![]() ![]() These scans are interpreted by a computer and translated into an image. A complete set of scans takes around 5 minutes to complete. Doppler radars scan the horizon in 360˚ degrees in a set pattern of angles from very low (along the horizon) to very high (almost straight up). This process of emitting a signal, listening for any returned signal, then emitting the next signal, takes place very fast, up to around 1300 times each second. Computers analyze the strength of the returned pulse, the time it took to travel to the object and back, and the phase shift of the pulse. The radar instrument receives a signal from this reflected energy during its listening period. A small fraction of the scattered energy is directed back toward the radar. ![]() If the energy strikes an object (raindrop, snowflake, bug, bird, etc), the energy is scattered in all directions. The radar emits a burst, or pulse, of energy. Bright reflectivity returns that are stationary and appear during both calm and inclement weather are usually land-based obstructions such as mountains, trees, or especially wind farms (nothing gets electromagnetic signals confused like spinning metal blades!).NEXRAD (Next Generation Radar) stations obtain weather information (precipitation and wind) based upon returned energy. See the latest Oklahoma Doppler radar weather map including areas of rain, snow and ice.This is helpful for picking out snow/mix/rain transition zones In all snow situations, dBZ values of 40 indicate 3-4”/hr snowfall rates and whiteout conditions. This map features satellite-radar composite imagery, current temperatures, projected storm tracks and wind speeds. Anything larger than this is usually due to “bright banding” where the radar is seeing the part of the atmosphere where snowflakes are clumping together and melting into raindrops. In cold climates during the winter months, actual dBZ values rarely exceed 40.Check the latest weather conditions, get location-specific. This is your standard radar data that shows precip or other solid/liquid particles in the atmosphere. You can also view current severe weather warnings & watches for Greenville on the WYFF 4 alerts page. ![]() The first type of data currently available is reflectivity. We currently have two types of radar data available with plans to add more soon. Use radar data with caution especially if your area of interest is far from the nearest radar location! A lot can happen between 0 and 5,000 feet and therefore the depiction of precipitation given by radar may differ some from what’s actually happening on the ground. Because of this phenomenon, the radar beam will only see precipitation falling through the mid levels of the atmosphere. To see this in action, imagine a circle (earth) with a straight line emanating from some point on the circle if you continue this line out into space, it will gradually get farther and farther from the circle. 1 day ago &0183 &32 Hexworks has released a brand new trailer for its upcoming dark fantasy RPG Lords of the Fallen. Because the earth is round and the radar beam is flat, the farther away from the radar tower the beam (energy) travels, the farther removed from the ground becomes. There is a notable constraint to radar data though. This is the highest resolution radar data available which enables you to see features such as sea breeze or outflow boundaries that standard resolution radar entirely misses. See the latest Wisconsin Doppler radar weather map including areas of rain, snow and ice. This data is gathered from over a hundred radar towers located across the US.
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