The Cold High-Altitude Depressions system known as DANA Aníbal has triggered persistent coastal drizzles, heavy Andean snowfalls, and high-altitude electrical storms across Peru. Maintained by the Servicio Nacional de Meteorología e Hidrología, alerts remain in effect through August 19, 2026.
How DANA Aníbal Generates Extreme Weather From the Pacific to the Andes
The atmospheric disturbance designated as DANA Aníbal formed over the Pacific Ocean north of Chile, operating as a massive cold-air system positioned between 5 and 10 kilometers above the surface. As this cold air mass advanced toward tropical latitudes, it collided with warmer, humid air coming from the Amazon basin and an unusually warm Pacific Ocean. According to the Senamhi, the DANA is a system that develops in the levels high and medium of the atmosphere, between 5 and 10 kilometers above the surface, especially over the Pacific Ocean near Peru and Chile.
This thermal contrast created widespread atmospheric instability. According to the state forecasting agency, the system delivered solid and liquid precipitation ranging from intense downpours to heavy snow across high-altitude elevations. The Senamhi indicated that the event climatological would develop over the Pacific Ocean, to the north of Chile, and would affect Peru between August 16 and 18. Through a statement, the entity detailed that its proximity to Peruvian territory would favor the occurrence of rain, sleet, hail, and snow in the central and southern sierra, and snow mainly in locations situated above 4,000 meters above sea level.
Es una burbuja de aire muy grande que se extiende a lo largo del Pacífico Sur y esta paulatinamente va ingresando a latitudes tropicales.
Altitude determined the severity and form of the precipitation. In regions exceeding 4,000 meters above sea level, the system produced significant snowfall and sleet. Areas sitting above 2,600 meters experienced rainfall and hail accompanied by electrical storms. The state entity detailed that rains and hailstorms accompanied by electrical discharges would be presented in areas located above 2,600 meters above sea level.
Impacts on Lima Metropolitana and Coastal Districts
In Lima Metropolitana, the interaction manifested as steady, multi-hour coastal moisture rather than isolated downpours. The Senamhi had warned that the increase in moisture and the configuration of winds could favor precipitation on the coast, while maintaining a meteorological warning contemplating the continuity of drizzles of moderate to extreme intensity on the coast until Wednesday, August 19, alongside an increase in wind speed, cloudiness, fog, and mist.
Rosario Julca, Subdirectorate of Meteorological Surveillance via El Comercio Perú, reported that although the intensity is not very high, it is persistent, lasting for more than six hours along the coast of Lima.
Southern Lima districts bore the brunt of the coastal precipitation on Sunday, August 16, 2026. During the afternoon and night of Sunday, August 16, intense precipitation affected different points of Lima, especially in the southern zone, where waterlogging, flooded streets, drainage system problems, and traffic difficulties were reported. Official monitoring stations recorded accumulations while southern Lima experienced aniegos, flooded streets, problems in sewage systems, and difficulties for transit. The government announced the declaration of a state of emergency in Villa El Salvador due to the inundations.
Regional Alerts and Timelines Across Peru
The forecasting agency implemented a list of names starting from 2026 to identify these systems, beginning with Aníbal. The current emergency warnings span multiple departments across the southern and central highlands, with the phenomenon modifying weather conditions from Sunday, August 16, to Tuesday, August 18.
Sierra Sur: Puno, Cusco, Apurímac, Arequipa, Ayacucho, Moquegua, and Tacna faced heavy winds reaching 45 kilometers per hour, nighttime temperature drops, and snow accumulation. The principal effects of the phenomenon concentrated in the southern sierra and central sierra.
Sierra Central: Junín, Huancavelica, Huánuco, and Pasco experienced wind gusts and freeze-thaw precipitation cycles. The Senamhi expected an increase in wind speed in sectors of the sierra, contributing to a greater sensation of cold during the night, while noting that temperature behavior would not be uniform as some zones could register an increase in values during the day due to the atmospheric configuration associated with DANA Aníbal.
Authorities extended the weather advisory through Wednesday, August 19, 2026, advising residents in vulnerable districts to monitor official updates as the cold high-altitude system slowly weakens and moves away from the territory.
