Severe Future Possible Freeze Watch Freeze Watch issued May 17 at 10:59PM MDT until May 19 at 8:00AM MDT by NWS Denver CO May 19, 12:00 AM → May 19, 8:00 AM WHAT: Sub-freezing temperatures as low as 30 possible. WHERE: The I-25 Urban Corridor and all of the plains of northeastColorado. WHEN: From late Monday night through early Tuesday morning. IMPACTS: Frost and freeze conditions could kill crops and othersensitive vegetation. + Read More Take steps now to protect tender plants from the cold. Updated: May 18, 5:51 AM Source: NWS Alert