Japan Geoscience Union Meeting 2019

Presentation information

[E] Poster

A (Atmospheric and Hydrospheric Sciences ) » A-AS Atmospheric Sciences, Meteorology & Atmospheric Environment

[A-AS02] Advances in Tropical Cyclone Research: Past, Present, and Future

Thu. May 30, 2019 5:15 PM - 6:30 PM Poster Hall (International Exhibition Hall8, Makuhari Messe)

convener:Sachie Kanada(Nagoya University), Akiyoshi Wada(Department of Typhoon and Severe Weather Research, Meteorological Research Institute), Kosuke Ito(University of the Ryukyus), Yoshiaki Miyamoto(Faculty of Environment and Information Studies, Keio University)

[AAS02-P03] Moisture Budget Analysis for Hurricane Precipitation on Texas

*Satoshi Iizuka1, Naoki Sakai1 (1.National Research Institute for Earth Science and Disaster Resilience)

Keywords:Hurricane Harvey, Precipitation, Moisture Budget

In August 2017, Hurricane Harvey brought the unprecedented amount of rainfall and catastrophic flooding on the Houston metropolitan area, as it stagnated near the coast of Texas for several days after its decline to a tropical storm intensity. The present study compares the moisture budget for rainfall associated with Harvey with those of past hurricanes making landfall on Texas. It seems that the high pressure over the west coast region of the US, along with the meandering of the subtropical jet starting from the periphery of Hawaii and toward the south in Texas, stagnated Hurricane Harvey around the coast of Texas for several days. The meandering of the subtropical jet toward the south in Texas also caused the largest convergence of moisture advected from the Gulf of Mexico efficiently over Texas, although the accompanied high pressure was not extraordinary event. Therefore, it is suggested that surrounding meteorological conditions can greatly affect rainfall related to tropical cyclones.