| Point Forecast: 11 Miles NNW Snoqualmie Pass WA 47.54N 121.54W (Elev. 392 m) |
Last Update: 2:19 am PDT May 18, 2025 |
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| Date | 05/18 | 05/19 | ||||||||||||||||||||||
| Hour (PDT) | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 |
| Temperature (°C) | 4 | 4 | 4 | 4 | 3 | 3 | 3 | 4 | 4 | 5 | 6 | 7 | 7 | 7 | 7 | 8 | 8 | 8 | 7 | 7 | 6 | 6 | 5 | 4 |
| Dewpoint (°C) | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 4 | 4 | 5 | 5 | 5 | 5 | 5 | 5 | 4 | 4 | 3 | 3 | 3 | 2 |
| Heat Index (°C) | ||||||||||||||||||||||||
| Surface Wind (mph) | 5 | 5 | 5 | 6 | 6 | 6 | 6 | 6 | 7 | 7 | 7 | 8 | 7 | 7 | 7 | 6 | 6 | 6 | 5 | 5 | 3 | 3 | 3 | 3 |
| Wind Dir | WSW | WSW | WSW | WSW | WSW | WSW | WSW | WSW | WSW | WSW | WSW | W | W | WSW | W | W | W | WSW | WSW | WSW | SW | SW | SW | S |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 94 | 93 | 93 | 92 | 93 | 93 | 89 | 86 | 87 | 81 | 76 | 78 | 66 | 81 | 77 | 83 | 82 | 78 | 81 | 76 | 83 | 75 | 74 | 66 |
| Precipitation Potential (%) | 78 | 63 | 62 | 74 | 82 | 88 | 74 | 60 | 56 | 55 | 57 | 45 | 39 | 44 | 39 | 33 | 20 | 14 | 12 | 5 | 2 | 1 | 4 | 5 |
| Relative Humidity (%) | 89 | 89 | 89 | 89 | 88 | 89 | 89 | 89 | 89 | 90 | 87 | 87 | 85 | 86 | 86 | 83 | 81 | 84 | 82 | 83 | 81 | 81 | 84 | 86 |
| Rain | Ocnl | Lkly | Lkly | Lkly | Ocnl | Ocnl | Lkly | Lkly | Lkly | Lkly | Lkly | Chc | Chc | Chc | Chc | Chc | SChc | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 05/20 | |||||||||||||||||||||||
| Hour (PDT) | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 |
| Temperature (°C) | 4 | 4 | 4 | 4 | 4 | 5 | 5 | 6 | 7 | 7 | 8 | 8 | 9 | 9 | 9 | 9 | 9 | 8 | 8 | 7 | 7 | 7 | 7 | 6 |
| Dewpoint (°C) | 2 | 1 | 2 | 2 | 2 | 3 | 3 | 5 | 6 | 6 | 7 | 8 | 8 | 8 | 8 | 7 | 7 | 6 | 6 | 5 | 4 | 4 | 4 | 4 |
| Heat Index (°C) | ||||||||||||||||||||||||
| Surface Wind (mph) | 3 | 3 | 3 | 2 | 2 | 2 | 5 | 5 | 2 | 3 | 3 | 3 | 6 | 6 | 6 | 6 | 6 | 6 | 5 | 5 | 5 | 3 | 3 | 3 |
| Wind Dir | ESE | E | E | E | E | E | ESE | SE | SSE | S | S | S | SW | SW | SW | WSW | WSW | WSW | WSW | WSW | WSW | WSW | WSW | WSW |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 67 | 79 | 88 | 100 | 100 | 100 | 100 | 100 | 100 | 95 | 95 | 95 | 95 | 95 | 95 | 98 | 98 | 98 | 98 | 98 | 98 | 89 | 89 | 89 |
| Precipitation Potential (%) | 9 | 15 | 33 | 100 | 100 | 100 | 100 | 100 | 100 | 92 | 92 | 92 | 92 | 92 | 92 | 96 | 96 | 96 | 96 | 96 | 96 | 83 | 83 | 83 |
| Relative Humidity (%) | 83 | 82 | 85 | 85 | 85 | 85 | 85 | 91 | 93 | 94 | 95 | 95 | 96 | 93 | 90 | 87 | 87 | 86 | 86 | 85 | 85 | 84 | 85 | 85 |
| Rain | -- | SChc | Chc | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
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