I'm not sure if this is the correct venue for this issue, but we are having
a problem running METRO (3.2.1) on a few sites. The one thing the sites seem
to have in common is a rather thick asphalt layers on top of concrete. When
METRo runs, we get the following message:
---------------------------------------------------
EXECUTION : METRO_MODEL module: start execution
EXECUTION : Start sending data to METRo core
DEBUT SETCONSTPHYS
FIN SETCONSTPHYS
GRILLE ROUTINE START
Numerical stability test failed
for grid level 22
Please increase the tickness of your
layer, especially the cement if present
STOP : Fatal error in METRo physical model.
----------------------------------------------------
We can make this message go away if we increase the concrete thickness or
decrease the asphalt thickness. However, this is arbitrary and I would
rather have some additional guidance on layer thicknesses.
I do not see any guidelines in the METRo documentation on minimum or
maximum number of layers or layer thickness. Is this information
documented somewhere?
I have attached the example XML files for this case.
Thank you for your attention,
jim
--
Jim Cowie
NCAR/RAL
[email protected]
303-497-2831
<?xml version ="1.0" ?>
<forecast>
<header>
<version>1.1</version>
<production-date>2009-02-02T16:22Z</production-date>
<station-id>72507108</station-id>
</header>
<prediction-list>
<prediction>
<forecast-time>2009-02-02T16:00Z</forecast-time>
<at>7.85</at>
<td>1.58</td>
<ra>0.00</ra>
<sn>0.00</sn>
<ws>8.06</ws>
<ap>1012.10</ap>
<cc>0</cc>
<wd>241.22</wd>
</prediction>
<prediction>
<forecast-time>2009-02-02T17:00Z</forecast-time>
<at>7.52</at>
<td>1.06</td>
<ra>0.00</ra>
<sn>0.00</sn>
<ws>8.67</ws>
<ap>1011.98</ap>
<cc>1</cc>
<wd>252.84</wd>
</prediction>
<prediction>
<forecast-time>2009-02-02T18:00Z</forecast-time>
<at>7.08</at>
<td>0.73</td>
<ra>0.00</ra>
<sn>0.00</sn>
<ws>8.96</ws>
<ap>1011.85</ap>
<cc>2</cc>
<wd>262.39</wd>
</prediction>
<prediction>
<forecast-time>2009-02-02T19:00Z</forecast-time>
<at>6.72</at>
<td>0.32</td>
<ra>0.00</ra>
<sn>0.00</sn>
<ws>8.70</ws>
<ap>1011.61</ap>
<cc>3</cc>
<wd>280.66</wd>
</prediction>
<prediction>
<forecast-time>2009-02-02T20:00Z</forecast-time>
<at>6.12</at>
<td>0.05</td>
<ra>0.00</ra>
<sn>0.00</sn>
<ws>8.10</ws>
<ap>1011.37</ap>
<cc>3</cc>
<wd>295.39</wd>
</prediction>
<prediction>
<forecast-time>2009-02-02T21:00Z</forecast-time>
<at>5.58</at>
<td>-0.15</td>
<ra>0.00</ra>
<sn>0.00</sn>
<ws>7.52</ws>
<ap>1011.12</ap>
<cc>4</cc>
<wd>308.42</wd>
</prediction>
<prediction>
<forecast-time>2009-02-02T22:00Z</forecast-time>
<at>4.79</at>
<td>-0.49</td>
<ra>0.00</ra>
<sn>0.00</sn>
<ws>7.31</ws>
<ap>1011.33</ap>
<cc>4</cc>
<wd>326.43</wd>
</prediction>
<prediction>
