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Lostine Reservoir Weather Forecast
| TONIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY |
 | | |  |  |  |  |  |  | | | |
| Smoke | Smoke | Smoke | Partly Cloudy | Mostly Cloudy | Chance of T-Storm | Chance of Showers | Mostly Clear | Mostly Clear | Sunny | Chance of Showers | Partly Cloudy |
| Lo: 56°FLo: 13°C | Lo: 60°FLo: 16°C | Lo: 69°FLo: 21°C | Lo: 50°FLo: 10°C | Lo: 56°FLo: 13°C | |||||||
| POP: 20% | POP: 20% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 302 PM PDT Wed Aug 19 2026 
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Lostine Reservoir Forecast Discussion
Issued: 1002 PM PDT Wed Aug 19 2026
Key Messages
- Dry and warm weather through Friday.
- Low pressure will approach the region on Friday and will move inland late Friday night or early Saturday, bring shower and thunderstorm chances, mainly to the mountains and gusty winds.
- Fire weather conditions look to become elevated, if not critical as we approach the weekend.
Discussion
... Southwesterly flow will remain over the Pacific Northwest as the region remains between a large area of high pressure over the fo...