<p>#Tutorial ##How to use the CUAHSI Subsetter Tool: National Water Model v1.2</p>
<ol type="1">
<li>Open the <em>Map</em> tab</li>
<li>Zoom to your area of interest on the map until you can see the catchments outlined in Green (these are HUC12)</li>
<li>Use your cursor to select the one or multiple green HUC12 catchments. You will see a box outlining the area that the tool will subset. _*Note: if the box outline is Red, the catchment you have selected is too large to subset_</li>
<li>Once you are satisfied with selected area, press the <em>Submit</em> button in the lower right corner below the map.</li>
<li>Your catchment is being subsetted! Wait for the tool to process…</li>
<li>Download your tar.gz file containing the domain files necessary to run the NWM at the area you selected</li>
</ol>
<p>######Considerations - Try to select a headwaters catchment, as the tool does not currently support upstream tracing - Some other things to consider…</p>
<p>##Other helpful tools ####Reading Domain files and Outputs National Water Model NetCDF domain files and outputs can be easily accessed using the R package rwrfhydro (<a href="https://ral.ucar.edu/projects/wrf_hydro/rwrfhydro" class="uri">https://ral.ucar.edu/projects/wrf_hydro/rwrfhydro</a>) developed at NCAR.<br />
######Some helpful R rwrfhydro tools that can be used with the CUAHSI subsetter… - Read the <code>RouteLink.nc</code> file - this is helpful to find the COMID that is associated with your USGS site number<br />
<code>myRouteLinkFile &lt;- ReadRouteLink("/mypath/Route_Link.nc")</code></p>
