"Alvin" Bring Strong Wind and Heavy Rain to West Coast of Mexico

Tropical Storm "Alvin" in the northeastern Pacific is expected to move northward at a speed of 15-20 km/h with little change in intensity (Figure 1). Affected by this storm, from May 31 to June 2, parts of the Mexican states of Nayarit, Jalisco, Colima, Michoacán, Baja California Sur, and Sinaloa will experience moderate to heavy rainfall, with localized torrential rain or downpour (Figure 2). These regions will also be subjected to strong winds of 13-23 m/s on the Beaufort scale, with gusts reaching 25-31 m/s. Continuous monitoring of the tropical storm's strong winds and high waves is advised, along with precautions against potential secondary disasters.

Figure 1: Satellite Infrared Detection Image (BT, 10:00 AM, May 31, 2025)

Figure 2: Forecast of 24-hour rainfall (shaded, units: mm), 850 hPa wind field (wind barbs, units: m/s), and 500 hPa geopotential height field (contours, units: dagpm) at 20:00 (BT) on May 31, 2025

Author: Yang Jing, Cao Mai                                       Reviewer: Guan Yue 

English reviewer:Wang Yi                                                                       Issue approver:Dai Kan