Metro-02
Meteorology and Flight Planning
VC
Vicinity
AO1
Automated Observation without
VRB
Variable wind direction
precipitation discriminator (rain/
when speed is less than
snow)
or equal to 6 kts
AO2
Automated Observation with
VV
Vertical Visibility
precipitation discriminator (rain/
(Indefinite Ceiling)
snow)
WS
Wind shear (In TAFs,
AMD
Amended Forecast (TAF)
low-level and not
BECMG
Becoming (expected between 2-digit
associated with
beginning hour and 2-digit ending
convective activity)
hour
BKN
Broken 5-7 octas (eighths) cloud
DESCRIPTORS
coverage
BC
Patches
CLR
Clear at or below 12,000 ft (ASOS/
BL
Blowing
AWOS report)
DR
Low Drifting
COR
Correction to the observation
FZ
Supercooled/freezing
FEW
>0-2 octas (eighths) cloud coverage
MI
Shallow
FM
From (4-digit beginning time in hours
PR
Partial
and minutes)
SH
Showers
LDG
Landing
TS
Thunderstorm
M
In temperature field, means "minus"
or below zero
WEATHER
PHENOMENA
M
In RVR listing, indicates visibility
BR
Mist
less than lowest reportable sensor
DS
Dust Storm
value (e.g., M0600)
DU
Widespread Dust
NO
Not available (e.g., SLPNO,
DZ
Drizzle
RVRNO)
FC
Funnel Cloud
NSW
No Significant Weather
+FC
Tornado/Water Spout
NOTE: NSW only indicates
FG
Fog
obstruction to visibility or
FU
Smoke
precipitation previously noted has
GR
Hail
ended. Low ceilings, wind shear,
GS
Small Hail/Snow Pellets
and other weather conditions may
HZ
Haze
still exist.
IC
Ice Crystals
OVC
Overcast 8 octas (eighths) cloud
PE
Ice Pellets
coverage
PO
Dust/Sand Whirls
P
In RVR, indicates visibility greater
PY
Spray
than highest reportable sensor value
RA
Rain
(e.g., P6000FT)
SA
Sand
P6SM
Visibility greater than 6 SM (TAF
SG
Snow Grains
only)
SN
Snow
PK WND
Peak wind
SQ
Squall
PROB40
Probability 40 percent
SS
Sandstorm
R
Runway (used in RVR
UP
Unknown Precipitation
measurement)
(Automated
RMK
Remark
Observations)
RY/RWY
Runway
VA
Volcanic Ash
SCT
Scattered 3-4 octas (eighths) cloud
coverage
CLOUD TYPES
SKC
Sky Clear
CB
SLP
Sea Level Pressure (e.g., 1001.3
TCU
Towering Cumulus
reported as 013)
SM
Statute mile(s)
INTENSITY
VALUES
SPECI
Special Report
-
Light
TEMPO
Temporary changes expected
no sign
Moderate
(between 2-digit beginning hour and
+
Heavy
2-digit ending hour)
TKOF
Takeoff
T01760158, 10142, 20012 and 401120084 In
Remarks -- examples of temperature
information
V
Varies (wind direction and RVR)
Figure 11: METAR ABBREVIATIONS
(7-97) Original
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