Heat Index Conversion Table

Below is a chart based on the NWS equation that can be used to estimate temperature and the level of danger associated with varying relative humidity percentages. Potential effects of heat index. As described above, the heat index is the temperature equivalent perceived by humans as a result of air temperature, relative humidity, and wind speed.

Heat Index Chart and Explanation. WPC Heat Index Forecasts More Meteorological Conversions and Calculations . NOAA National Weather Service National Centers for Environmental Prediction Weather Prediction Center 5830 University Research Court College Park, Maryland 20740 Weather Prediction Center Web Team Disclaimer

If the air temperature is given in degrees Celsius C, we must convert the temperature value to degrees Fahrenheit F. To do this check out the temperature conversion formula at Temperature Conversion Then, we can calculate the heat index with this complex formula I nde x he at 42.379 2.04901523 T 10.14333127 rh

The heat index, or the humidex, is the quotfelt air temperaturequot. It takes into account both the air temperature and its humidity to describe how hot it really feels. Moist air feels hotter because it hinders the evaporation of sweat our natural cooling mechanism.. It is worth noting that the heat index only considers the relative humidity in shaded areas.

The 'Heat Index' is a measure of how hot the weather 'feels' to the body. The heat index HI or apparent temperature or humiture or humidex is an index that combines air temperature and relative humidity. This Heat Index chart uses relative humidity and air temperature in fahrenheit to produce the 'apparent temperature'.

The 'Heat Index' is a measure of how hot weather quotfeelsquot to the body. This table uses relative humidity and air temperature to produce the quotapparent temperaturequot or the temperature the body quotfeelsquot. These values are for shady locations only. Exposure to full sunshine can increase heat index values by up to 15F. Also, strong winds,

Heat Index Tables In the heat index tables below, find the appropriate temperature at the top of the table. The humidity table is immediately below this and the dewpoint table is below it. The number which appears at the intersection of the temperature and either the humidity on the left or the dewpoint on the left, is the heat index.

Heat-stress risk with physical activity andor prolonged exposure. 90 - 104 Heat cramps or heat exhaustion possible 105 - 130 Heat cramps of heat exhaustion likely. Heat stroke possible. 130 and up Heat stroke very likely. Caution This chart provides guidelines for assessing the potential severity of heat stress.

Calculate the heat index from the temperature and humidity either relative humidity or dew point, or use a simple heat-index conversion chart.

Learn how to calculate and interpret the heat index, an estimate of how hot the air feels to the human body. Use the online calculator or the printable charts to convert temperature and humidity to heat index.