| 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 |
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 |
| SWPC |
Space Weather Prediction Center |
| 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 |
