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| Point Forecast: 17 Miles ENE Mount St Helens WA 46.27N 121.86W (Elev. 4833 ft) |
Last Update: 11:03 am PST Dec 4, 2021 |
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| Date | 12/04 | 12/05 | ||||||||||||||||||||||
| Hour (PST) | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 |
| Temperature (°F) | 31 | 32 | 33 | 35 | 36 | 36 | 36 | 34 | 32 | 30 | 27 | 25 | 23 | 22 | 21 | 21 | 21 | 20 | 20 | 19 | 19 | 20 | 21 | 22 |
| Dewpoint (°F) | 27 | 27 | 26 | 26 | 26 | 26 | 25 | 25 | 24 | 24 | 23 | 23 | 22 | 22 | 21 | 21 | 20 | 20 | 19 | 19 | 19 | 18 | 18 | 18 |
| Wind Chill (°F) | 18 | 19 | 21 | 24 | 25 | 25 | 25 | 22 | 20 | 17 | 14 | 12 | 10 | 8 | 8 | 8 | 8 | 7 | 7 | 6 | 7 | 8 | 9 | 11 |
| Surface Wind (mph) | 17 | 20 | 18 | 16 | 16 | 16 | 16 | 15 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 11 | 11 | 11 | 10 |
| Wind Dir | SSW | SW | SW | SW | SW | SW | WSW | W | WNW | WNW | WNW | NW | NW | NW | WNW | WNW | WNW | NW | NW | NW | WNW | WNW | WNW | W |
| Gust | 29 | 31 | 30 | 29 | 28 | 28 | 28 | 25 | 24 | 24 | 24 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | ||||
| Sky Cover (%) | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 97 | 91 | 88 | 78 | 77 | 58 | 62 | 60 | 51 | 37 | 45 | 32 | 33 | 38 | 35 | 35 | 35 |
| Precipitation Potential (%) | 100 | 100 | 96 | 96 | 96 | 64 | 64 | 64 | 26 | 26 | 26 | 2 | 2 | 2 | 6 | 6 | 6 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Relative Humidity (%) | 84 | 81 | 74 | 71 | 68 | 67 | 64 | 69 | 72 | 78 | 85 | 92 | 96 | 100 | 100 | 100 | 96 | 100 | 96 | 100 | 100 | 92 | 88 | 84 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Snow | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Lkly | Lkly | Lkly | Chc | Chc | Chc | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Freezing Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Sleet | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 12/06 | |||||||||||||||||||||||
| Hour (PST) | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 |
| Temperature (°F) | 24 | 26 | 27 | 28 | 28 | 27 | 26 | 25 | 25 | 26 | 27 | 27 | 26 | 24 | 23 | 23 | 24 | 24 | 25 | 24 | 24 | 25 | 25 | 26 |
| Dewpoint (°F) | 17 | 17 | 17 | 16 | 16 | 16 | 16 | 17 | 17 | 18 | 18 | 19 | 19 | 20 | 20 | 21 | 21 | 22 | 22 | 22 | 23 | 23 | 24 | 24 |
| Wind Chill (°F) | 14 | 16 | 18 | 19 | 19 | 18 | 17 | 16 | 14 | 15 | 17 | 17 | 15 | 13 | 11 | 11 | 12 | 11 | 13 | 11 | 12 | 13 | 13 | 15 |
| Surface Wind (mph) | 10 | 10 | 9 | 9 | 9 | 9 | 9 | 9 | 11 | 11 | 11 | 11 | 11 | 11 | 14 | 14 | 14 | 15 | 15 | 15 | 14 | 14 | 14 | 13 |
| Wind Dir | W | W | W | W | W | WSW | WSW | WSW | WSW | WSW | WSW | SW | SW | SW | SSW | SSW | SSW | SSW | SSW | SSW | SSW | SSW | SSW | SW |
| Gust | 20 | 20 | 20 | 24 | 24 | 24 | 23 | 23 | 23 | 21 | ||||||||||||||
| Sky Cover (%) | 41 | 47 | 53 | 55 | 58 | 60 | 63 | 67 | 70 | 72 | 73 | 75 | 77 | 80 | 82 | 87 | 96 | 100 | 100 | 100 | 100 | 100 | 100 | 100 |
| Precipitation Potential (%) | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 46 | 46 | 46 | 46 | 46 | 46 | 100 | 100 | 100 | 100 | 100 | 100 | 89 |
| Relative Humidity (%) | 74 | 68 | 65 | 60 | 60 | 63 | 65 | 71 | 71 | 71 | 68 | 71 | 74 | 84 | 88 | 92 | 88 | 92 | 88 | 92 | 96 | 92 | 96 | 92 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Snow | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | Chc | Chc | Chc | Chc | Chc | Chc | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl |
| Freezing Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Sleet | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
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