Short, intense storms gain intensity across Hawaiʻi | HappeningNow.news

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Short, intense storms gain intensity across Hawaiʻi

The red lines indicate the physiographic division of windward (northeast) and leeward (southwest) regions on the islands. Journal of Climatology (2026).

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A new study by University of Hawaiʻi at Mānoa researchers finds that, despite an overall drying trend, short, intense downpours that trigger flash floods are becoming stronger across the islands. Analyzing 50 years of hourly rainfall data from 117 gauges on Kauaʻi, Oʻahu, Molokaʻi, Maui and Hawaiʻi Island, the researchers identified climate trends that are missed by conventional 24‑hour averages. The findings were published in the International Journal of Climatology, marking the first comprehensive assessment of extreme hourly rainfall patterns in Hawaiʻi.

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