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. 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. Notice the color on each scale remains the same in both operational modes, only the values change. Thanks for signing up Watch for us in your inbox. The other scale (near left) represents dBZ values when the radar is in precipitation mode (dBZ values from 5 to 75). Maps & Radar Iowa’s Weather Channel WHO 13 Skycam Network Warnings Weather Related Closings Road Conditions & Emergency Hotlines Iowa River Gages. 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. Current and future radar maps for assessing areas of precipitation, type, and intensity. 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. An interactive radar that lets you zoom in and out to street level and watch storms as they approach.The colors are the different echo intensities (reflectivity) measured in dBZ (decibels of Z) during each elevation scan. Up to date, current local weather conditions, hourly Des Moines weather updates, and 7 day forecasts Share stories via email or your social media pages Check out current Des Moines weather conditions, hourly and 7 day forecasts wherever you might be. Submit breaking news, news tips or email your news photos and videos right to our newsroom and it could be featured on air. Local news submission area for breaking news, news tips and the ability to email your news photos and videos right to our newsroom to be featured on air Watch live streaming breaking news when it happens and get live updates from our reporters. Live streaming breaking news updates from our KCCI 8 News reporters when it happens, where it happens For three days in a row, temperatures have reached the low 90s and record levels for this time of the year. Des Moines breaking news alerts with push notifications DES MOINES, Iowa What a stretch of weather we have had heading into the month of October. Area, Including Zoom In and Out, Pausing, Speed Toggles, and more. Sign up for daily weather forecast or severe weather alert email for your location. KDMX Des Moines, Iowa Based Nexrad Doppler Radar Station with Enhanced Nexrad Doppler Radar from the National Weather Service for the General Des, Moines IA. Our Local News, Weather and Sports App Features Include: Local Radar for Central Iowa, Des Moines, Ames and more from KCCI 8 News. Download the KCCI 8 News app for free today. Storms will move into the SW portion of the state. Always stay up to date with the latest local news, national, sports, traffic, political, entertainment stories and much more. Portions of Nebraska have been upgraded to a 'moderate' risk for severe weather, while parts of Iowa have been increased to an 'Enhanced' risk. Take the KCCI 8 News app with you everywhere you go and be the first to know of breaking news happening in Des Moines and the surrounding area.
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