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NRL Monterey, Marine Meteorology Division
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NRL Monterey, Marine Meteorology Division
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| Fig 1, COAMPS 54 KM 12 HR FCST | Fig 2, COAMPS 18 KM 12 HR FCST | Fig 3, COAMPS 6 KM 12 HR FCST |
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| IMPORTANCE OF NWP RESOLUTION ON SURFACE WINDS The 12-hour forecast surface wind field for the San Diego area are shown in Figures 1, 2, and 3 at 54 km, 18 km, and 6 km grid sizes. Notice the increasing information reflected in the near coastal wind pattern as one steps from the course 54 km to finest 6 km resolution. In particular notice the increasing detail of the offshore flow pattern from San Diego northward to beyond LAX. At 54 km only a slight indication of offshore flow is shown, with no additional detail over the near coastal waters. At 6 km spacing a detailed presentation of small mesoscale features from the coastline to the channel islands is shown. | ||
| Fig 4 GOES-10 VIS 12/11/00 1715Z | Fig 5 COAMPS 6 KM 16 HR FCST | Fig 6 COAMPS 6 KM 20 HR FCST |
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| The coastal area from south of San Diego to near LAX is generally clear of clouds reflecting an offshore flow pattern. An area of enhanced low cloud development is seen between the channel islands and the coastline. Note this area of enhanced low cloud development is in the general region of convergence between the easterly offshore flow and the westerly flow seaward and south of the channel islands that can be seen in Figure 3 and shown continuing in the COAMPS forecast four and eight hours later in Figures 5 and 6. | ||
| Fig 7 NOGAPS Region of COAMPS 54 KM | Fig 8 NOGAPS Region of COAMPS 18 KM | Fig 9 NOGAPS Region of COAMPS 6 KM |
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| The NOGAPS global model surface wind forecast at one degree grid spacing is shown in Figures 7,8, and 9 for the spatial areas of the COAMPS 54, 18, and 6 km grid runs seen in Figures 1,2, and 3. Note the lack of detail in the NOGAPS wind data as compared to the COAMPS output. Regardless of how close in one zooms the NOGAPS, there of course is no additional detail, below that of the basic 1 degree grid spacing. Note that thumbnails for Figures 7, 8, and 9 need to be zoomed to see the wind barbs. | ||
Author: Ron Englebretson Last Updated: Wed Dec 18 15:40:51 2002 Produced by: The Composer (Ver: 1.1.2 ) |
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