Weather archive on Mount Washington (AWS)
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| Date / Local time | T | Po | P | Pa | U | DD | Ff | ff10 | ff3 | N | WW | W1 | W2 | Tn | Tx | Cl | Nh | H | Cm | Ch | VV | Td | RRR | tR | E | Tg | E' | sss | |
| 2024 December 19, Thursday | 10 | -12.1 10 | 600.3 23.63 800.33 800.33 | 100 | Wind blowing from the west-northwest | Violent storm (31 m/s) (112 km/h) (69 miles/hour) (60 knots) (11 Bft) | Sky obscured by fog and/or other meteorological phenomena. Sky obscured by fog and/or other meteorological phenomena. Sky obscured by fog and/or other meteorological phenomena. | Continuous fall of snowflakes, slight at time of observation. | Snow and/or other types of solid precipitation | Fog or ice fog or thick haze. | less than 0.1 less than 0.06 | -12.1 10 | |||||||||||||||||
09 | -11.2 12 | 599.2 23.59 798.87 798.87 | 100 | Wind blowing from the west-northwest | Hurricane (33 m/s) (119 km/h) (74 mph) (64 knots) (12 Bft) | Sky obscured by fog and/or other meteorological phenomena. Sky obscured by fog and/or other meteorological phenomena. Sky obscured by fog and/or other meteorological phenomena. | Continuous fall of snowflakes, slight at time of observation. Depth of newly fallen snow is 2 cm. 0.8 inches. | Snow and/or other types of solid precipitation | Fog or ice fog or thick haze. | -11.2 12 | -5.4 22 | less than 0.1 less than 0.06 | -11.2 12 | 3.0 0.12 | 6 | ||||||||||||||
| December 18, Wednesday | 13 | -6.5 20 | 602.2 23.71 802.87 802.87 | -1.1 -0.04 -1.47 -1.47 | 78 | Wind blowing from the west | Near gale (15 m/s) (54 km/h) (34 mph) (29 knots) (7 Bft) | 90 or more, but not 100% 9/10 or more, but not 10/10 7 oktas or more, but not 8 oktas | Clouds generally forming or developing. | Fog or ice fog or thick haze. | Cloud covering more than 1/2 of the sky throughout the appropriate period. | -9.3 15 | -5.6 22 | Stratus nebulosus or Stratus fractus other than of bad weather, or both. | 90 or more, but not 100% 9/10 or more, but not 10/10 7 oktas or more, but not 8 oktas | Altocumulus translucidus or opacus in two or more layers, or Altocumulus opacus in a single layer, not progressively invading the sky, or Altocumulus with Altostratus or Nimbostratus. | Cirrostratus covering the whole sky. | 71.0 44.1 | -9.8 14 | ||||||||||
10 | -7.3 19 | 603.3 23.75 804.33 804.33 | 0.5 0.02 0.67 0.67 | 71 | Wind blowing from the west | Near gale (17 m/s) (61 km/h) (38 miles/hour) (33 knots) (7 Bft) | 100%. 10/10. 8 oktas | Fog or ice fog in patches. | Fog or ice fog or thick haze. | Cloud covering more than 1/2 of the sky throughout the appropriate period. | Stratus nebulosus or Stratus fractus other than of bad weather, or both. | 90 or more, but not 100% 9/10 or more, but not 10/10 7 oktas or more, but not 8 oktas | No Altocumulus, Altostratus or Nimbostratus. | Cirrostratus covering the whole sky. | 71.0 44.1 | -11.7 11 | |||||||||||||