TypeFewer LettersMore Letters
Acronym AEMI (GFS) Ensemble Mean forecast, Interpolated for the next 6 hours
Acronym AEMN (GFS) Ensemble Mean forecast (based on NOAA data)
Acronym AEW African Easterly Wave, aka a [tropical wave](https://en.wikipedia.org/wiki/Tropical_wave)
Acronym AFD Area Forecast Discussion. The scientific comments regarding the forecast from a Weather Forecast Office.
Acronym AGL Above Ground Level
Acronym AIRMET Airman's Meteorological information
Acronym ARRC Advanced Radar Research Center
Acronym ATD Advanced Technology Demonstrator - A new phased array radar unit to be commissioned in 2018
Acronym ATK Alliant Techsystems, predecessor to Orbital ATK
Acronym ATL Atlantic ocean
Acronym AVN Aviation
Acronym B-57 Martin WB-57F Canberra, a highly modified bomber aircraft reconfigured for high-altitude weather reconnaissance, operated by NASA
Acronym BAMD Beta and Advection Model, Deep layer (generated by NHC)
Acronym BAMM Beta and Advection Model, Medium layer (generated by NHC)
Acronym BAMS Beta and Advection Model, Shallow layer (generated by NHC)
Acronym BOC Bay of Campeche (southern Gulf of Mexico)
Acronym BVI British Virgin Islands
Acronym C-130 Lockheed WC-130J, weather reconnaissance aircraft operated by the US Air Force
Acronym CBS Columbia Broadcasting System, a popular TV network
Concrete Block and Stucco construction
Acronym CCKW Convectively Coupled Kelvin Wave, a thousand mile-long, eastward-moving stratospheric impulse along the equator which can enhance convection and cyclogenesis
Acronym CIMSS Cooperative Institute for Meteorological Satellite Studies, Madison, WI
Acronym CIRA Cooperative Institute for Research in the Atmosphere
Acronym CLCDr Central Launch Command Director
Acronym CMC Canadian Meteorological Center
Acronym CONUS Continental/Contiguous United States (of America)
Acronym CPAC Central Pacific ocean
Acronym CPAR Cylindrical Phased Array Radar
Acronym CPHC Central Pacific Hurricane Center (RSMC for the Central Pacific)
Acronym CPPAR Cylindrical Polarimetric Phased Array Radar
Acronym CWA County Warning Area. The geographical region served by a given Weather Forecast Office.
Acronym DP Dual-Polarity radar (as operated by NEXRAD)
Acronym DR Dominican Republic
Acronym DT Dry Tortugas (westernmost of the Florida Keys)
Acronym EA Environmental Assessment
Acronym EC European Centre
Acronym ECM European Center for Medium-range Weather Forecasts ("the Europeans")
Acronym ECMWF European Centre for Medium-range Weather Forecasts (*Euro model*)
Acronym EIS Environmental Impact Statement
Acronym EPAC East Pacific ocean
Acronym EWRC Eyewall Replacement Cycle weather pattern
Acronym FOUS Forecast Output United States
Acronym FV3 [Finite­ Volume Cubed-Sphere dynamical core](https://www.weather.gov/news/fv3) model. The new hotness from GFDL and NOAA, slated to replace the technology currently used to power the GFS model. As of 2018, FV3 is in testing.
Acronym G-IV Gulfstream IV, medium-to-high altitude weather reconnaissance aircraft operated by NOAA
Acronym GEFS Global Ensemble Forecast System
Acronym GEM Global Environmental Multiscale forecast
Acronym GEPS Global Ensemble Prediction System, produced by the CMC
Acronym GFDL Geophysical Fluid Dynamics Lab
Acronym GFS [Global Forecast System](https://en.wikipedia.org/wiki/Global_Forecast_System) model (generated by NOAA)
Acronym GLM [Geostationary Lightning Mapper](https://en.wikipedia.org/wiki/GOES-16#Geostationary_Lightning_Mapper). A lightning-sensing instrument aboard GOES-16.
Acronym GMT Greenwich Mean Time / Coordinated Universal Time
Acronym GOES [Geostationary Operational Environmental Satellite](https://en.wikipedia.org/wiki/GOES)
Acronym GOES-16 [Geostationary Operational Environmental Satellite, # 16](https://en.wikipedia.org/wiki/GOES-16). A geostationary weather satellite with cutting edge technology. Formerly known as GOES-R before launch.
Acronym GOES-17 [Geostationary Operational Environmental Satellite, # 17](https://en.wikipedia.org/wiki/GOES-17). A geostationary weather satellite with cutting edge technology. Formerly known as GOES-S before launch.
Acronym GOES-R [Geostationary Operational Environment Satellite, R series](https://en.wikipedia.org/wiki/GOES-R), launched in Nov 2016. Renamed GOES-16 once it reached orbit. It is now operational in the GOES-East position as of November 2017. Also refers to it's generation of satellites as a whole, which includes (or will include) GOES-S/-17, GOES-T/18, and GOES-U/19.
