Digital Precipitation Array (DPA/81)Īn array format of estimated one-hour precipitation accumulations on the 1/4 Lyon-Fedder-Mobarry (LFM) or 4.7625 km Hydrographic Rainfall Analysis Project (HRAP) grid. Scientists use this product to locate flood potential over urban or rural areas, estimate total basin runoff, and provide rainfall data 24 hours a day. Accumulation is tracked on a 1.1 nm x 1 degree grid. This product uses the PPS algorithm to create a continuously updated estimate of a storm’s accumulated precipitation. This product is used to assess rainfall intensities for flash flood warnings, urban flood statements, and special weather statements. One-Hour Precipitation (N1P/78)Ī display of estimated one hour precipitation accumulation on a 1.1-nm x 1-degree grid using the Precipitation Processing System (PPS) algorithm. Estimates are based on a reflectivity and rainfall rate relationship called Z-R.

Precipitation products are estimated ground accumulated rainfall. This product is an excellent tool for meteorologists in weather forecasting, severe weather, and aviation. The current (far right) and up to 10 previous plots may be displayed simultaneously. VAD Wind Profile (NVW/48)Ī graphic display of wind barbs plotted on a height staff in 1,000-ft increments. Scientists use this product to quickly estimate the most intense convection and higher echo tops, as an aid to identify storm structure features, and for pilot briefing purposes. This product generates a color coded image that shows the height of an echo top. This product is used as an effective hail indicator, to locate most significant storms, and to identify areas of heavy rainfall. The water content of a 2.2 x 2.2 nm column of air, which is color-coded and plotted on a 48-nm map. This product is used to reveal the highest reflectivities in all echoes, examine storm structure features, and determine intensity of storms. Composite Reflectivity (NCR/37)Ī display of maximum reflectivity for the total volume within the range of the radar. When the FAA updated TDWR between January 2017 and May 2019, the elevation angle of this product became the same as the lowest elevation Reflectivity product (TR0 or TZ0). Long Range Digital Base Reflectivity (TZL/186)ĭigital Reflectivity data are measured at an elevation angle of 0.6 degrees with a maximum range of 225 nm. Data for the three lowest elevation angles are available, with a maximum range of 48 nm.

These products are used to estimate wind speed and direction, locate boundaries, locate severe weather signatures, and identify suspected areas of turbulence. Cool colors (green) represent negative values and warm colors (red) represent positive values. Digital Base Velocity (TV0, TV1, TV2/182)Ī measure of the radial component of the wind either toward (negative values) or away from (positive values) the radar. The three lowest elevation angles are available with a maximum range of 48 nautical miles (nm). These products are used to detect precipitation, evaluate storm structure, locate boundaries, and determine hail potential. Digital Base Reflectivity (TR0, TR1, TR2/181 or after TZ0, TZ1, TZ2/180)Ī display of echo intensity measured in dBZ. General products include Base Reflectivity and Base Velocity as well as graphical products derived from algorithms including Spectrum Width, Vertically Integrated Liquid, and the Velocity Azimuth Display (VAD) Wind Profile.

United states doppler radar