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<br />.' , <br /> <br />NWS in NOAA Technical Memoranda NWS HYDRO 39 and 41 to achieve average <br />values oftotal PMP. <br /> <br />Pages 21-23, Orographic effects: <br /> <br />In our opinion, the tone ofIR#1 could be significantly improved by changing the title of <br />this section to "Orographic Effects". <br /> <br />This section does not appear to lead to any well defined conclusions. <br /> <br />In the 2nd paragraph, the authors identify a labeling error in HMR-55A Figure 2,19. The <br />mislabeling had no effect on values of storm centered PMP finally adopted in HMR-55A <br />or NWS1995. <br /> <br />Page 27, Barrier Effects: <br /> <br />Matters in this section were addressed in our answer to Question 21 ofNWS2001. We <br />wish to defer further comment on this section until we can better determine exactly where <br />the authors are going in the last three paragraphs, <br /> <br />Pages 28-30: <br /> <br />We were unable to understand the last sentence of the first paragraph on page 28, Is its <br />composition what the authors intended? <br /> <br />We did not find specification of actual storm movement in these pages, only comments <br />on the similarity of rainfall patterns and cloud-layer wind direction, We recognize that <br />the storm isohyetal pattern and the movement of a synoptic or sub-synoptic scale pressure <br />system are likely to be related, but this relationship was not shown in thissection, The <br />differences in direction for the same storms between the two tables on page 19, and listed <br />under the same coluIIUl headings is confusing, <br /> <br />It seems that a typical sub-cloud direction from the uppermost table on page 29 is about <br />130 degrees, Assuming that the authors are proposing that the long axis of the isohyetal <br />pattern associated with a PMP event in or around the Cherry Creek Drainage be <br />approximately orthogonal to the sub-cloud direction, the resulting isohyetal alignment <br />agrees well with the recommended orientation for PMP within plus or minus 40 degrees <br />as shown in Figure 8 ofHMR 52. The NWS1955 uses the tolerance of plus or minus 40 <br />degrees specified in HMR 52 to reach its results. <br /> <br />The topographic effects of the Palmer Ridge were dealt with in the answers to Questions <br />21 and 22 in NWSR200 I. <br /> <br />II <br />