PUERTO VALLARTA – Residents and tourists in Puerto Vallarta are bracing themselves for searing heat, as temperatures are expected to soar up to 35 degrees in the shade, potentially feeling like a scorching 40 degrees or more. This alarming weather update comes after an atmospheric event named “Dorsal.”
According to meteorologist Víctor Manuel Cornejo López, the Dorsal phenomenon results from dry air entering the atmosphere. Since the morning of Tuesday, September 12, a swath of this dry air has blanketed the Mexican Republic from northeast to southwest.
“The dryness originates from the Gulf of Mexico. In meteorology, while low pressures are referred to as troughs, this specific event is termed Dorsal,” Cornejo López elaborated. “Though I don’t foresee this lasting long, the atmosphere is experiencing relatively dry conditions, allowing solar radiation to strike directly. This results in the intense heat we are witnessing.”
The meteorologist further emphasized the dramatic spike in solar and ultraviolet radiation, with levels reaching an index of 10 or 11. To provide context, any reading above eight is considered unfavorable.
“This surge in solar radiation is primarily due to the Dorsal effect. Consequently, with fewer clouds ushered in from the Pacific, there’s more spacing between rain events,” Cornejo López stated.
He explained the impending heatwave: “Given the prevailing conditions, we can expect these high temperatures for at least two to three more days. Regions could experience 35 or 36 degrees in the shade, but due to variations in humidity, the thermal sensation might very well exceed 40 degrees.”
Given the current circumstances, officials and health experts are urging residents and visitors to be cautious. Recommendations include applying sunscreen generously, refraining from prolonged exposure to the sun, and ensuring adequate hydration throughout the day.
