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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]
Due to this, these storms are sometimes referred to as rotating thunderstorms. [2] Of the four classifications of thunderstorms (supercell, squall line, multi-cell, and single-cell), supercells are the overall least common and have the potential to be the most severe. Supercells are often isolated from other thunderstorms, and can dominate the ...
Local Radar Image. What is a supercell? A supercell is a large thunderstorm that has a deep and persistent rotating updraft. It looks like a very tall storm cloud that has an anvil or elongated ...
The rear flank downdraft can arise owing to negative buoyancy, which can be generated by cold anomalies produced at the rear of the supercell thunderstorm by evaporative cooling of precipitation or hail melting, or injection of dry and cooler air in the cloud, and by vertical perturbation pressure gradients that can arise from vertical gradients of vertical vorticity, stagnation of ...
The near 26 inches of rain at Fort Lauderdale-Hollywood International Airport was a 1-in-1,000-year storm.
Around 100 properties were damaged by what police called a ‘localised tornado’ that whipped through Stalybridge, Tameside, on Wednesday.
Evolution of a splitting thunderstorm as observed by weather radar in the Northern Hemisphere. As the parent storm moves east (towards the right), it splits into a left-moving and right-moving component, with the left-moving storm visibly weaker.
Reflectivity radar loop of the supercell thunderstorm that produced the EF3 Springfield tornado. Between 8:18 a.m. and 9:15 a.m. , severe storms producing 1 in (2.5 cm) hail developed over portions of New Hampshire, Massachusetts and Maine; however, little if any impact resulted from these storms. [11]