Unstable weather conditions and rising humidity are arriving across the Buenos Aires Metropolitan Area (AMBA) ahead of late August, accompanied by an approaching deep partial lunar eclipse, according to meteorological forecasts from Meteored Argentina. Temperatures are shifting away from the polar air mass that marked the previous weekend, bringing warmer afternoon highs and incoming rainfall before clear skies potentially return for the astronomical event.
Temperature and Humidity Rise Across AMBA
According to Meteored Argentina, a shift in wind direction toward the north and northeast is driving a warmer, more humid air mass into the region. After a cool start to Wednesday, August 26, afternoon temperatures across the Buenos Aires Metropolitan Area are expected to reach between 18 °C and 20 °C. Cloud cover will increase throughout the day, and meteorologists note that isolated showers and light drizzle could develop by late evening as instability builds across parts of the region.
Forecast for Rain Ahead of the Lunar Eclipse
Precipitation chances increase significantly during the early morning and daytime hours of Thursday, August 27, according to Meteored Argentina. Winds will rotate from the southeast and south without triggering a sharp drop in temperature. Computer forecast models, including the ECMWF and GFS systems cited by Meteored Argentina, project morning lows near 12 °C and afternoon highs reaching 17 °C to 18 °C on Thursday. While the instability lacks the intensity required for severe weather alerts, localized storm development remains possible.
Meteorologists emphasize that while this late-August rainfall coincides temporally with the traditional folklore surrounding the “Santa Rosa storm” (associated with the commemoration of Santa Rosa de Lima on August 30), scientific data shows no causal link between the historical legend and meteorological events in Argentina.
Timing and Visibility for the Partial Lunar Eclipse
Weather conditions are expected to begin improving late Thursday night, potentially clearing enough cloud cover for visibility during the deep partial lunar eclipse occurring between the night of August 27 and the early hours of August 28, according to data from Time and Date and Meteored Argentina. The celestial event will be visible to the naked eye across South America.
According to trajectory models from Time and Date, the penumbral eclipse begins at approximately 22:24 HOA on August 27, with the peak of the umbral phase occurring at 01:13 HOA on Friday, August 28. At its maximum, more than 90 percent of the lunar disk will pass through Earth’s shadow, casting a coppery-orange hue across the Moon. Forecasters at Meteored Argentina indicate that cloud cover over the AMBA region is expected to decrease by the time of the peak, offering a viable window for observation alongside temperatures ranging between 12 °C and 14 °C.