The authors would like to thank NCAR's Scientific Computing Division (SCD) for supporting part of the calculation and providing the reanalysis data and the global SST data. A special thanks also goes to the Climate Prediction Center (CPC) for providing the real-time precipitation analysis data. Appreciation is extended to Mr. T. Matsui for providing the TOVS skin temperature data. The comments and suggestions offered by the two anonymous reviewers contributed to considerable improvement of the paper. This research is sponsored by NASA Grants NAG5-11044 and NAG5-9328, NOAA Grants NA16GP1605 and NA06GP0477, and SAHRA (NSF STC on “Sustainability of Semi-Arid Hydrology and Riparian Areas”) Grant ERA-9876800.
Anderson, B. T., 2002: Regional simulation of intraseasonal variations in the summertime hydrologic cycle over the southwestern United States. J. Climate, 15 , 2282–2300.
Anderson, B. T., , J. O. Roads, , and S-C. Chen, 2000a: Large-scale forcing of summertime monsoon surges over the Gulf of California and southwestern United States. J. Geophys. Res, 105 (D19) 24455–24467.
Anderson, B. T., , J. O. Roads, , S-C. Chen, , and H-M. H. Juang, 2000b: Regional simulation of the low-level monsoon winds over the Gulf of California and southwestern United States. J. Geophys. Res, 105 (D14) 17955–17969.
Anderson, B. T., , J. O. Roads, , and S-C. Chen, 2001: Model dynamics of summertime low-level jets over northwestern Mexico. J. Geophys. Res, 106 (D4) 3401–3413.
Bryson, R. A., , and W. P. Lowry, 1955: The synoptic climatology of the Arizona summer precipitation singularity. Bull. Amer. Meteor. Soc, 36 , 329–339.
Carleton, A. M., 1986: Synoptic-dynamic character of “bursts” and “breaks” in the southwest U.S. summer precipitation singularity. J. Climatol, 6 , 605–623.
Chen, F., , and J. Dudhia, 2001: Coupling an advanced land surface– hydrology model with the Penn State–NCAR MM5 modeling system. Part I: Model description and implementation. Mon. Wea. Rev, 129 , 569–585.
Chen, F., , Z. Janjic, , and K. Mitchell, 1997: Impact of atmospheric surface-layer parameterizations in the new land-surface scheme of the NCEP mesoscale Eta Model. Bound.-Layer Meteor, 85 , 391–421.
Dunn, L. B., , and J. D. Horel, 1994a: Prediction of central Arizona convection. Part I: Evaluation of the NGM and Eta Model precipitation forecasts. Wea. Forecasting, 9 , 495–507.
Dunn, L. B., , and J. D. Horel, 1994b: Prediction of central Arizona convection. Part II: Further examination of the Eta Model forecasts. Wea. Forecasting, 9 , 508–521.
Giorgi, F., 1991: Sensitivity of simulated summertime precipitation over the western United States to different physics parameterizations. Mon. Wea. Rev, 119 , 2870–2888.
Giorgi, F., , C. S. Brodeur, , and G. T. Bates, 1994: Regional climate change scenarios over the United States produced with a nested regional climate model. J. Climate, 7 , 375–399.
Gochis, D. J., , W. J. Shuttleworth, , and Z-L. Yang, 2002: Sensitivity of the North American monsoon regional climate to convective parameterization. Mon. Wea. Rev, 130 , 1282–1298.
Gochis, D. J., , W. J. Shuttleworth, , and Z-L. Yang, 2003: Hydrometeorological response of the modeled North American monsoon to convective parameterization. J. Hydrometeor, 4 , 235–250.
Grell, G. A., , J. Dudhia, , and D. R. Stauffer, 1994: A description of the fifth-generation Penn State/NCAR Mesoscale Model (MM5). NCAR Tech. Note NCAR/TN-398+STR, 117 pp.
Gutzler, D., and Coauthors, 2004: The North American Monsoon Model Assessment Project (NAMAP). NCEP Climate Prediction Center Atlas 11, 32 pp.
Higgins, R. W., , J. E. Janowiak, , and Y. Yao, 1996: A Gridded Hourly Precipitation Data Base for the United States (1963–1993). NCEP Climate Prediction Center Atlas 1, 47 pp.
Higgins, R. W., , Y. Yao, , and X. Wang, 1997: Influence of the North American monsoon system on the United States summer precipitation regime. J. Climate, 10 , 2600–2622.
Kain, J. S., , and J. M. Fritsch, 1990: Convective paramaterization for mesoscale model: The Kain–Fritsch scheme. The Representation of Cumulus Convection in Numerical Models, No. 46, Amer. Meteor. Soc., 165–170.
Kanamitsu, M., , and K. C. Mo, 2003: Dynamical effect of land surface processes on summer precipitation over the southwestern United States. J. Climate, 16 , 496–509.
Lakshmi, V., , and J. Susskind, 2000: Validation of TOVS land surface parameters using ground observations. J. Geophys. Res, 105 (D2) 2179–2190.
Lakshmi, V., , J. Susskind, , and B. J. Choudhury, 1998: Determination of land skin temperatures, surface air temperature and humidity from TOVS HIRS2/MSU data. Adv. Space Res, 22 , 629–636.
Reitan, C. H., 1957: The role of precipitable water vapor in Arizona's summer rains. Tech. Rep. on the Meteorology and Climatology of Arid Regions 2, Institute of Atmospheric Physics, The University of Arizona, Tucson, AZ, 19 pp.
Schmitz, J. T., , and S. L. Mullen, 1996: Water vapor transport associated with the summertime North American monsoon as depicted by ECMWF analyses. J. Climate, 9 , 1621–1634.
Stensrud, D. J., , R. L. Gall, , S. L. Mullen, , and K. W. Howard, 1995: Model climatology of the Mexican monsoon. J. Climate, 8 , 1775–1794.
Susskind, J., , and V. Lakshmi, 1997: Assessment of climate forcing using TOVS Pathfinder Path A data. Preprints, Eighth Symp. on Global Change Studies, Long Beach, CA, Amer. Meteor. Soc., 108–111.
Tang, M., , and E. R. Reiter, 1984: Plateau monsoons of the Northern Hemisphere: A comparison between North America and Tibet. Mon. Wea. Rev, 112 , 617–637.
Xu, J., , and E. Small, 2002: Simulating summertime rainfall variability in the North American monsoon region: The influence of convection and radiation parameterizations. J. Geophys. Res.,107, 4727, doi:10.1029/2001JD002047.