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Hefty Tank Weather Forecast
| TODAY | TONIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT |
 |  | | |  |  | | | | | | |
| Partly Sunny | Partly Cloudy | Clouds | Partly Cloudy | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm |
| Hi: 88°FHi: 31°C | Lo: 67°FLo: 19°C | Hi: 90°FHi: 32°C | Lo: 67°FLo: 19°C | Hi: 86°FHi: 30°C | Lo: 62°FLo: 17°C | Hi: 81°FHi: 27°C | Lo: 60°FLo: 16°C | Hi: 81°FHi: 27°C | Lo: 61°FLo: 16°C | Hi: 82°FHi: 28°C | Lo: 61°FLo: 16°C |
| POP: 30% | POP: 30% | POP: 50% | POP: 30% | POP: 40% | POP: 40% | POP: 20% | POP: 10% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1131 AM MST Sun Sep 20 2026 
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Instant definitions for any meteorological term.
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Issued: 1029 AM MST Sun Sep 20 2026
Key Messages
- Dry, tranquil weather conditions with near to slightly above normal temperatures will continue through the first half of next week.
- A low pressure system with returning moisture will yield renewed rainfall chances to at least the high terrain of northern and eastern Arizona during the latter half of next week.
Aviation
...Updated at 1730Z.
South Central Arizona including KPHX, KIWA, KSDL, and KDVT: No major aviation concerns are expected during the TAF period under increasing mid and hi...