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    Washington

    Region/District: District of Columbia
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    Limited Seeing Prediction Until Midnight

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    meteoblue.com forecast Washington (77.04°W / 38.90°N)     last update: 14.03  16:44 UTC
    Sun 14.03.2010               07:24       19:10    meteoblue.com
    Time (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
    High Clouds (%) 98 68 46 33 29 34 42 51 59 63 63 59 55 53 52 52
    Mid Clouds (%) 99 77 61 52 50 53 58 61 64 65 66 64 60 51 42 35
    Low Clouds (%) 99 99 99 100 100 100 99 96 94 92 91 92 93 95 96 98
    Seeing Index 1 2 2 2 2 2 2 2 3 3 3 3 3 3 3 3 3
    Seeing Index 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
    Seeing arcSeconds 1.53 1.52 1.52 1.53 1.55 1.57 1.56 1.49 1.42 1.36 1.33 1.35 1.38 1.42 1.47 1.53
    Jet stream (m/s) 4 4 5 5 5 4 4 4 3 3 2 2 2 3 4 5
    2m Rel. Hum. (%) 0 43 75 95 101 99 94 91 90 91 92 92 93 93 93 93
    Bad Layers Top (km) 10.1 10.1 10.1 10.1 10.1 10.1 10.1 10.1 10.1 10.1 10.1 10.1 10.1 10.1 10.1 10.1
    Bad Layers Bot (km) 7.9 7.9 7.9 7.9 7.9 7.9 7.9 7.9 7.9 7.9 7.9 7.9 7.9 7.9 7.9 7.9
    Bad Layers K/100m 1.54 1.56 1.56 1.54 1.51 1.47 1.43 1.39 1.36 1.34 1.31 1.29 1.26 1.24 1.22 1.20


    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