Hurricane Flossie was a powerful Pacific tropical cyclone that brought squally weather and light damage to Hawaii in August 2007.

Tracking generally west-southwestward, the storm entered a stage of rapid deepening on August 10, despite forecasts of an only marginally favorable environment.

With cooler sea surface temperatures and high wind shear in its path, the hurricane weakened steadily, deteriorating to a tropical depression by August 16.

However, impact was negligible; the peak wind gust on the Big Island of Hawaii reached 39 mph (63 km/h), and rainfall totals remained below 6 inches (150 mm).

The formation of Hurricane Flossie is attributed to a poorly defined tropical wave that emerged off the western coast of Africa and into the eastern Atlantic Ocean on July 21.

The wave crossed Central America and entered the eastern Pacific on August 1, where it was met with a much more favorable atmospheric environment for organization and intensification.

"[7] By the pre-dawn hours of August 14, however, the cyclone began to feel the impacts of increasingly cool sea surface temperatures and higher southerly wind shear.

[8] An aircraft reconnaissance flight into the system revealed surface winds of 122 mph (196 km/h) and warming cloud tops, and Flossie was downgraded to a Category 3 hurricane.

Governor Linda Lingle declared a state of emergency for the Island of Hawaii in advance of the storm, where residents were advised to stock up on necessary supplies.

[17] Forecast heavy rains over the southeast-facing slopes of the Big Island failed to occur, as Flossie turned westward before low-level southeasterly winds had a chance to produce mountain-enhanced rainfall.

A large lava bench collapsed into the ocean on August 13, which may have been related to the hurricane's passage, or alternatively, a recent 5.4 magnitude earthquake.