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  2. Okta - Wikipedia

    en.wikipedia.org/wiki/Okta

    The symbols for cloud cover on these maps, like the modern symbols, were drawn inside the circle marking the position of the weather station making the measurements. Unlike the modern symbols, these ones consisted of straight lines only rather than filled in blocks which would have been less practical on a hand drawing.

  3. Storm clouds make great pictures, but what do they mean - AOL

    www.aol.com/storm-clouds-great-pictures-mean...

    What different clouds mean. Clouds are more than just picturesque features of the sky; they are critical indicators of the weather to come. Understanding the various types of clouds can provide ...

  4. Cloud cover - Wikipedia

    en.wikipedia.org/wiki/Cloud_cover

    Although clouds can exist within a wide range of altitudes, typical cloud cover has a base at approximately 4,000m and extends up to an altitude of about 5,000m. [9] Clouds height can vary depending on latitude; with cloud cover in polar latitudes being slightly lower and in tropical regions the cloud cover may extend up to 8,000m.

  5. Station model - Wikipedia

    en.wikipedia.org/wiki/Station_model

    The present weather symbol depicts the current weather which normally is obstructing the visibility at the time of observation. The visibility itself is shown as a number, in statute miles in the United States and meters elsewhere, describing how far the observer can see at that time. This number is located to the left of the present weather ...

  6. Cirrus cloud - Wikipedia

    en.wikipedia.org/wiki/Cirrus_cloud

    High cloud weather map symbols. Random, isolated cirrus do not have any particular significance. [20] A large number of cirrus clouds can be a sign of an approaching frontal system or upper air disturbance. The appearance of cirrus signals a change in weather—usually more stormy—in the near future. [38]

  7. Surface weather analysis - Wikipedia

    en.wikipedia.org/wiki/Surface_weather_analysis

    The weather associated with an occluded front includes a variety of cloud and precipitation patterns, including dry slots and banded precipitation. Cold, warm and occluded fronts often meet at the point of occlusion or triple point. [28] A guide to the symbols for weather fronts that may be found on a weather map: 1. cold front 2. warm front

  8. Mackerel sky - Wikipedia

    en.wikipedia.org/wiki/Mackerel_sky

    Cirrocumulus appears almost exclusively with cirrus some way ahead of a warm front and is a reliable forecaster that the weather is about to change. [4] When these high clouds progressively invade the sky and the barometric pressure begins to fall, precipitation associated with the disturbance is likely about 6 to 12 hours away.

  9. AOL Mail

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    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!