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Penn Lake Weather Forecast
| TONIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY |
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| Snow | Rain and Snow | Rain and Snow | Snow | Chance of Snow | Snow | Rain and Snow | Rain and Snow | Rain and Snow | Rain and Snow | Rain and Snow | Rain and Snow |
| POP: 100% | POP: 100% | POP: 100% | POP: 90% | POP: 70% | POP: 100% | POP: 70% | POP: 70% | POP: 20% | POP: 40% | POP: 20% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 502 PM PDT Sun Oct 25 2026 
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Issued: 500 PM PDT Sun Oct 25 2026
Aviation
...Through 00z Tuesday...Moist, southwest flow aloft continues ahead of a low pressure system off the Washington coast this evening. A cold frontal rain band pushing into the Cascades will eventually slide east of the Cascades after 08z Monday. Flight conditions remain predominately MVFR as of 00z Mon, but conditions are likely to improve to VFR at most inland terminals by 03-04z, if not sooner, as precipitation eases behind the main frontal band. KONP likely remains IFR to LIFR through ...