Near blizzard conditions in the afternoon and early evening. Winds gusting as high as 35 to 40 mph with blowing and drifting snow. Total snow accumulations of 6 to 10 inches, highest amounts near the lake. WINTER STORM WARNING IN EFFECT FROM 9 AM TO 9 PM CST THURSDAY. * WHERE.Washington, Jefferson, Waukesha and Walworth Counties. Total snow accumulations of 4 to 8 inches. To view todays weather forecast by the hour, please reference the table below. The weather forecast for today is Partly Cloudy. It is currently 92 degrees in Cape Coral, on Wednesday, August 31st. Chicago's source for breaking news and live streaming video online. WINTER STORM WARNING IN EFFECT FROM 9 AM TO 7 PM CST THURSDAY. Our Cape Weather doppler radar and forecast will help you stay up to date with your areas local weather conditions. View our Doppler 7 Max Indiana weather radar map for current weather conditions for Chicago, Indiana and the surrounding areas. Total snow and sleet accumulations of 1 to 3 inches and ice accumulations of a light glaze. WINTER WEATHER ADVISORY IN EFFECT FROM 6 AM TO 9 PM CST THURSDAY. * WHERE.DuPage and Northern Cook Counties. Total snow and sleet accumulations of 2 to 4 inches and ice accumulations of a light glaze. WINTER WEATHER ADVISORY NOW IN EFFECT FROM 6 AM TO 9 PM CST THURSDAY. * WHERE.Lee, De Kalb, Kane, La Salle and Kendall Counties. Total snow and sleet accumulations of 1 to 4 inches and ice accumulations of a light glaze. WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 3 AM TO 9 PM CST THURSDAY. Total snow accumulations of 4 to 7 inches and ice accumulations of a light glaze. * WHAT.Heavy mixed precipitation expected. WINTER STORM WARNING IN EFFECT FROM 6 AM TO 9 PM CST THURSDAY. * WHERE.Winnebago, Boone, McHenry and Ogle Counties. Full Screen Motion Weather Radar () WunderMap with. Total snow accumulations of 4 to 7 inches. Archives for Chicagos hourly weather data were updated 24-48 hours after end of. 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.WINTER STORM WARNING IN EFFECT FROM 3 AM TO 9 PM CST THURSDAY. 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. 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. NewsBreak provides latest and breaking Sullivan County, NY local news, weather forecast, crime and safety reports. 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). The rate at which the object’s motion alters this returning radio signal’s frequency can be analyzed to figure. It achieves this by sending out a radio signal that returns to the radar after bouncing off the target object. "Reflectivity" is the amount of transmitted power returned to the radar receiver. Generally, a Doppler radar is used to determine the velocity of an object in motion. The colors are the different echo intensities (reflectivity) measured in dBZ (decibels of Z) during each elevation scan.
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