The Early Warning Sirens will be activated when the National Weather Service (NWS) issues a warning for an area that includes any part of the city limits of Marshall. Sirens are usually only activated for tornado warnings. For clarification, listed below are the NWS definition of warnings, watches, and advisories.
Watch Versus Warning Versus Advisory
The following are the National Weather Service definitions for watch, warning, and advisory.
- Advisory: Issued for less serious conditions that cause significant inconvenience and, if caution is not exercised, could lead to situations that may threaten life and/or property.
- Warning: Issued when hazardous weather or hydrologic event is occurring, is imminent, or has a very high probability of occurrence. A warning is used for conditions posing a threat to life or property. The NWS is the single "official" voice when issuing warnings for life-threatening situations.
- Watch: Issued when the risk of hazardous weather or hydrologic event has increased significantly, but its occurrence, location, and/or timing is still uncertain. It is intended to provide enough lead time so those who need to set their plans in motion can do so. Watches evolve into warnings, advisories, or they are canceled.
More information can be found on Weather.Gov.