Since hail can cause the rainfall estimates to be higher than what is actually occurring, steps are taken to prevent these high dBZ values from being converted to rainfall. ![]() Hail is a good reflector of energy and will return very high dBZ values. These values are estimates of the rainfall per hour, updated each volume scan, with rainfall accumulated over time. Saturday we'll see peak conditions and some cooling is expected especially at the coast on. 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 warming trend continues Saturday with 70s and low 80s at coastal valleys and low 90s in the interior. 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. Weather Underground provides local & long-range weather forecasts, weatherreports. The value of the dBZ depends upon the mode the radar is in at the time the image was created. Notice the color on each scale remains the same in both operational modes, only the values change. 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. Check the latest weather conditions, get location-specific. ![]() 250 meter radar, the highest resolution available Future radar to see. You can also view current severe weather warnings & watches for Monterey on the KSBW alerts page. Weather Radar Worldwide Weather Weather Radar (Premium) Satellite IR Turbulence (Global) Turbulence (N. The dBZ values increase as the strength of the signal returned to the radar increases. Latest Local News Breaking News Microclimate Weather Sports Videos And more. 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). "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.
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