Temperature Heat Index Chart

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.

The temperature shown at the point where these two values intersect is the Heat Index temperature. Heat Index Chart air temperature and relative humidity Heat Index Chart air temperature and dewpoint A different display of the Heat Index A slightly different Heat Index adaptation. Humidex Table A Celsius heat index

Temperature amp Relative Humidity 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.

Heat Index 105-129 degrees F Health Effect Sunstroke, heat cramps and heat exhaustion are likely. Heat stroke is possible with prolonged exposure andor physical activity Recommendations Avoid strenuous outdoor activity Stay indoors in an air conditioned facility Stay well-hydrated. Drink 10 gulps every 20 minutes. Heat Index 90-104

These heat index products are issued by WPC twice per day at approximately 02Z and 16Z for the valid days 3 through 7. They are based on an ensemble of model and human forecasts. Deterministic plots indicate the most likely forecast while probabilistic plots depict the chance of exceeding various thresholds.

Figure 1. Heat index chart. In order to determine the heat index using the chart above, you need to know the air temperature and the relative humidity. For example, if the air temperature is 100F and the relative humidity is 55, the heat index will be 124F. When the relative humidity is low, the apparent temperature can actually be lower

The chart is a grid where you can find the heat index temperature by looking at the air temperature and relative humidity. For example, the NWS says if it's 96 outside and the humidity is 65, the

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'. Heat index also equals the actual air temperature when the partial pressure of water vapor is

The quotheat indexquot is how hot it feels, combining temperature and humidity. Dangerous heat is the No. 1 weather-related killer in the United States. Find a heat index chart plus sun safety tips.

Learn how to estimate the heat index, an indicator of how hot the air feels to the human body, based on temperature and humidity. Use the online calculator or the printable charts to convert between temperature and heat index or dew point temperature.