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| Point Forecast: 3 Miles NE Donner Summit CA 39.36N 120.35W (Elev. 2289 m) |
Last Update: 9:49 pm PDT Sep 28, 2023 |
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| Date | 09/28 | 09/29 | ||||||||||||||||||||||
| Hour (PDT) | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 |
| Temperature (°C) | 4 | 3 | 4 | 3 | 3 | 3 | 2 | 2 | 2 | 4 | 6 | 9 | 11 | 11 | 11 | 11 | 11 | 10 | 9 | 8 | 7 | 5 | 4 | 4 |
| Dewpoint (°C) | -1 | -2 | -2 | -2 | -3 | -3 | -3 | -3 | -2 | -2 | -1 | -1 | 1 | 1 | 1 | 1 | 3 | 3 | 4 | 5 | 5 | 5 | 4 | 4 |
| Wind Chill (°C) | 2 | 1 | 2 | 1 | 1 | 0 | -1 | -1 | -1 | 1 | 3 | 6 | 7 | 6 | 5 | 2 | 1 | 0 | -1 | |||||
| Surface Wind (mph) | 5 | 5 | 5 | 5 | 6 | 6 | 6 | 6 | 7 | 8 | 10 | 14 | 15 | 16 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 15 | 15 | 15 |
| Wind Dir | WNW | W | WSW | WSW | WSW | WSW | WSW | WSW | WSW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 6 | 6 | 1 | 6 | 11 | 3 | 2 | 3 | 3 | 8 | 3 | 3 | 7 | 19 | 27 | 37 | 27 | 44 | 86 | 86 | 86 | 86 | 86 | 86 |
| Precipitation Potential (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 1 | 1 | 1 | 2 | 2 | 3 | 4 | 5 | 46 | 46 | 46 | 46 | 46 | 46 |
| Relative Humidity (%) | 70 | 70 | 67 | 67 | 66 | 67 | 70 | 71 | 75 | 67 | 58 | 52 | 49 | 49 | 48 | 50 | 56 | 62 | 69 | 77 | 88 | 100 | 100 | 100 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | Chc | Chc | Chc | Chc | Chc | Chc |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Snow | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Freezing Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Sleet | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 09/30 | |||||||||||||||||||||||
| Hour (PDT) | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 |
| Temperature (°C) | 4 | 4 | 3 | 3 | 3 | 3 | 2 | 2 | 2 | 1 | 2 | 3 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 3 | 3 | 2 |
| Dewpoint (°C) | 4 | 4 | 3 | 3 | 3 | 3 | 2 | 2 | 1 | 1 | 2 | 3 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 3 | 3 | 3 | 3 | 2 |
| Wind Chill (°C) | -1 | -1 | -1 | -1 | -2 | -2 | -2 | -2 | -3 | -2 | -2 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | -1 |
| Surface Wind (mph) | 13 | 13 | 13 | 13 | 13 | 13 | 10 | 10 | 10 | 8 | 8 | 8 | 9 | 9 | 9 | 9 | 9 | 9 | 8 | 8 | 8 | 6 | 6 | 6 |
| Wind Dir | SSW | SSW | SSW | SSW | SSW | SSW | SSW | SSW | SSW | SSW | SSW | SSW | SW | SW | SW | WSW | WSW | WSW | W | W | W | NW | NW | NW |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 74 | 74 | 74 | 72 | 72 | 72 | 78 | 78 | 78 | 80 | 80 | 80 | 88 | 88 | 88 | 88 | 88 | 88 | 80 | 80 | 80 | 81 | 81 | 81 |
| Precipitation Potential (%) | 58 | 58 | 58 | 58 | 58 | 58 | 51 | 51 | 51 | 51 | 51 | 51 | 82 | 82 | 82 | 82 | 82 | 82 | 69 | 69 | 69 | 69 | 69 | 69 |
| Relative Humidity (%) | 100 | 100 | 100 | 100 | 100 | 99 | 99 | 99 | 99 | 99 | 99 | 99 | 99 | 99 | 100 | 100 | 99 | 99 | 98 | 98 | 98 | 98 | 99 | 99 |
| Rain | Lkly | Lkly | Lkly | Lkly | Lkly | Lkly | Chc | Chc | Chc | Chc | Chc | Chc | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Ocnl | Lkly | Lkly | Lkly | Lkly | Lkly | Lkly |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | SChc | SChc | SChc | SChc | SChc | SChc | SChc | SChc | SChc | SChc | SChc | SChc |
| Snow | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Freezing Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Sleet | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
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