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
ATIS stands for.. issued periods
Automated Terminal Information System 1hour
ASOS stands for.. issued periods
Automated Surface Observing System Minute by minute
AWOS stands for.. issued periods
Automated Weather Observing System Minute by minute
Winds flow from..
High to Low
High pressure flow..
down and to the right
Low pressure flow..
up and to the left
Coriolis Force deflects air to the.. in the northern hemisphere.
right
Microburst is..
most common in thunderstorm. is a severe downdraft up to 6000fpm and most severe low level wind shear type
3 stages of thunderstorms
-cumulous -mature -dissapating
To form a thunderstorm needs..
-lifting action -high humidity -unstable
Cloud Categories -low -medium -high -clouds with extensive vertical developement
-stratus sfc-6500agl -alto-6500 to 20000agl -sirius-above 20000agl -towering cumulous,cumulonibus-
Avoid thunderstorms by..
20nm
Fog is..
cloud within 50ft of surface and happens when temp and dew point are rather close
METAR stands for and issued
Aviation routine weather report every hour
FOG types: RAIS UP
-radiation -advection -ice -steam -upslope -precipitation
