The National Weather Service, part of the National Oceanic and Atmospheric Administration (NOAA), issues alerts when weather conditions make hurricanes more likely. Know the terms used to describe changing hurricane conditions and be prepared to take appropriate action.
TROPICAL STORM OR HURRICANE ADVISORY
The NWS issues an Advisory when it expects conditions to cause significant inconveniences that may be hazardous. If caution is used, these situations should not be life-threatening
TROPICAL STORM OR HURRICANE WATCH
The NWS issues a Watch when a tropical storm or hurricane is possible within 48 hours. Tune in to NOAA Weather Radio All Hazards, local radio, TV, or other news sources for more information. Monitor alerts, check your emergency supplies, and gather any items you may need if you lose power.
TROPICAL STORM OR HURRICANE WARNING
The NWS issues a Warning when it expects a tropical storm or hurricane within 36 hours. During a Warning, complete your storm preparations, and immediately leave the threatened area if directed to do so by local officials.