OBJECTIVES AND BENEFITS: MANY WATER RESOURCES PLANNING DECISIONS REQUIRE UNDERSTANDING THE VULNERABILITY OF HYDROLOGIC SYSTEMS TO A WIDE RANGE OF DIFFERENT STRESSES. FOR MANY USERS THIS REQUIRES DEVELOPING A SET OF DISCRETE QUANTITATIVE HYDROLOGIC STORYLINES OF CLIMATE CHANGE IMPACTS THAT CAN BE USED TO EVALUATE ADAPTATION MEASURES. QUANTITATIVE HYDROLOGIC STORYLINES RELY ON MODERN CLIMATE DOWNSCALING TOOLS AND PROCESS-BASED HYDROLOGIC MODELS. EACH STORYLINE REPRESENTS KEY FEATURES FROM THE FULL RANGE OF POSSIBLE CLIMATE SCENARIOS AND TAKEN TOGETHER THE STORYLINES PROVIDE A COMPREHENSIVE YET CONCISE DESCRIPTION OF POSSIBLE CLIMATE CHANGE IMPACTS. THE RESEARCH COMMUNITY HAS MADE SUBSTANTIAL SCIENTIFIC ADVANCES IN UNDERSTANDING IMPACTS OF CLIMATE VARIABILITY AND CHANGE ON WATER RESOURCE SYSTEMS; HOWEVER THE TECHNOLOGIES IN CLIMATE DOWNSCALING AND HYDROLOGIC MODELING HAVE CONSIDERABLE UNREALIZED POTENTIAL AND LACK SUFFICIENT TECHNICAL READINESS TO BE USED WIDELY FOR WATER RESOURCES PLANNING. THE GOAL OF THIS PROPOSED PROJECT IS TO INCREASE THE VALUE OF EMERGING SCIENCE ADVANCES IN CLIMATE DOWNSCALING AND HYDROLOGIC MODELING FOR WATER RESOURCES PLANNING. THIS PROPOSED WORK WILL PROVIDE TOOLS AND DATA RESOURCES FOR BOTH RESEARCHERS AND PRACTITIONERS TO BETTER MANAGE CURRENT CLIMATE RISK REVEAL FUTURE CLIMATE CHANGE RISKS AND MORE EFFECTIVELY EVALUATE FUTURE CHANGE AND ADAPTATION OPTIONS. OUTLINE OF THE PROPOSED WORK AND METHODOLOGY: WE PROPOSE TO INCREASE THE READINESS OF EMERGING TECHNOLOGIES IN CLIMATE DOWNSCALING AND HYDROLOGIC MODELING BY EXTENDING THE NASA LAND INFORMATION SYSTEM (NASA-LIS) TO EVALUATE CLIMATE-RELATED RISKS IN THE WATER SECTOR.