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Rock Lake Weather Forecast
| TODAY | TONIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT |
 |  |  |  | |  |  | | |  | |  |
| Chance of T-Storm | Chance of T-Storm | Partly Cloudy | Patchy Fog | Patchy Fog | Clear | Mostly Sunny | Clear | Partly Cloudy | Partly Cloudy | Partly Cloudy | Chance of Showers |
| Hi: 81°FHi: 27°C | Lo: 61°FLo: 16°C | Hi: 80°FHi: 27°C | Lo: 61°FLo: 16°C | Hi: 81°FHi: 27°C | Lo: 61°FLo: 16°C | Hi: 85°FHi: 29°C | Lo: 65°FLo: 18°C | Hi: 85°FHi: 29°C | Lo: 69°FLo: 21°C | Hi: 89°FHi: 32°C | Lo: 69°FLo: 21°C |
| POP: 20% | POP: 30% | POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 733 AM EDT Thu Aug 27 2026 
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Issued: 736 AM EDT Thu Aug 27 2026
Key Messages
1) Isolated to scattered showers and thunderstorms today. There is a Marginal Risk for severe storms this afternoon and early evening mainly east of Pittsburgh
2) Dry weather returns Friday through the weekend, before additional shower and thunderstorm chances return early next week.
Discussion
... KEY MESSAGE 1... A lead shortwave in a broad upper trough will cross the eastern Great Lakes and Upper Ohio Valley region this morning. Isolated showers, and possibly a thunderstorm, are expe...