Westher Forecasts And Reports Flashcards
Examples of forecast
GRARFOR, TAF, TREND, SIGMET
Examples of reports
METAR, SPECI, SIGMET, ATIS
SIGMET VALIDITY Period
4hrs
GRAFOR
Low level graphical aviation forecast
SFC-fl100
Issued twice a day in set of three covering 18 hours
Issue 1 at 1100z valid for 1800, 0000, 0600z
Issue 2 at 2100z valid 0000,0600,1200z
AAW
Wind
Amsl
Issued twice a day with grafor
Intl TAF
8km radius (sometimes 16)
Valid for 24 hours
Updates every 6hr from 0300
Domestic TAF
8km radius some 16
Valid for 14 hrs
Heights in feet above Aerodrome leve,
Metar
On the hour
Automatic issued every half hour
NCD does not mean SKC
feet above Aerodrome level
Speci
Issued in metar code not on the hour
Only in military Aerodrome
COR means corrected
Trend
Amendment indicating significant changes in next 2 hours
ATIS
Degrees magnetic
AIREP
Pilot reports of severe weather
FM TL AT
From till at
Part of TREND
Metar taf ATIS
Metar and taf in true°
ATIS in magnetic°