Tropical Cyclone Update  (Source: NHC web site)

World Meteorological Organization (WMO) and AWIPS (in parenthesis) headers:
WTNT61-65 KNHC (MIATCUAT1-5) - Atlantic
WTPZ61-65 KNHC (MIATCUEP1-5) - E. Pacific

Tropical Cyclone Updates are brief statements issued in lieu of or preceding
special advisories to inform of significant changes in a tropical cyclone or
to post or cancel watches or warnings. No structured issuance schedule exists
for these update statements.