Observations of Severe Storms By a Novel, Polarimetric, Phased Array Mobile Radar

The University of Massachusetts Low-Power Radar (UMass LPR) is a recently-mobilized, polarimetric, phased-array radar with a half-power beam width of 2 degrees than can scan 90 x 30 degree sector-volumes in approximately 30 seconds. Originally developed by Raytheon for weather and air traffic applications, the LPR makes polarimetric observations in the alternate-transmit/alternate-receive (ATAR) mode. In spring 2018, UMass LPR was fielded for the first time to collect rapid polarimetric observations of potentially tornadic supercells. This presentation will include a preliminary look at LPR observations collected in storms during 2018, including some in a nontornadic supercell. Engineering and logistical matters particular to this radar system will also be briefly reviewed.