Shelf Cloud Spotted Over Tlalpan, Mexico City Before Storm

A rare shelf cloud (nube estante) was observed over the Tlalpan borough of Mexico City on July 13, 2026, ahead of a severe thunderstorm. The phenomenon, characterized by a low, horizontal cloud formation, brought wind gusts exceeding 100 km/h and heavy rain. Source: heraldomx The cloud, also known as a nube cinturón, is a meteorological effect that typically occurs in mountainous areas when warm, moist air is forced upward by an obstacle. Source: heraldomx

According to reports, the shelf cloud forms at the leading edge of a storm when cold air descending from the storm pushes warm, humid air near the surface, causing condensation. Source: excelsiormx Despite its ominous appearance, a shelf cloud is not a tornado; it does not rotate or descend as a funnel. Source: excelsiormx However, it signals the arrival of intense rain, strong winds, lightning, and possible hail. Authorities recommended avoiding shelter under trees, poles, or unstable structures due to the strong wind gusts. Source: heraldomx The event was captured on video and shared widely on social media, drawing attention to this impressive but potentially dangerous weather phenomenon.