◠◠◠ Cumulonimbus area (scalloped) · qualifier ISOL / OCNL / FRQ, base/top FL

━▶ Jet stream axis · core FL and max speed (kt)

[FL450] Tropopause height (flight level)

╌╌ Severe icing area · base/top FL

╌╌ Moderate/severe turbulence · base/top FL

▲ Active volcano (VA — volcanic ash risk)

• SigWx city (airport, IATA code)

┄┄ Fog risk area (probability ≥ 40 %)

╌╌ Cloud ceiling: IFR < 1000 ft · MVFR 1000–3000 ft AGL

●●●● METAR/TAF flight category: VFR · MVFR · IFR · LIFR