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Non-Weather Emergency Messages (NWEM)

What is NWEM?

NWEM is a tool for federal, state and local public safety leaders to issue localized EAS messages for non-weather related incidents.

  • Non-Weather Emergency Messages
  • Provides the ability to send & focus alerts to specific geographical areas.
  • NWEM utilizes Wisconsin’s NOAA Weather Radio Network (33) which is picked up by local TV and Radio Broadcasters to disseminate the alert

The NWS handles all weather related warnings

NWEM Message Broadcast

  • Once the emergency personnel’s NWEM is broadcast on the NWR, it is relayed to all TV and radio stations, on the EAS “web,” which are monitoring specific NWR’s for emergency messages.
  • TV & radio stations have an electronic box that stores the messages with certain EAS codes – for crawler generation, relay, etc.

NWEM Messages

  • Administrative Message (ADR). A non-emergency message that provides updated information about an event in progress, an event that has expired or concluded early, pre-event preparation or mitigation activities, post-event recovery operations, or other administrative matters pertaining to the Emergency Alert System. The ADR is to be used for all follow-up messages pertaining to an original warning.
  • Civil Danger Warning (CDW). A warning of an event that presents a danger to a significant civilian population. The CDW, which usually warns of a specific hazard and gives specific protective action, has a higher priority than the Local Area Emergency (LAE). Examples include contaminated water supply and imminent or in-progress military or terrorist attack. Public protective actions could include evacuation, shelter in place, or other actions (such as boiling contaminated water or seeking medical treatment).
  • Civil Emergency Message (CEM). An emergency message regarding an in-progress or imminent significant threat(s) to public safety and/or property. The CEM is a higher priority message than the Local Area Emergency (LAE), but the hazard is less specific then the Civil Danger Warning (CDW). For example, the CEM could be used to describe a change in the Homeland Security Alert System level in response to a terrorist threat.
  • Earthquake Warning (EQW). A warning of current or imminent earthquake activity. Authorized officials may recommend or order protective actions according to state law or local ordinance.
  • Evacuation Immediate (EVI). A warning where immediate evacuation is recommended or ordered according to state law or local ordinance. As an example, authorized officials may recommend the evacuation of affected areas due to an approaching tropical cyclone. In the event a flammable or explosive gas is released, authorized officials may recommend evacuation of designated areas where casualties or property damage from a vapor cloud explosion or fire may occur.
  • Fire Warning (FRW). A warning of a spreading wildfire or structural fire that threatens a populated area. Evacuation of areas in the fire’s path may be recommended by authorized officials according to state law or local ordinance.
  • Hazardous Materials Warning (HMW). A warning of the release of a non-radioactive hazardous material (such as a flammable gas, toxic chemical, or biological agent) that may recommend evacuation (for an explosion, fire or oil spill hazard) or shelter in place (for a toxic fume hazard).
  • Law Enforcement Warning (LEW). A warning of a bomb explosion, riot, or other criminal event (e.g. a jailbreak). An authorized law enforcement agency may blockade roads, waterways, or facilities, evacuate or deny access to affected areas, and arrest violators or suspicious persons.
  • Local Area Emergency (LAE). An emergency message that defines an event that by itself does not pose a significant threat to public safety and/or property. However, the event could escalate, contribute to other more serious events, or disrupt critical public safety services. Instructions, other than public protective actions, may be provided by authorized officials. Examples include: a disruption in water, electric or natural gas service, road closures due to excessive snowfall, or a potential terrorist threat where the public is asked to remain alert.
  • 911 Telephone Outage Emergency (TOE). An emergency message that defines a local or state 911 telephone network outage by geographic area or telephone exchange. Authorized officials may provide alternative phone numbers in which to reach 911 or dispatch personnel.
  • Nuclear Power Plant Warning (NUW). A warning of an event at a nuclear power plant classified such as a Site Area Emergency or General Emergency as classified by the Nuclear Regulatory Commission (NRC). A Site Area Emergency is confined to the plant site; no off-site impact is expected. Typically, a General Emergency is confined to an area less than a 10-mile radius around the plant. Authorized officials may recommend evacuation or medical treatment of exposed persons in nearby areas.
  • Radiological Hazard Warning (RHW). A warning of the loss, discovery, or release of a radiological hazard. Examples include: the theft of a radioactive isotope used for medical, seismic, or other purposes; the discovery of radioactive materials; a transportation (aircraft, truck or rail, etc.) accident which may involve nuclear weapons, nuclear fuel, or radioactive wastes. Authorized officials may recommend protective actions to be taken if a radioactive hazard is discovered.
  • Shelter in Place Warning (SPW). A warning of an event where the public is recommended to shelter in place (go inside, close doors and windows, turn off air conditioning or heating systems, and turn on the radio or TV for more information). An example is the release of hazardous materials where toxic fumes or radioactivity may affect designated areas.

How does NWEM work

Two Paths

  1. NOAA Weather Radio
  2. EAS Broadcast

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How does NWEM work