Intertropical Convergence Zone of human errors which ultimately doomed the flight. Most aircraft flying these routes are able to avoid the larger convective cells without incident. Intertropical Convergence Zone The Intertropical Convergence Zone (ITCZ), known by sailors as the doldrums or the calms, is the area encircling Earth near the Equator, where the northeast and southeast trade winds converge. The ITCZ was originally identified from the 1920s to the 1940s as the "Intertropical Front" ("ITF"), but after the recognition in the 1940s and the 1950s of the significance of wind field convergence in tropical weather production, the term "ITCZ" was then applied. When
Mohawk–Hudson convergence with SMHC have the potential to become severe. Mohawk–Hudson convergence Mohawk–Hudson convergence (MHC) is a mesoscale meteorology phenomenon occurring over the Capital District region of upstate New York, United States. The small convergence zone forms within specific weather conditions sometimes found in the wake of extratropical cyclones shifting east of the area. Given air pressure decreasing with both longitude and latitude, as well as weak synoptic low-level flow, winds are channeled east along the Mohawk Valley and south through the Hudson Valley, converging over Albany. With sufficient moisture in the lower atmosphere, a localized area of precipitation may form where