A map showing the vertical wind forecast from the WRF-ROMS model at an altitude of 5 kilometers above sea level, illustrating the vertical movement of air (unit: km/h). Positive values (warm colors such as orange and red) indicate upward air currents, which are key factors promoting cloud formation and rainfall. Negative values (cool colors such as blue and purple) indicate descending air currents, which inhibit cloud formation and lead to clear sky.