<forecast-time>2009-02-02T23:00Z</forecast-time>
<at>3.91</at>
<td>-0.83</td>
<ra>0.00</ra>
<sn>0.00</sn>
<ws>7.09</ws>
<ap>1011.55</ap>
<cc>5</cc>
<wd>346.12</wd>
</prediction>
<prediction>
<forecast-time>2009-02-03T00:00Z</forecast-time>
<at>3.09</at>
<td>-1.17</td>
<ra>0.00</ra>
<sn>0.00</sn>
<ws>6.87</ws>
<ap>1011.76</ap>
<cc>5</cc>
<wd>3.43</wd>
</prediction>
<prediction>
<forecast-time>2009-02-03T01:00Z</forecast-time>
<at>2.47</at>
<td>-1.56</td>
<ra>0.00</ra>
<sn>0.00</sn>
<ws>6.73</ws>
<ap>1011.68</ap>
<cc>6</cc>
<wd>6.67</wd>
</prediction>
<prediction>
<forecast-time>2009-02-03T02:00Z</forecast-time>
<at>2.02</at>
<td>-1.94</td>
<ra>0.00</ra>
<sn>0.00</sn>
<ws>6.59</ws>
<ap>1011.61</ap>
<cc>6</cc>
<wd>9.60</wd>
</prediction>
<prediction>
<forecast-time>2009-02-03T03:00Z</forecast-time>
<at>1.71</at>
<td>-2.33</td>
<ra>0.00</ra>
<sn>0.00</sn>
<ws>6.45</ws>
<ap>1011.54</ap>
<cc>6</cc>
<wd>12.24</wd>
</prediction>
<prediction>
<forecast-time>2009-02-03T04:00Z</forecast-time>
<at>1.48</at>
<td>-2.36</td>
<ra>0.00</ra>
<sn>0.00</sn>
<ws>8.45</ws>
<ap>1011.04</ap>
<cc>6</cc>
<wd>10.67</wd>
</prediction>
<prediction>
<forecast-time>2009-02-03T05:00Z</forecast-time>
<at>1.30</at>
<td>-2.40</td>
<ra>0.00</ra>
<sn>0.00</sn>
<ws>10.46</ws>
<ap>1010.54</ap>
<cc>6</cc>
<wd>9.65</wd>
</prediction>
<prediction>
<forecast-time>2009-02-03T06:00Z</forecast-time>
<at>1.16</at>
<td>-2.44</td>
<ra>0.00</ra>
<sn>0.00</sn>
<ws>12.46</ws>
<ap>1010.04</ap>
<cc>6</cc>
<wd>8.95</wd>
</prediction>
<prediction>
<forecast-time>2009-02-03T07:00Z</forecast-time>
<at>1.02</at>
<td>-2.45</td>
<ra>0.00</ra>
<sn>0.00</sn>
<ws>13.93</ws>
<ap>1009.52</ap>
<cc>7</cc>
<wd>8.29</wd>
</prediction>
<prediction>
<forecast-time>2009-02-03T08:00Z</forecast-time>
<at>0.85</at>
<td>-2.45</td>
<ra>0.00</ra>
<sn>0.00</sn>
<ws>15.41</ws>
<ap>1008.99</ap>
<cc>7</cc>
<wd>7.76</wd>
</prediction>
<prediction>
<forecast-time>2009-02-03T09:00Z</forecast-time>
<at>0.62</at>
<td>-0.38</td>
<ra>0.06</ra>
<sn>0.00</sn>
<ws>16.89</ws>
<ap>1008.47</ap>
<cc>7</cc>
<wd>7.32</wd>
</prediction>
<prediction>
<forecast-time>2009-02-03T10:00Z</forecast-time>
<at>0.30</at>
<td>-0.70</td>
<ra>0.27</ra>
<sn>0.00</sn>
<ws>19.26</ws>
<ap>1008.00</ap>
<cc>7</cc>
<wd>11.35</wd>
</prediction>
<prediction>
<forecast-time>2009-02-03T11:00Z</forecast-time>
<at>-0.03</at>
<td>-1.03</td>
<ra>0.61</ra>
<sn>0.00</sn>
<ws>21.63</ws>
<ap>1007.53</ap>
<cc>7</cc>
<wd>14.75</wd>
</prediction>
<prediction>
<forecast-time>2009-02-03T12:00Z</forecast-time>
<at>-0.29</at>
<td>-1.29</td>
<ra>1.10</ra>
<sn>0.00</sn>
<ws>24.00</ws>
<ap>1007.06</ap>
<cc>8</cc>
<wd>17.63</wd>
</prediction>
<prediction>
<forecast-time>2009-02-03T13:00Z</forecast-time>
