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METAR & TAF definitions
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AO1: Automated Observation without precipitation discriminator (rain/snow)
AO2: Automated Observation with precipitation discriminator (rain/snow)
AMD: Amended Forecast (TAF)
BECMG: Becoming (expected between 2 digit beginning hour and 2 digit ending hour)
BKN: Broken 5-7 octas (eighths) cloud coverage
CLR: Clear at or below 12,000 feet (ASOS/AWOS report)
COR: Correction to the observation
FEW: 1 or 2 octas (eighths) cloud coverage
FM: From (4 digit beginning time in hours and minutes)
LDG: Landing
M: In temperature field means "minus" or below zero
M: In RVR listing indicates visibility less than lowest reportable sensor value (e.g. M0600)
NO: Not available (e.g. SLPNO, RVRNO)
NSW: No Significant Weather. Note: NSW only indicates obstruction to visibility or precipitation previously noted has ended. Low ceilings, wind shear, and other weather conditions may still exist.
OVC: Overcast 8 octas (eighths) cloud coverage
P: In RVR indicates visibility greater than highest reportable sensor value (e.g. P6000FT)
P6SM: P6SM Visibility greater than 6 SM (TAF only)
PK: WND Peak wind
PROB40: Probability 40 percent
R: Runway (used in RVR measurement)
RMK: Remark
RY/RWY: Runway
SCT: Scattered 3-4 octas (eighths) cloud coverage
SKC: Sky Clear
SLP: Sea Level Pressure (e.g., 1001.3 reported as 013)
SM: Statute mile(s)
SPECI: Special Report
TEMPO: Temporary changes expected (between 2 digit beginning hour and 2 digit ending hour)
TKOF: Takeoff, T01760158, 10142, 20012 and 401120084. In Remarks-examples of temperature information
V: Varies (wind direction and RVR)
VC: Vicinity
VRB: Variable wind direction when speed is less than or equal to 6 knots
VV: Vertical Visibility (Indefinite Ceiling)
WS: Wind shear (In TAFs, low level and not associated with convective activity)
Descriptors
BC: Patches
BL: Blowing
DR: Low Drifting
FZ: Supercooled/freezing
MI: Shallow
PR: Partial
SH: Showers
TS: Thunderstorm
Weather Phenomena
BR: Mist
DS: Dust Storm
DU: Widespread Dust
DZ: Drizzle
FC: Funnel Cloud
+FC: Tornado/Water Spout
FG: Fog
FU: Smoke
GR: Hail
GS: Small Hail/Snow Pellets
HZ: Haze
IC: Ice Crystals
PE: Ice Pellets
PO: Dust/Sand Whirls
PY: Spray
RA: Rain
SA: Sand
SG: Snow Grains
SN: Snow
SQ: Squall
SS: Sandstorm
UP: Unknown Precipitation (Automated Observations)
VA: Volcanic Ash
Cloud Types
CB: Cumulonimbus
TCU: Towering Cumulus
Intensity Values
(-): Light
No Sign: Moderate
(+): Heavy |
Flying Network Staff
staff@studentpilot.com
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