How much rain fell in Hawaii during March?

An estimated 7.5 trillion liters (2 trillion gallons) of water fell across Hawaii during March due to back-to-back storm systems.

What caused the heavy rainfall in Hawaii?

Hawaii experienced heavy rainfall from a series of seasonal low-pressure systems known as Kona lows.

Did the heavy rains cause flooding and evacuations in Hawaii?

Yes, the persistent heavy rain led to destructive flooding on several islands, forcing thousands of people to evacuate their homes.

Home / Environment / Hawaii Drenched: 2 Trillion Gallons of Rain Fall

Hawaii Drenched: 2 Trillion Gallons of Rain Fall

5 Apr

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Summary

Over 7.5 trillion liters of water fell across Hawaii in March.
Statewide average rainfall was over two-and-a-half times normal.
Flooding forced thousands to evacuate homes on several islands.

Hawaii Drenched: 2 Trillion Gallons of Rain Fall

Hawaii endured relentless deluges throughout March, with back-to-back storm systems dropping an estimated 7.5 trillion liters (2 trillion gallons) of rain. The storms, characterized by seasonal Kona lows, brought moisture-packed southerly winds that saturated the islands for days at a time.

The statewide average rainfall for March reached approximately 463.5 mm, significantly exceeding the typical March average of 174 mm. Some locations experienced rainfall exceeding 1,500 mm, and one station near Honolulu recorded nearly 500 mm in a single 24-hour period.