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. Weather Service forecast areas and offices involved in the February 1980 disasters in Southern California counties. 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. 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). Los Angeles, CA FC Cloudy 64 64 Feels Like CALM 0mph Wind 70 Humidity More Weather CBS News Los Angeles Watch Live 24/7 CBS News Los Angeles NEXT Weather Alissa Carlson's morning forecast. Some additional areas of flash flooding will be possible across portions of the High Plains. "Reflectivity" is the amount of transmitted power returned to the radar receiver. Strong to severe thunderstorms and some isolated to widely scattered instances of flash flooding are possible for the Mid-South and the lower Ohio and Tennessee Valleys. * WHEN.Through late Sunday night.The colors are the different echo intensities (reflectivity) measured in dBZ (decibels of Z) during each elevation scan. Track the rain with live doppler radar from ABC7. * WHERE.Matagorda Islands, Brazoria Islands, Galveston Island and Bolivar Peninsula Counties. Radar Loops, University of Southern California CA Doppler Radar Loops Weather - Weather WX doppler radar loops weather and radar loops for University of Southern California California. Watch live doppler radar and see when the rain and snow is coming to Los Angeles and across Southern California. NWS Forecast Office Los Angeles, CA > Los Angeles, CA Current Hazards Current Conditions Radar Forecasts Rivers and Lakes Climate and Past Weather Local Programs Click a location below for detailed forecast. HIGH RIP CURRENT RISK REMAINS IN EFFECT THROUGH LATE SUNDAY NIGHT. * WHERE.Coastal Aransas, Coastal San Patricio, Coastal Refugio, Coastal Calhoun, Kleberg Islands and Nueces Islands Counties. * WHAT.Heat index values from 110 to 114 expected. Meteorological off the coast of southern California, tended cooperative. HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM CDT THIS EVENING.HEAT ADVISORY IN EFFECT FROM NOON TO 8 PM CDT SATURDAY. , Weather Bureau Of- Goldenberg entered government fice. * WHAT.Dangerously hot conditions with heat index values from 116 to 124 expected. Covering Los Angeles, Orange County and all of the greater Southern California area. EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM CDT THIS EVENING.EXCESSIVE HEAT WARNING IN EFFECT FROM NOON TO 8 PM CDT SATURDAY. View our Mega Doppler Houston weather radar map for current weather conditions for Houston and the surrounding areas. Our Mega Doppler 7000 HD radar keeps you up-to-date with live weather conditions for the LA area. * IMPACTS.Hot temperatures and high humidity may cause heat More * WHERE.Chambers, Coastal Galveston, Galveston Island and Bolivar Peninsula Counties. HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM CDT SATURDAY. * WHEN.For the Heat Advisory, until 11 AM CDT this morning.
* WHERE.Portions of south central and southeast Texas. * WHAT.Dangerously hot conditions with heat index values up to 115 expected. EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM CDT SATURDAY.
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