Wet Bulb Globe Temperature
- The Wet Bulb Globe Temperature (WBGT) is not quite the same as heat index.
- The WBGT is taken in the Sun to account for the intensity and angle of the Sun’s energy striking the Earth.
- It also uses wind measurements to get a more accurate picture of how people respond to hot weather conditions. The colored flags indicate the level of heat stress danger.
| Category |
WBGT°F |
WBGT°C |
Flag Color |
| 1 |
<= 79.9 |
<= 26.6 |
White |
| 2 |
80 - 84.9 |
26.7 - 29.3 |
Green |
| 3 |
85 - 87.9 |
29.4 - 31.0 |
Yellow |
| 4 |
88 - 89.9 |
31.1 - 32.1 |
Red |
| 5 |
=> 90 |
=> 32.2 |
Black |