Preface -- Acknowledgments -- Contents -- Summary -- 1 Introduction -- 2 Observations Supporting the Fundamental Infrastructure for Mesoscale Monitoring and Prediction -- 3 National Needs for Mesoscale Observations in Five Economic Sectors -- 4 Observing Systems and Technologies: Successes and Challenges -- 5 Architecture for a Network of Networks -- 6 How to Get from Here to There: Steps to Ensure Progress -- 7 Organizational Attributes and Options for a Fully Integrated NoN that Meets Multiple National Needs -- 8 Concluding Thoughts -- References -- Appendixes -- Appendix A: A Rationale for Choosing the Spatial Density and Temporal Frequency of Observations for Various Atmospheric Phenomena -- Appendix B: Tables of Surface-Based Observing Systems -- Appendix C: Acronyms and Initialisms -- Appendix D: Statement of Task -- Appendix E: Biographical Sketches of Committee Members and Staff.