1 / 33

Aviation Hazards They Didn’t Tell You About

Aviation Hazards They Didn’t Tell You About. Aviation Forecasting Tips From a Pilot. Density Currents, Waves and Bores; Little Known Hazards to Aviation. Necessary Bore Ingredients. 1. Stable boundary layer w/ inversion to act as a ducting mechanism. 2. Something to disturb the stable layer.

katy
Download Presentation

Aviation Hazards They Didn’t Tell You About

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Aviation Hazards They Didn’t Tell You About Aviation Forecasting Tips From a Pilot

  2. Density Currents, Waves and Bores; Little Known Hazards to Aviation

  3. Necessary Bore Ingredients • 1. Stable boundary layer w/ inversion to act as a ducting mechanism. • 2. Something to disturb the stable layer. • Gravity Wave • Density Current • Front acting as density current

  4. Bore Characteristics • 1. Undular bore or standing wave/s • One or more successive, parallel waves. • Breaking waves are rare. c. Not necessarily associated with a density or gravity current. d. Most common aviation hazard = wind shear when low level jet present.

  5. Density/Gravity Current Characteristics • 1. Density/Gravity Currents a. Kelvin-Helmholtz instabilities. b. Elevated mixing head (flow dependent). c. Turbulent mixing head (flow dependent). d. Coexisting Bore type (flow dependent) Bore may outrun current. e. Wind shear presence (flow dependent). f. Seldom visible! g. Most common aviation hazard = turbulence.

  6. Kelvin-Helmholtz Instabilities Elevated Head

  7. Density/Gravity Current Flow Dependencies

  8. Common High Plains Events

  9. Hazard to Aviation

  10. Suggested TAF Procedure • Since both turbulence and wind shear are possible there is no provision in the current TAF code to describe the hazard. However, inclusion of a low level wind shear remark will alert the pilot to the presence of at least part of the flight hazard even if wind shear criteria are not met.

  11. TAF Tips From A Pilot

  12. Don’t try to forecast conditions that do not change flight categories! • Scattered layers above 1,000’ • Wind direction changes for speeds below 12kts • Ceiling changes in the MVFR and above range • Don’t go bananas over TSRA!! We can fly around them or wait till they move away!

  13. More TIPS… • Questions to ask yourself… • How often does the terminal go IFR or lower in TSRA? • How long does it normally last? • What is more important to the pilot – low CIGS or LOW VSBYS? • What will the pilot do if he/she arrives at the terminal to discover un-forecast IFR conditions in TSRA?

  14. More TIPS • What are the minimums for the terminal with respect to wind direction?! • Which runways have ILS-GS? • What constitutes a difficult cross wind? • Why close the airport to VFR traffic unless you are absolutely certain?!

  15. Check Out This TAF FM0100 18014G24KT P6SM BKN060 OVC200 TEMPO 0104 1/2SM -TSRA OVC006CB FM0600 27012KT P6SM SCT080 SCT200 FM0900 31008KT P6SM BKN200 FM1300 34006KT P6SM BKN200 FM1800 34006KT P6SM SCT060 BKN200

  16. For the Pilot… FM0100 18014G24KT P6SM BKN060CB OVC200 TEMPO 0104 –TSRA FM0600 27012KT P6SM SCT080 SCT200

  17. Questions??

More Related