Weather WorldReservoir Number Five, WA Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Reservoir Number Five Weather Forecast
| TODAY | TONIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT |
 |  | |  |  |  |  |  |  | | | |
| Patchy Fog | Partly Cloudy | Patchy Fog | Mostly Clear | Partly Sunny | Mostly Cloudy | Chance of T-Storm | Chance of Showers | Chance of Showers | Partly Cloudy | Partly Sunny | Partly Cloudy |
| Hi: 75°FHi: 24°C | Lo: 57°FLo: 14°C | Hi: 75°FHi: 24°C | Lo: 57°FLo: 14°C | Hi: 75°FHi: 24°C | Lo: 59°FLo: 15°C | Hi: 71°FHi: 22°C | Lo: 57°FLo: 14°C | Hi: 73°FHi: 23°C | Lo: 55°FLo: 13°C | Hi: 77°FHi: 25°C | Lo: 55°FLo: 13°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 236 AM PDT Wed Aug 19 2026 
Reservoir Number Five Radar Loop
Use the map search tool if you want to place a location marker on the radar map...
Reservoir Number Five Weather Map
Reservoir Number Five Quick Facts
Reservoir Number Five Forecast Discussion
Issued: 323 AM PDT Wed Aug 19 2026
Aviation
... Light southwesterly flow aloft with weak low level onshore flow through Thursday. LIFR ceilings with visibilities down to a mile or less above about 400 feet this morning. Ceilings over the interior lifting to IFR mid to late morning with just scattered clouds by 19-20z. Along the coast ceilings lifting to MVFR in the afternoon.
Stratus slowly moving back inland overnight getting just east of Puget Sound 12z-15z.
KSEA...Leading edge of the stratus deck 10-...