IDW Interpolation

Discussion created by pward4316 on Nov 8, 2010
Latest reply on Feb 4, 2013 by jdollasin
I am trying to create a raster that interpolates weather station rainfall readings (point data) over areas in which there are no weather stations.  When I use the IDW tool, there is an interpolation over the area defined by the northernmost, southernmost, easternmost, and westernmost weather stations, but I would actually like to extend the interpolation beyond these boundaries so that it can later be spatially joined with a polygon shapefile.  Does anyone know if/how this can be accomplished?