<at>-0.41</at>
<td>-1.41</td>
<ra>1.59</ra>
<sn>0.00</sn>
<ws>23.73</ws>
<ap>1006.72</ap>
<cc>7</cc>
<wd>18.02</wd>
</prediction>
<prediction>
<forecast-time>2009-02-03T14:00Z</forecast-time>
<at>-0.43</at>
<td>-1.43</td>
<ra>2.09</ra>
<sn>0.00</sn>
<ws>23.45</ws>
<ap>1006.38</ap>
<cc>6</cc>
<wd>18.42</wd>
</prediction>
<prediction>
<forecast-time>2009-02-03T15:00Z</forecast-time>
<at>-0.41</at>
<td>-1.41</td>
<ra>2.60</ra>
<sn>0.00</sn>
<ws>23.18</ws>
<ap>1006.04</ap>
<cc>5</cc>
<wd>18.81</wd>
</prediction>
<prediction>
<forecast-time>2009-02-03T16:00Z</forecast-time>
<at>-0.41</at>
<td>-1.41</td>
<ra>3.05</ra>
<sn>0.00</sn>
<ws>24.13</ws>
<ap>1005.09</ap>
<cc>5</cc>
<wd>16.15</wd>
</prediction>
<prediction>
<forecast-time>2009-02-03T17:00Z</forecast-time>
<at>-0.43</at>
<td>-1.43</td>
<ra>3.43</ra>
<sn>0.00</sn>
<ws>25.08</ws>
<ap>1004.14</ap>
<cc>4</cc>
<wd>13.62</wd>
</prediction>
<prediction>
<forecast-time>2009-02-03T18:00Z</forecast-time>
<at>-0.47</at>
<td>-1.47</td>
<ra>3.76</ra>
<sn>0.00</sn>
<ws>26.04</ws>
<ap>1003.19</ap>
<cc>4</cc>
<wd>11.23</wd>
</prediction>
<prediction>
<forecast-time>2009-02-03T19:00Z</forecast-time>
<at>-0.53</at>
<td>-1.53</td>
<ra>4.06</ra>
<sn>0.00</sn>
<ws>24.43</ws>
<ap>1002.94</ap>
<cc>4</cc>
<wd>7.71</wd>
</prediction>
<prediction>
<forecast-time>2009-02-03T20:00Z</forecast-time>
<at>-0.63</at>
<td>-1.63</td>
<ra>4.35</ra>
<sn>0.00</sn>
<ws>22.82</ws>
<ap>1002.69</ap>
<cc>5</cc>
<wd>3.75</wd>
</prediction>
<prediction>
<forecast-time>2009-02-03T21:00Z</forecast-time>
<at>-0.77</at>
<td>-1.77</td>
<ra>4.61</ra>
<sn>0.00</sn>
<ws>21.20</ws>
<ap>1002.43</ap>
<cc>5</cc>
<wd>359.32</wd>
</prediction>
<prediction>
<forecast-time>2009-02-03T22:00Z</forecast-time>
<at>-0.97</at>
<td>-1.97</td>
<ra>4.97</ra>
<sn>0.00</sn>
<ws>20.28</ws>
<ap>1002.50</ap>
<cc>6</cc>
<wd>359.37</wd>
</prediction>
<prediction>
<forecast-time>2009-02-03T23:00Z</forecast-time>
<at>-1.19</at>
<td>-2.19</td>
<ra>5.42</ra>
<sn>0.00</sn>
<ws>19.35</ws>
<ap>1002.56</ap>
<cc>6</cc>
<wd>359.43</wd>
</prediction>
<prediction>
<forecast-time>2009-02-04T00:00Z</forecast-time>
<at>-1.44</at>
<td>-2.44</td>
<ra>5.97</ra>
<sn>0.00</sn>
<ws>18.43</ws>
<ap>1002.62</ap>
<cc>6</cc>
<wd>359.50</wd>
</prediction>
<prediction>
<forecast-time>2009-02-04T01:00Z</forecast-time>
<at>-1.70</at>
<td>-2.70</td>
<ra>6.46</ra>
<sn>0.00</sn>
<ws>17.91</ws>
<ap>1002.94</ap>
<cc>6</cc>
<wd>357.09</wd>
</prediction>
<prediction>
<forecast-time>2009-02-04T02:00Z</forecast-time>
<at>-1.99</at>
<td>-2.99</td>
<ra>6.89</ra>
<sn>0.00</sn>
<ws>17.39</ws>
<ap>1003.26</ap>
<cc>6</cc>
<wd>354.51</wd>
</prediction>
<prediction>
<forecast-time>2009-02-04T03:00Z</forecast-time>
<at>-2.34</at>
<td>-3.34</td>
