Federal Meteorological Handbook No. 1



$        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.

National Weather Service