Weather Questions 2 Flashcards
OCNL EMBD CB indicates
1/8 to 4/8 coverage.
450/XXX indicates
the tops at FL450 and bases below FL240.
in the Winds and Temperatures Aloft Forecast (FD): When is the temperature at one of the forecast altitudes omitted at a specific location or station
When no temperatures are forecast for the 3,000’ level or any level within 2,500’ of station elevation.
Test data: ice, snow, or frost having a thickness and roughness similar to medium or coarse sandpaper
on the leading edge and upper surface of an airfoil can RESULTS?
reduce lift by as much as 30 percent
increase drag by 40 percent.
Where does wind shear occur?
With either a wind shift or a wind speed gradient at any level in the atmosphere.
Temperature 11 C is more than expected, moisture is_____
doubled
Wind is southerly and stronger that expected, In west weather is
worst
Terminal Aerodrome Forecast length
24 to 30 hours
Does the type of aircraft matter for PRIEP reports
yes
What does a sigmet include?
Weather Condition
Sever icing
Server or extreme clear turbulence
Dust and sand storms
What does convective sigmets include?
Thunderstorms
What is the first step when planning the flights?
Know Lows and Highs
What are the reports that you have to look?
Metars Prieps Radar Airmets Sigmets
Life stage of a thunderstorm?:
1) Cumulus
2) Mature (precipitation)
3) Dissipating (downdrafts)
Distance of a thunderstorm gust
15-20miles
Distance to stat away from a thunderstorm
5-20 miles
How does an anvil happen?
Small cumulus cloud+ Warm air raises with updraft+ Spreads
What are the two ways to recieve data links?
ADS-B Ground Based
Siruis X Satellite
When planning with weather, Golden Rules
1) Start with big picture
2) Remember that weather is delayed 15-20mins
3) Deviate around the weather systems
4) Use all weather resources
5) Eyes are the winners
6) Always ask if the weather is convective
4 elements to consider on a radar?
1) Shape
2) Intensity
3) Gradient
4) Height
Do you need to get the cloud tops?
Yes
What is the general ILS visibility DA?
1/2 Miles and 1800 RVR with DA 200 AGL
What is the general Non pricision MDA and visibility
1/2 and 1mile
MDA 400-600
In icing don’t or do use the flaps during approach
don’ts
What are the ice protection systems?
Boot System
Propeller reheating elements
Anti ice fluid discharge at propeller
Fluid or electronically heated windshield
Greatest turbulence is found inside or outside of a thunderstorms
outside
Propeller vertical gust tolerance
30-50 ft per second
What does a thunderstorm need?
1) lifting
2) moisture
3) Instability
2 thunderstorm types
1) airmass (lifting with heating)
2) frontal
Where do you find the embedded thunderstorms?
stationary or warm frontal zones
