Land Use data comes from the Global Land Cover SHARE database, published by the Food and Agriculture Organization of the United Nations.Įlevation data comes from the Shuttle Radar Topography Mission (SRTM), published by NASA's Jet Propulsion Laboratory. This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid. Please note that each source's contribution is adjusted for elevation and the relative change present in the MERRA-2 data.Īll data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Algorithms 2nd Edition, by Jean Meeus.Īll other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis. To get a sense of how much these sources agree with each other, you can view a comparison of Atlanta and the stations that contribute to our estimates of its temperature history and climate. Dekalb-Peachtree Airport (KPDK, 29%, 10 mi, northeast, -43 ft elevation change).Hartsfield-Jackson Atlanta International Airport (KATL, 35%, 9 mi, south, -36 ft elevation change).Fulton County Airport-Brown Field (KFTY, 35%, 8 mi, west, -203 ft elevation change).The stations contributing to this reconstruction are: The estimated value at Atlanta is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Atlanta and a given station. There are 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Atlanta.įor each station, the records are corrected for the elevation difference between that station and Atlanta according to the International Standard Atmosphere, and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations. The map tool includes selection tools that allow users to choose individual or multiple sites and begin the ordering process for historical data in NCEI's Radar Data Archive.This report illustrates the typical weather in Atlanta, based on a statistical analysis of historical hourly weather reports and model reconstructions from Januto December 31, 2016. Please visit the NOAA's Radar Operations Center for more information. The Interactive Radar Map Tool shows map layers at the maximum distance (230 km), as well as maps derived from geospatial models that provide views of areas blocked by mountains. However, mountains can block the lower sweeps of the radar beam. The typical range of most radar products is 230 km from the radar site. The map tool includes layers at 4,000 feet (best coverage), 6,000 feet (better coverage), and 10,000 feet (fair coverage). The analysis conducted by NOAA's Radar Operations Center shows the availability of beam coverage at specified altitudes from the ground.
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