AA.I.C.K3hFAA-S-ACS-11A · Nov 2023Knowledge
h. Thunderstorms and microbursts
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: h. Thunderstorms and microbursts
Bottom line
Convective SIGMETs are one of the weather advisories listed under the adverse conditions element of a briefing. NEXRAD mosaic data can be 15 to 20 minutes old by the time it is assembled and displayed in a cockpit, and this latency may hinder interpretation of convection-related weather information.
Key numbers
| Number | What it means |
|---|---|
| 15 to 20 minutes old in the cockpit | NEXRAD latency |
| departure time 6 hours or more away | Outlook window |
| significant changes within 1 hour before and after the ETA | ETA window |
FAA references
- AC 91-92, paras. 7.4, 7.5, 7.6, 7.7 — AC No: 91-92
- AC 91-92 Appendix A — AC No: 91-92
Build understanding you can use
Unlock the full lesson and continue studying this element.
- Full teaching sections: What it is; Key points; How it is done
- Check your understanding with answers you can reveal
- Common mistakes paired with the FAA facts that correct them