159 lines
6.5 KiB
HTML
159 lines
6.5 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<html>
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<head>
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<meta content="text/html; charset=ISO-8859-1"
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http-equiv="content-type">
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<title>Hazard Grid Methodology</title>
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</head>
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<body>
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<h1>Hazard Grid Methodology</h1>
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<a href="#createnew">Create a new Hazard with MakeHazard</a><br>
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<a href="#editexisting">How to edit/delete existing hazards</a><br>
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<a href="#forcesegments">How to force a single hazard to break into two
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or more segments (WSW/NPW)</a><br>
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<br>
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<hr style="width: 100%; height: 2px;"><br>
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<big><big><span style="font-weight: bold;"><br>
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</span></big></big><big><big><span style="font-weight: bold;"><a
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name="createnew"></a><span
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style="color: rgb(102, 0, 204); text-decoration: underline;">Creating
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a New Hazard With
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MakeHazard</span></span></big></big><br>
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<big><big><span style="font-weight: bold;"><br>
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</span><small>This simple scenario describes using MakeHazard to create
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one hazard. It assumes you<br>
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are starting with no hazards in your Hazard grid.<br>
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<br>
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1. Start MakeHazard:<br>
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<br>
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<img style="width: 800px; height: 497px;" alt="Make Hazards Tool"
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src="images/MakeHazards.png"><br>
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<br>
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2. Select the Hazard you wish to create under the Hazard List.<br>
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<br>
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<img style="width: 800px; height: 497px;" alt="Make Hazards 2"
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src="images/MakeHazards2.png"><br>
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<br>
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3. Select the start and end time for the hazard you are creating.<br>
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<br>
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<img style="width: 800px; height: 497px;" alt="Make Hazards 3"
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src="images/MakeHazards3.png"><br>
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<br>
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4. Select the zones for this hazard. Note: If you do not select zones
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at this step, the hazard type and time range will
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be applied to the current active edit area in GFE.<br>
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<br>
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<img style="width: 800px; height: 497px;" alt="Make Hazard 4"
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src="images/MakeHazards4.png"><br>
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<br>
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5. Press Run/Dismiss. The tool will close, and a temporary hazard grid
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will be created. Notice in the example
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below, the grid name in hazISW, the temporary grid for an Ice Storm
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Warning.<br>
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<br>
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<img style="width: 800px; height: 497px;" alt="Make Hazards Temp Grid"
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src="images/MakeHazardTempGrid.png"><br>
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</small><span style="font-weight: bold;"></span></big><br>
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6. The final step to creating a simple hazard is to run the <a
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href="MergeHazards.html">MergeHazards</a> tool, which will recombine
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all
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temporary grids back into the actual hazard grid.<br>
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<br>
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<img style="width: 800px; height: 497px;" alt="Finished Hazard grid"
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src="images/MakeHazardHazGrid.png"><br>
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<br>
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At this point, you can run the formatter launcher, and create your
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hazard products. <br>
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<br>
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<br>
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</big><big><big><span style="font-weight: bold;"><a name="editexisting"></a><span
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style="color: rgb(102, 0, 204);"><span
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style="text-decoration: underline;">How to use tools to edit combined
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hazards</span><br>
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<br>
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<small><span style="color: rgb(0, 0, 0);">The general method for
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working with combined hazards is this:<br>
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</span></small></span></span></big></big>
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<ul>
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<li>Run <a href="SeparateHazards.html">SeparateHazards</a> to break
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the hazard grid into it's components.</li>
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<li>Click on the temporary hazard grid.</li>
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<li>Run <a href="MakeHazard.html">MakeHazard</a> and adjust the
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times or areas of the grid.</li>
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<li>If you wish to remove the hazard completely, simply delete the
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temporary grid.</li>
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<li>Run <a href="MergeHazards.html">MergeHazards</a> to recombine
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the temporary grids.</li>
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<li>Save, Publish, and run Formatter launcher for the hazard.<br>
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</li>
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</ul>
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<big>
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The Hazards grid will be locked when you run the SeparateHazards
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procedure to prevent conflicts from other users. <br>
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</big><br>
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<big><big><span style="font-weight: bold;"><a name="forcesegments"></a><span
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style="color: rgb(102, 0, 204); text-decoration: underline;">How force
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segments for the same hazard<br>
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<br>
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</span><span style="color: rgb(102, 0, 204);"><small><span
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style="color: rgb(204, 0, 0);">This method is only applicable to a
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very special case of WSW/NPW/RFW product. Normally
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GHG takes care of the segmentation of products. </span></small></span></span><span
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style="color: rgb(102, 0, 204);"><small><span
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style="color: rgb(204, 0, 0);"><small style="color: rgb(0, 0, 0);"><br><br>The
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one case where this method would be used
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is if you have a single hazard type, and you want to force two segments
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in the final product. For
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instance, if you have a Winter Storm Warning (WS.W) from 12Z to 22Z,
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but you need to talk
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about snow in the west and freezing rain in the east, you might want to
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break this into two
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segments. Here is an example using MakeHazard:</small></span></small></span><span
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style="font-weight: bold;"><span style="color: rgb(102, 0, 204);"><small><span
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style="color: rgb(204, 0, 0);"><br>
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<br>
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<span style="color: rgb(0, 0, 0);">Step 1: Run MakeHazard for the first
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segment. Enter 1 in the ETN/Segment Number box. Press Run.<br>
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<br>
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<img style="width: 800px; height: 497px;"
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alt="Forced Segments in Make Hazard 1"
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src="images/MakeHazardForcedSeg1.png"><br>
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</span> </span></small></span><span
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style="color: rgb(102, 0, 204); text-decoration: underline;"><small><span
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style="text-decoration: underline;"><span
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style="color: rgb(204, 0, 0);"></span></span></small></span></span></big></big><big><big><span
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style="font-weight: bold;"><span style="color: rgb(102, 0, 204);"><small><span
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style="color: rgb(204, 0, 0);"><span style="color: rgb(0, 0, 0);"><br>
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Step 2: Create the second segment. Enter 2 in the ETN/Segment Number
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box. Press Run/Dismiss.<br>
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<br>
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<img style="width: 800px; height: 531px;"
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alt="Forced Segment 2 in MakeHazard"
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src="images/MakeHazardForcedSeg2.png"><br>
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<br>
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</span></span></small></span></span></big></big><big><big><span
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style="font-weight: bold;"><span style="color: rgb(102, 0, 204);"><small><span
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style="color: rgb(204, 0, 0);"><span style="color: rgb(0, 0, 0);">Step
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3: Run MergeHazards.<br>
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<br>
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<img style="width: 282px; height: 294px;" alt="Merge Hazards Menu"
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src="images/MergeHazardsMenu.png"><br>
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<br>
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Step 4: Save and publish your hazard grid. Although it looks like one
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area, note the difference in the legend. <span
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style="font-style: italic;">Note that you can switch the Hazards
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display to a combination of Image and Bounded Area, and then increase
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the Line Width in order to see the different segments.</span><br>
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<br>
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<img style="width: 847px; height: 657px;" alt="Combined Segments"
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src="images/CombinedSegments.png"><br>
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<br>
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Step 5: Run the product. Notice that although VTEC codes are the same
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and headlines are the same,
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that the product has been forced into two segments.<br>
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<br>
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<img alt="" src="images/ForcedSegmentsWSW.png"><br>
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<br>
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</span></span></small></span></span></big></big>
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</body>
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</html>
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