<ra>7.26</ra>
<sn>0.00</sn>
<ws>16.88</ws>
<ap>1003.57</ap>
<cc>6</cc>
<wd>351.76</wd>
</prediction>
<prediction>
<forecast-time>2009-02-04T04:00Z</forecast-time>
<at>-2.76</at>
<td>-3.76</td>
<ra>7.62</ra>
<sn>0.00</sn>
<ws>16.06</ws>
<ap>1003.97</ap>
<cc>6</cc>
<wd>349.42</wd>
</prediction>
<prediction>
<forecast-time>2009-02-04T05:00Z</forecast-time>
<at>-3.19</at>
<td>-4.19</td>
<ra>7.98</ra>
<sn>0.00</sn>
<ws>15.25</ws>
<ap>1004.37</ap>
<cc>7</cc>
<wd>346.92</wd>
</prediction>
<prediction>
<forecast-time>2009-02-04T06:00Z</forecast-time>
<at>-3.55</at>
<td>-4.55</td>
<ra>8.34</ra>
<sn>0.00</sn>
<ws>14.44</ws>
<ap>1004.77</ap>
<cc>7</cc>
<wd>344.25</wd>
</prediction>
<prediction>
<forecast-time>2009-02-04T07:00Z</forecast-time>
<at>-3.80</at>
<td>-4.80</td>
<ra>8.66</ra>
<sn>0.00</sn>
<ws>13.80</ws>
<ap>1005.00</ap>
<cc>7</cc>
<wd>341.61</wd>
</prediction>
<prediction>
<forecast-time>2009-02-04T08:00Z</forecast-time>
<at>-4.04</at>
<td>-5.04</td>
<ra>8.95</ra>
<sn>0.00</sn>
<ws>13.16</ws>
<ap>1005.23</ap>
<cc>7</cc>
<wd>338.80</wd>
</prediction>
<prediction>
<forecast-time>2009-02-04T09:00Z</forecast-time>
<at>-4.42</at>
<td>-5.42</td>
<ra>9.20</ra>
<sn>0.00</sn>
<ws>12.52</ws>
<ap>1005.46</ap>
<cc>8</cc>
<wd>335.79</wd>
</prediction>
<prediction>
<forecast-time>2009-02-04T10:00Z</forecast-time>
<at>-5.01</at>
<td>-6.01</td>
<ra>9.41</ra>
<sn>0.00</sn>
<ws>12.60</ws>
<ap>1006.14</ap>
<cc>7</cc>
<wd>334.66</wd>
</prediction>
<prediction>
<forecast-time>2009-02-04T11:00Z</forecast-time>
<at>-5.62</at>
<td>-6.62</td>
<ra>9.59</ra>
<sn>0.00</sn>
<ws>12.68</ws>
<ap>1006.83</ap>
<cc>7</cc>
<wd>333.49</wd>
</prediction>
<prediction>
<forecast-time>2009-02-04T12:00Z</forecast-time>
<at>-5.97</at>
<td>-6.97</td>
<ra>9.74</ra>
<sn>0.00</sn>
<ws>12.76</ws>
<ap>1007.51</ap>
<cc>7</cc>
<wd>332.27</wd>
</prediction>
<prediction>
<forecast-time>2009-02-04T13:00Z</forecast-time>
<at>-5.87</at>
<td>-6.87</td>
<ra>9.85</ra>
<sn>0.00</sn>
<ws>13.44</ws>
<ap>1008.08</ap>
<cc>6</cc>
<wd>330.12</wd>
</prediction>
<prediction>
<forecast-time>2009-02-04T14:00Z</forecast-time>
<at>-5.39</at>
<td>-10.56</td>
<ra>9.85</ra>
<sn>0.00</sn>
<ws>14.11</ws>
<ap>1008.64</ap>
<cc>5</cc>
<wd>328.06</wd>
</prediction>
<prediction>
<forecast-time>2009-02-04T15:00Z</forecast-time>
<at>-4.67</at>
<td>-10.68</td>
<ra>9.85</ra>
<sn>0.00</sn>
<ws>14.79</ws>
<ap>1009.21</ap>
<cc>4</cc>
<wd>326.07</wd>
</prediction>
</prediction-list>
</forecast>
<?xml version ="1.0" ?>
<observation>
<header>
<filetype>rwis-observation</filetype>
<version>1.0</version>
<road-station>72507108</road-station>
</header>
<measure-list>
<measure>
<observation-time>2009-02-02T05:00Z</observation-time>
<at>9999.00</at>
<td>9999.00</td>
