Hook echo - Wikipedia
A hook echo is a pendant or hook-shaped weather radar signature as part of some supercell thunderstorms. It is found in the lower portions of a storm as air and precipitation flow into a mesocyclone, resulting in a curved feature of reflectivity. The echo is produced by rain, hail, or debris being wrapped around the supercell. [1]
Hook Echo, Debris Ball, Bow Echo: What Meteorologists Mean By ...
2024年3月20日 · When tornadoes are spawned by supercells, they are located near the tip of the hook echo on radar. But a hook echo doesn't always mean a tornado is in progress.
Understanding basic tornadic radar signatures - ustornadoes.com
2013年2月14日 · The Hook Echo. The most recognized and well-known radar signature for tornadic supercells. This “hook-like” feature occurs when the strong counter-clockwise winds circling the mesocyclone (rotating updraft) are strong enough to wrap precipitation around the rain-free updraft area of the storm.
Severe Weather 101: Tornado Detection - NOAA National Severe ...
A “hook echo” describes a pattern in radar reflectivity images that looks like a hook extending from the radar echo, usually in the right-rear part of the storm (relative to the motion of the storm). A hook is often associated with a mesocyclone and indicates favorable conditions for …
Supercells: What to Know About These Dangerous Thunderstorms
2024年5月6日 · Supercells have a distinct appearance on Doppler radar, which often features a so-called hook echo on the lower-left portion of the storm.
Hook echo | meteorology | Britannica
…updraft to produce a “hook echo,” a hook-shaped region of precipitation that flows out of the main storm and wraps around the updraft. Such inferences were highly subjective and prone to false alarms or very short-notice warnings.
Radar Image of a Violent Tornadic Supercell - NOAA/NWS …
The "hook echo" in radar reflectivity imagery has been associated with tornado-producing thunderstorms since the 1950s. Rarely, however, is the signature this classical, this obvious.