| ARRL | American Radio Relay League |
| ARWO | Aerial Reconnaissance Weather |
| ASOS | Automated Surface Observing Systems |
| AST | Atlantic Standard Time (EST + 1 or same as EDT) |
| AVN | AViation ruN of the NCEP MRF model. |
| AWIPS | Advanced Weather Interactive Processing System |
| CARCAH | Chief, Aerial Reconnaissance Coordination, All Hurricanes |
| CDT | Central Daylight Time |
| CLIPER | CLImatology and PERsistence (statistical track forecast model) |
| CONUS | Continental United States |
| CP | Continental Polar (dry (continental) and cold (polar) airmass) |
| CPHC | Central Pacific Hurricane Center |
| CST | Central Standard Time |
| DAC | Disaster Application Center |
| DAE | Disaster Assistance Employee |
| DCO | Defense Coordinating Officer |
| DFO | Disaster Field Office |
| DOC | Department of Commerce |
| EAS | Emergency Alert System |
| EBS | Emergency Broadcast System |
| EDT | Eastern Daylight Time |
| EICC | Emergency Information and Coordination Center (FEMA) |
| EMS | Emergency Medical Services |
| EMWIN | Emergency Manager\'s Weather Information Center |
| EOC | Emergency Operations Center |
| EOP | Emergency Operations Plan |
| ERT | Emergency Response Team (FEMA) |
| ERT-A | Advance Element of the Emergency Response Team (FEMA) |
| ESF | Emergency Support Function |
| EST | Emergency Support Team (FEMA) / Eastern Standard Time |
| FAST | Field Assessment Team |
| FCO | Federal Coordinating Officer (FEMA) |
| FEMA | Federal Emergency Management Agency |
| FRP | Federal Response Plan |
| GFDL | Geophysical Fluid Dynamics Laboratory (a place and a computer model) |
| GFS | Global Forecasting System |
| GMT | Greenwich Mean Time |
| GOES | Geostationary Operational Environmental Satellite |
| GUNA | GFDI-UKMI-NGPI-AVNI model ensemble average |
| GUNS | GFDL-UKMET-NOGAPS model ensemble average |
| HES | Hurricane Evacuation Study |
| HF | High Frequency |
| HST | Hawaiia Standard Time |
| ICS | Incident Command System |
| IT | Information Technology Directorate (FEMA) |
| ITCZ | Inter-Tropical Convergence Zone |
| JIC | Joint Information Center |
| JTWC | Joint Typhoon Warning Center |
| KM | Kilometers |
| KT | Knots (nautical miles per hour 1 KT = 1.15 MPH) |
| LBAR | Limited area BARotropic (NCEP model) |
| LLCC | Low Level Cloud Center |
| M | Statute Mile |
| M/S | Meters Per Second |
| MB | Millibars |
| MEOW | Maximum Envelope of Water or Maximum Envelope of Winds |
| MERS | Mobile Emergency Response Support (FEMA) |
| MOC | MERS Operations Center (FEMA) |
| MPH | Miles Per Hour |
| MRF | Medium Range Forecast (NCEP) |
| MT | Mitigation Directorate (FEMA) |
| NASA | National Aeronautics and Space Administration |
| NAWAS | National Warning System |
| NDMS | National Disaster Medical System |
| NECC | National Emergency Coordination Center (FEMA) |
| NEXRAD | Next Generation of Radar |
| NHC | National Hurricane Center |
| NM | Nautical Mile |
| NOAA | National Oceanic and Atmospheric Administration |
| NOGAPS | Naval Operational Global Atmospheric Prediction System |
| NPSC | National Process Serving Center (FEMA) |
| NTC | National Teleregistration Center (FEMA) |
| NVOAD | National Voluntary Organizations Active in Disaster |
| NWS | National Weather Service |
| NWSFO | National Weather Service Forecasting Office |
| OS | Operations Support Directorate (FEMA) |
| OSC | On-Scene Coordinator |
| PIO | Public Information Officer |
| PT | Preparedness, Training and Exercises Directorate (FEMA) |
| PUP | Principle User Processor |
| RACES | Radio Amateur Civil Emergency Service |
| RADAR | Radio Detection And Ranging |
| RD | Regional Director |
| REACT | Radio Emergency Associated Communication Team |
| ROC | Regional Operations Center |
| RR | Response and Recovery Directorate (FEMA) |
| SCO | State Coordinating Officer |
| SHIFOR | Stastical Hurricane Intensity FORecast |
| SHIPS | Stastical Hurricane Intensity Prediction Scheme |
| SITREP | Situation Report |
| SLOSH | Sea, Lake, and Overland Surges for Hurricanes |
| SOP | Standard Operating Procedure |
| TAFB | Tropical Analysis and Forecast Branch (TPC) |
| TD | Tropical Depression |
| TPC | Tropical Prediction Center |
| TS | Tropical Storm |
| TSB | Technical Support Branch (TPC) |
| UKMET | United Kingdom Office of Meteorology (a place and a computer model) |
| USACE | United States Army Corps of Engineers |
| USAF | United States Air Force |
| USAR | Urban Search and Rescue |
| USCG | United States Coast Guard |
| USGS | United States Geological Survey |
| USN | United States Navy |
| UTC | Coordinated Universal Time |
| VT | Valid Time |
| WFO | Weather Forecast Office |
| WRF | Weather Research and Forecast Model |
| Z | Zulu Time (same as UTC) |
weather.gov 
