#WHATS THE WEATHER FEEL LIKE HOW TO#
2.2 How to express Feels Like for highest temperatures.2.1 How to express Feels Like if the air temperature is below 10 oCelsius (50 oFahrenheit).2 The various ways to express Feels Like.G = 13.12 + 0.6215 x Temperature air in Celsius − (11.37 x (wind_speed m s -1 x 3.6) 0.16 + 0.3965 x Temperature air in Celsius x (wind_speed m s -1 x 3,6) x 2.3 0.16Ĭumulus MX from version 3.6.0 fully supports (in terms of derived outputs just listed) another of the Joint Action Group for Temperature Indices (JAG/TI) formulae for feels like. The official feels like temperature index formula of JAG/TI-2000 (temperature is measured at 1.50 metres, and wind speed at 10 metres, above ground): There has in the past been much divergence between different nations, but most now use that developed by scientists and medical experts on the Joint Action Group for Temperature Indices (JAG/TI).
#WHATS THE WEATHER FEEL LIKE SKIN#
The preferred expression varies as research into the effects of the 3 variables listed above on how temperature is perceived by bare skin on the human body continues. The best way to quantify that has been discussed in many scientific papers following on from experimentation in various laboratories, and so different formulae have been used at different times as more is learnt about how the body reacts to different conditions.Īll formulae involve the air temperature and at least one of the following variables as well as air temperature: The "feels like" temperature forecast is a handy tool that will help you avoid heat stress on your regular body temperature and better understand how it might feel when you're outside.Feels Like is a concept often quoted in weather forecasts, as the name suggests it attempts to quantify what human skin detects as the temperature, taking into account any warming or cooling effect of exposure to different humidity levels, high wind, or shade/sunshine. Ultimately, it makes us feel hotter than the temperature reading. When the air is humid, there's a lot of moisture already in the air, and that evaporative cooling process is significantly reduced."Īs a result, the heat and the sweat are kept really close to our bodies, preventing us from cooling down. "This process is known as evaporative cooling. "The reason for this is that, normally, when we're hot, we sweat, and that sweat evaporates off our skin, cooling us down." "So the temperature could be 29 ☌, but it feels a very warm 38 ☌ ," adds Sturrock. On the opposite side of the spectrum, when humidity is the key factor, it can often feel a lot warmer - this is often the case in tropical regions. "The reason this occurs is that we all have a thin, warm layer of air around our body, and the wind comes along, and it strips away that layer, leaving our skin exposed so that we feel colder." "Then, when you head outdoors, you feel it's a lot chillier than 22 ☌." "So, for example, if you're about to head outdoors, you check the temperature forecast, and it says 22 ☌, so you decide to leave the jumper at home," explains Jenny Sturrock, senior meteorologist at Australia's Bureau of Meteorology. This is called wind chill, and there's even a chart that addresses it.
The truth is that wind and relative humidity can dramatically change how someone experiences the air temperature outdoors.įor instance, when the wind is especially strong, it will make us feel colder. On the other hand, the "feels like" temperature is calculated to understand how an average person would feel, dressed for the current season, outside. The official temperature is normally a recording of the air temperature from a thermometer installed on weather stations, radars, and meteorological observatories. The "feels like" temperature is a practical way of helping people better understand how they're going to feel when they get outside, no matter the time of the day.
It's because people often comment that it's a lot hotter or a lot colder than what the temperature or the observation tells them. The "feels like" temperature considers three key factors: the actual air temperature, the strength of the wind at around five feet, and relative humidity.īut why is there a need to differentiate both measuring methods? The explanation for this subtle yet relevant variation between concepts lies in the variables taken into consideration to define "feels like" temperature. There is a difference between the actual outside temperature and the so-called "feels like" temperature.