Issue link: http://itf.uberflip.com/i/246310
EXTREME WEATHER CONDITIONS Extreme weather conditions shall be defined at such time that heat, as measured by a Heat Stress Monitor, meets or exceeds a heat stress index of 30.1 degrees Celsius/86.2 degrees Fahrenheit. If a Heat Stress Monitor is not available, extreme weather conditions are then defined by the danger zone which is equal to or above the apparent temperature of 93 degrees Fahrenheit, illustrated on the chart below. Heat stress is measured by Wet Bulb Global Temperature (WBGT) which is calculated as (0.7 Wet Bulb + 0.2 Global Temperature + 0.1 Dry Bulb = WBGT). Apparent Temperature (what it is like) Air Temperature (°F) °C =5/9 (°F - 32) Fahrenheit/F Humidity 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% 70 75 80 85 90 95 100 105 110 115 120 64 65 66 67 68 69 70 70 71 71 72 87 90 93 96 101 107 114 124 136 69 70 72 73 74 75 76 77 78 79 80 73 75 77 78 79 81 82 85 86 88 91 78 83 80 85 82 87 84 90 86 93 88 96 90 100 93 106 97 113 102 122 108 91 95 99 103 95 100 105 111 99 105 112 120 104 113 123 135 110 123 137 151 120 133 150 132 149 144 107 116 130 148 The Sports Medicine Trainer/PHCP and the ITF Supervisor have the authority to determine if the Extreme Weather Condition rule will go into effect during a Tournament. If it is so determined, a ten (10) minute break will be allowed between the second and third sets. There may also be a delay in the starting time of the matches scheduled for play that day. When possible, this decision to delay the start of matches due to Extreme Weather Conditions should be made prior to the scheduled start of play. Measurement and Monitoring of Weather Conditions The Sports Medicine Trainer/PHCP will monitor weather conditions by taking measurements a minimum of three (3) times and a maximum of five (5) times during the day. The readings will be determined prior to the start of play and will be posted in the ITF Supervisor's office. The minimum of three readings will be taken: (1) ½ hour before match play begins for the day; (2) middle of the scheduled day; (3) prior to beginning of the last match of the day or prior to the start of the first night session match. 87 ITF Women's Circuit