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Lake Martha Weather Forecast
| REST OF TONIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | SATURDAY | SATURDAY NIGHT |
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| Partly Cloudy | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Partly Cloudy | Chance of Showers | Clearing | Mostly Sunny | Chance of Showers | Mostly Clear | Mostly Clear | Partly Cloudy |
| Lo: 60°FLo: 16°C | Hi: 80°FHi: 27°C | Lo: 59°FLo: 15°C | Hi: 79°FHi: 26°C | Lo: 55°FLo: 13°C | Hi: 79°FHi: 26°C | Lo: 59°FLo: 15°C | Hi: 81°FHi: 27°C | Lo: 61°FLo: 16°C | Hi: 80°FHi: 27°C Lo: 59°FLo: 15°C | Hi: 80°FHi: 27°C Lo: 59°FLo: 15°C | Hi: 79°FHi: 26°C Lo: 59°FLo: 15°C |
| POP: 50% | POP: 20% | POP: 50% | POP: 20% | POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1237 AM CDT Mon Aug 17 2026 
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Lake Martha Forecast Discussion
Issued: 1229 AM CDT Mon Aug 17 2026
Key Messages
- There is a Marginal Risk, level 1 out of 5, for severe storms for portions of central South Dakota this evening and tonight and a Marginal Risk again late Monday afternoon through Monday night along and east of a line from Wheaton, MN to Hayes, SD. Main threats include 1 inch diameter hail and wind gusts of 60 mph. Brief heavy rainfall is also possible.
Discussion
... Issued at 1234 PM CDT Sun Aug 16 2026
Sfc high pressure slides to the southeast tonight. T...