AIM  7110.65R CHG 2 AIM 8/15/19 3/15/07 1/30/20 2. Observations & Warnings (Obs/Warn). The Obs/Warn option provides an option to display weather data for the current time and the previous 14 hours (rounded to the nearest hour). Users may advance through time using the arrow buttons or by clicking on the desired hour. Provided below are the Obs/Warn product tabs available on the GFA website: (a) METAR (b) Precipitation/Weather (PCPN/WX) (c) Ceiling & Visibility (CIG/VIS) (d) Pilot Reports (PIREP) (e) Radar & Satellite (RAD/SAT) 3. The GFA will be continuously updated and available online at  http://aviationweather.gov/gfa . Upon clicking the link above, select INFO on the top right corner of the map display. The next screen presents the option of selecting Overview, Products, and Tutorial. Simply select the tab of interest to explore the enhanced digital and graphical weather products designed to replace the legacy FA. Users should also refer to AC 00 − 45,  Aviation Weather Services,  for more detailed information on the GFA. 4. GFA Static Images.  Some users with limited internet connectivity may access static images via the Aviation Weather Center (AWC) at: http://www.aviationweather.gov/gfa/plot . There are two static graphical images available, titled Aviation Cloud Forecast  and  Aviation Surface Forecast . The Aviation Cloud Forecast provides cloud coverage, bases, layers, and tops with Airmet Sierra for mountain obscuration and Airmet Zulu for icing overlaid. The Aviation Surface Forecast provides visibility, weather phenomena, and winds (including wind gusts) with Airmet Sierra for instrument flight rules conditions and Airmet Tango for sustained surface winds of 30 knots or more overlaid. These images are presented on ten separate maps providing forecast views for the entire CONUS on one and nine regional views which provide more detail for the user. They are updated every 3 hours and provide forecast snapshots for 3, 6, 9, 12, 15, and 18 hours into the future. (See FIG 7 − 1 − 2 and FIG 7 − 1 − 3.) FIG 7 − 1 − 2 Aviation Surface Forecast 7 − 1 − 6 Meteorology