Deprecated: Function ereg() is deprecated in /srweb/html/tsa/dsp/element.php on line 118 Deprecated: Function ereg() is deprecated in /srweb/html/tsa/dsp/element.php on line 185 Deprecated: Function ereg() is deprecated in /srweb/html/tsa/dsp/element.php on line 185 Deprecated: Function ereg() is deprecated in /srweb/html/tsa/dsp/element.php on line 188 Deprecated: Function ereg() is deprecated in /srweb/html/tsa/dsp/element.php on line 185 Deprecated: Function ereg() is deprecated in /srweb/html/tsa/dsp/element.php on line 188 Deprecated: Function ereg() is deprecated in /srweb/html/tsa/dsp/element.php on line 185 Deprecated: Function ereg() is deprecated in /srweb/html/tsa/dsp/element.php on line 188 Deprecated: Function ereg() is deprecated in /srweb/html/tsa/dsp/element.php on line 185 Deprecated: Function ereg() is deprecated in /srweb/html/tsa/dsp/element.php on line 188 Deprecated: Function ereg() is deprecated in /srweb/html/tsa/dsp/element.php on line 185 Deprecated: Function ereg() is deprecated in /srweb/html/tsa/dsp/element.php on line 188 Deprecated: Function ereg() is deprecated in /srweb/html/tsa/dsp/element.php on line 203 Deprecated: Function ereg() is deprecated in /srweb/html/tsa/dsp/element.php on line 252 Deprecated: Function ereg() is deprecated in /srweb/html/tsa/dsp/element.php on line 287
DaySatSunMonTueWedThuFri
WBGT
Max T
Heat Index
Max Wind

Other Images

OK Mesonet Current Solar Rad

Safety and Preparedness

WetBulb Globe Temperature (WBGT)

What to do before (Preparedness):

  • Bring plenty of water. Plan on taking frequent breaks in the shade
  • Wear a hat, light weight, light fitting, light colored clothes.

What to do during (Safety):

  • Take breaks in the shade. Strenuous outdoor activities should be reduced, especially in direct sunlight where there is little ventilation.
  • Drink plenty of water or other non-alcohol fluids. Your body needs water to keep cool. Drink plenty of fluids even if you don’t feel thirsty.
  • Don’t get too much sun. Sunburn makes the job of heat dissipation that much more difficult

Threat levels and suggested work-load actions :

Level
Affects
Precautionary Actions
green light=no theat

yellow light=limited threat Working or exercising in direct sunlight will stress your body after 45 minutes. Take at least 15 minutes of breaks each hour if working or exercising in direct sunlight
red light=elevated threat Working or exercising in direct sunlight will stress your body after 30 minutes. Take at least 30 minutes of breaks each hour if working or exercising in direct sunlight
purple light=significant threat Working or exercising in direct sunlight will stress your body after 20 minutes. Take at least 40 minutes of breaks each hour if working or exercising in direct sunlight
black light=critical threat Working or exercising in direct sunlight will stress your body after 15 minutes. Take at least 45 minutes of breaks each hour if working or exercising in direct sunlight
Links
Email
More WBGT Information
WBGT Research Paper
OSHA work load and WBGT Manual

Legend and Definitions


The WBGT shown is the maximum WBGT for the 24 hour period. Usually it is highest during mid afternoon. The WBGT is a measure of the heat stress in direct sunlight which takes into account; temperature, humidity, wind speed, sun angle and cloud cover (solar radiation). This differs from the heat index which takes into consideration temperature and humidity and is calculated for shady areas. If you work or exercise in direct sunlight, this is a good element to monitor. Military agencies, OSHA and many nations in tropical or hot climate areas use the WBGT as a guide to managing work load in direct sunlight.

Level
WBGT
green light=no threatNil  < 83 deg F
yellow light=limited threatLimted 83-86 deg F
red light=elevated threatElevated 87-90 deg F
purple light=significant threatSignificant 91-93 deg F
black light=critical threatCritical > 93 deg F
Links
More WBGT Information
WBGT Research Paper
OSHA work load and WBGT Manual

USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.