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Johnston Lake Weather Forecast
| TONIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY |
 |  |  |  | | | | | | |  | |
| Mostly Clear | Mostly Sunny | 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 | Mostly Sunny | Partly Cloudy | Mostly Sunny |
| Lo: 69°FLo: 21°C | Hi: 90°FHi: 32°C | Lo: 70°FLo: 21°C | Hi: 89°FHi: 32°C | Lo: 70°FLo: 21°C | Hi: 85°FHi: 29°C | Lo: 69°FLo: 21°C | Hi: 81°FHi: 27°C | Lo: 69°FLo: 21°C | Hi: 89°FHi: 32°C | Lo: 70°FLo: 21°C | Hi: 90°FHi: 32°C |
| POP: 50% | POP: 60% | POP: 60% | POP: 80% | POP: 80% | POP: 50% | POP: 50% |
POP = Probability of Precipitation.
Weather Outlook Updated: 742 PM EDT Tue Aug 25 2026 
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Instant definitions for any meteorological term.
Issued: 726 PM EDT Tue Aug 25 2026
Key Messages
1. Increased moisture will lead to greater shower and thunderstorm coverage through the end of the work week.
Discussion
... Key message 1: Increased moisture will lead to greater shower and thunderstorm coverage through the end of the work week.
An upper level trough axis is positioned just east of the area, resulting in a northwest flow aloft. Meanwhile at the surface, high pressure continues to build in from the Ohio Valley, with more of a northeasterly flow along the lee of the Appa...