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・ Weather Report (1982 album)
・ Weather Report discography
・ Weather Report Girl
・ Weather Research and Forecasting Model
・ Weather risk management
・ Weather rock
・ Weather satellite
・ Weather Service Modernization Act of 1992
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・ Weather spotting
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Weather Stress Index
・ Weather Systems (Anathema album)
・ Weather Systems (Andrew Bird album)
・ Weather systems (disambiguation)
・ Weather testing of polymers
・ Weather the Lizard
・ Weather the Storm
・ Weather Tower
・ Weather Underground
・ Weather Underground (album)
・ Weather Underground (disambiguation)
・ Weather Underground (weather service)
・ Weather Underground of Hong Kong
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Weather Stress Index : ウィキペディア英語版
Weather Stress Index

The Weather Stress Index, or WSI, is a relative measure of the weather conditions, often used as a comfort indicator. The index, a number between 0 and 100, represents the percentage of time in the past with temperatures below the current temperature, for a given location, day and time. This makes the index a local measure based in past weather conditions. For example, if for a given location, on the 25th of July at 13:00 UTC the WSI is 85 for a temperature of , this means that the temperature was inferior to 42 °C in 85% of the time in the past, on the same place, on the 25th of July at 13:00 UTC (and superior to 42 °C in 15% of the time on the same place, day and hour). In other words, the WSI gives the probability of finding a smaller temperature in the local weather history, at a given day and time, than that of the present measurement. Therefore, high values of WSI predict a relative discomfort from excessive heat for local inhabitants.
== Using the index ==

The same WSI for different geographic points might not refer to the same temperature - a WSI of 99.99 for a given location near the North Pole might refer to a temperature that, in lower latitudes, could be rated with a WSI of 50 (an average temperature) for the same day and hour.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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