08, 2014 (#2) - Tropical Storm Iselle Hits Hawaii Swells generated by Iselle will gradually diminish through Saturday evening.Īug. This rain could cause life-threatening flash floods as well as rock and mud slides. Heavy rainfall associated with the remnant of Iselle will continue, with up to 2 inches of additional rainfall expected. Iselle is expected to weaken to a trough by Monday night. Some weakening is forecast during the next 48 hours. Maximum sustained winds are near 35 mph, 55 km/h, with higher gusts. Iselle is moving toward the west near 14 mph, 22 km/h, and this motion is expected to continue for the next 48 hours. The eyewall is no longer visible in this view.Īt 11:00 pm HST, 0900 UTC, the center of post-tropical cyclone Iselle was located near latitude 20.3 north, longitude 160.8 west. The Terra satellite's Moderate Resolution Imaging Spectroradiometer or MODIS instrument shows Iselle over the Hawaiian Islands looking disorganized. 10, 2014 - NASA's Terra Satellite Shows a Disheveled Iselle Over Hawaii TRMM is a joint mission between NASA and the Japanese space agency JAXA.Īug. Julio, which is now a tropical storm, is currently located well north of Oahu (about 500 miles from Honolulu) and expected to continue moving away from Hawaii and steadily weaken. Locally, up to 14 inches of rain was reported in the higher elevations of the Big Island. Iselle's rainfall totals are on the order of 60 to 80 mm (~3 inches) over the southeast coast of Hawaii and upwards of 120 mm (~5 inches) over Kauai. Two swaths of heavier rain showed the paths taken by Iselle and Julio, which formed a few days after Iselle and followed a path slightly more to the north. TMPA rainfall estimates were calculated to cover August 4 to 11 for the Hawaiian Islands and surrounding area. The analysis expands the rainfall coverage of the TRMM satellite. Areas in green show that much of the rain is relatively shallow with tops ranging from about 5 to 8 km, but there are isolated areas of higher tops associated with deeper penetrating individual convective cells embedded within the rainbands.Īt NASA's Goddard Space Flight Center in Greenbelt, Maryland a TRMM-based, near-real time Multi-satellite Precipitation data (TMPA) analysis was conducted that uses TRMM data to calibrate rainfall estimates from other satellites.

There are several outer rainbands located only on the northeast side of the storm that were still effecting the western part of the state.ĭata from that same satellite over pass (orbit) was used to create a 3-D image of the storm looking north.

By that time, Iselle had been degraded to a tropical depression, and TRMM showed the exposed center of Iselle, which was devoid of any eyewall or even rain. local time) as the center was passing well south of the far western islands of Kauai and Ni'ihau. TRMM captured an image of Iselle on August 9 at 09:06 UTC (August 8 at 11:06 p.m. On Kauai, however, one woman was reported to have been swept away and drowned while hiking. After hitting the Big Island, Iselle continued to track to the west-northwest keeping the center of circulation well south of the rest of the Hawaiian Islands, which mainly received just rain from Iselle's outer rainbands. Currently, several days after the storm, around 8,000 are still without power on the island. The Big Island bore the brunt of the storm where downed trees and power lines left 25,000 people without power. The center made landfall around 2:30 am HST on Friday, August 8, near Pahala with sustained winds of 60 mph. In fact Iselle, was the strongest and only the second tropical storm to hit the Big Island in over 50 years. Although much weaker, Iselle still struck the southeast Kau coast of the Big Island of Hawaii as a rather strong tropical storm. Fortunately, a combination of southwesterly wind shear, drier air and cooler waters weakened Iselle considerably as it approached the Hawaiian Islands. Iselle was once a rather powerful category 4 hurricane in the East Pacific with sustained winds estimated at 120 knots (~138 mph) by the National Hurricane Center. The Tropical Rainfall Measuring Mission or TRMM satellite passed over Tropical Storm Iselle and gathered data on clouds and rainfall as it affected Hawaii. Tropical Storm Iselle Departs Hawaii While Julio Stays Well North

Iselle hurricane track