Wet-bulb globe temperature (WBGT) in the sun for San Diego and Imperial counties, calculated by the SDSU Climate Lab from NOAA forecasts.
WBGT combines air temperature, humidity, wind and sunshine into one number for how much heat stress a person in direct sun is under. It is the measure athletic trainers, the military and outdoor employers use to plan work and rest.
Each forecast takes temperature, dew point, wind and solar radiation from the NOAA National Blend of Models (NBM v4.2) on its 2.5 km grid and applies the Liljegren method for WBGT in the sun.
Disclaimer: Calculated based on NOAA NBM v4.2 data. These are experimental forecasts provided for information only.
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