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| Point Forecast: 2 Miles NNW Washington DC 38.91N 77.05W (Elev. 89 ft) |
Last Update: 7:29 am EDT Mar 22, 2023 |
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| Date | 03/22 | 03/23 | ||||||||||||||||||||||
| Hour (EDT) | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 |
| Temperature (°F) | 51 | 55 | 58 | 61 | 63 | 63 | 64 | 63 | 63 | 60 | 57 | 55 | 55 | 54 | 52 | 52 | 51 | 51 | 51 | 51 | 51 | 52 | 52 | 55 |
| Dewpoint (°F) | 28 | 29 | 28 | 28 | 27 | 27 | 28 | 29 | 32 | 35 | 37 | 38 | 39 | 40 | 41 | 42 | 44 | 45 | 46 | 47 | 48 | 48 | 49 | 50 |
| Wind Chill (°F) | ||||||||||||||||||||||||
| Surface Wind (mph) | 8 | 9 | 10 | 10 | 11 | 11 | 11 | 11 | 10 | 9 | 8 | 8 | 8 | 8 | 7 | 8 | 8 | 8 | 9 | 9 | 9 | 10 | 11 | 11 |
| Wind Dir | S | S | S | S | S | S | S | S | S | S | S | S | S | S | S | S | S | S | S | S | S | S | SW | SW |
| Gust | 18 | 21 | 22 | 22 | 21 | 18 | 18 | |||||||||||||||||
| Sky Cover (%) | 73 | 70 | 68 | 65 | 63 | 62 | 61 | 60 | 63 | 65 | 68 | 68 | 69 | 69 | 70 | 71 | 71 | 72 | 73 | 74 | 75 | 76 | 77 | 79 |
| Precipitation Potential (%) | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 3 | 3 | 3 | 3 | 3 | 3 | 57 | 57 | 57 | 57 | 57 | 57 | 50 | 50 |
| Relative Humidity (%) | 41 | 37 | 32 | 28 | 25 | 25 | 25 | 27 | 31 | 39 | 47 | 53 | 55 | 59 | 66 | 69 | 77 | 80 | 83 | 86 | 89 | 86 | 89 | 83 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | Lkly | Lkly | Lkly | Lkly | Lkly | Lkly | Chc | Chc |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Snow | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Freezing Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Sleet | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Fog | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Mixing Height (x100ft) | 8 | 17 | 33 | 50 | 63 | 65 | 60 | 50 | 34 | 16 | 2 | 2 | 5 | 6 | 7 | 8 | 7 | 7 | 6 | 5 | 5 | 5 | 8 | |
| Haines Index | 4 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 4 | 4 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 2 | 2 | 2 |
| Lightning Activity Level | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Transport Wind (mph) | 13 | 16 | 17 | 18 | 18 | 20 | 21 | 20 | 16 | 12 | 8 | 9 | 13 | 15 | 14 | 13 | 12 | 12 | 13 | 14 | 15 | 15 | 16 | 18 |
| Transport Wind Dir | S | S | S | S | S | SW | SW | SW | SW | S | S | S | SW | SW | SW | SW | SW | SW | SW | S | S | SW | SW | SW |
| Ventilation Rate (x1000 mph-ft) | 11 | 27 | 56 | 91 | 113 | 130 | 126 | 100 | 54 | 19 | 2 | 0 | 2 | 8 | 9 | 10 | 9 | 9 | 9 | 8 | 8 | 7 | 8 | 14 |
| Date | 03/24 | |||||||||||||||||||||||
| Hour (EDT) | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 |
| Temperature (°F) | 58 | 62 | 65 | 68 | 70 | 73 | 75 | 76 | 75 | 74 | 72 | 71 | 69 | 68 | 67 | 65 | 64 | 63 | 61 | 60 | 59 | 57 | 56 | 56 |
| Dewpoint (°F) | 51 | 52 | 53 | 53 | 54 | 54 | 55 | 55 | 55 | 56 | 56 | 56 | 57 | 57 | 57 | 57 | 56 | 55 | 54 | 53 | 52 | 51 | 50 | 49 |
| Wind Chill (°F) | ||||||||||||||||||||||||
| Surface Wind (mph) | 11 | 13 | 13 | 14 | 15 | 16 | 16 | 16 | 15 | 14 | 14 | 13 | 13 | 13 | 11 | 11 | 10 | 9 | 8 | 8 | 8 | 9 | 10 | 10 |
| Wind Dir | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | W | W | W | W | W | NW | N | N | N |
| Gust | 21 | 22 | 24 | 25 | 26 | 28 | 28 | 28 | 25 | 22 | 20 | 20 | 20 | 20 | ||||||||||
| Sky Cover (%) | 81 | 82 | 79 | 76 | 73 | 67 | 62 | 57 | 61 | 64 | 68 | 66 | 63 | 61 | 66 | 71 | 76 | 79 | 81 | 84 | 86 | 88 | 89 | 89 |
| Precipitation Potential (%) | 50 | 50 | 20 | 20 | 9 | 9 | 9 | 9 | 9 | 9 | 43 | 43 | 43 | 43 | 43 | 43 | 56 | 56 | 56 | 56 | 56 | 56 | 76 | 76 |
| Relative Humidity (%) | 77 | 70 | 65 | 59 | 57 | 51 | 50 | 48 | 50 | 53 | 57 | 59 | 66 | 68 | 70 | 75 | 75 | 75 | 78 | 78 | 78 | 80 | 80 | 77 |
| Rain | Chc | Chc | SChc | SChc | -- | -- | -- | -- | -- | -- | Chc | Chc | Chc | Chc | Chc | Chc | Lkly | Lkly | Lkly | Lkly | Lkly | Lkly | Ocnl | Ocnl |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Snow | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Freezing Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Sleet | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Fog | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Mixing Height (x100ft) | 10 | 13 | 14 | 15 | 16 | 21 | 25 | 25 | 19 | 9 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 4 | 6 | ||
| Haines Index | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 2 | 2 | 2 |
| Lightning Activity Level | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Transport Wind (mph) | 20 | 21 | 20 | 18 | 18 | 21 | 23 | 24 | 21 | 15 | 10 | 9 | 10 | 10 | 10 | 9 | 8 | 6 | 5 | 3 | 5 | 6 | 8 | 9 |
| Transport Wind Dir | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW | W | N | NE | NE |
| Ventilation Rate (x1000 mph-ft) | 21 | 28 | 29 | 27 | 30 | 43 | 56 | 61 | 39 | 14 | 2 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | 1 | 3 | 5 |
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