An invest in meteorology (short for investigative area, alternatively written INVEST) is a designated area of disturbed weather that is being monitored for tropical cyclone development. Invests are designated by three separate forecast centers: the National Hurricane Center, Central Pacific Hurricane Center and Joint Typhoon Warning Center.
Invests are designated by three separate forecast centers: the National Hurricane Center, Central Pacific Hurricane Center and Joint Typhoon Warning Center. The designation of a system as an invest does not necessarily correspond to any particular likelihood of development of the system into a tropical cyclone. Invests are numbered from 90 to 99, followed by L in the Atlantic, E and C in the East and Central Pacific respectively, or W in the West Pacific; the Joint Typhoon Warning Center also issues unofficial warnings for the Australian cyclone region, designating tropical invests with the "S" suffix when they form west of 135°E, and the "P" suffix when they form east of 135°E. Invests in the North Indian Ocean cyclone basin are also labelled by the JTWC, and are suffixed with "A" if they form in the Arabian Sea and with "B" if they form in the Bay of Bengal. Numbers are rotated within the season and are re-used as necessary (the next invest after 99 would be numbered 90). If the system develops into a tropical cyclone, it is reclassified as the next name/number on the list.
- Navy/NRL Tropical Cyclone Page - Current tropical cyclones and INVESTS worldwide