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Mill Run Reservoir, PA Weather Forecast
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Mill Run Reservoir Weather Forecast
| REST OF TONIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY |
 |  |  |  | |  |  | | | | | |
| Chance of Showers | Chance of T-Storm | Chance of T-Storm | Chance of Showers | Chance of Showers | Sunny | Mostly Clear | Sunny | Chance of Showers | Chance of Showers | Chance of Showers | Mostly Sunny |
| Lo: 69°FLo: 21°C | Hi: 79°FHi: 26°C | Lo: 69°FLo: 21°C | Hi: 81°FHi: 27°C | Lo: 59°FLo: 15°C | Hi: 79°FHi: 26°C | Lo: 59°FLo: 15°C | Hi: 81°FHi: 27°C | Lo: 61°FLo: 16°C | Hi: 75°FHi: 24°C | Lo: 55°FLo: 13°C | Hi: 75°FHi: 24°C |
| POP: 40% | POP: 100% | POP: 90% | POP: 40% | POP: 40% | POP: 50% | POP: 50% | POP: 40% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1200 AM EDT Sun Aug 16 2026 
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Mill Run Reservoir Forecast Discussion
Issued: 741 PM EDT Sat Aug 15 2026
Key Messages
1) Rain from thunderstorms could be very heavy over the Laurels and south-central mountains Sunday morning and again later in the day. There is still potential for some heavy rain to fall over the Lower Susquehanna Valley and Ridge-and-Valley region.
2) High pressure yields a short dry window before more storms arrive in mid-week.
Discussion
... KEY MESSAGE 1: Rain from thunderstorms could be very heavy over the Laurels and south-central mountains Sunday mo...