Civil danger warning

A civil danger warning (SAME code: CDW) is a warning issued by authorized public officials in the United States and is relayed by the National Weather Service for an event that presents a danger to a significant civilian population. The warning, 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, major accidents, and imminent or in-progress military or terrorist attack. Public protective actions could include evacuation, shelter in place, or other actions. Related warnings such as an immediate evacuation (EVI) or shelter-in-place warning (SPW) may follow.

Examples

 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
CIVIL DANGER WARNING
WISCONSIN EMERGENCY MANAGEMENT AGENCY MILWAUKEE/SULLIVAN
RELAYED BY NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
1233 AM CST WED FEB 2 2011

THE FOLLOWING MESSAGE IS TRANSMITTED AT THE REQUEST OF THE WISCONSIN
EMERGENCY MANAGEMENT AGENCY MILWAUKEE/SULLIVAN WISCONSIN. DRIVING IS
EXTREMELY HAZARDOUS TONIGHT ON ALL ROADS IN SOUTHERN WISCONSIN. IF YOU
BECOME STRANDED...EMERGENCY VEHICLES MAY NOT BE ABLE TO REACH YOU.
IF YOU ARE STRANDED...DO NOT LEAVE YOUR VEHICLE. RUN YOUR VEHICLE 10
MINUTES PER HOUR...AND CRACK A DOWN WIND WINDOW FOR VENTILATION.

$$

[1]

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WOUS44 KLZK 272046
CDWLZK
ARC083-280000-

URGENT - IMMEDIATE BROADCAST REQUESTED
CIVIL DANGER WARNING
ARKANSAS EMERGENCY MANAGEMENT AGENCY LITTLE ROCK ARKANSAS
RELAYED BY NATIONAL WEATHER SERVICE LITTLE ROCK AR
346 PM CDT MON MAY 27 2019

THE FOLLOWING MESSAGE IS TRANSMITTED AT THE REQUEST OF THE
LOGAN COUNTY EMERGENCY MANAGEMENT AGENCY AND THE LOGAN COUNTY 
JUDGE.

MCLEAN BOTTOMS IN LOGAN COUNTY IS CLOSED OFF TO ALL PUBLIC
ACCESS EFFECTIVE IMMEDIATELY. THIS INCLUDES PORTIONS OF NORTH
HIGHWAY 309, COTTONTOWN RD., AND KALAMAZOO ROAD. THIS IS BY 
ORDER OF THE LOGAN COUNTY JUDGE, NO PERSONS ARE ALLOWED IN
THIS AREA DUE TO FORECAST FLOODING. DRIVING INTO THIS AREA 
MAY PUT YOUR LIFE IN DANGER!

$$

CAVANAUGH

[2]

Hawaii false alarm
See also: 2018 Hawaii false missile alert

On January 13, 2018, a civil danger warning was issued for the entire State of Hawaii notifying the public of an "incoming ballistic missile attack" due to human error of an emergency management official and to seek immediate shelter. 38 minutes later, it was deemed a false alarm.

References
  1. "Civil Danger Warning". YouTube. February 1, 2011.
  2. "Civil Danger Warning on May 27, 2019". Iowa Environmental Mesonet. May 27, 2019.

 This article incorporates public domain material from the United States Government document: "Non-Weather Related Emergency Message Description Guidelines".


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