Meteorological Flashcards
What is SIGWX forecast chart ?
Forecast significant wx expected in airspace
FL250-FL650: SIGWX High (SWH)
FL100-FL250: SIGWX Medium (SWM)
When does SIGWX valid for ?
Valid for 00, 06, 12, 18 UTC
When does SWH available ?
SIGWX High
16 hours before validity
When does SWM available?
SIGWX Medium
20 hours before validity
How long is the validity of SIGMET ?
4 hours
for volcanic ash cloud and tropical cyclone: 6hour
How do you use SIGWX chart ?
3 hours before and after the validity time
How long is a TAF valid ?
Max 30 hour
What is the validity of TAF ?
Not less than 6 hours nor more 30 hours
TAF less than 12 hour
How often will it be issued ?
every 3 hour
TAF from 12 to 30 hour
How often will it be issued ?
Every 6 hour