AV27: Impact of Weather Phenomena - DC

Question 1

What are the impacts of wind on aviation?

Answer 1

• Cross Wind factor affects landing and takeoffs
• Wind shift could affect preferred runway
• strong wind with low temps could cause wind chill limitations on equipment and workers
• BLSN / BLDU / DRSN
• longer taxi distances / time
• greater mechanical turbulence
• Possible low level wind shear

Question 2

What are the impacts of turbulence on aviation?

Answer 2

• Aircraft control problems
• rerouting and delays possible
• possible missed approaches and aborted takeoffs
• departure delays / cancellations
• passenger discomfort

Question 3

What are the impacts of low level wind shear on aviation?

Answer 3

• Missed approaches / aborted takeoffs
• Loss of aircraft control at a critical stage
• increased aircraft spacing
• cessation of takeoffs and landings
• passenger discomfort

Question 4

What are the impacts of icing on aviation?

Answer 4

• Changes aerodynamic performance of the aircraft
• delays due to de-icing
• diversions
• additional fuel costs
• crowded terminal buildings due to delays

Question 5

What are the impacts of precipitation on aviation?

Answer 5

• reduced visibilities for cockpits and vehicles
• reduced braking action
• possible hydroplaning
• passenger delays
• possibly paired with high winds (blizzard)
• limit the ability for aircraft and vehicles to see airside lighting and signage
• personnel safety risk on movement areas

Question 6

What are the impacts of IFR conditions on aviation?

Answer 6

• limits or precludes VFR ops
• ATC restrictions slows flow of traffic
• increased FSS-ATC coordination required
• possible CFIT
• increased fuel requirements due to longer approach times and alternate availability
• extra ops costs

Question 7

What does CFIT stand for?

Answer 7

Controlled Flight Into Terrain

Question 8

What are the impacts of convective activity on aviation?

Answer 8

• increased risk of dangerous weather
• no refuelling in lightning situations
• could cause all takeoffs and landings to cease
• significant delays due to rerouting around cells and holding patterns
• passenger discomfort

Question 9

What are the impacts of density altitude on aviation?

Answer 9

• increase takeoff distance required to clear obstacles

- higher MOCA altitudes required.

Question 10

What is density altitude?

Answer 10

Pressure altitude corrected for temperature