NWS Doppler Radar SRM 4-Panel March 2, 2012

Flooding and Rip Current Concerns from Chantal; Lingering Flood Watches in Central Texas

Chantal is now a Tropical Depression. Flash flood concerns continue across portions of central North Carolina into Monday. Life-threatening surf and rip currents conditions are expected to continue at beaches along the U.S. East Coast from northeastern Florida to the Mid-Atlantic states during the next day or so. Flood Watches and recovery continue across central Texas. Read More >

NWS Doppler Radar (WSR-88D) Example Products

A 4-panel of storm-relative motion (SRM) velocity data at 4 different elevation angles from the KLVX WSR-88D Doppler Radar. SRM data depicts estimated velocity values relative to entities moving through their environment (e.g., the wind a thunderstorm "feels" as it moves). Green (red) colors depict winds moving toward (away from) the radar location (at Ft. Knox for KLVX radar).

At left is a 4-panel SRM display that matches the 4-panel reflectivity display on the sample Doppler radar data page from the tornadic supercell thunderstorm over south-central Indiana on March 2, 2012. In the top left panel, a tight, strong, cyclonic (counterclockwise) rotational couplet (low-level mesocyclone) is evident in northwest Clark County where an EF3-EF4 tornado occurred. Higher up in the storm, SRM showed a deep-layered mesocyclone (top right, bottom right), with storm-top divergence at lower left.