The unit of cloud amount – okta – is an eighth of the sky dome covered by cloud. The higher clouds are depicted as white and lower darker grey, so keep this in mind when looking at these charts. The C Function of Mask (CFMask) algorithm is used in Landsat Collection 1 Level-1 data processing. The sensors aboard each of the Landsat satellites were designed to acquire data in different ranges of frequencies along the electromagnetic spectrum ( View Bandpass Wavelengths for all Landsat Sensors ). However, you might get the impression that the cirrus is over-forecast . The tables below are a monthly average from 1973-2000* of hourly cloud cover between sunrise and sunset that show the average cloud cover (in oktas) and the mean number of days clear, partly cloudy, and cloudy. Warmest (lowest) clouds are shown in white; coldest (highest) clouds are displayed in shades of yellow, red, and purple. There are several Landsat data products that are useful for science applications and land use/land change studies: Landsat Collections Level 1 - Ensures that the data in the Landsat Level-1 archive are consistent in processing and data quality to support time-series analyses and data stacking. Everything you need to be ready to step out prepared. Data designated as Tier 1 provide the highest accuracy and can be reliably used to analyze changes to Earth’s surface over time. Missouri 7 Day Cloud Cover Forecast. Their color variations are probably due to differences in temperature and in the size of water droplets that make up the clouds. Feels like Feels like Precipitation mm Precip. Nearly no sunshine for over a week consecutively. U.S. Geological Survey, 2018, Landsat collections: U.S. Geological Survey Fact Sheet 2018–3049, 2 p., https://doi.org/10.3133/fs20183049. The vortices in this image were created when prevailing winds sweeping east across the northern Pacific Ocean encountered Alaska's Aleutian Islands. What are U.S. Landsat Analysis Ready Data (ARD)? A lenticular cloud over the Tararua Range mountains, New Zealand. U.S. Meteogram for Johannesburg, Gauteng (South Africa) Next 48 hours Example of a cloudless image of the western states in the U.S., composed using Landsat. download NASA cloud cover data and other Earth science resources. Showing the forecast for the rest of today and tomorrow, the more opaque the white of the cloud shown, the thicker the cloud cover in that area will be. Today, Jan. 20 close. These vortices appeared over Alexander Selkirk Island in the southern Pacific Ocean. These meteorological satellites, however, see more than clouds and cloud systems. The ASOS/AWOS systems, measure cloud cover in oktas (8th's) using a ceilometer which is accurate to 12,000 ft. Clouds factsheet (PDF, 3.75 MB) The cloud cover map below shows where cloudy conditions are expected across the UK. This coming Saturday should be a … United States 3 Hour Sky Cover - Cloud Cover Percentage Forecast Map Showing the Percent of US Sky Cover with Various Shades of Blue and Grey. What are the processing levels for Landsat Level-1 data? Cloud Coverage: Clear / Sunny: 0/8: Mostly Clear / Mostly Sunny: 1/8 to 2/8: Partly Cloudy / Partly Sunny: 3/8 to 4/8: Mostly Cloudy / Considerable Cloudiness: 5/8 to 7/8: Cloudy: 8/8: Fair (mainly for night) Less than 4/10 opaque clouds, no precipitation, no extremes of visibility/temperature/wind This percentage of the sky is the amount expected to be covered by opaque clouds, the type that do not allow other clouds, or blue sky to be visible through or above them. What's happening above those mountains? Note: Refresh the browser if data fail to load. The metadata for this Landsat 8 scene, acquired of Path 4 Row 53 on April 9, 2019, indicates an overall Scene CLOUD COVER score of 17.07 percent, and a LAND CLOUD COVER score of 18.06. Chicago had eight straight days Jan. 22-29 with an average cloud cover, from sunrise to sunset, of 100 percent. Earth’s cloudy nature is unmistakable in this global cloud fraction map, based on data collected by the Moderate Resolution Imaging Spectroradiometer (MODIS) on the Aqua satellite. The sky condition describes the predominant/average sky cover based on percent of the sky covered by opaque (not transparent) clouds. Today’s Snow-Cover Percent, Depth, & Liquid Equivalent (SWE) These stats include the total area and fraction/percent of the United States covered by snow, the average depth, and the range of depths across the nation. The number of filled boxes is how many oktas of cloud there are. 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