National weather radar

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Federal government websites often end in. The site is secure. We apologize for any inconvenience. Air Force. The NEXRAD system detects precipitation and wind, and its data can be processed to map precipitation patterns and movement. Digital data is available for free, and paper copies can be purchased and certified. See Data Certification for more information on hard copy radar products, pricing, and certification information.

National weather radar

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Storm Total precipitation accumulation is available on a.

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Short range forecast products depicting pressure patterns, circulation centers and fronts, and types and extent of precipitation. Day 1 Day 2 Day 3. Highs, lows, fronts, troughs, outflow boundaries, squall lines, drylines for much of North America, the Western Atlantic and Eastern Pacific oceans, and the Gulf of Mexico. Standard Size High Resolution. Expected weather precipitating or non-precipitating valid at the indicated hour. The weather element includes type, probability, and intensity information. Sustained wind speed in knots and expected wind direction using 36 points of a compass forecasts. Please Contact Us. Customize Your Weather.

National weather radar

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Melting Layer is a computer algorithm output that determines the atmospheric melting point for frozen precipitation. Departments of Commerce, Defense, and Transportation. Products from elevation angles at or below 3. These systems are modified and enhanced during their operational life to meet changing requirements, technology advances, and improved understanding of the application of these systems to real-time weather operations. The product is volume-based and is updated every volume scan. This product is generated for each elevation angle that the radar scans and can be particularly useful for tracking icing conditions above the surface. It is an effective hail indicator that can be used to locate most significant storms and identify areas of heavy rainfall. Doppler Radar National Loop. This product displays information regarding the existence and nature of rotations associated with thunderstorms. Customize Your Weather. The Sachidananda-Zrnic Algorithm reduces range ambiguity for Doppler data. Emergency Managers. Rivers and Lakes. Comparing the storm relative motion image with base velocity image helps identify the rotating storm. The VCP 11 has 14 elevation angles and completes 16 azimuthal scans in five minutes, while VCP 21 has nine elevation angles and completes 11 azimuthal scans in six minutes.

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This product is generated every volume scan whether or not precipitation has been detected. Climate and Past Weather. More Information. Multiple locations were found. Color indices are the same as base velocity. A product that shows a plot of the past hours movement, current location, and forecast movement for the next hour or less for each identified thunderstorm cell. The Quantitative Precipitation Estimate QPE dual-polarization precipitation algorithm is used and 16 possible data levels are available. Radar and Satellite. Values near zero indicate the targets are generally spherical. Other scan strategies are currently under development for the future. A three-part message containing a tabular listing of composite reflectivity data, a vertical wind profile derived from the VAD algorithm, and the locations of algorithm-produced severe weather features such as the Hail Index HI and the Tornado Vortex Signature TVS. Departments of Commerce, Defense, and Transportation. The online store provides access documentation, paper copies of data, and other related products.