Hail is a good reflector of energy and will return very high dBZ values. Alabama Original Alabama Politics This Week Alabama The Beautiful Big Game Friday Night Connecting North Alabama Deals and Steals Dream Home Cooking Lawcall Medcall Skilled To Work. These values are estimates of the rainfall per hour, updated each volume scan, with rainfall accumulated over time. Depending on the type of weather occurring and the area of the U.S., forecasters use a set of rainrates which are associated to the dBZ values. The higher the dBZ, the stronger the rainrate. Typically, light rain is occurring when the dBZ value reaches 20. The scale of dBZ values is also related to the intensity of rainfall. The value of the dBZ depends upon the mode the radar is in at the time the image was created. It was originally deployed in Huntsville by the. Notice the color on each scale remains the same in both operational modes, only the values change. ARMOR is a scanning dual-polarimetric Doppler radar operating at C-band (5625 MHz) with a beam width of 1o. The other scale (near left) represents dBZ values when the radar is in precipitation mode (dBZ values from 5 to 75). One scale (far left) represents dBZ values when the radar is in clear air mode (dBZ values from -28 to +28). Each reflectivity image you see includes one of two color scales. The dBZ values increase as the strength of the signal returned to the radar increases. So, a more convenient number for calculations and comparison, a decibel (or logarithmic) scale (dBZ), is used. Reflectivity (designated by the letter Z) covers a wide range of signals (from very weak to very strong). 3 Today Hourly 10 Day Radar Video Huntsville, AL Radar Map Rain Frz Rain Mix Snow Huntsville, AL Expect dry conditions for the next 6 hours. "Reflectivity" is the amount of transmitted power returned to the radar receiver. The colors are the different echo intensities (reflectivity) measured in dBZ (decibels of Z) during each elevation scan. WHNT News 19 is North Alabamas News Leader & The Weather Authority covering North Alabama from Sand Mountain to the Shoals and Lincoln County, Tenn.
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