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Gurnee Lake Weather Forecast
| TODAY | TONIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT |
 |  |  |  | | | | | | | | |
| Sunny | Partly Cloudy | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Partly Cloudy | Mostly Sunny | Partly Cloudy | Sunny | Partly Cloudy | Mostly Sunny | Partly Cloudy |
| Hi: 81°FHi: 27°C | Lo: 65°FLo: 18°C | Hi: 81°FHi: 27°C | Lo: 65°FLo: 18°C | 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: 69°FLo: 21°C | Hi: 85°FHi: 29°C | Lo: 69°FLo: 21°C |
| POP: 90% | POP: 70% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 250 AM EDT Wed Aug 26 2026 
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Issued: 1042 AM EDT Wed Aug 26 2026
Key Messages
1) Confidence is increasing in a period of heavy rainfall and scattered thunderstorms Thursday into Thursday night, mainly for NYC and areas north and west. Isolated instances of flash flooding and strong to severe thunderstorms are also possible, particularly west of the Hudson River.
2) Dry and seasonable for the weekend ahead, with a warming trend early next week.
Discussion
... .KEY MESSAGE 1... There has not been much change to the forecast thinking with this update, as the ingredi...