IR.I.B.K3dFAA-S-ACS-8C · Nov 2023Knowledge
d. Moisture/precipitation
Meteorology applicable to the departure, en route, alternate, and destination for flights conducted under Instrument Flight Rules (IFR) to include expected climate and hazardous conditions such as: d. Moisture/precipitation
Bottom line
Pilots should also be alert for any reported or forecast icing if the aircraft is not certified for operating in icing conditions. Flying into areas of icing or weather below minimums could have disastrous results.
Key numbers
| Number | What it means |
|---|---|
| 15 to 20 minutes old by the time data sets are assembled and displayed in a cockpit | NEXRAD age |
| significant changes expected within 1 hour before and after the ETA | Destination forecast |
FAA references
- AC 91-92, paras. 7.4.1.1, 7.6, 7.7 — AC No: 91-92
- AWH ch. 3 (p. 3-3) — FAA-H-8083-28A
- PHAK ch. 13 (p. 13-2) — FAA-H-8083-25C (2023)
- AFH — FAA-H-8083-3C
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