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Get the New York, NY local weather forecast by the hour and the next 10 days. ... --UV Index. 4:32PM Sunset. 10 mph F 16 ... USA TODAY 4 hours ago
The ultraviolet index, or UV index, is an international standard measurement of the strength of the sunburn-producing ultraviolet (UV) radiation at a particular place and time. It is primarily used in daily and hourly forecasts aimed at the general public.
Highest ultraviolet index measured: On 29 December 2003, a UV index of 43.3 was detected at Chile/Bolivia's Licancabur volcano, at 19,423 feet (5,920 m) altitude. A light-skinned individual in such conditions may experience moderate sunburn in as little as 4 minutes.
Consider the sunburn, a deterministic effect: [4] when exposed to bright sunlight for only ten minutes [5] at a high UV Index, that is to say a high average dose rate, [6] the skin can turn red and painful. The same total amount of energy from indirect sunlight spread out over several years - a low average dose rate - would not cause a sunburn ...
Get the Boydton, VA local weather forecast by the hour and the next 10 days. ... --UV Index. 5:02PM Sunset. 4 mph F 6 km ... USA TODAY 8 hours ago
Get the Houston, TX local weather forecast by the hour and the next 10 days.
The WHO-standard ultraviolet index is a widely publicized measurement of total strength of UV wavelengths that cause sunburn on human skin, by weighting UV exposure for action spectrum effects at a given time and location. This standard shows that most sunburn happens due to UV at wavelengths near the boundary of the UVA and UVB bands.
--UV Index. 3:00PM Sunset. 22 mph F 35 km/h C Wind. 11 ... USA TODAY 13 hours ago Snow storm coming for Northern Plains: Nearly 7 million under winter storm warnings.