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| Point Forecast: 2 Miles S Mount St Helens WA 46.16N 122.2W (Elev. 3691 ft) |
Last Update: 10:02 pm PDT May 5, 2021 |
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| Date | 05/05 | 05/06 | ||||||||||||||||||||||
| Hour (PDT) | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 |
| Temperature (°F) | 56 | 55 | 54 | 53 | 52 | 51 | 48 | 46 | 45 | 45 | 46 | 47 | 48 | 50 | 52 | 53 | 53 | 51 | 50 | 48 | 46 | 45 | 44 | 42 |
| Dewpoint (°F) | 29 | 28 | 28 | 29 | 30 | 31 | 27 | 30 | 32 | 33 | 33 | 31 | 29 | 29 | 33 | 37 | 41 | 43 | 43 | 43 | 43 | 43 | 42 | 41 |
| Wind Chill (°F) | 48 | 45 | 44 | 44 | 44 | 46 | 48 | 48 | 46 | 44 | 42 | 40 | 38 | 36 | ||||||||||
| Surface Wind (mph) | 11 | 8 | 8 | 8 | 2 | 2 | 2 | 3 | 3 | 3 | 3 | 3 | 3 | 7 | 7 | 7 | 8 | 8 | 8 | 9 | 9 | 9 | 11 | 11 |
| Wind Dir | E | E | E | E | WNW | WNW | WNW | WNW | WNW | WNW | W | W | W | SW | SW | SW | SW | SW | SW | WSW | WSW | WSW | W | W |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 55 | 48 | 48 | 48 | 52 | 52 | 52 | 57 | 57 | 57 | 58 | 58 | 58 | 81 | 81 | 81 | 97 | 97 | 97 | 97 | 97 | 97 | 93 | 93 |
| Precipitation Potential (%) | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 5 | 5 | 5 | 5 | 5 | 5 | 77 | 77 | 77 | 77 | 77 | 77 | 83 | 83 | 83 | 83 | 83 |
| Relative Humidity (%) | 36 | 36 | 37 | 39 | 43 | 47 | 43 | 52 | 59 | 63 | 61 | 54 | 46 | 44 | 47 | 55 | 64 | 71 | 77 | 82 | 87 | 90 | 93 | 94 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Snow | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Freezing Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Sleet | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 05/07 | |||||||||||||||||||||||
| Hour (PDT) | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 |
| Temperature (°F) | 41 | 39 | 37 | 37 | 36 | 35 | 34 | 34 | 34 | 35 | 36 | 37 | 37 | 38 | 39 | 40 | 41 | 42 | 42 | 42 | 41 | 40 | 39 | 37 |
| Dewpoint (°F) | 39 | 38 | 36 | 32 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 32 | 32 | 32 |
| Wind Chill (°F) | 34 | 33 | 31 | 30 | 29 | 27 | 26 | 27 | 27 | 28 | 29 | 30 | 30 | 31 | 32 | 33 | 33 | 34 | 34 | 36 | 35 | 33 | 32 | 29 |
| Surface Wind (mph) | 11 | 9 | 9 | 9 | 10 | 10 | 10 | 9 | 9 | 9 | 9 | 9 | 9 | 11 | 11 | 11 | 15 | 15 | 15 | 10 | 10 | 10 | 11 | 11 |
| Wind Dir | W | W | W | W | W | W | W | W | W | W | W | W | W | W | W | W | WNW | WNW | WNW | W | W | W | WNW | WNW |
| Gust | 23 | 23 | 23 | |||||||||||||||||||||
| Sky Cover (%) | 93 | 87 | 87 | 87 | 90 | 90 | 90 | 95 | 95 | 95 | 77 | 77 | 77 | 79 | 79 | 79 | 77 | 77 | 77 | 71 | 71 | 71 | 65 | 65 |
| Precipitation Potential (%) | 83 | 82 | 82 | 82 | 82 | 82 | 82 | 71 | 71 | 71 | 71 | 71 | 71 | 74 | 74 | 74 | 74 | 74 | 74 | 35 | 35 | 35 | 35 | 35 |
| Relative Humidity (%) | 94 | 94 | 95 | 81 | 87 | 91 | 94 | 96 | 95 | 92 | 89 | 86 | 84 | 82 | 79 | 76 | 73 | 71 | 70 | 71 | 73 | 73 | 77 | 81 |
| Rain | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | -- | -- | -- | -- | -- | -- | Lkly | Lkly | Lkly | Lkly | Lkly | Lkly | Chc | Chc | Chc | Chc | Chc |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | SChc | SChc | SChc | SChc | SChc | SChc | -- | -- | -- | -- | -- |
| Snow | -- | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Lkly | Lkly | Lkly | Lkly | Lkly | Lkly | Lkly | Lkly | Lkly | Chc | Chc | Chc | Chc | Chc |
| Freezing Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Sleet | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
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