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]

钩状回波（英语： hook echo ）是某些超级单体 雷暴中的一种垂坠或钩形天气雷达标志。 它出现在风暴的较低部分，当空气和降水流入 中气旋 （ 英语 ： mesocyclone ） 时，会导致 反射率 呈弯曲特征。

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.

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 …

A Hook Echo signature is usually a hook-like appendage to the low-level radar reflectivity echo of a supercell. The Hook Echo is located in the vicinity of the updraft, typically on the left-rear flank of cyclonic storms in the southern hemisphere, underneath a sloping echo overhang and below the storm’s echo top.

WHAT IS A HOOK ECHO? A hook echo is displayed on radar reflectivity. It is a signature produced by precipitation held aloft that wraps around the mid-level mesocyclone. Since the mesocyclone has counterclockwise winds, the reflectivity signature of a hook echo will have a cyclonically shaped hook.

A hook echo is a hook shape seen on a weather radar of some supercell thunderstorms. It is produced by rain, hail, or even debris wrapping around the thunderstorm. [1] A hook echo is a sign that a tornado has formed or is forming. If a hook echo is seen on radar, the National Weather Service may issue a tornado warning. [2]

2002年4月1日 · Abstract Nearly 50 years of observations of hook echoes and their associated rear-flank downdrafts (RFDs) are reviewed. Relevant theoretical and numerical simulation results also are discussed. For over 20 years, the hook echo and RFD have been hypothesized to be critical in the tornadogenesis process.

钩状回波（hook echo）是2009年公布的大气科学名词，指一般位于积雨云下部呈钩状的回波，常与龙卷等恶劣天气相伴随。

2024年11月14日 · A hook echo is a type of radar echo that occurs when a radar signal is reflected back to the radar antenna by a surface with a specific shape or orientation. The term "hook" refers to the shape of the echo, which resembles a hook or a curved shape.