Weather

Question 1

What does VFR not recommended mean?

Answer 1

-define VFR, MVFR, IFR, etc.
Marginal VFR (MVFR): Ceilings 1,000 to 3,000 feet and/or visibility is 3-5 miles inclusive

Question 2

What kind of briefings are there?

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Answer 2

-Standard, Abbreviated, Outlook
A standard briefing is requested for flights that are due to depart within six hours, and requires the following information:
Type of flight (VFR or IFR).
Aircraft identification.
Aircraft type
Cruising true airspeed.
Departure airport.
Proposed departure time.
Proposed cruising altitude.
Route of flight.
Destination.
Estimated time en route.
Remarks
Fuel on board
Alternate airport.
An Outlook briefing is requested if your proposed departure time is six hours or more in the future.
And an abbreviated briefing is requested to update an earlier briefing.
Each of these briefings will give you current weather information for airports along your route, forecasts and winds aloft.

Question 3

How far away from a thunderstorm do you need to be?

Answer 3

-20 miles

Question 4

Do you know how high up cumulus clouds get?

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Answer 4

60K

Question 5

AIRMET vs SIGMET(sever-extreme), how many types and how often are they issued?

Answer 5

^ Yes, weather advisories mainly for smaller aircraft. There are 3 types: Zulu, tango and sierra issued every 6 hours.

Question 6

AIRMET Zulu

Answer 6

• mod icing or greater

Question 7

AIRMET Tango

Answer 7

• mod turbulence LLWS, 30kt sus wd@sfc

Possible light-moderate turbulence as well as surface winds of 30 or more knots.

Question 8

AIRMET Sierra - at what ceiling and visibility are they issued

Answer 8

mtn obsc/ ifr condition
Cloud ceilings are at less than 1,000 feet. There is also the possibility of having less than three miles of visibility over half of the affected area, which can result in mountain obscuration.

Question 9

Convective SIGMETS

Answer 9

^ Thunderstorms, Tornadoes, 50kt winds at surface, hail greater than 3/4 inch diameter.

Question 10

What are the stages of a thunderstorm?

Answer 10

Cumulus, mature, and dissipating.

Question 11

What happens during those stages of a thunderstorm?

Answer 11

^ Cumulus is defined by updrafts and lifting action, mature has precipitation with updrafts and downdrafts which makes it the most dangerous, and dissipating is mostly downdrafts.

Question 12

What’s the movement like around a low pressure system?

Answer 12

-Right hand rule, ccw and up