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National Terrorism Advisory System

In 2011, the Department of Homeland Security (DHS) replaced the color-coded alerts of the Homeland Security Advisory System (HSAS) with the National Terrorism Advisory System (NTAS), designed to more effectively communicate information about terrorist threats by providing timely, detailed information to the American public.

It recognizes that Americans all share responsibility for the nation's security, and should always be aware of the heightened risk of terrorist attack in the United States and what they should do.

This page also contains any current NTAS advisories and archived copies of expired advisories.

The NTAS Advisory – How can you help?

NTAS advisories – whether they be Alerts or Bulletins – encourage individuals to follow the guidance provided by state and local officials and to report suspicious activity. Where possible and applicable, NTAS advisories will include steps that individuals and communities can take to protect themselves from the threat as well as help detect or prevent an attack before it happens. Individuals should review the information contained in the Alert or Bulletin, and based upon the circumstances, take the recommended precautionary or preparedness measures for themselves and their families.

Individuals should report suspicious activity to local law enforcement authorities. Often, local law enforcement and public safety officials will be best positioned to provide specific details on what indicators to look for and how to report suspicious activity. The “If You See Something, Say Something TM” campaign across the United States encourages the public and leaders of communities to be vigilant for indicators of potential terroristic activity, and to follow the guidance provided by the advisory and/or state and local officials for information about threats in specific places or for identifying specific types of suspicious activity.

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Action Center

Last Published Date: October 27, 2016

Current Advisories

Bulletin

National Terrorism Advisory System Bulletin - November 9, 2017 (pdf, 1 page, 185.91 KB) View web version

Since 2015, the Department of Homeland Security (DHS) has used this Bulletin to highlight the continuing terror threat to the U.S. Homeland. The United States is engaged in a generational fight against terrorists who seek to attack the American people, our country, and our way of life. An informed, vigilant and engaged public remains one of our greatest assets to identify potential terrorists and prevent attacks.

Effective: 2017-11-09 00:00:00. Expires: 2018-05-09 00:00:00. *Alert Dates are Eastern Time*

Expired Advisories

Bulletin

National Terrorism Advisory System Bulletin - May 15, 2017 (pdf, 1 page, 608.02 KB) View web version

Since 2015, the Department of Homeland Security (DHS) has used this Bulletin to highlight the continuing threat from homegrown terrorists, many of whom are inspired online to violence by foreign terrorist organizations. The United States is engaged in a generational fight against terrorists, who seek to attack the American people, our country, and our way of life. An informed, vigilant, and engaged public remains one of our greatest assets to identify potential homegrown terrorists and prevent attacks.

Effective: 2017-05-15 00:00:00. Expires: 2017-11-09 00:00:00. *Alert Dates are Eastern Time*
National Terrorism Advisory System Bulletin - November 15, 2016 (pdf, 1 page, 173.58 KB) View web version

Since the last NTAS Bulletin issued in June 2016, our basic assessment of the global threat environment has not changed. We remain concerned about homegrown violent extremists who could strike the homeland with little or no notice. Events since the last NTAS Bulletin reinforce this. Accordingly, increased public vigilance and awareness continue to be of utmost importance. This was, for example, a crucial component of the swift response to the September terrorist acts in New York City and New Jersey.

Effective: 2016-11-15 00:00:00. Expires: 2017-05-15 00:00:00. *Alert Dates are Eastern Time*
National Terrorism Advisory System Bulletin - June 15, 2016 (pdf, 1 page, 876.65 KB) View web version

In December, we described a new phase in the global threat environment, which has implications on the homeland. This basic assessment has not changed. In this environment, we are particularly concerned about homegrown violent extremists who could strike with little or no notice. The tragic events of Orlando several days ago reinforce this. Accordingly, increased public vigilance and awareness continue to be of utmost importance. This bulletin has a five-month duration and will expire just before the holiday season. We will reassess the threats of terrorism at that time.

Effective: 2016-06-15 00:00:00. Expires: 2016-11-15 00:00:00. *Alert Dates are Eastern Time*
National Terrorism Advisory System Bulletin - December 16, 2015 (pdf, 1 page, 756.59 KB) View web version

We are in a new phase in the global threat environment, which has implications on the homeland.  Particularly with the rise in use by terrorist groups of  the Internet to inspire and recruit, we are concerned about the “self-radicalized” actor(s) who could strike with little or no notice. Recent attacks and attempted attacks internationally and in the homeland warrant increased security, as well as increased public vigilance and awareness.

Effective: 2015-12-16 00:00:00. Expires: 2016-06-15 00:00:00. *Alert Dates are Eastern Time*

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