Mario Gómez Ramírez
DOI: 10.59427/rcli/2025/v25.032-045
Tropical cyclones are intense marine phenomena that can cause severe damage when they impact both continental and marine environments, but it is unfortunate when they cause loss of life. During the hot days of April, the media generated anticipation well in advance regarding the formation of the first tropical cyclone of the 2025 season in the Northeast Pacific. It is known that the tropical cyclone season in this basin begins on May 15th each year, and thirteen days later, the long-awaited first cyclone system formed. Through monitoring and analysis of daily SST and SSTA maps from Tropical Tidbits and Meteorological bulletins issued by the National Meteorological Service of Mexico, the SST values followed by Tropical Storm “Alvin” are shown. DT-1-E formed as an instability zone along a monsoon trough located at coordinates 11.9° LN and 104.7° LW, with maximun winds off 55 km/h and an atmospheric pressure of 1006 mb, in an área with a high SST concentration of 31 °C sourthwest of the Gulf of Tehuantepec. The following day, as it moved north, it evolved into Tropical Storm “Alvin” with and SST of 29 °C to 28.5 °C. On the 30 th, it continued heading northeast and showed changes in the intensity of its maximun winds and a SST variation of 3.5 °C. However, on the 31st, as it ascended to a higher latitude, it entered a zone of cooler waters of 24 °C, enough to weaken “Alvin” to a tropical depression and at 9:00 a.m. local time it was declared a post-tropical cyclones of the remnant low type until it dissipated a midnight of the same day.
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