Storms In Hawaii Cause Widespread Flooding, Other Havoc. Worst In Years

Torrential rains in Hawaii made this house
slide down into a raging river as a 
long lasting, severe storm rakes the
islands. Photo via Facebook, 
Dillon Mitchell 

A week long storm is easing - but not quite done - as Hawaii once again reels from widespread flooding, wind damage and landslides. This storm was the worst in a series. 

As Forbes reports:

"Governor Josh Green declared a state of emergency as the week-long onslaught of rainfall, landslides and infrastructure damage continued into the weekend."

Forbes continued: 

"'Maui got it even worse and locals describe that the whole island feels like it is underwater,; wrote his Dodds in Surfer. He continued: 'The steep slopes around Haleakala turned into walls of mud, rock and debris moving at terrifying speed. Some are calling it the worst rainstorm in the island's modern history.'"

Rainfall amounts were incredible. A site in Maui recorded a five-day total of 44.37 inches of rain. Other sites on Maui had 25 to 35 inches of rain over those five days. 

On the big island of Hawaii, Mauna Loa had 25.45 inches of rain in five days with other sites on the Big Island coming in with over 20 inches. A few locations on Kauai and Oahu reported nearly 20 inches of rain over that five-day period. 

Those rainfall amounts were even greater than forecasts, which were themselves ominous. 

On Maui, roads became rivers, with vehicles floating in them like leaves in a stream. In one neighborhood, a large storage container joined the vehicles that had floated downstream. Tourists could not cross the rushing water on the streets to make it back to their condos. It was too dangerous. 

 Power outages have kept coming in recent days even as crews have worked in the storms to restore power. More than 120,000 Hawaiian homes and businesses were without power Friday. That number was at around 114,000 on Saturday. 

More than 100,000 Hawaiians were without power Saturday. 

The Hawaii Department of Transportation reported parts of numerous roads closed due to the heavy rain and flooding

In Waikiki, news video showed high winds and sheets of heavy rain, making the streets look like they were enduring an approaching hurricane. Streets and sidewalks were louder water. In a luxury shopping district, an enormous tree collapsed in the storm, blocking most lanes of a wide, busy avenue. 

Nearly an hours's drive from Waikiki on Oahu's North Shore, things were even worse. Major roads, fields,s, and even a major beach access were under muddy water because of the relentless rain 

Video from Maui showed a house collapsing into a swollen river. Sections of roads have collapsed, some taking cars and SUVs with them.  

On the Big Island, Kilauea volcano complicated things further. Just before the storm, an eruption created a rain of tephra (chunks of lightweight lava, debris and ash) on areas surround the volcano. That's the second time this winter such an event happened, and this one was more extensive than a tephra fall back in January.  In some places six inches of tephra accumulated.

Cleaning up that mess was complicated by the heavy rains. And I imagine the tephra clogged ditches and brooks somewhat, which would exacerbate flooding. 

If this post sounds kind of familiar, it's because we reported on another destructive storm back on  February 11.  It's been an incredibly rainy, windy winter in Hawaii

As I earlier noted, the storm over the past few days far outdid and out-damaged all the other previous storms this winter.   

Some of the storm's origins came from as far as the southwestern United States. The building heat wave and strong dry high pressure is causing a blockage in the atmosphere, allowing a train of storms to blast through the Hawaiian Islands. 

The principal storm was know as a Kona Low, which frequently occur in Hawaii during the winter. Usually winds in Hawaii blow from the east. A Kona Low forms when winds shift to the west or southwest, bringing much more humid air from the tropics. 

Because of the usual trade winds, the wettest parts of Hawaii are on the north and east side of the islands. South and west sides are actually pretty dry. The Kona storms, with their high humidity and southwest winds, can drown the the drier parts of the island. 

The storm is easing as to today. Instead of wet southwest winds, or the usual east to northeast trade winds, the breezes are slackening to near calm. That'll keep showers going all week across the islands. There's the risk of yet another Kona storm towar