Background:
1. Because this is a forecasting tool, the WBGT values should be interpreted like that from any other weather forecast. Over the first few days, the tool has much skill in forecasting WBGT. However this skill declines towards the end of the five-day forecast period. Consequently, its output should be considered as a rough guide of the expected WBGT.
2. The WBGT forecast is updated every day around 6:30 am and 12:30 pm.
Interpreting the Forecast:
1. The undulating thick line is the predicted wet bulb globe temperature (WBGT).
2. The shaded area around the WBGT line represents the possible range of values from full sun exposure (top of shaded area in the plot) to full shade (bottom of shaded area in the plot) for WBGT. Note that shady conditions will also be observed if there is a thick overcast sky.
3. Hover your mouse over the WBGT line to see the forecasted WBGT and the range of values for varying amounts of sunlight.
4. The color bands represent warning levels as outlined by the NCHSAA. Scroll down to see recommendations for action for each warning level.
5. It is important to note that WBGT can fluctuate on scales smaller than what the forecast can resolve. Variations in solar radiation from passing clouds, differences in tree cover, and changes in surface type (e.g. grass, asphalt, concrete), wind, and humidity can occur within short distances, such as from one side of a street or field to the other, and over short time periods, such as from one minute to the next. Users should interpret the forecast as a general indication of expected conditions for their location, keeping in mind that actual conditions at a specific point and time may differ, potentially shifting the forecast by multiple flag levels (e.g. green flag on a shaded side of the street and yellow or red flag on the exposed side).