$	maintenance check indicator

-	light intensity

+	heavy intensity

/	indicator that visual range data follows; separator
        between temperature and dew point data.

ACC	altocumulus castellanus

ACFT MSHP	aircraft mishap

ACSL	altocumulus standing lenticular cloud

ALP	airport location point

AO1	automated station without precipitation discriminator

AO2	automated station with precipitation discriminator

APRNT	apparent

APRX	approximately

ATCT	airport traffic control tower

AUTO	automated report

B	began

BC	patches

BKN	broken

BL	blowing

BR	mist

C	center (with reference to runway designation)

CA	cloud-air lightning

CB	cumulonimbus cloud

CBMAM	cumulonimbus mammatus cloud

CC	cloud-cloud lightning

CCSL	cirrocumulus standing lenticular cloud

CG	cloud-ground lightning

CHI	cloud-height indicator

CHINO	sky condition at secondary location not available

CIG	ceiling

CLR	clear

CONS	continuous

COR	correction to a previously disseminated report

DOC	Department of Commerce

DOD	Department of Defense

DOT	Department of Transportation

DR	low drifting

DS	duststorm

DSNT	distant

DU	widespread dust

DZ	drizzle

E	east, ended

FAA	Federal Aviation Administration

FC	funnel cloud

FEW	few clouds

FG	fog

FIBI	filed but impracticable to transmit

FIRST	first observation after a break in coverage at manual station

FMH-1	Federal Meteorological Handbook No.1, 
	Surface Weather Observations & Reports

FMH-2	Federal Meteorological Handbook No.2, 
	Surface Synoptic Codes

FROPA	frontal passage

FRQ	frequent

FT	feet

FU	smoke

FZ	freezing

FZRANO	freezing rain sensor not available

G	gust

GR	hail

GS	small hail and/or snow pellets

HZ	haze

IC	ice crystals, in-cloud lightning

ICAO	International Civil Aviation Organization

KT	knots

L	left (with reference to runway designation)

LAST	last observation before a break in coverage at a manual station

LST	Local Standard Time

LTG	lightning

LWR	lower

M	minus, less than

METAR	aviation routine weather report

MI	shallow

MOV	moved/moving/movement

MT	mountains

N	north

N/A	not applicable

NCDC	National Climatic Data Center

NE	northeast

NOS	National Ocean Service

NOSPECI	no SPECI reports are taken at the station

NW	northwest

NWS	National Weather Service

OCNL	occasional

OFCM	Office of the Federal Coordinator for Meteorology

OVC	overcast

OHD	overhead

P	greater than

PE	ice pellets

PK WND	peak wind

PNO	precipitation amount not available

PO	dust/sand whirls (dust devils)

PR	partial

PRESFR	pressure falling rapidly

PRESRR	pressure rising rapidly

PWINO	precipitation identifier sensor not available

PY	spray

R	right (with reference to runway designation)

RA	rain

RVR	Runway Visual Range

RVRNO	RVR system not available

RWY	runway

S	south

SA	sand

SCSL	stratocumulus standing lenticular cloud

SCT	scattered

SE	southeast

SFC	surface

SG	snow grains

SH	shower(s)

SKC	sky clear

SLP	sea-level pressure

SLPNO	sea-level pressure not available

SM	statute miles

SN	snow

SNINCR	snow increasing rapidly

SPECI	an unscheduled report taken when certain criteria have been met

SQ	squalls

SS	sandstorm

SW	southwest

TCU	towering cumulus

TS	thunderstorm

TSNO	thunderstorm information not available

TWR	tower

UP	unknown precipitation

UTC	Coordinated Universal Time

V	variable

VA	volcanic ash

VC	in the vicinity

VIS	visibility

VISNO	visibility at secondary location not available

VRB	variable

VV	vertical visibility

W	west

WG/SO	Working Group for Surface Observations

WMO	World Meteorological Organization

WND	wind

WSHFT	wind shift

Z	zulu, i.e., Coordinated Universal Time

Note 1: The abbreviations, acronyms, contractions, and symbols included
        in this appendix are defined in accordance with their usage in
        this Handbook.