The differences between weather warnings and watches

When the weather takes a turn for the worse, the National Weather Service may issue certain notices to prepare the public. Understanding the level of threat a notice carries can help people take appropriate action and avoid serious consequences.

The NWS uses a four-tier system to alert the public of hazards. Here’s a closer look at what each tier constitutes.

OUTLOOK: This is the least-serious weather alert. It usually means that hazardous weather may approach in the next three to seven days. The public should monitor the situation and stay tuned for further updates.

ADVISORY: With an advisory, weather conditions are not overly serious but could prove inconvenient. Individuals should be cautious and prudent when preparing supplies or traveling.

WATCH: During a weather watch, there is an increased risk of a hazardous weather occurrence, though the timing or location is still uncertain. This is when it is essential to practice an evacuation or preparedness plan and stock up on any last-minute supplies.

WARNING: The most serious of the weather-impact notifications, a warning constitutes an imminent or likely event. The weather may cause a threat to property or life. Immediate action to stay safe is necessary.

While these alerts are based on the severity of impending weather, it is important to note that the NWS will not necessarily follow the same timeline with issuing alerts. That depends on how fast a weather situation develops. If there is time, an advisory, then a watch, then a warning may be issued. However, if a storm moves in rapidly, only a warning may be issued.