PrincessV
DIS Veteran
- Joined
- Jul 6, 2006
Honestly with the way the forecast is trending a questions occurred to me. At what point do they consider calling a race. More particularly at what point do they consider calling the full for everyone’s safety?
I don't have details, and I know no inside info, but I can tell you conditions were MUCH worse for the 2012 TOT 10-Miler and it wasn't canceled. I really do not think WDW would call off a race for anything other than lightning, tornadoes, or a hurricane. Maybe if it was over 100*? But that's never happened.I'm curious to know this too, how warm is too warm?
ETA: Some info on flag warnings and heat calculations I found from RRCA. The colors at the bottom refer to flag warning colors...
https://www.rrca.org/resources/event-directors/guidelines-for-safe-events/easThe heat stress is calculated using a special scientific instrument, designed for that purpose. There are versions that can be permanently mounted in a fixed position, such as the side of building, and there are portable, handheld versions. The proper term for what is being measured is the Wet Bulb Globe Temperature Index, or WBGT Index. This index is expressed in either degrees of Celsius or degrees of Fahrenheit, depending on how you want your device to report. The WBGT Index is calculated using an accepted mathematical formula that takes into account the following variables:
The color codes correspond to specific parameters of the WBGT Index, with each color changing as the severity of the WBGT Index rises.
- Ambient temperature (the usual “weatherman forecast” temperature)
- Relative humidity
- Solar radiation (not the “glow in the dark” kind, but rather the “sunshine on a black car hood” kind)
- The cooling effect of wind
- Green – low risk – a WBGT Index of less than or up to 84.9F (29.3C)
- Yellow – moderate risk – a WBGT Index of between 85F to 87.9F (29.4C and 31C)
- Red – high risk – a WBGT Index of between 88F to 89.9F (31.1C and 32.1C)
- Black – extreme risk – a WBGT Index of more than 90F+ (32.2C)
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