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Keystone Lake Weather Forecast
| TODAY | TONIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT |
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| Chance of T-Storm | Chance of T-Storm | Partly Cloudy | Clear | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of Showers | Chance of Showers | Chance of Showers | Chance of Showers |
| Hi: 80°FHi: 27°C | Lo: 61°FLo: 16°C | Hi: 80°FHi: 27°C | Lo: 60°FLo: 16°C | Hi: 80°FHi: 27°C | Lo: 61°FLo: 16°C | Hi: 79°FHi: 26°C | Lo: 59°FLo: 15°C | Hi: 79°FHi: 26°C | Lo: 60°FLo: 16°C | Hi: 79°FHi: 26°C | Lo: 60°FLo: 16°C |
| POP: 70% | POP: 50% | POP: 50% | POP: 50% | POP: 50% | POP: 50% | POP: 40% | POP: 40% | POP: 50% | POP: 50% |
POP = Probability of Precipitation.
Weather Outlook Updated: 502 AM EDT Mon Aug 17 2026 
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Keystone Lake Forecast Discussion
Issued: 227 AM EDT Mon Aug 17 2026
Key Messages
1) After lingering showers dissipate Monday, there is fairly high confidence in dry weather until Wednesday/Thursday, when the next front arrives.
2) Cold front arriving on Wednesday and potentially stalling over the southern portion of the area by Thursday.
Discussion
... KEY MESSAGE 1... Expect another weak wave to track through the region during the day on Monday. Convective parameters are unfavorable for severe weather with this activity for most of the...