Search results
Results from the WOW.Com Content Network
Weather radar in Norman, Oklahoma with rainshaft Weather (WF44) radar dish University of Oklahoma OU-PRIME C-band, polarimetric, weather radar during construction. Weather radar, also called weather surveillance radar (WSR) and Doppler weather radar, is a type of radar used to locate precipitation, calculate its motion, and estimate its type (rain, snow, hail etc.).
Polarimetric radar boosts precipitation observation and prediction, especially rainfall rates, hail detection, and distinguishing precipitation types. [14] Proposed radar technologies, such as phased array and CASA, would further improve observations and forecasts by increasing the temporal and spatial resolution of scans in the former [15] as ...
The scale of dBZ values can be seen along the bottom of the image. Decibel relative to Z, or dBZ, is a logarithmic dimensionless technical unit used in radar. It is mostly used in weather radar, to compare the equivalent reflectivity factor (Z) of a remote object (in mm 6 per m 3) to the return of a droplet of rain with a diameter of 1 mm (1 mm 6 per m 3). [1]
Around 11 a.m., the NWS reported that the doppler radar indicated heavy rain continuing to move into the area from the southwest. Between 3 and 5 inches of rain have fallen. Additional rainfall ...
Scans at different angles by a weather radar. A weather radar sequentially surveys a series of vertical angles over 360 degrees in azimuth. The reflectivity at each of these angles represents the rate of precipitation along a cone that rises away from the radar. Every angle can be seen on a PPI image. However, this rate varies with altitude and ...
The generic term, Winter Weather Advisory (which replaced the previously used "Travelers Advisory"), is used for hazardous winter precipitation in the form of snow, freezing rain or freezing drizzle, sleet or blowing snow, or a combination of two or more precipitation types. The forecast accumulation criteria—defined below locally designated ...
A hook echo is a pendant or hook-shaped weather radar signature as part of some supercell thunderstorms. It is found in the lower portions of a storm as air and precipitation flow into a mesocyclone, resulting in a curved feature of reflectivity. The echo is produced by rain, hail, or debris being wrapped around the supercell. [1]
The quantitative precipitation forecast (abbreviated QPF) is the expected amount of melted precipitation accumulated over a specified time period over a specified area. [1] A QPF will be created when precipitation amounts reaching a minimum threshold are expected during the forecast's valid period.