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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 | |
| 2025 December 18, Thursday | 19 | 20.5 69 | 695.2 27.37 926.86 926.86 | 760.9 29.96 1014.45 1014.45 | 1.1 0.04 1.47 1.47 | 74 | Wind blowing from the north-northeast | Light breeze (2 m/s) (7 km/h) (4 mph) (4 knots) (2 Bft) | 70 – 80%. 7/10 – 8/10. 6 oktas | 26.7 80 | No Stratocumulus, Stratus, Cumulus or Cumulonimbus. | 10% or less, but not 0 1/10 or less, but not zero 1 okta or less, but not 0 | 2500 or more, or no clouds. 8202 or more, or no clouds. | Patches (often lenticular) of Altocumulus translucidus, continually changing and occurring at one or more levels. | Cirrus (often in bands) and Cirrostratus, or Cirrostratus alone, progressively invading the sky; they generally thicken as a whole; the continuous veil extends more than 45 degrees above the horizon, without the sky being totally covered. | 20.0 12.4 | 15.6 60 | ||||||||||||
16 | 23.8 75 | 694.1 27.33 925.39 925.39 | 759.0 29.88 1011.92 1011.92 | -0.4 -0.02 -0.53 -0.53 | 63 | Wind blowing from the north-northeast | Light breeze (2 m/s) (7 km/h) (4 mph) (4 knots) (2 Bft) | 70 – 80%. 7/10 – 8/10. 6 oktas | Cumulus and Stratocumulus other than Stratocumulus cumulogenitus, with bases at different levels. | 70 – 80%. 7/10 – 8/10. 6 oktas | 600-1000 1968-3281 | 20.0 12.4 | 16.2 61 | ||||||||||||||||
13 | 26.0 79 | 694.5 27.34 925.92 925.92 | 758.9 29.88 1011.78 1011.78 | -2.1 -0.08 -2.8 -2.8 | 56 | Wind blowing from the north-east | Light breeze (2 m/s) (7 km/h) (4 mph) (4 knots) (2 Bft) | 70 – 80%. 7/10 – 8/10. 6 oktas | Cumulus humilis or Cumulus fractus other than of bad weather, or both. | 60%. 6/10. 5 oktas | 600-1000 1968-3281 | No Altocumulus, Altostratus or Nimbostratus. | Cirrus fibratus, sometimes uncinus, not progressively invading the sky. | 20.0 12.4 | 16.6 62 | ||||||||||||||
10 | 23.0 73 | 696.6 27.43 928.72 928.72 | 761.8 29.99 1015.65 1015.65 | 0.8 0.03 1.07 1.07 | 62 | Wind blowing from the east-northeast | Light breeze (2 m/s) (7 km/h) (4 mph) (4 knots) (2 Bft) | 70 – 80%. 7/10 – 8/10. 6 oktas | No Stratocumulus, Stratus, Cumulus or Cumulonimbus. | no clouds no clouds no clouds | 2500 or more, or no clouds. 8202 or more, or no clouds. | No Altocumulus, Altostratus or Nimbostratus. | Cirrus (often in bands) and Cirrostratus, or Cirrostratus alone, progressively invading the sky; they generally thicken as a whole; the continuous veil extends more than 45 degrees above the horizon, without the sky being totally covered. | 20.0 12.4 | 15.3 60 | ||||||||||||||
07 | 17.3 63 | 695.8 27.39 927.66 927.66 | 762.4 30.02 1016.45 1016.45 | 1.0 0.04 1.33 1.33 | 80 | Wind blowing from the east-northeast | Light air (1 m/s) (4 km/h) (2 mph) (2 knots) (1 Bft) | 70 – 80%. 7/10 – 8/10. 6 oktas | 16.6 62 | No Stratocumulus, Stratus, Cumulus or Cumulonimbus. | no clouds no clouds no clouds | 2500 or more, or no clouds. 8202 or more, or no clouds. | No Altocumulus, Altostratus or Nimbostratus. | Cirrus (often in bands) and Cirrostratus, or Cirrostratus alone, progressively invading the sky; they generally thicken as a whole; the continuous veil extends more than 45 degrees above the horizon, without the sky being totally covered. | 20.0 12.4 | 13.7 57 | |||||||||||||
04 | 17.2 63 | 694.8 27.35 926.32 926.32 | 761.0 29.96 1014.58 1014.58 | -0.9 -0.04 -1.2 -1.2 | 83 | Calm, no wind | Calm | 60%. 6/10. 5 oktas | No Stratocumulus, Stratus, Cumulus or Cumulonimbus. | no clouds no clouds no clouds | 2500 or more, or no clouds. 8202 or more, or no clouds. | No Altocumulus, Altostratus or Nimbostratus. | Cirrus (often in bands) and Cirrostratus, or Cirrostratus alone, progressively invading the sky; they generally thicken as a whole; the continuous veil extends more than 45 degrees above the horizon, without the sky being totally covered. | 20.0 12.4 | 14.2 58 | ||||||||||||||
01 | 17.6 64 | 695.7 27.39 927.52 927.52 | 762.3 30.01 1016.32 1016.32 | -0.9 -0.04 -1.2 -1.2 | 85 | Calm, no wind | Calm | 60%. 6/10. 5 oktas | Cumulus and Stratocumulus other than Stratocumulus cumulogenitus, with bases at different levels. | 60%. 6/10. 5 oktas | 600-1000 1968-3281 | No Altocumulus, Altostratus or Nimbostratus. | No Cirrus, Cirrocumulus or Cirrostratus. | 20.0 12.4 | 15.0 59 | ||||||||||||||
| December 17, Wednesday | 22 | 19.0 66 | 696.6 27.43 928.72 928.72 | 762.7 30.03 1016.85 1016.85 | 0.7 0.03 0.93 0.93 | 81 | Wind blowing from the north-east | Light air (1 m/s) (4 km/h) (2 mph) (2 knots) (1 Bft) | 40%. 4/10. 3 oktas | No Stratocumulus, Stratus, Cumulus or Cumulonimbus. | no clouds no clouds no clouds | 2500 or more, or no clouds. 8202 or more, or no clouds. | No Altocumulus, Altostratus or Nimbostratus. | Cirrostratus not progressively invading the sky and not entirely covering it. | 20.0 12.4 | 15.6 60 | |||||||||||||
19 | 19.7 67 | 695.9 27.4 927.79 927.79 | 762.1 30 1016.05 1016.05 | 1.3 0.05 1.73 1.73 | 77 | Wind blowing from the east-northeast | Light breeze (3 m/s) (11 km/h) (7 miles/hour) (6 knots) (2 Bft) | 70 – 80%. 7/10 – 8/10. 6 oktas | Clouds generally forming or developing. | Shower(s). | Cloud covering more than 1/2 of the sky throughout the appropriate period. | 28.3 83 | Cumulonimbus capillatus (often with an anvil), with or without Cumulonimbus calvus, Cumulus, Stratocumulus, Stratus or pannus. | 70 – 80%. 7/10 – 8/10. 6 oktas | 600-1000 1968-3281 | 20.0 12.4 | 15.6 60 | 0.3 0.01 | 24 | ||||||||||
