Cool air and cool land mass on Island Of Hawaii sucks the heat energy out of Iselle.
Story submitted by reader “upcountrywater” who lives in Hawaii.
I live on Maui in Kula and the storm is now 8 hours late…
(satellite and radar images below shows disorganization of Iselle)
Satellite IR loop, watch it go pllbbbtt!
Radar image, shows scattered rain.
The big Island of Hawaii is a place where hurricanes come to die.
No where else on Earth are there mountains that rise from sea level to above 13,000′ in just a few miles, situated in the path of hurricanes . As one gains in elevation the air temperature drops.
The big isle is just over 4,000 sq. mi in area, and most of that land area is above 3,000′ .
Checking the topographic map, a large quantity of land area is above 5,000′.
As the warm circulating air mass of a hurricane closes in on the island, the warm moist air is replaced with cool dry air. Not only is the air cool at that elevation, the ground is also cool. The heat energy of the storm is being transferred to the chilly ground, delivering massive energy losses to the storm.
Additionally the mountains themselves act as a wind blocker resisting the hurricane circular air flow, and also slows the speed of the traveling storm. Of course the size of a hurricane needs to be taken into consideration, Iselle was a small cat 1 hurricane.
I live on Maui at the 3,200′ in an area called Kula, I’m about 6 miles away from the Polipoli Springs State Park, and the Skyline Ridge Trail which is on a ridge of Haleakala at the 7,000′ level there is a strong wind blowing in the trees, I can hear the faint howling, it sounds like a weak jet engine…I’ve heard that sound before, in the winter during a big trade wind storms.
6:00 AM in Kula it’s dead calm no rain, the clouds are moving in several directions at the same time, dark clouds are forming to the east and south of my location. A beautiful morning and I can’t stop looking at the dancing clouds.
This storm is now a rain event, some thunderstorms here and there..
All airports in the state are now open.
Some additional info collected by Anthony for this story.
Latest advisory from CPHC
Tropical Storm ISELLE Advisory Number 34
Issued at 500 AM HST FRI AUG 08 2014
SUMMARY OF 500 AM HST…1500 UTC…INFORMATION
Location: 19.3N 156.1W
ABOUT 70 MI…115 KM WSW OF HILO HAWAII
ABOUT 180 MI…290 KM SE OF HONOLULU HAWAII
Maximum sustained winds: 50 MPH…85 KM/H
Present movement: WNW or 290 degrees AT 13 MPH…20 KM/H
Minimum central pressure: 1003 MB…29.62 INCHES
WATCHES AND WARNINGS
CHANGES IN WATCHES AND WARNINGS WITH THIS ADVISORY…
THE HURRICANE WARNING HAS BEEN DISCONTINUED FOR HAWAII COUNTY. A
TROPICAL STORM WARNING IS NOW IN EFFECT FOR HAWAII COUNTY.
Latest from NWS:
URGENT - IMMEDIATE BROADCAST REQUESTED TROPICAL STORM ISELLE LOCAL STATEMENT NATIONAL WEATHER SERVICE HONOLULU HI 326 AM HST FRI AUG 8 2014 ...THE CENTER OF WEAKENING ISELLE HAS MOVED ASHORE NEAR PAHALA... .NEW INFORMATION... UPDATED STORM POSITION. .AREAS AFFECTED... THIS LOCAL STATEMENT PROVIDES INFORMATION FOR PORTIONS OF THE HAWAIIAN ISLANDS AND ADJACENT COASTAL WATERS. .WATCHES/WARNINGS... A HURRICANE WARNING CONTINUES FOR THE BIG ISLAND. A HURRICANE WARNING CONTINUES FOR WATERS AROUND THE BIG ISLAND. A TROPICAL STORM WARNING CONTINUES FOR NIIHAU...KAUAI...OAHU... MOLOKAI...LANAI...KAHOOLAWE...MAUI. A TROPICAL STORM WARNING CONTINUES FOR WATERS AROUND KAUAI... WATERS AROUND OAHU...KAIWI CHANNEL...MAUI COUNTY WATERS...PAILOLO CHANNEL AND ALENUIHAHA CHANNEL. A FLASH FLOOD WATCH IS IN EFFECT FOR ALL OF THE HAWAIIAN ISLANDS. .STORM INFORMATION... AT 3 AM HST...THE CENTER OF TROPICAL STORM ISELLE WAS LOCATED NEAR LATITUDE 19.2N...LONGITUDE 155.4W...OR ABOUT 40 MILES SOUTH OF HILO HAWAII ABOUT 220 MILES SOUTHEAST OF HONOLULU HAWAII. TROPICAL STORM ISELLE IS MOVING WEST AT 11 MPH. MAXIMUM SUSTAINED WINDS ARE NEAR 60 MPH. .SITUATION OVERVIEW... HEAVY RAINS AND TROPICAL STORM FORCE WINDS CONTINUE TO AFFECT THE WINDWARD SIDE OF THE BIG ISLAND OF HAWAII AND MAUI COUNTY EARLY THIS MORNING...WITH WINDS GUSTS OVER 50 MPH REPORTED IN FEW SITES. STRONG WINDS CONTINUED OVER OAHU AS WELL...WITH WIND GUSTS OVER 50 MPH REPORTED OVER THE KOOLAU MOUNTAINS. SWELLS GENERATED BY ISELLE WILL CONTINUE TO BUILD TODAY...POSSIBLY BECOMING DAMAGING ALONG SOME COASTLINES. THE THREAT OF COASTAL FLOODING AND PROPERTY DAMAGE WILL BE GREATEST ON WINDWARD BIG ISLAND.