(a) The final category can never be lower than the
highest hazard-based category;
(b) The TCSS should adequately reflect the case of
high potential risk of two or more hazards. We
consider a hazard of high risk when its respect-
ive category is classified as 3 or higher (equal
to the definition for a Major Hurricane on the
SSHWS). Whenever (at least) two high risk haz-
ards have the same category value and the third
hazard has a lower category value, the final
category should increment the highest hazard-
based category. This implies that a TC scoring a
Category 3 on both wind and storm surge, and
a Category 1 on rainfall, will be classified as a
Category 4.
(c) To warn the general public for an event with
multiple extreme hazards, a high-risk TC can be
classified as a Category 6 when either 1. at least
two of the hazard-based categories are of Cat-
egory 5; or 2. two categories are of Category 4,
and one of Category 5.
(a) The final category can never be lower than the highest hazard-based category;
(b) The TCSS should adequately reflect the case of high potential risk of two or more hazards. We consider a hazard of high risk when its respect- ive category is classified as 3 or higher (equal to the definition for a Major Hurricane on the SSHWS). Whenever (at least) two high risk haz- ards have the same category value and the third hazard has a lower category value, the final category should increment the highest hazard- based category. This implies that a TC scoring a Category 3 on both wind and storm surge, and a Category 1 on rainfall, will be classified as a Category 4.
(c) To warn the general public for an event with multiple extreme hazards, a high-risk TC can be classified as a Category 6 when either 1. at least two of the hazard-based categories are of Cat- egory 5; or 2. two categories are of Category 4, and one of Category 5.