ACFT

aircraft type (ASCII)

ASIZ

aircraft size

CA

cloud amount; octants of the sky covered

CAI1

cloud amount of the first layer

CAI2

cloud amount of the second layer

CAI3

cloud amount of the third layer

CAI4

cloud amount of the fourth layer

CC

cloud cover

CC1

cloud cover; first cloud layer non-ceiling

CC2

cloud cover; second cloud layer non-ceiling

CCH

high cloud cover (0=CLR, 1=SCT, 2=BKN, 3=OVC)

CCL

low cloud cover (0=CLR, 1=SCT, 2=BKN, 3=OVC)

CCM

middle cloud cover (0=CLR, 1=SCT, 2=BKN, 3=OVC)

CG1

genus of the first cloud (ASCII)

CG2

genus of the second cloud (ASCII)

CG3

genus of the third cloud (ASCII)

CG4

genus of the fourth cloud (ASCII)

CH

type of high level clouds (ASCII)

CIG

categorical forecast of the ceiling height

CIGC

cloud cover of the ceiling

CIGH

ceiling height

CL

type of low level clouds (ASCII)

CM

type of middle level clouds (ASCII)

CMAX

number of columns containing data

CO

country ID (ASCII); see the McIDAS-X CCODE command for more information

DAY

year and Julian day

DIR

wind direction

FLV1

first flight level

FLV2

second flight level

GUS

wind gusts

HMS

actual time of the observation

ICE1

first icing code

ICE2

second icing code

ICTP

icing type (ASCII)

ID

station identifier (ASCII)

IDA

part one of a two-part ID (ASCII)

IDB

part two of a two-part ID (ASCII)

IDN

station ID number

IFQ1

first icing frequency (ASCII)

IFQ2

second icing frequency (ASCII)

IL11

first icing base

IL12

first icing top

IL21

second icing base

IL22

second icing top

LAT

latitude, +North ( -90 to +90)

LEV

level: SFC, TRO, or same as P (ASCII)

LLWS

low level wind shear

LON

longitude, +West ( -180 to +180 )

MOD

modification flag (1=modified)

NREC

number of records in a row

OBSV

categorical forecast of obstructions to vision

P

atmospheric pressure

P1

temperature for significant temperature level

P1

wind direction for significant wind level

P2

dew point temperature for significant temperature level

P2

wind speed for significant wind level

P3

pressure for significant temperature level

P3

height for significant wind level

PC

characteristic of pressure tendency

PCP

3-hour precipitation total

PP06

6-hour probability of precipitation

PP12

12-hour probability of precipitation

PRE

pressure

PSD

direction the predominant swell comes from

PSH

height of the predominant swell

PSL

sea level pressure

PSNO

probability of snow

PSP

period of predominant swell

PST

station pressure

PT

3-hour pressure change

PTIM

time period for precipitation

PTYP

precipitation type (ASCII)

PZR

probability of freezing rain

QP06

6-hour quantitative precipitation forecast

QP12

12-hour quantitative precipitation forecast

SN06

6-hour snow probability

SN12

12-hour snow probability

SNO

cumulative snow depth

SPD

wind speed

ST

state ID (ASCII)

STI

insitu sea surface temperature

SV06

6-hour severe weather probability

SV12

12-hour severe weather probability

SWH

height of sea or wind waves

SWP

period of sea or wind wave

T

temperature

TBTP

turbulence type (ASCII)

TD

dew point temperature

TFQ1

first turbulence frequency (ASCII)

TFQ2

second turbulence frequency (ASCII)

TH06

6-hour thunderstorm probability

TH12

12-hour thunderstorm probability

TIME

time

TL11

first turbulence base

TL12

first turbulence top

TL21

second turbulence base

TL22

second turbulence top

TMAX

maximum temperature

TMIN

minimum temperature

TRB1

first turbulence intensity

TRB2

second turbulence intensity

TYPE

type of data

VDAY

Julian day of forecast verification

VIS

visibility

VTIM

time of forecast verification

WX1

weather - first four characters (ASCII)

WX2

weather - second four characters (ASCII)

WXP

present weather type (ASCII)

Z

height above sea level

ZC1

base of the first cloud layer

ZC11

first cloud base

ZC12

first cloud top

ZC2

base of the second cloud layer

ZC21

second cloud base

ZC22

second cloud top

ZC3

base of the third cloud layer

ZC4

base of the fourth cloud layer

ZCB

height of the cloud base

ZCL1

height of the first non-ceiling

ZCL2

height of the second non-ceiling

ZS

surface elevation