National Weather Service Detroit/Pontiac

S - South or southern latitude
SA - Surface observation or Sand
SACSMA - Sacramento Soil Moisture Accounting Model
SAO - Surface observation
SAOS - Surface observations
SAP - As soon as possible
SARPS - Standards and Recommended Practices (ICAO)
SASK - Saskatchewan
SAT - Saturday
SATFY - Satisfactory
SAW -   Preliminary Notification of Forthcoming Watch
SAWRS -    Supplementary Aviation Weather Reporting Station
SB - Southbound
SBCAPE -   CAPE calculated using a Surface based parcel
SBLI -   Lifted Index (LI) calculated using surfaced based parcel
SBND - South bound
SBSD - Subside
SBSDD - Subsided
SBSDNC - Subsidence
SBSDS - Subsides
Sc -   Stratocumulus
SC - South Carolina or Stratocumulus
SCA -   Small Craft Advisory
SCC - Tropical Storm Summary
SCND - Second
SCNDRY - Secondary
SCS -   Spectrum Width Cross Section or Soil Conservation Service
SCSL - Standing lenticular stratocumulus
SCT -   Scattered
SCTD - Scattered
SCTR - Sector
SD -   Storm Data or South Dakota
SDF -   Second-Day Feet
SDM -   Senior Duty Meteorologist or Station Duty Manual
SE - Southeast
SEB - South-eastbound
SEC -   Space Environmental Center, second, or seconds
SEL -   Severe Thunderstorm Watch, Tornado Watch
SEL -   Watch Cancellation
SELS -   SEvere Local Storms Unit
SELY - Southeasterly
SEP - September
SEPN - Separation
SEQ - Sequence
SERN - Southeastern
SEV - Severe (used e.g. to qualify icing and turbulence reports)
SEWD -Southeastward
SFC - Surface
SFD -   State Forecast Discussion
SFERICS - Atmospherics
SFP -   State Forecast Product
SG - Snow Grains
SGFNT - Significant
SGFNTLY - Significantly
SH... - Shower (followed by RA = rain, SN = snow, PE = ice pellets)
SHARP -   Skew-T Hodograph Analysis and Research Program
SHARS -   Subtle Heavy Rainfall Signature
SHEF -   Standard Hydrologic Exchange Format
SHEFPARS -   A software decoder for SHEF Data.
SHFT - Shift
SHFTD - Shifted
SHFTG - Shifting
SHFTS - Shifts
SHLD - Shield
SHLW - Shallow
SHRT - Short
SHRTLY - Shortly
SHRTWV - Shortwave
SHRTWVS - Shortwaves
SHSN -   Snow Shower
SHUD - Should
SHWR - Shower
SHWRS - Showers
SIERNEV - Sierra Nevada
SIG - Signature
SIGMET -   SIGnificant METeorlogical Information
SIGWX - Significant weather
SIMUL - Simultaneous or simultaneously
SKC - Sky clear
SKED - Schedule or scheduled
SLD - Solid
SLGT - Slight
SLGTLY - Slightly
SLO - Slow
SLOLY - Slowly
SLOR - Slower
SLP - Slope
SLPG - Sloping
SLS -   Watch Redefining Statement
SLT - Sleet
SLW - Slow
SLY - Southerly
SM - Statute mile
SMA -   Soil Moisture Accounting Model or Subtropical Forecast/Advisory
SMK - Smoke
SML - Small
SMLR - Smaller
SMPDBK -   The Simplified Dam Break (DAMBRK) Model
SMRY - Summary
SMS - Synchronus meteorological satellite
SMTH - Smooth
SMTHR - Smoother
SMTHST - Smoothest
SMTM - Sometime
SMW -   Special Marine Warning
SMWHT - Somewhat
SN - Snow
SNBNK - Snow bank
SND - Sand
SNFLK - Snow flake
SNGL - Single
SNOINCR - Snow increase
SNOINCRG - Snow increasing
SNOTEL -   SNOw TELemetry
SNR -   Signal-to-Noise Ratio
SNST - Sunset
SNW - Snow
SNWFL - Snowfall
SO -   Southern Oscillation
SOO - Scientific & Operations Officer
SOLAS -   Safety of Life at Sea Convention
SOP - Standard operating procedure
SP - Snow pellets
SPA - Subtropical Cyclone Public Advisory
SPC -   Storm Prediction Center
SPCLY - Especially
SPD - Speed
SPDS - Speeds
SPECI - Aviation selected special weather report (in aeronautical meteorological code)
SPECIAL - Special meteorological report (in abbreviated plain language)
SPENES - Satellite precipitation estimate statement
SPF - Probability of Tropical Cyclone Conditions
SPKL - Sprinkle
SPKLS - Sprinkles
SPLNS - Southern Plains
SPOT - Spot wind
SPRD - Spread
SPRDG - Spreading
SPRDS - Spreads
SPRL - Spiral
SPS -   Severe Weather Potential Statement or Special Weather Statement
SQ -   Squall
SQAL - Squall
SQLN - Squall line
SQSN -   Snow Squalls
SR - Sunrise
SRH -   Storm-relative Helicity.
SRM -   Storm Relative Mean Radial Velocity Map
SRN - Southern
SRND - Surround
SRNDD - Surrounded
SRNDG - Surrounding
SRNDS - Surrounds
SRR -   Storm Relative Mean Radial Velocity Region
SRY - Secondary
SS - Sandstorm or sunset
SSE - South-southeast
SSELY - South-southeasterly
SSERN - South-southeastern
SSEWD - South-southeastward
SSHP -   Site Specific Hydrologic Prediction System
SST -   sea surface temperature
SSW - South southwest
SSWLY - South-southwesterly
SSWRN - South-southwestern
SSWWD - South-southwestward
St or ST -   Stratus
STAGN - Stagnation
STBL - Stable
STBLTY - Stability
STD - Standard
STDY - Steady
STF - Stratiform
STFR - Stratus fractus
STFRM - Stratiform
STG - Strong
STGLY - Strongly
STGR - Stronger
STGST - Strongest
STI -   Storm Tracking Information
STLT - Satellite
STM - Storm
STMS - Storms
STN - Station
STN - Station
STNR - Stationary
STNRY - Stationary
STNS - Stations
STP -   Storm Total Precipitation
SUB - Substitute
SUBTRPCL - Subtropical
SUF - Sufficient
SUFLY - Sufficiently
SUG - Suggest
SUGG - Suggesting
SUGS - Suggests
SUN - Sunday
SUP - Supply
SUPG - Supplying
SUPR - Superior
SUPS - Supplies
SUPSD - Supersede
SUPSDG - Superseding
SUPSDS - Supersedes
SVG - Serving
SVR -   Severe Thunderstorm Warning or Severe
SVRL - Several
SW - Southwest or Spectrum Width
SWA -   Severe Weather Analysis (SWA)
SWB - South-westbound
SWD - Southward
SWE -   Snow Water Equivalent
SWEAT Index -   Severe WEAther Threat Index
SWI -   Showalter Index
SWLG - Swelling
SWLY - Southwesterly
SWO -   SPC Mesoscale Discussions or Convective Outlook
SWODY1 -   Day-1 Convective Outlook
SWODY2 -   Day 2 Convective Outlook
SWOMCD - SELS Mesoscale Discussion
SWP -   Severe Weather Probability
SWR -   State Weather Roundup
SWRN - Southwestern
SWS -   Severe Weather Statement
SWWD - Southwestward
SX - Stability index
SXN - Section
SXNS - Sections
SYNOP - Synoptic
SYNS - Synopsis
SYS - System

National Weather Service Weather Forecast Office