These scans are interpreted by a computer and translated into an image. A complete set of scans takes around 5 minutes to complete. Doppler radars scan the horizon in 360˚ degrees in a set pattern of angles from very low (along the horizon) to very high (almost straight up). You can find the current and future conditions for any location, as well as the precipitation. This view combines radar station products into a single layer called a mosaic and storm based alerts. This process of emitting a signal, listening for any returned signal, then emitting the next signal, takes place very fast, up to around 1300 times each second. offers you the most accurate and up-to-date weather forecast maps for the entire US. Computers analyze the strength of the returned pulse, the time it took to travel to the object and back, and the phase shift of the pulse. The radar instrument receives a signal from this reflected energy during its listening period. A small fraction of the scattered energy is directed back toward the radar. ![]() If the energy strikes an object (raindrop, snowflake, bug, bird, etc), the energy is scattered in all directions. The radar emits a burst, or pulse, of energy. Not sure where to begin? Click to see all topics in JetStream in the Topic Matrix.NEXRAD (Next Generation Radar) stations obtain weather information (precipitation and wind) based upon returned energy. View rain radar and maps of forecast precipitation, wind speed, temperature and more. Your input will greatly assist others in teaching the "hows" and "whys" of weather. Weather forecasts and LIVE satellite images of the United States of America. We welcome your feedback on this project. See the latest Mississippi Doppler radar weather map including areas of rain, snow and ice. You are free to use the materials in any manner you wish. This view is similar to a radar application on a phone that provides radar, current weather, alerts and the forecast for a location. Interspersed in JetStream are "Learning Lessons" which can be used to enhance the educational experience. This view combines radar station products into a single layer called a mosaic and storm based alerts. The information contained in JetStream is arranged by subject, beginning with global and large-scale weather patterns followed by lessons on air masses, wind patterns, cloud formations, thunderstorms, lightning, hail, damaging winds, tornados, tropical storms, cyclones, and flooding. Credit: Jeff Schmaltz, Moderate Resolution Imaging Spectroradiometer (MODIS) Land Rapid Response Team, National Aeronautics and Space Administration (NASA), Goddard Space Flight Center (GSFC). ![]() High resolution version of this NASA image: select link to enlarge image (~2 mb). As the winds are diverted around the high areas, turbulence is created, and the disturbance in the flow continues downstream in the form of rows of vortices that alternate their direction of rotation. Next 48 hours rain and snow, across the US measured in inches. Click HERE for the latest radar status message from NWS Green Bay. In this case, driving wind rushes past the tall peaks on the rugged Canary Islands. You can find the forecast for the days ahead in the weather details tab below. Be sure to 'Reload/Refresh' to ensure you are looking at the most recent image. ![]() National Centers for Environmental Prediction.Preparedness and Mitigation: Individuals (You!).Preparedness and Mitigation: Communities.The Positive and Negative Side of Lightning.
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