Grand Canyon National Park, Arizona
Regional Weather Alerts
| Alert: | Freeze Warning |
| Area(s): | Upper Santa Cruz River and Altar Valleys including Nogales; Upper San Pedro River Valley including Sierra Vista/Benson; Eastern Cochise County Below 5000 Feet including Douglas/Willcox; Upper Gila River and Aravaipa Valleys including Clifton/Safford |
| Effective: | 2025-11-20 @ 3:45 am -> 2025-11-21 @ 10:00 am |
| Onset: | 2025-11-21 @ 3:00 am -> 2025-11-20 @ 6:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Tucson AZ on 2025-11-20 @ 3:45 am |
| Headline: | Freeze Warning issued November 20 at 2:45AM MST until November 21 at 9:00AM MST by NWS Tucson AZ |
| Description: |
* WHAT...Sub-freezing temperatures between 24 to 32 degrees expected. * WHERE...Eastern Cochise County below 5000 feet, Sulphur Springs Valley, Upper San Pedro River Valley, and Upper Santa Cruz River Valley/Altar Valley. * WHEN...From 2 AM to 9 AM MST Friday. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. |