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Relative humidity is an important metric used in weather forecasts and reports, as it is an indicator of the likelihood of precipitation, dew, or fog. In hot summer weather, a rise in relative humidity increases the apparent temperature to humans (and other animals) by hindering the evaporation of perspiration from the skin.
Dryness provides better fuel for fires. As the air warms, its relative humidity also drops, sometimes to less than 20% or even less than 10%. The extremely low humidity helps dry out vegetation ...
The National Weather Service had warned that low relative humidity levels and wind gusts of around 15 mph through the afternoon "could support the rapid spread of any fires that ignite, which ...
Good morning, Chicago. The week is going to close out hot and humid. Temperatures will reach the high 90s today and tomorrow, but the high humidity will make it feel hotter than what the ...
If all the other factors influencing humidity remain constant, at ground level the relative humidity rises as the temperature falls; this is because less vapor is needed to saturate the air. In normal conditions, the dew point temperature will not be greater than the air temperature, since relative humidity typically [5] does not exceed 100%. [6]
Apparent temperature, also known as "feels like", [1] [2] is the temperature equivalent perceived by humans, caused by the combined effects of air temperature, relative humidity and wind speed. The measure is most commonly applied to the perceived outdoor temperature.
The wet-bulb temperature is the lowest temperature that may be achieved by evaporative cooling of a water-wetted, ventilated surface.. By contrast, the dew point is the temperature to which the ambient air must be cooled to reach 100% relative humidity assuming there is no further evaporation into the air; it is the temperature where condensation (dew) and clouds would form.
Widespread damaging winds and low relative humidity will produce critical to extremely critical fire weather in Southern California through Thursday with fire starts to rapidly grow in size with ...