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| Point Forecast: 17 Miles ENE Mount St Helens WA 46.27N 121.86W (Elev. 4833 ft) |
Last Update: 2:02 am PDT Jul 27, 2021 |
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| Date | 07/27 | 07/28 | ||||||||||||||||||||||
| 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 (°F) | 54 | 54 | 53 | 53 | 54 | 55 | 57 | 60 | 63 | 66 | 68 | 70 | 71 | 71 | 71 | 69 | 68 | 65 | 63 | 60 | 58 | 56 | 55 | 55 |
| Dewpoint (°F) | 45 | 44 | 44 | 43 | 43 | 43 | 44 | 44 | 44 | 45 | 45 | 46 | 46 | 46 | 47 | 47 | 47 | 46 | 46 | 45 | 45 | 44 | 44 | 43 |
| Heat Index (°F) | ||||||||||||||||||||||||
| Surface Wind (mph) | 5 | 5 | 5 | 5 | 5 | 5 | 6 | 6 | 6 | 6 | 6 | 6 | 8 | 8 | 8 | 7 | 7 | 7 | 6 | 6 | 6 | 5 | 5 | 5 |
| Wind Dir | N | N | N | N | N | N | N | N | N | NNW | NNW | NNW | NW | NW | NW | NW | NW | NW | NNW | NNW | NNW | NNW | NNW | NNW |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 100 | 96 | 100 | 100 | 100 | 88 | 76 | 77 | 87 | 91 | 84 | 77 | 92 | 87 | 84 | 92 | 91 | 84 | 80 | 100 | 90 | 87 | ||
| Precipitation Potential (%) | 0 | 0 | 0 | 4 | 5 | 5 | 5 | 4 | 5 | 5 | 4 | 5 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 2 | 2 | 2 |
| Relative Humidity (%) | 71 | 69 | 71 | 69 | 66 | 64 | 62 | 55 | 50 | 47 | 43 | 42 | 41 | 41 | 42 | 45 | 47 | 50 | 54 | 58 | 62 | 64 | 66 | 64 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 07/29 | |||||||||||||||||||||||
| 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 (°F) | 55 | 54 | 53 | 53 | 55 | 57 | 60 | 62 | 65 | 67 | 69 | 71 | 72 | 73 | 73 | 72 | 70 | 68 | 65 | 63 | 62 | 61 | 60 | 59 |
| Dewpoint (°F) | 43 | 42 | 42 | 41 | 41 | 41 | 41 | 42 | 42 | 42 | 42 | 42 | 42 | 43 | 43 | 43 | 43 | 43 | 43 | 42 | 42 | 42 | 42 | 42 |
| Heat Index (°F) | ||||||||||||||||||||||||
| Surface Wind (mph) | 3 | 3 | 3 | 5 | 5 | 5 | 3 | 3 | 3 | 2 | 2 | 2 | 3 | 3 | 3 | 6 | 6 | 6 | 6 | 6 | 6 | 5 | 5 | 5 |
| Wind Dir | N | N | N | N | N | N | N | N | N | WNW | WNW | WNW | WNW | WNW | WNW | NW | NW | NW | NW | NW | NW | N | N | N |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 52 | 52 | 52 | 43 | 43 | 43 | 16 | 16 | 16 | 34 | 34 | 34 | 41 | 41 | 41 | 45 | 45 | 45 | 37 | 37 | 37 | 33 | 33 | 33 |
| Precipitation Potential (%) | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Relative Humidity (%) | 64 | 64 | 66 | 64 | 59 | 55 | 49 | 48 | 43 | 40 | 37 | 35 | 34 | 34 | 34 | 35 | 38 | 40 | 45 | 46 | 48 | 49 | 51 | 53 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
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