Metar codes

AO1

Automated Observation without precipitation discriminator (rain/snow)

AO2

Automated Observation with precipitation discriminator (rain/snow)

AMD

Amended Forecast

BECMG

Becoming (expected between 2 digit beginning hour and 2 digit ending hour)

BKN

Broken

CLR

Clear at or below 12,000 feet (AWOS/ASOS 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(temp)

In temperature field means "minus" or below Zero

M(rvr)

In RVR listing indicates visibility less than lowest reportable sensor

NO

Not available (eg SLPNO, RVRNO)

NSW

No Significant Weather

OVC

Overcast

P(rvr)

in RVR indicates visibility greater than highest reportable sensor value

PROB

Probability

R

Runway

RMK

Remark

RY/RWY

Runway

SCT

Scattered

SKC

Sky Clear

SLP

Sea Level Pressure (eg., 1013 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

V

Varies

VC

Vicinity

VRB

Variable wind direction when speed is less than or equal to 6 knots

VV

Vertical Visibility

WS

Wind shear

TS

Thunderstorm

A2995

Altimeter - Barometric Pressure preceded

PK

Peak

VIS

Prevailing Visibility

RA

Rain

BR

Baby Rain

+

Heavy

-

Light

HZ

haze

FU

Smoke

DU

dust, smog

VA

Volcanic Ash

PK_WND

Peak Wind

BINOVC

Breaks in Overcast-denotes a few, small clear patches in the overcast sky

TWR_VIS

Tower Visibility

SFC_VIS

Surface Visibility

LTG-CG

Lightning Cloud to ground

LTG-IC

Lightning Intracloud

T00081016

Temp 0.8C Dew -1.6C

T00080016

Temp 0.8C Dew 1.6C

T10081016

Temp -0.8C Dew -1.6C

FRQ

Frequent

LTG

Lightning

FZ

Frozen

DZ

Drizzle

B

Began

E

Ended

LTG-CC

Lightning Cloud to Cloud

LTG-CA

Lightning Cloud to Air

OCNL

Occasional

CONS

Continuous

OHD

Overhead

ALQDS

All Quadrants

DIR

Direction

GR

Hail

CB

Cumulonimbus

CBMAM

Cumulonimbus Mammatus

TCU

Towering cumulus

ACC

Altocumulus castellanus

CLD

Standing lenticular or Rotor clouds

PRESRR

Pressure Rising Rapidly

PRESFR

Pressure Falling Rapidly

ACFT_MSHP

Aircraft Mishap

SNINCR

Snow Increasing Rapidly

P####

Hourly Precipitation Amount

Tsn###sn###

Temp
sn=Type (0=above zero celcius, 1=below zero celcius)
###=celcius temperature to nearest tenth of a degree

$

Ignore

PWI

Prevailing Winds