CA.I.C.K2gFAA-S-ACS-7B · Nov 2023Knowledge
g. Inflight Aviation Weather Advisories including Airmen's Meteorological Information (...
Acceptable weather products and resources required for preflight planning, current and forecast weather for departure, en route, and arrival phases of flight such as: g. Inflight Aviation Weather Advisories including Airmen's Meteorological Information (AIRMET), Significant Meteorological Information (SIGMET), and Convective SIGMET
Bottom line
Inflight weather advisories are forecasts that detail potentially hazardous weather, provided to en route aircraft and also available to pilots before departure for flight planning. An inflight weather advisory is issued as an AIRMET, SIGMET, or convective SIGMET.
Key numbers
| Number | What it means |
|---|---|
| every 6 hours, with intermediate updates as needed for a particular area forecast region | AIRMET cycle |
| CONUS, Alaska, and Hawaii; none for U.S. Oceanic FIRs | AIRMET coverage |
| three: the AWC, the AAWU, and the WFO Honolulu | US MWOs |
| 48 conterminous states | HIWAS area |
FAA references
- PHAK ch. 13 (p. 13-11) — FAA-H-8083-25C (2023)
- AWH ch. 26 (p. 26-15) — FAA-H-8083-28A
- AWH ch. 26 (p. 26-2) — FAA-H-8083-28A
- PHAK ch. 13 (p. 13-4) — FAA-H-8083-25C (2023)
- AWH ch. 2 (p. 2-3) — FAA-H-8083-28A
- AC 91-92, paras. 7.6, 7.7 — AC No: 91-92
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