The Tropical Rainfall Measuring Mission or TRMM satellite passed over Tropical Storm Iselle and gathered data on clouds and rainfall as it affected Hawaii.
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. Fortunately, a combination of southwesterly wind shear, drier air and cooler waters weakened Iselle considerably as it approached the Hawaiian Islands.
Rainfall estimates for the period Aug. 4 to 11 for the Hawaiian Islands. Two swaths of heavier rain show the paths of Iselle and Julio. Iselle's rainfall totaled 60 to 80 mm (~3 inches, green) over the southeast coast of Hawaii and upwards of 120 mm (~5 inches, red) over Kauai.
Image Credit: SSAI/NASA, Hal Pierce
Although much weaker, Iselle still struck the southeast Kau coast of the Big Island of Hawaii as a rather strong tropical storm. In fact Iselle, was the strongest and only the second tropical storm to hit the Big Island in over 50 years. The center made landfall around 2:30 am HST on Friday, August 8, near Pahala with sustained winds of 60 mph.
The Big Island bore the brunt of the storm where downed trees and power lines left 25,000 people without power. Currently, several days after the storm, around 8,000 are still without power on the island. 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. On Kauai, however, one woman was reported to have been swept away and drowned while hiking.
TRMM captured an image of Iselle on August 9 at 09:06 UTC (August 8 at 11:06 p.m. local time) as the center was passing well south of the far western islands of Kauai and Ni'ihau. 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. There are several outer rainbands located only on the northeast side of the storm that were still effecting the western part of the state.
Data from that same satellite over pass (orbit) was used to create a 3-D image of the storm looking north. 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.
At 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. The analysis expands the rainfall coverage of the TRMM satellite. TMPA rainfall estimates were calculated to cover August 4 to 11 for the Hawaiian Islands and surrounding area.
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. 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. Locally, up to 14 inches of rain was reported in the higher elevations of the Big Island.
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.
TRMM is a joint mission between NASA and the Japanese space agency JAXA.
Text credit: Stephen Lang
SSAI/NASA Goddard Space Flight Center
Rob Gutro | Eurek Alert!
Less radiation in inner Van Allen belt than previously believed
21.03.2017 | DOE/Los Alamos National Laboratory
Mars volcano, Earth's dinosaurs went extinct about the same time
21.03.2017 | NASA/Goddard Space Flight Center
Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.
The results will be published on March 22 in the journal „Astronomy & Astrophysics“.
Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...
Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.
Ubiquitin is a small protein that can be linked to other cellular proteins, thereby controlling and modulating their functions. The attachment occurs in many...
In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...
Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to simulate these confined natural conditions in artificial vesicles for the first time. As reported in the academic journal Small, the results are offering better insight into the development of nanoreactors and artificial organelles.
Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to...
20.03.2017 | Event News
14.03.2017 | Event News
07.03.2017 | Event News
22.03.2017 | Materials Sciences
22.03.2017 | Physics and Astronomy
22.03.2017 | Materials Sciences