Introducing NARCliM1.5: evaluating the performance of regional climate projections for southeast Australia for 1950-2100 Author list: Nidhi Nishant 1 , Jason P. Evans 2,3 , Giovanni Di Virgilio 1,2,3 , Stephanie M. Downes 1 , Fei Ji 1,3 , Kevin K. W. Cheung 1 , Eugene Tam 1 , Joseph Miller 1 , Kathleen Beyer 1 and Matthew L. Riley 1 1 Science, Economics and Insights Division, NSW Department of Planning, Industry and Environment, Sydney, Australia 2 Climate Change Research Centre, University of New South Wales, Sydney, Australia 3 Australian Research Council Centre of Excellence for Climate Extremes, University of New South Wales, Sydney, Australia Corresponding author: Nidhi Nishant (Nidhi.Nishant@environment.nsw.gov.au) Key Points:  The second iteration of NARCliM simulations (N1.5) are described, complementing original NARCliM simulations (N1.0) and expanding the ensemble to 24 members.  N1.5 simulations substantially improve over N1.0 simulations in capturing the seasonal patterns and magnitudes of precipitation.  N1.5 projections add information to the NARCliM ensemble including the potential for hotter and drier futures than those projected in N1.0. Accepted Article This article has been accepted for publication and undergone full peer review but has not been through the copyediting, typesetting, pagination and proofreading process, which may lead to differences between this version and the Version of Record. Please cite this article as doi: 10.1029/2020EF001833. This article is protected by copyright. All rights reserved.