In this work, we describe extreme-rainfall statistics in
the development of an ARI extreme-rainfall warning system based on 14 yr of TRMM retrospective, version
7, 3B42RT data and conversion of near-real-time
TMPA into ARI maps for the region of 508S–508N. It
is an important value-added TRMM product for research
and disaster monitoring purposes, especially for
oceanic, remote, or developing regions where surfacebased
measurement is scarce. In the following sections,
we will describe the procedures, results, and limitations
of TRMM-based ARI products.