DENVER (CBS4)– Get ready for a cell phone alert on Wednesday afternoon that will be a first from President Donald Trump.

The system is testing an alert from the National Presidential Alert System that could be used to warn the country about a crisis, not for regional or local alerts.

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The test is scheduled for 12:18 p.m. Wednesday in the Mountain Time Zone. The test will sound an alarm similar to other alerts like the AMBER Alert system.

(credit: CBS)

“When those messages appear on mobile devices, people should take those extremely seriously,” FEMA’s Antwane Johnson told CBS News. “It has some direct impact on either life or safety.”

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Johnson said the system will be used to notify U.S. citizens of certain events of “national significance.”

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The new presidential alert will be used for advance warning of national crises, and not for regional or local alerts.