Pineapple Express Triggers Halloween Flooding Across Southwest
Pineapple Express Triggers Halloween Flooding Across Southwest
US · Published Oct 28, 2026
• California and the Southwest are bracing for another round of heavy rain this Halloween weekend as tropical moisture from the remnants of Olana moves in from the Pacific.
• Northern and Southern California could see downpours, while parts of the Sierra Nevada may receive mountain snow.

Why It's Important?

The current weather pattern is particularly concerning given the recent history of severe flooding and the potential implications for the upcoming winter season. The repeated onslaught of heavy precipitation, especially after the destructive floods witnessed in New Mexico and Southern California, highlights the vulnerability of communities to extreme weather events. The strengthening Super El Niño is a significant factor, as it traditionally correlates with wetter conditions across the southwestern United States. This suggests that the current Pineapple Express event may be an early indicator of a prolonged period of increased rainfall and potential for widespread flooding throughout the winter months. Residents in flood-prone areas are urged to stay informed about weather alerts and prepare for potential disruptions and hazards. The accumulation of snow in the Sierras, while beneficial for water resources, also presents avalanche risks and travel challenges.

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