Acronym GOH Gulf of Honduras (western Caribbean, separated from Bay of Campeche by the Yucatan peninsula)
Acronym GOM Gulf of Mexico ocean region
Acronym GPM Global Precipitation Model
Global Precipitation Measurement satellite
Acronym HGX The Weather Forecast Office in Houston, TX, whose County Warning Area includes southeastern Texas.
The NEXRAD radar located at the Houston WFO.
Acronym HOU Houston, Texas
Acronym HRRR High Resolution Rapid Refresh. A numerical weather model with a 3-kilometer resolution.
Acronym HWRF Hurricane Weather Research and Forecasting model (from NCEP)
Acronym IFR [Instrument Flight Rules](https://en.wikipedia.org/wiki/Instrument_flight_rules)
Acronym IR Infrared satellite imagery
Acronym ITCZ Inter-Tropical Convergence Zone
Acronym JMA Japan Meterological Agency (RSMC for the Western Pacific)
Acronym JTWC Joint Typhoon Warning Center (issues tropical cyclone warnings in the Northwest and Southern Pacific, and Indian Ocean)
Acronym LIX The Weather Forecast Office in Slidell, LA, whose County Warning Area includes New Orleans, LA.
The NEXRAD radar located at the Slidell, LA WFO.
Acronym LL Lower Level winds/conditions
Acronym MDR Main Development Region
Acronym METAR Meterological Aerodrome Report
Acronym MFL The Weather Forecast Office in Miami, FL, whose County Warning Area includes southern Florida.
The NEXRAD radar located at the Miami WFO.
Acronym MIA Miami, Florida
Acronym MIATWO Tropical Weather Outlook (from NWS Miami)
Acronym MIATWOAT Tropical Weather Outlook, Atlantic (from NWS Miami)
Acronym MIATWOEP Tropical Weather Outlook, East Pacific (from NWS Miami)
Acronym MIMIC Morphed Integrated Microwave Imagery at CIMSS
Acronym MPAR Multi-function Phased Array Radar
Acronym MSFC Marshall Space Flight Center. A NASA research facility.
Acronym MVFR Marginal Visual Flight Rules
Acronym NAM North American Mesoscale forecast (generated by NCEP)
Acronym NAVGEM Navy Global Environmental Model (generated by NOAA)
Acronym NCEP National Centers for Environmental Prediction
Acronym NDBC (US) National Data Buoy Center
Acronym NESDIS National Environmental Satellite, Data, and Information Service (NOAA department)
Acronym NEXRAD [NEXt generation RADar](https://en.wikipedia.org/wiki/NEXRAD), operated by NWS
Acronym NHC National Hurricane Center
Acronym NOAA National Oceanic and Atmospheric Administration, responsible for US ~~generation~~ monitoring of the climate
Acronym NOGAPS Naval Operational Global Atmospheric Prediction System, superceded by NAVGEM
Acronym NOLA New Orleans, Louisiana
Acronym NOTAM [Notice to Airmen](https://en.wikipedia.org/wiki/NOTAM) of flight hazards
Acronym NOVA Northern Virginia
Acronym NPP National Polar-orbiting Partnership satellite
Acronym NSSL National Severe Storms Laboratory
Acronym NWRT National Weather Radar Testbed - A phased array radar test unit, retired in 2016
Acronym NWS National Weather Service
Acronym OBX Outer Banks (of North Carolina)
Acronym OECD Organisation for Economic Cooperation and Development
Acronym OFCI Official NHC forecast (as seen on spaghetti plots) interpolated for the next 6 hours
Acronym OFCL Official NHC forecast (as seen on spaghetti plots)
Acronym OTS Out To Sea
Acronym P-3 Lockheed WP-3D Orion, weather reconnaissance aircraft operated by NOAA
Acronym PAR Phased Array Radar
Acronym POES [Polar Operational Environment Satellite](http://en.wikipedia.org/wiki/POES)
Acronym PoP Probability of Precipitation
Acronym PR Puerto Rico
Acronym PWAT Precipitable Water. The measure of the depth of liquid water at the surface that would result after precipitating all of the water vapor in a vertical column over a given location.
Acronym RAMMB Regional and Mesoscale Meteorology Branch
Acronym RAMSDIS RAMMB Advanced Meteorological Satellite Demonstration and Interpretation System
Acronym RAP Rapid Refresh model. A numerical weather model similar to the HRRR but with lower resolution.
Acronym RI Rapid Intensification
Acronym RQ-4 Northrop-Grumman RQ-4 Global Hawk, a large, high-altitude unmanned weather reconnaissance aircraft operated by NASA
Acronym RSMC Regional Specialized Meteorological Center (NHC is the RSMC for Atlantic and East Pacific)
Acronym SCADA [Supervisory Control And Data Acquisition](https://en.wikipedia.org/wiki/SCADA) remote monitoring and control
Acronym SCAT Scatterometer mounted on POES, measures ocean wind speeds
Acronym SFMR Stepped-Frequency Microwave Radiometer measurements
Acronym sh/ts Showers/Thunderstorms. Often seen in Area Forecast Discussions.
