Shapefiles

Product Description Abstract: This polygon shapefile, which covers the contiguous United States and surrounding waters, identifies areas of potential aircraft icing and icing type and severity based on advisories from the National Weather Service Aviation Weather Center. AIRMET icing shapefiles are updated hourly. Purpose: This shapefile can be used to plan flight routes and manage aircraft around

Product Description Abstract: This polygon shapefile, which covers the contiguous United States and surrounding waters, identifies areas of atmospheric turbulence and turbulence severity based on advisories from the National Weather Service Aviation Weather Center. AIRMET turbulence shapefiles are updated hourly. Purpose: This shapefile can be used to plan flight routes and manage aircraft around atmospheric turbulence threats.

Product Description Abstract: This polygon shapefile, which covers the contiguous United States and surrounding waters, identifies areas of low cloud ceilings, low surface visibilities or mountain tops obscured by clouds based on advisories from the National Weather Service Aviation Weather Center. AIRMET IFR/Mountain Obscuration shapefiles are updated hourly. Purpose: This shapefile can be used to plan flight

Product Description Abstract: This polygon shapefile, which covers the contiguous United States and surrounding waters, identifies widespread areas of potentially hazardous high-level flight weather (other than convective activity), including severe icing, severe or extreme turbulence, reduced visibility from dust storms and sandstorms, and volcanic ash. It is based on advisories from the National Weather Service Aviation

Product Description Abstract: This polygon shapefile, which covers the contiguous United States and surrounding waters, identifies areas of potential thunderstorm activity based on advisories from the National Weather Service Aviation Weather Center. Convective SIGMET shapefiles are updated hourly. Purpose: This shapefile can be used to plan flight routes and manage aircraft around thunderstorm threats. Description: DTN decodes and

Product Description Abstract: This polygon shapefile represents potential areas of ash generated by active volcanoes around the world. It is produced from bulletins create by regional Volcanic Ash Advisory Centers (VAAC) and updated by DTN once each hour. Purpose: This shapefile can be used to plan flight routes and manage aircraft around volcano threats. Description: This polygon shapefile

Product Description Abstract: These polygon shapefiles identify worldwide forecast tropopause height contours at 6, 12, 18 and 24 hours into the future based on modeled weather data. Tropopause height forecast shapefiles are updated every 6 hours. Purpose: These shapefiles can be used to plan flight routes and manage aircraft around high-altitude performance threats. Description: These worldwide polygon shapefiles

Product Description Abstract: These polyline shapefiles identify worldwide forecasts of jet steam axis locations at 6, 12, 18 and 24 hours into the future based on analyses of upper level wind products by DTN meteorologists. Jet stream forecast shapefiles are updated every 6 hours. Purpose: These shapefiles can be used to plan flight routes and manage aircraft

Product Description Abstract: These polygon shape files depict the lowest flight rules (the combination of cloud ceilings and surface visibility) forecast during each of the next 1, 2, …, 23 hours. The forecasts are created by DTN meteorologists, and are updated every hour. Purpose: These shapefiles can be used for flight planning, airport and helicopter operations, and

Product Description Abstract: These point shapefiles identify forecast worldwide locations of currently active tropical systems at 6, 12, 18 and 24 hours into the future. Tropical cyclone forecast locations are updated every 6 hours. Purpose: These shapefiles can be used to plan flight routes and manage aircraft around tropical storm threats. Description: This worldwide point shapefile contains locations