Millennials Millennials Millennials, also known as Generation Y or Gen Y, are the generational demographic cohort following Generation X and preceding Generation Z. There are no precise dates for when this cohort starts or ends; demographers and researchers typically use the early 1980s as starting birth years and the mid-1990s to early 2000s as ending birth years. Millennials are sometimes referred to as "echo boomers" due to a major surge in birth rates in the 1980s and 1990s, and because millennials are often the children of the baby boomers. Although millennial characteristics vary by region, depending on social and economic conditions,
Hook echo between hook echoes and strong horizontal shear zones associated with storm rotation and tornadoes. Hook echoes are a reflection of the movement of air inside and around a supercell thunderstorm. Ahead of the base of the storm, the inflow from the environment is sucked in by the instability of the airmass. As it moves upward, it cools slower than the cloud environment, because it mixes very little with it, creating an echo free tube which ends at higher levels to form a bounded weak echo region or BWER. At the same time, a mid-level flow of cool and drier air