PRECIPITATION AND ATTENUATION MEASUREMENTS AT A 10-CM WAVELENGTH

On 9 June 1993, a squall line passed over the National Severe Storms L aboratory Cimarron radar and polarimetric data of this event were reco rded. The line produced heavy rain and at one time was oriented north- south, extending over the radar site. At that time intense rainfall oc curred over the radar. Polarimetric radar data from this event are exa mined to explore the utility of polarization radar techniques for rain fall monitoring and to evaluate the rain accumulation algorithm of the National Weather Services WSR-88D radar. The Twin Lakes WSR-88D radar observed the same squall line but from a different viewing angle. An unexpectedly large attenuation was experienced by the 10-cm-wavelength radiation, leading to large errors in conventional rain estimation te chniques. An independent assessment of the rain measurements is made u sing rain accumulation in a dense network of surface rain gauges.