At Hawaiʻi Volcanoes National Park (HVNP), elevated vog conditions are most common when trade winds are absent. Current air quality and wind conditions can be checked online prior to visiting the park (see link below). Those with pre-existing respiratory conditions should have their medications available when visiting the park, as SO2 concentrations can reach unhealthy levels very quickly, in some areas of the park. Pay attention to park warnings and follow park advisories (link below).
Map showing approximate location of the Halemaʻumaʻu and Puʻu ʻŌʻō gas plumes in HVNP, SO2 concentrations (ppm) at nine locations, and PM2.5 at two locations in the park.
Graphical and table displays of air quality (SO2, PM2.5), weather and webcams in HVNP
Explanation of how air quality affects HVNP and what NPS is doing to monitor and evaluate air quality in the Park