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Tumbling Run Trail, PA Weather Forecast
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Tumbling Run Trail Weather Forecast
| OVERNIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY |
 | |  |  |  | | |  | | | | |
| Patchy Fog | Patchy Fog | Partly Cloudy | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Mostly Sunny | Partly Cloudy | Mostly Sunny | Partly Cloudy | Mostly Sunny |
| Lo: 55°FLo: 13°C | Hi: 75°FHi: 24°C | Lo: 59°FLo: 15°C | Hi: 71°FHi: 22°C | Lo: 60°FLo: 16°C | Hi: 71°FHi: 22°C | Lo: 55°FLo: 13°C | Hi: 70°FHi: 21°C | Lo: 51°FLo: 11°C | Hi: 71°FHi: 22°C | Lo: 55°FLo: 13°C | Hi: 75°FHi: 24°C |
| POP: 70% | POP: 70% | POP: 40% | POP: 40% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1030 PM EDT Thu Aug 20 2026 
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Tumbling Run Trail Forecast Discussion
Issued: 839 PM EDT Thu Aug 20 2026
Key Messages
1) Areas of dense fog possible tonight.
2) An unsettled weekend will be bookended by fair weather Friday and early next week.
Discussion
... KEY MESSAGE 1: Areas of dense fog possible tonight.
Widespread rainfall today followed by clearing conditions, diminishing winds, and high pressure building in tonight should allow for formation of radiation fog primarily in the valleys. Some of the fog may become locally dense with vis 1/4 mi or less into early Friday ...