Weather Flashcards
TAF stands for
Terminal aerodrome forecast
TAF reporting periods and area
4 times a day every 6hrs 5sm radius from center of runway complex Valid for 30hrs
FA stands for
Area Forecast
FA reporting periods and location
3 times a day every 8hrs good for 12hrs for clouds/weather and outlook for an additional 6hrs several states
Winds aloft forecast every
4hrs
WA-no wind indication means
if airport is within 1500 of altitude
WA-No temp indication means
elevation is within 2500 of station
WA- 9900 means
Winds variable
WA-negative not indicated on altitudes
24000 and above
WA- 100-199knts wind indicated
subtract 50 from direction and add 100 to speed
Airmet issued for.. Types.
Weather dangerous to light/limited aircraft -Sierra-ifr and mountain obstruction -Tango-moderate turbulence sustained wind surface at 30 or more and nonconvective low level windshear -Zulu-Moderate icing and freezing levels scheduled 4 times a day every 6hrs and unscheduled as neccessary valid for 6hrs
SIGMET issued for..
weather potentially dangerous to all airmen and aircraft -severe or greater turbulence -clear air turbulence -sever icing -wide spread dust or san storm -volcanic ash unscheduled but valid for 4 hrs
Convective SIGMET for..
-thunderstorms -severe or greater turbulence -severe icing -low level wind shear -tornadoes and large hail which is 3/4 or greater at surface and winds greater than 50 at the surface -heavy precipitation. issued hourly and good for 2hrs
Surface Prognostic Charts issued periods
Current and is issued 8times a day
Milibars Standard is
1013.2mb