AWH 3-26

Chapter 3, Overview of Aviation Weather Information 3-26 Tropical Cyclone Information Contained In: Type Summary TCA T, G TCAs are issued four times daily and report the current and forecast tropical cyclone position and intensity. Forecasts Medium-Level SIGWX G Tropical cyclones are included using standard symbols. High-Level SIGWX G Global forecasts that include tropical cyclones using standard symbols. Surface Prog Charts G Tropical depressions, tropical storms, and hurricanes are included using symbols. AFD T May include a discussion on tropical cyclones when applicable. MIS T A nontechnical discussion of meteorological events (including tropical cyclones) causing or expecting to impact the flow of air traffic across an ARTCC. Tools GFA Tool G Interactive website that includes tropical cyclones, if applicable. Flight Service Interactive Map G Interactive website that includes tropical cyclones, if applicable. 3.4.2.12 Products with Sandstorm/Dust Storm Information Table 3-15. Weather Element: Sandstorm/Dust Storm Type: text (T), graphic (G), image (I), voice (V) Sandstorm/Dust Storm Information Contained In: Type Summary Observations METAR and SPECI (ASOS, AWOS, ATIS) T, G, V SS, DS, BLDU, and BLSA are reported in manual observations, at some augmented observations, but not automated observations. Automated observations may report these as HZ. PIREP T, G, V Included if reported. Radar I Potentially visible on radar. Satellite I Sandstorms/dust storms may be visible on satellite if not obscured by cloud cover. Advisories SIGMET T, G Widespread sandstorms/dust storms (WDSPR DS, WDSPR SS) are conditions that trigger the issuance of a SIGMET. CWA T, G One of the conditions that triggers the issuance of a CWA. Forecasts TAF T, G Included as BLDU, BLSA, DRDU, and DRSA. Aviation Surface Forecast G Derived from the GFA and includes forecasts of obscurations such as sandstorms/dust storms. Low-Level SIGWX G Could be inferred when IFR or MVFR conditions are depicted in desert areas and supported by other products (e.g., METAR, TAF, SIGMET).