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<br />III'IP'" <br /> <br />....' <br /> <br />" <br /> <br />a Vl(AC AT P- 700.000 ON 8JOnooo. I U"3 .loUl.. <br /> <br /> <br />::~: ~.:.... .. <br /> <br />'j <br />.. !f <br />.J <br /> <br />b ~.H PCP AT S- <br /> <br />1.000 ON 630no. <br /> <br /> <br />Figure 1. Monsoon flow and precipitation over the West. MM4 simulations of the <br />monsoon flow at 700 mb on July 20, 1983, at 0000 UTC (figure la). . Vectors <br />indicate airflow with moisture sources in the Gulf of Mexico and Pacific marked by <br />bold arrows. MM4 grid points are marked by small dots and wind vectors are <br />plotted at every 3rd point. Large dots (e) show the very coarse resolution of the <br />general circulation model grid with - 500-krn resolution. The nested Ciark model <br />domains for 10-krn (solid bold square) and 5-krn resolution (dashed square) are <br />marked over the Gunnison Basin. Precipitation predicted by MM4 from 1200 UTC <br />on July 19 to 1200 UTC July 20, 1983, shows a 5.25-cm maximum over Colorado <br />(figure Ib). <br /> <br />5 <br /> <br />Matthews et al. <br />