These are used in numerical models by the National Weather Service.
Text messages provide information for selected cities in North America.
Volcanic Ash Advisory Statements . Ash plumes injected into the atmosphere pose dangers to aircraft flying through them. Using numerical model data, a Volcanic Ash Forecast Transport and Dispersion is produced by the National Weather Service. This information is provided to the Federal Aviation Administration, U.S. Geological Survey, to climate analysts, and scientists in other countries. Wildfire Detection .