| Point Forecast: 17 Miles ENE Mount St Helens WA 46.27N 121.86W (Elev. 1473 m) |
Last Update: 8:41 am PDT May 19, 2024 |
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| Date | 05/19 | 05/20 | ||||||||||||||||||||||
| Hour (PDT) | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 |
| Temperature (°C) | 1 | 1 | 1 | 2 | 3 | 4 | 4 | 4 | 5 | 4 | 4 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 2 |
| Dewpoint (°C) | -2 | -2 | -2 | -2 | -1 | 0 | 0 | -1 | 1 | 0 | 0 | 1 | 0 | 1 | 0 | -1 | 0 | 0 | -1 | -1 | -2 | -2 | -1 | -1 |
| Heat Index (°C) | ||||||||||||||||||||||||
| Surface Wind (mph) | 6 | 5 | 6 | 7 | 8 | 7 | 8 | 9 | 9 | 9 | 9 | 8 | 8 | 8 | 7 | 6 | 7 | 7 | 7 | 7 | 8 | 8 | 8 | 8 |
| Wind Dir | NW | WNW | NW | NW | WNW | NW | NW | NNW | NNW | NNW | NNW | NNW | NW | WNW | NNW | N | N | N | N | N | N | N | N | N |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 77 | 77 | 77 | 74 | 70 | 71 | 67 | 63 | 68 | 65 | 66 | 64 | 57 | 60 | 62 | 65 | 64 | 68 | 63 | 57 | 52 | 52 | 45 | 40 |
| Precipitation Potential (%) | 18 | 18 | 18 | 44 | 44 | 44 | 44 | 44 | 44 | 10 | 10 | 10 | 10 | 10 | 10 | 3 | 3 | 3 | 3 | 3 | 3 | 0 | 0 | 0 |
| Relative Humidity (%) | 83 | 81 | 81 | 80 | 79 | 76 | 77 | 74 | 73 | 75 | 77 | 78 | 81 | 87 | 89 | 90 | 88 | 87 | 86 | 86 | 85 | 83 | 85 | 83 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 05/21 | |||||||||||||||||||||||
| Hour (PDT) | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 |
| Temperature (°C) | 3 | 4 | 6 | 7 | 7 | 8 | 8 | 8 | 8 | 8 | 8 | 7 | 6 | 5 | 4 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 2 |
| Dewpoint (°C) | -1 | -1 | 0 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 0 | 0 | -1 | -1 | -2 | -1 | -1 |
| Heat Index (°C) | ||||||||||||||||||||||||
| Surface Wind (mph) | 7 | 7 | 7 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 6 | 6 | 6 | 1 | 1 | 1 | 2 | 2 | 2 | 6 | 6 | 6 |
| Wind Dir | N | N | N | N | N | N | NNW | NNW | NNW | NNW | NNW | NNW | NW | NW | NW | ENE | ENE | ENE | WNW | WNW | WNW | W | W | W |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 32 | 15 | 16 | 17 | 17 | 17 | 27 | 27 | 27 | 22 | 22 | 22 | 27 | 27 | 27 | 48 | 48 | 48 | 55 | 55 | 55 | 62 | 62 | 62 |
| Precipitation Potential (%) | 0 | 0 | 0 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 10 | 10 | 10 | 10 | 10 | 10 | 49 | 49 | 49 |
| Relative Humidity (%) | 77 | 71 | 69 | 66 | 65 | 63 | 62 | 62 | 62 | 62 | 65 | 69 | 72 | 76 | 81 | 85 | 85 | 84 | 84 | 82 | 81 | 79 | 79 | 79 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | Chc | Chc | Chc |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
