Périgueux

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Limited 3 Days Seeing Prediction

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meteoblue.com forecastPerigueux (0.72°E / 45.18°N)     last update: 28.05  08:47 UTC
Mon 28.05.2012              06:18       21:30    meteoblue.com
Time (CEST)000102030405060708091011121314151617181920212223
High Clouds (%) 0 16 0 78 100 100 100 100 100 35 51 85 100 100 100 100 99 95 99 99 100 100
Mid Clouds (%) 0 0 0 6 100 100 100 100 74 19 38 46 47 26 11 16 23 22 41 50 44 10
Low Clouds (%) 0 0 0 0 0 0 0 0 0 30 30 25 24 22 22 30 24 24 0 0 0 0
Seeing Index 1 5 5 5 4 4 4 4 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
Seeing Index 2 4 4 4 3 3 3 3 4 4 5 5 5 5 5 5 5 5 5 5 5 4 4
Seeing arcSeconds 1.60 1.63 1.67 1.73 1.81 1.84 1.83 1.81 1.77 1.77 1.77 1.74 1.59 1.55 1.53 1.56 1.54 1.50 1.50 1.50 1.49 1.48
Jet stream (m/s) 11 11 10 9 8 7 5 4 3 2 2 3 4 4 4 5 5 4 4 4 4 4
2m Rel. Hum. (%) 94 96 98 99 99 98 93 85 80 75 69 61 59 56 57 59 59 61 64 74 84 91
Bad Layers Top (km) 3.1 3.1 3.1 3.7 3.7 3.7 3.7 3.7 3.7 3.1 3.1 3.1 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7
Bad Layers Bot (km) 2.6 2.6 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.6 2.6 2.6 2.6 3.1 3.1 3.1 3.1 3.1 3.1 3.1 2.6 2.6
Bad Layers K/100m 0.55 0.56 0.57 0.55 0.58 0.60 0.60 0.59 0.58 0.66 0.68 0.66 0.53 0.59 0.59 0.61 0.59 0.56 0.56 0.53 0.51 0.50
Tue 29.05.2012              06:18       21:30    meteoblue.com
Time (CEST)000102030405060708091011121314151617181920212223
High Clouds (%) 99 80 3 37 67 38 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1
Mid Clouds (%) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Low Clouds (%) 0 0 0 0 0 0 0 0 0 0 0 0 0 10 23 26 30 23 22 6 0 13 6 0
Seeing Index 1 5 4 4 4 4 5 5 4 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
Seeing Index 2 3 3 3 3 3 5 4 3 4 4 5 5 5 5 5 5 5 5 5 5 5 5 5 5
Seeing arcSeconds 1.49 1.53 1.56 1.58 1.61 1.63 1.61 1.56 1.56 1.53 1.46 1.41 1.42 1.45 1.47 1.46 1.44 1.42 1.38 1.36 1.35 1.34 1.37 1.40
Jet stream (m/s) 3 4 3 4 4 4 5 5 6 7 7 7 8 8 9 10 12 15 16 16 16 15 14 14
2m Rel. Hum. (%) 97 99 99 100 99 79 80 99 76 75 77 70 64 60 58 59 59 57 55 54 55 60 58 56
Bad Layers Top (km) 3.7 3.7 3.7 3.7 3.7 3.1 3.1 3.1 3.1 3.1 3.1 3.1 3.1 3.1 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7
Bad Layers Bot (km) 2.6 2.6 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.6 3.1 3.1 3.1 3.1 3.1 3.1 3.1 3.1 3.1 3.1
Bad Layers K/100m 0.50 0.52 0.53 0.53 0.54 0.60 0.60 0.57 0.57 0.57 0.54 0.52 0.52 0.52 0.50 0.57 0.57 0.56 0.53 0.50 0.51 0.52 0.53 0.54
Wed 30.05.2012              06:17       21:31    meteoblue.com
Time (CEST)000102030405060708091011121314151617181920212223
High Clouds (%) 9 0 17 0 0 0 0 0 0 0 0 0 0 100 100 100 100 99 51 56 0 0 0 0
Mid Clouds (%) 0 27 65 7 0 0 0 0 0 0 0 0 0 0 100 100 99 100 100 100 100 100 0 0
Low Clouds (%) 0 0 0 0 0 0 0 0 0 0 0 0 26 30 30 27 58 40 25 0 0 0 0 0
Seeing Index 1 5 5 4 4 4 4 4 4 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
Seeing Index 2 5 3 3 3 3 2 2 3 3 4 5 5 5 5 5 5 5 5 5 5 5 5 5 5
Seeing arcSeconds 1.40 1.38 1.38 1.36 1.35 1.38 1.41 1.48 1.54 1.59 1.59 1.58 1.58 1.42 1.39 1.36 1.37 1.17 1.28 1.27 1.28 1.29 1.28 1.27
Jet stream (m/s) 14 14 14 14 14 14 14 15 16 16 16 17 17 18 19 20 21 22 22 23 23 22 22 22
2m Rel. Hum. (%) 62 100 99 99 100 99 100 100 97 84 77 72 67 61 60 60 61 71 61 61 63 70 74 82
Bad Layers Top (km) 3.7 3.7 3.7 3.7 3.7 10.6 10.6 3.7 3.1 3.1 3.1 3.1 3.1 3.7 3.7 3.7 3.7 no 3.7 3.7 3.7 3.7 3.7 3.7
Bad Layers Bot (km) 3.1 3.1 3.1 3.1 3.1 9.4 9.4 3.1 2.6 2.6 2.6 2.6 2.6 3.1 3.1 3.1 3.1 no 3.1 3.1 3.1 3.1 3.1 3.1
Bad Layers K/100m 0.54 0.54 0.52 0.53 0.52 0.51 0.50 0.52 0.55 0.60 0.62 0.60 0.60 0.52 0.56 0.56 0.58 no 0.50 0.52 0.51 0.53 0.51 0.52


Values may not reflect precisely reality.(Ver. 2.3, 14.6.2009)
  • For good seeing conditions look for dark blue colors in the cloud cover and green values in the Seeing Indices and Jet Stream
  • The estimated seeing indexes (1 & 2) range from 1 (poor) to 5 (excellent) seeing conditions. This value is computed based on the integration of turbulent layers in the atmosphere.
  • NEW! Estimation of seeing in arcseconds. This is a test prediction under development, uncalibrated for the time being.
  • Cloud cover ranges from dark blue (0% cover) to white (100% cover). Fog or very low cloud is not shown here (see pictocast for fog)
  • High jetstream speeds (>35m/s) usually correspond to bad seeing, as well as very low speeds (<5m/s). Color gives a hint.
  • Bad Layers have a Temperature Gradient > 0.5K/100m. The actual gradient is shown K/100m. The top and bottom height of the Bad layers is indicated by Bad Layers bot/top