hazards network has a multi-tier concept for forecasting or alerting the public to all types of weather.