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| Point Forecast: 17 Miles ENE Mount St Helens WA 46.27N 121.86W (Elev. 4833 ft) |
Last Update: 7:01 am PDT Aug 1, 2021 |
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| Date | 08/01 | 08/02 | ||||||||||||||||||||||
| 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 (°F) | 63 | 65 | 67 | 69 | 70 | 72 | 72 | 73 | 73 | 72 | 71 | 69 | 66 | 64 | 63 | 62 | 61 | 61 | 60 | 59 | 58 | 58 | 60 | 63 |
| Dewpoint (°F) | 53 | 53 | 54 | 54 | 54 | 55 | 54 | 55 | 56 | 56 | 56 | 56 | 55 | 55 | 55 | 55 | 54 | 54 | 53 | 53 | 53 | 52 | 52 | 52 |
| Heat Index (°F) | ||||||||||||||||||||||||
| Surface Wind (mph) | 2 | 2 | 2 | 6 | 6 | 6 | 8 | 8 | 8 | 8 | 8 | 8 | 6 | 6 | 6 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 |
| Wind Dir | WNW | WNW | WNW | W | W | W | NNW | NNW | NNW | NNW | NNW | NNW | NNW | NNW | NNW | N | N | N | N | N | N | N | N | N |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 48 | 48 | 48 | 42 | 42 | 42 | 32 | 32 | 32 | 23 | 23 | 23 | 21 | 21 | 21 | 25 | 25 | 25 | 18 | 18 | 18 | 15 | 15 | 15 |
| Precipitation Potential (%) | 5 | 5 | 5 | 2 | 2 | 2 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 2 | 2 |
| Relative Humidity (%) | 69 | 66 | 62 | 59 | 56 | 55 | 54 | 54 | 55 | 57 | 60 | 63 | 68 | 72 | 75 | 77 | 77 | 77 | 77 | 80 | 82 | 81 | 76 | 67 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 08/03 | |||||||||||||||||||||||
| 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 (°F) | 66 | 70 | 72 | 75 | 77 | 78 | 80 | 80 | 80 | 78 | 75 | 72 | 69 | 66 | 64 | 63 | 63 | 63 | 63 | 61 | 60 | 59 | 60 | 63 |
| Dewpoint (°F) | 51 | 52 | 50 | 50 | 50 | 49 | 49 | 48 | 48 | 47 | 48 | 48 | 48 | 47 | 47 | 47 | 46 | 46 | 46 | 45 | 46 | 45 | 45 | 45 |
| Heat Index (°F) | 76 | 77 | 78 | 78 | 77 | 76 | ||||||||||||||||||
| Surface Wind (mph) | 3 | 3 | 3 | 5 | 5 | 5 | 7 | 7 | 7 | 9 | 9 | 9 | 6 | 6 | 6 | 7 | 7 | 7 | 5 | 5 | 5 | 5 | 5 | 5 |
| Wind Dir | N | N | N | NW | NW | NW | NW | NW | NW | NNW | NNW | NNW | NNW | NNW | NNW | N | N | N | ENE | ENE | ENE | ENE | ENE | ENE |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 10 | 10 | 10 | 12 | 12 | 12 | 15 | 15 | 15 | 28 | 28 | 28 | 29 | 29 | 29 | 16 | 16 | 16 | 9 | 9 | 9 | 11 | 11 | 11 |
| Precipitation Potential (%) | 2 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 |
| Relative Humidity (%) | 58 | 52 | 46 | 42 | 39 | 36 | 34 | 33 | 33 | 34 | 38 | 42 | 47 | 51 | 54 | 55 | 54 | 53 | 54 | 56 | 60 | 60 | 57 | 51 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
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