Acronym SHIPS Statistical Hurricane Intensity Prediction Scheme
Acronym SLOSH Sea Lake and Overland Surges from Hurricanes storm model
Acronym SOP Standard Operating Procedure
Acronym SPC (US) Storm Prediction Center
Acronym SPoRT [Short-term Prediction Research and Transition Center](https://weather.msfc.nasa.gov/sport/). A NASA satellite observation research group.
Acronym SRSO Super-Rapid Scan Operations (1-minute satellite imagery)
Acronym SRSOR Super-Rapid Scan Operations (1-minute satellite imagery) from GOES
Acronym SS Storm Surge
Acronym SST Sea Surface Temperature
Acronym T&C Turks and Caicos Islands, southeast of the Bahamas
Acronym TAF Terminal Aerodrome Forecast
Acronym TBW The Weather Forecast Office in Tampa Bay, FL, whose County Warning Area includes western peninsular Florida.
The NEXRAD radar located at the Tampa Bay WFO.
Acronym TD Tropical Depression
Acronym TMFM [Too Many ~~Fu-~~ Finely-detailed Models](http://derecho.math.uwm.edu/models/models.html)
Acronym TPW Total Precipitable Water
Acronym TS Tropical Storm
Acronym TW Tropical Wave, a type of atmospheric trough—an elongated area of relatively low air pressure—oriented north to south, which moves from east to west across the tropics, causing areas of cloudiness and thunderstorms. They can be the seed from which tropical cyclones grow.
Acronym TWOAT Tropical Weather Outlook, Atlantic
Acronym TWOEP Tropical Weather Outlook, East Pacific
Acronym U-2 [Lockheed U-2](https://en.wikipedia.org/wiki/Lockheed_U-2), a very high-altitude research and reconnaissance aircraft operated by NASA, which is occasionally used to investigate hurricanes. Several versions exist, including the ER-2 and TR-1.
Acronym UKMET United Kingdom Meteorological Office unified model
Acronym UL Upper Level winds/conditions
Acronym ULL Upper-Level Low-pressure region
Acronym USAF United States Air Force
Acronym USVI United States Virgin Islands
Acronym UTC [Coördinated Universal Time](https://en.wikipedia.org/wiki/Coordinated_Universal_Time), the standard time used by meteorologists and forecasts worldwide.
Acronym VFR [Visual Flight Rules](https://en.wikipedia.org/wiki/Visual_flight_rules)
Acronym VIIRS Visible/Infrared Imaging Radiometer Suite, instrument on the NPP satellite
Acronym VIS Visible-light satellite imagery
Acronym VORT [Vorticity](https://en.wikipedia.org/wiki/Vorticity), angular velocity around a point
Acronym VTOL Vertical Take-Off and Landing
Acronym WB-57 Martin WB-57F Canberra, a highly modified bomber aircraft reconfigured for high-altitude weather reconnaissance, operated by NASA
Acronym WC-130 Lockheed WC-130J, weather reconnaissance aircraft operated by the US Air Force
Acronym WFO Weather Forecast Office. The National Weather Service facility serving a given area. [List of WFOs](https://en.wikipedia.org/wiki/List_of_National_Weather_Service_Weather_Forecast_Offices)
Acronym WMO World Meteorological Organisation
Acronym WP-3 Lockheed WP-3D Orion, a weather reconnaissance aircraft operated by NOAA. NOAA has two of these aircraft, named *Miss Piggy* and *Kermit*.
Acronym WPAC West Pacific ocean
Acronym WPC (US) Weather Prediction Center
Acronym WV Water Vapor
Acronym WX Weather
Acronym Z NATO timezone designator: UTC
Jargon GOES-East The [GOES satellite](https://en.wikipedia.org/wiki/Geostationary_Operational_Environmental_Satellite) positioned to watch the eastern half of the United States. Currently occupied by GOES-16.
Jargon GOES-West The [GOES satellite](https://en.wikipedia.org/wiki/Geostationary_Operational_Environmental_Satellite) positioned to watch the western half of the United States. Occupied by GOES-15 as of May 2018. Scheduled to be replaced by GOES-17 sometime in late 2018.
Jargon Meso [Mesoscale](https://en.wikipedia.org/wiki/Mesoscale_meteorology). Medium-sized, larger than micro- or storm-scale, but smaller than synoptic scale.
Mesoscale Sector. On of two 1000km x 1000km box in which GOES-16 can acquire imagery every minute.
Jargon milspec Military Specification
Jargon wobble Trochoidal motion due to uneven circulation, moving a storm slightly off-track