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| Point Forecast: Martinsburg Arpt WV 39.41N 77.97W (Elev. 499 ft) |
Last Update: 10:33 pm EDT May 19, 2022 |
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| Date | 05/20 | |||||||||||||||||||||||
| Hour (EDT) | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 |
| Temperature (°F) | 63 | 62 | 60 | 60 | 59 | 58 | 59 | 60 | 64 | 69 | 75 | 79 | 82 | 85 | 86 | 87 | 88 | 89 | 88 | 86 | 83 | 80 | 78 | 75 |
| Dewpoint (°F) | 54 | 54 | 54 | 54 | 54 | 53 | 53 | 55 | 57 | 59 | 60 | 62 | 62 | 62 | 63 | 63 | 63 | 63 | 63 | 63 | 63 | 63 | 62 | 62 |
| Heat Index (°F) | 75 | 79 | 83 | 86 | 87 | 88 | 89 | 90 | 89 | 87 | 84 | 81 | 78 | 75 | ||||||||||
| Surface Wind (mph) | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 6 | 8 | 7 | 10 | 10 | 10 | 10 | 9 | 8 | 7 | 6 | 5 | 5 | 5 |
| Wind Dir | SW | S | S | S | S | S | SE | SE | S | S | S | S | S | S | S | S | S | S | S | S | S | S | S | S |
| Gust | 18 | 20 | 18 | 20 | ||||||||||||||||||||
| Sky Cover (%) | 25 | 35 | 44 | 48 | 53 | 57 | 59 | 62 | 64 | 64 | 41 | 48 | 53 | 70 | 55 | 60 | 61 | 67 | 73 | 65 | 65 | 58 | 40 | 31 |
| Precipitation Potential (%) | 1 | 5 | 13 | 13 | 13 | 30 | 30 | 30 | 20 | 20 | 20 | 25 | 25 | 25 | 22 | 22 | 22 | 23 | 23 | 23 | 6 | 6 | 6 | 6 |
| Relative Humidity (%) | 72 | 75 | 81 | 81 | 83 | 83 | 80 | 84 | 78 | 70 | 60 | 56 | 51 | 46 | 46 | 45 | 43 | 42 | 43 | 46 | 51 | 56 | 58 | 64 |
| Rain | -- | -- | -- | -- | -- | Chc | Chc | Chc | SChc | SChc | SChc | Chc | Chc | Chc | SChc | SChc | SChc | SChc | SChc | SChc | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | SChc | SChc | SChc | -- | -- | -- | SChc | SChc | SChc | SChc | SChc | SChc | SChc | SChc | SChc | -- | -- | -- | -- |
| Date | 05/21 | |||||||||||||||||||||||
| Hour (EDT) | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 |
| Temperature (°F) | 73 | 73 | 72 | 70 | 68 | 67 | 69 | 71 | 74 | 78 | 82 | 86 | 89 | 90 | 91 | 92 | 92 | 91 | 89 | 87 | 84 | 81 | 78 | 74 |
| Dewpoint (°F) | 61 | 61 | 60 | 59 | 59 | 59 | 60 | 61 | 62 | 63 | 63 | 63 | 63 | 62 | 62 | 62 | 62 | 62 | 62 | 62 | 62 | 62 | 61 | 61 |
| Heat Index (°F) | 78 | 83 | 87 | 90 | 90 | 92 | 93 | 93 | 92 | 89 | 87 | 85 | 82 | 78 | ||||||||||
| Surface Wind (mph) | 5 | 5 | 5 | 3 | 3 | 2 | 2 | 2 | 2 | 3 | 5 | 6 | 6 | 7 | 7 | 8 | 9 | 9 | 8 | 7 | 6 | 5 | 3 | 3 |
| Wind Dir | S | SW | SW | SW | SW | SW | SW | SW | SW | SW | W | W | SW | SW | S | S | S | S | S | S | S | S | SW | SW |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 32 | 31 | 26 | 22 | 18 | 13 | 13 | 13 | 13 | 16 | 22 | 25 | 27 | 31 | 33 | 32 | 29 | 27 | 28 | 29 | 30 | 34 | 43 | 47 |
| Precipitation Potential (%) | 6 | 6 | 2 | 2 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 26 | 26 | 26 | 26 | 26 | 26 | 18 | 18 | 18 | 18 |
| Relative Humidity (%) | 66 | 66 | 66 | 68 | 73 | 75 | 73 | 71 | 66 | 60 | 53 | 46 | 42 | 39 | 38 | 37 | 37 | 38 | 41 | 43 | 48 | 53 | 56 | 64 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | Chc | Chc | Chc | Chc | Chc | Chc | SChc | SChc | SChc | SChc |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | SChc | SChc | SChc | Chc | Chc | Chc | SChc | SChc | SChc | -- |
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