*Hailstorm* (noun ) - a storm during which hail falls ….. in common parlance ‘hailstorm’ is ice shower … when ice falls from sky … the particles would be big and generally the downpour would not last for a longer duration
A storm is any disturbed state of an astronomical body's atmosphere, especially affecting its surface, and strongly implying severe weather. It may be marked by strong wind, thunder and lightning (a thunderstorm), heavy precipitation, such as ice (ice storm), or wind transporting some substance through the atmosphere (as in a dust storm, snowstorm, hailstorm, etc).
Hail is a form of precipitation that occurs when updrafts in thunderstorms carry raindrops upward into extremely cold areas of the atmosphere where they freeze into ice. Hailstorm - a type of storm that precipitates chunks of ice that aren't snow. Hailstorms usually occur during regular thunder storms. While most of the hail that precipitates from the clouds is fairly small and virtually harmless, there have been cases of baseball and golf ball sized hail that caused much damage and injuries.
Wind has various names – going by the geography and by the speed. Though there are various methods for determining the speed of the wind (not the devastation so caused) – the most popular is ‘beaufort scale’ - which is an empirical measure for describing wind speed. Its full name is Beaufort Wind Force Scale; created by Sri Francis Beaufort, a British Admiral and Hydrographer in 1806. The Beaufort scale is divided into a series of values, from 0 for calm winds to 12 and above for hurricanes. Each value represents a specific range and classification of wind speeds with accompanying descriptions of the effects on surface features.
A strict meteorological definition of a terrestrial storm is a wind measuring 10 or higher on the Beaufort scale, meaning a wind speed of 24.5 m/s (89 km/h, 55 mph) or more; however, popular usage is not so restrictive. Storms can last for hours together and can cause great devastation. Big terrestrial storms alter the oceanographic conditions that in turn may affect food abundance and distribution: strong currents, strong tides, increased siltation, change in water temperatures, overturn in the water column, etc.
In India, the fire policy coverage is under Standard Fire Policy specifies the ‘insured perils’ ….. “STFI” is a named peril… it actually is a group of wind and water perils …. “Storm, Cyclone, Typhoon, Tempest, Hurricane, Tornado, Flood and Inundation”. As could be deciphered, only such damages caused by the action wind, the speed of which could be classified as ‘storm, cyclone, typhoon, tempest, hurricane, tornado’ is payable … though commonly it is believed that strong gale winds causing damage is indemnifiable. Going by the beaufort yardstick, the strong or gale winds would not be within the ambit of the policy but only damages caused by winds of speed over 89 kmph or 55 mph.
The other Tariffed business ‘All India Motor Tariff’ – has more clarity… this again is a ‘named peril policy’ ……… under Sec 1 – loss of or damage to the vehicle insured – perils are listed out starting from ‘fire, explosion, self ignition or lightning’ ……………. V. is similar to STFI but more fully described as “by flood typhoon hurricane storm tempest inundation cyclone hailstorm frost; ”
The subtle difference is so well pronounced. Here is a photo showing the size of ‘hail’ and the damage caused by a hailstorm.
Hail damaged roof and bonnet of a car….
With regards – S. Sampathkumar
PS : circulated to my group of friends in 2007 and posted here now.
