User Guide

When you click or tap on one of the bubbles representing the different stations, a bubble containing information will pop up. The below diagram shows what everything in the bubble means:

It’s very important to pay attention to the time. I haven’t added a feature to filter outdated estimates (in the map; the data section filters out old results), so occasionally the data might be too old to be useful. The weather is updated around the top of the hour, so sometimes there’s a bit of lag. If the time if more than a half an hour or so in the past, disregard the data, and maybe check another nearby station for current data.

The standard deviation (SD) is also useful to take into consideration because it represents the variance in the four models. The range is derived from the standard deviation and average of the five models.

Advisories and Warnings

Heat Watch — At least one of the thresholds for potential heat stress has been exceeded.

Heat Advisory — An important threshold for heat stress has been exceeded at a level correlated with increased hospitalizations.

Heat Warning — An important threshold for heat stress has been exceeded at a level correlated with large increases in hospitalizations.

The above are based on five different variables derived from atmospheric measurements and estimates. All indices have been supported by research; however, they are to be considered experimental and should not be used for any kind decision making or to ascertain whether conditions are safe or not. Refer to your government's weather service for reliable and trustworthy weather advisories and consider taking your own measurements with a reliable WBGT meter if hyperlocal accuracy is deemed necessary.