Large positive values indicate that targets are generally much larger horizontally than vertically. BDZD (N0X) (Dual-Pol Differential Reflectivity)ĭifferential Reflectivity values are measurements related to the returned energy difference between the vertical and horizontal radar pulses.The product displays the predefined categories that were most likely the cause of the radar echo at that location.īI: Biological GC: Clutter IC: Ice Crystals DS: Dry Snow WS: Wet Snow RA: Rain HR: Heavy Rain BD: Big Drops GR: Graupel HA: Hail-Rain UK: Unknown Hydrometeor Classification is a computer algorithm output that determines the most likely classification of the targets in the radar volume. BDHC (N0H) (Dual-Pol Precipitation Type).Scientists use these products to estimate wind speed and direction, locate boundaries, locate severe weather signatures, and identify suspected areas of turbulence. Cool colors (green) represent negative values and warm colors (red) represent positive values. BVEL.RAW (Super Resolution Base Velocity)Ī measure of the radial component of the wind either toward the radar (negative values) or away from the radar (positive values).Data values are actual reflectivity values. Scientists use these products to detect precipitation, evaluate storm structure, locate boundaries, and determine hail potential. BREF.RAW (Super Resolution Base Reflectivity)Ī display of echo intensity measured in dBZ.Scientists use this product for a quick estimation of the most intense convection and higher echo tops, as an aid in identification of storm structure features, and for pilot briefing purposes. TC: Tropical Convective TS: Tropical Stratiform CS: Cool Stratiform H: Hail C: Convective S: Snow WS: Warm StratiformĪn image of the echo top heights color-coded in user-defined increments. The primary use of the SPT is for automatic selection of Z-R relationships and for computing Surface Precipitation Rates (SPRs) from the Seamless Hybrid Scan Reflectivity (SHSR) mosaic. With ground clutter / non-precipitation echoes removed.Īlgorithm which classifies radar echoes into one of seven categories: 1) warm stratiform rain, 2) cool stratiform rain, 3) convective rain, 4) tropical/stratiform rain mix, 5) tropical/convective rain mix, 6) hail, and 7) snow. These products reveal the highest reflectivities in all echoes, examine storm structure features, and determine the intensity of storms. These products reveal the highest reflectivities in all echoes, examine storm structure features, and determine the intensity of storms.Ĭomposite Reflectivity is a display of maximum reflectivity for the total volume within the range of the radar. Data values are actual reflectivity values (uses the 0.5 degree elevation cut).Ĭomposite Reflectivity is a display of maximum reflectivity for the total volume within the range of the radar. Data values are actual reflectivity values (uses the 0.5 degree elevation).Ī display of echo intensity measured in dBZ (with ground clutter / non-precipitation echoes removed). Scientists use these products to detect precipitation, evaluate storm structure, locate boundaries, and determine hail potential. You can select to display all warnings on these views by using the view options (three vertical dots).įor national mosaics (Conus, Alaska, Hawaii, Guam and Puerto Rico):Ī display of echo intensity measured in dBZ. Storm-based warnings display by default on the "National radar mosaic" and "Radar station products" views. See changes in downloads for more information. Topo, counties, rivers, highways, cities.Select the map options and then choose "Reset Map." Map legend for the selected radar product(s).Map time for the selected radar product(s).
Common help for the National Weather Service sites.Application menu customized for the radar site.How can I get standard radar/animated GIF's (for low bandwidth users)?.How do I consume OGC compliant service in my own application?.
Our GIS-based webpage allows users to integrate our radar data into their own platforms. On the new page, we provide more radar products and radar images are updated more frequently and at four times higher resolution than before. We redesigned our radar viewer to improve our services to the public. Welcome to FAQs about the National Weather Service’s new radar webpage located at and launched on December 17, 2020.
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