Visual Mode

• WPC Prog Chart: fronts and surface pressure for the departure window. We show the published chart whose valid time is nearest your departure (in UTC), taking the earlier one on an exact tie. Days 3 to 7 use the 12Z-only WPC Day N charts, which show fronts and isobars only with no precipitation shading, and the caption says so. Nearer leads use AWC prog frames with an F-hour. For flights departing within 6 hours, this is replaced by the WPC Surface Analysis (current fronts are more accurate than a near term forecast chart).
• Prog chart caption: for about the next two days the chart comes from aviationweather.gov, which rewrites its files every three hours and not every file each time. PlaneWX checks when each file was last written. When that check is current, the caption shows the valid day and hour, for example Fri 18Z · F24. In the first minutes after a rewrite, or when the check is missing or out of date, the hour is hidden: the caption reads Fri Oct 2 · hour on chart · F24 when the date is certain, or Valid time on chart · F24 when it is not. The valid time printed on the chart itself is always correct.
• WPC Surface Analysis — always present as the second slide (or the only slide for near-term departures), showing real-time fronts and pressure systems.

• AWC Aviation Clouds Forecast (GFA) — the FAA's official Graphical Forecasts for Aviation cloud coverage chart, time-matched to your departure.
• G-AIRMET Sierra — IFR conditions and mountain obscuration advisory, time-stepped to the nearest valid period.

Available within 18 hours of departure. For flights farther out, a horizon notice is shown.

• GTG Total Turbulence — AWC's Graphical Turbulence Guidance "total" product at your cruise altitude (snapped to the nearest available pressure level). Covers clear-air, mountain wave, and convective turbulence.
• G-AIRMET Tango-H / Tango-L — moderate turbulence advisories above and below FL180, time-stepped to your window.

GTG available within 18 hours. G-AIRMET within 12 hours. Horizon notices appear when products aren't yet available for your window.

• FIP / CIP — Forecast Icing Potential first when departure is more than an hour out; Current Icing Product first inside that hour. Both are cruise-altitude probability charts, snapped to the nearest published level.
• Max icing w/SLD — AWC column-max severity plus supercooled large droplets (Level=MAX, Field=SEVSLD), matched to the same forecast hour, before the official chart.

Available within 18 hours of departure.

• G-AIRMET Sierra — IFR conditions and mountain obscuration, time-matched to your departure window.

Available within 12 hours of departure.