Hawaii Braces for Torrential Downpour; Statewide Flood Watch Issued
Hawaii is bracing for another round of heavy rainfall this week. The National Weather Service has issued statewide flood watches, prompted by powerful rain bands expected from Wednesday through Friday. This warning follows recent severe flooding across the islands in March.
Forecasted Rainfall Across Hawaii
Rainfall is expected to significantly increase starting Wednesday. The heaviest precipitation is anticipated across The Big Island and Kauai, with totals potentially reaching up to 8 inches. In higher elevations, amounts might even exceed this projection.
Rainfall Totals
- The Big Island: Up to 8 inches
- Kauai: Up to 8 inches
- Honolulu: Over 1 foot since March 1 (approximately 6 times the average)
- Kahului: Over 20 inches since March 1 (about 1.5 feet above normal)
- Peak of the Volcanoes: Potential snowfall of up to 3 inches and ice of up to 0.25 inches
The current saturated ground increases the risk for flash flooding throughout the state. For instance, Honolulu has experienced drastic rainfall, significantly above its normal levels, further heightening flood concerns.
Possible Hazards During the Rainfall
Wind gusts ranging from 40 to 50 mph may occur, especially in higher elevations. The approaching cold front from the northwest, combined with a surface trough, is driving the southerly winds carrying moisture towards Hawaii.
Understanding the Weather Patterns
The combination of these weather systems contributes to the impending heavy rains, which will predominantly affect the western sides of the islands. A surface-level low pressure system developing west of Hawaii is also expected to amplify the moisture surge.
While termed a “Kona Low,” this system is not solely responsible for the rainfall. However, the terminology is of less importance than the imminent impacts on the already waterlogged areas of the state.
As Hawaii prepares for this weather event, residents and visitors are urged to stay informed and take necessary precautions. The flood threat remains a genuine concern given the conditions exacerbated by previous storms in March.
