High Impact Weather Associated with a Predecessor Rain Event Over Misawa Air Base
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Authors
Svatek, Mike E.
Subjects
Tropical Cyclone
Typhoon
Warning
TCCOR
Predecessor Rain Event
PRE
Precipitable Water
PW
Misawa
Japan
OPNAVINST
Typhoon
Warning
TCCOR
Predecessor Rain Event
PRE
Precipitable Water
PW
Misawa
Japan
OPNAVINST
Advisors
Harr, Patrick
Date of Issue
2012-03
Date
Mar-12
Publisher
Monterey, California. Naval Postgraduate School
Language
Abstract
Two significant rain events of greater than 100 mm 24 h-1 occurred over Japan in direct association with tropical moisture transport from Typhoon (TY) Roke in September 2011. The first event occurred over Misawa Air Base, Japan during 1719 September 2011. Based on analysis of satellite imagery and numerical simulations, the Misawa rain event is classified as a predecessor rain event (PRE). A PRE is defined as a region of heavy rainfall that occurs thousands of kilometers poleward of a tropical cyclone (TC). The second rain event occurred over Nagasaki on 18 September 2011 and does not meet the requirements for PRE classification. The Department of Defense (DoD) TC warning process focuses on TC induced sustained high winds and their proximity to landfall. This analysis shows the link between the Misawa PRE and Roke via the poleward transport of deep tropical moisture. Because excessive rainfall is considered a destructive force associated with TCs, it is the purpose of this thesis that the U.S. Navys tropical cyclone conditions of readiness (TCCOR) procedures reflect PRE conditions in order to raise awareness within all meteorology communities amongst the DoD in efforts to minimize risks to DoD installations and personnel.
Type
Thesis
Description
Series/Report No
Department
Meteorology
Oceanography