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Number 18 Weather Forecast
| TODAY | TONIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SUNDAY | SUNDAY NIGHT | MONDAY | TUESDAY |
 |  | | | | |  | |  |  | |
| Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Mostly Clear | Mostly Clear | Partly Cloudy | Partly Cloudy | Clearing |
| Hi: 85°FHi: 29°C | Lo: 61°FLo: 16°C | Hi: 81°FHi: 27°C | Lo: 60°FLo: 16°C | Hi: 80°FHi: 27°C | Lo: 55°FLo: 13°C | Hi: 79°FHi: 26°C Lo: 51°FLo: 11°C | Hi: 79°FHi: 26°C Lo: 51°FLo: 11°C | Hi: 80°FHi: 27°C Lo: 55°FLo: 13°C | Hi: 80°FHi: 27°C Lo: 55°FLo: 13°C | Hi: 80°FHi: 27°C |
| POP: 50% | POP: 30% | POP: 50% | POP: 50% | POP: 70% | POP: 40% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1243 AM MDT Wed Sep 16 2026 
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Issued: 1044 PM MDT Tue Sep 15 2026
Key Messages
- Deep moisture will continue to bring an elevated threat of flooding to portions of southern and eastern Utah through at least Friday.
- A Flood Watch for flash flooding has been issued from late tonight through Thursday morning for portions of southern and eastern Utah including Zion National Park, Capitol Reef National Park, Glen Canyon Recreation Area, the greater Grand Staircase- Escalante National Monument area, and the lower Paria including Buckskin Gulch and Paria Canyon north of...