<pi>0</pi>
<ws>9999.00</ws>
<sc>33</sc>
<st>9999.00</st>
<sst>9999.00</sst>
</measure>
<measure>
<observation-time>2009-02-02T06:00Z</observation-time>
<at>9999.00</at>
<td>9999.00</td>
<pi>0</pi>
<ws>9999.00</ws>
<sc>33</sc>
<st>9999.00</st>
<sst>9999.00</sst>
</measure>
<measure>
<observation-time>2009-02-02T07:00Z</observation-time>
<at>9999.00</at>
<td>9999.00</td>
<pi>0</pi>
<ws>9999.00</ws>
<sc>33</sc>
<st>9999.00</st>
<sst>9999.00</sst>
</measure>
<measure>
<observation-time>2009-02-02T08:00Z</observation-time>
<at>9999.00</at>
<td>9999.00</td>
<pi>0</pi>
<ws>9999.00</ws>
<sc>33</sc>
<st>9999.00</st>
<sst>9999.00</sst>
</measure>
<measure>
<observation-time>2009-02-02T09:00Z</observation-time>
<at>9999.00</at>
<td>9999.00</td>
<pi>0</pi>
<ws>9999.00</ws>
<sc>33</sc>
<st>9999.00</st>
<sst>9999.00</sst>
</measure>
<measure>
<observation-time>2009-02-02T10:00Z</observation-time>
<at>9999.00</at>
<td>9999.00</td>
<pi>0</pi>
<ws>9999.00</ws>
<sc>33</sc>
<st>9999.00</st>
<sst>9999.00</sst>
</measure>
<measure>
<observation-time>2009-02-02T11:00Z</observation-time>
<at>9999.00</at>
<td>9999.00</td>
<pi>0</pi>
<ws>9999.00</ws>
<sc>33</sc>
<st>9999.00</st>
<sst>9999.00</sst>
</measure>
<measure>
<observation-time>2009-02-02T12:00Z</observation-time>
<at>9999.00</at>
<td>9999.00</td>
<pi>0</pi>
<ws>9999.00</ws>
<sc>33</sc>
<st>9999.00</st>
<sst>9999.00</sst>
</measure>
<measure>
<observation-time>2009-02-02T13:00Z</observation-time>
<at>9999.00</at>
<td>9999.00</td>
<pi>0</pi>
<ws>9999.00</ws>
<sc>33</sc>
<st>9999.00</st>
<sst>9999.00</sst>
</measure>
<measure>
<observation-time>2009-02-02T14:00Z</observation-time>
<at>9999.00</at>
<td>9999.00</td>
<pi>0</pi>
<ws>9999.00</ws>
<sc>33</sc>
<st>9999.00</st>
<sst>9999.00</sst>
</measure>
<measure>
<observation-time>2009-02-02T15:00Z</observation-time>
<at>4.98</at>
<td>1.62</td>
<pi>0</pi>
<ws>7.04</ws>
<sc>33</sc>
<st>-1.07</st>
<sst>0.10</sst>
</measure>
<measure>
<observation-time>2009-02-02T16:00Z</observation-time>
<at>5.84</at>
<td>1.17</td>
<pi>0</pi>
<ws>7.93</ws>
<sc>33</sc>
<st>-0.90</st>
<sst>0.06</sst>
</measure>
</measure-list>
</observation>
<?xml version ="1.0" ?>
<station>
<header>
<filetype>rwis-configuration</filetype>
<version>1.0</version>
<road-station>72507108</road-station>
<time-zone>EST5EDT</time-zone>
<production-date>2009-02-02T16:22Z</production-date>
<coordinate>
<latitude>41.50</latitude>
<longitude>-71.10</longitude>
</coordinate>
<station-type>road</station-type>
</header>
<roadlayer-list>
<roadlayer>
<position>1</position>
<type>asphalt</type>
<thickness>0.3302</thickness>
</roadlayer>
<roadlayer>
<position>2</position>
<type>cement</type>
<thickness>0.2750</thickness>
</roadlayer>
<roadlayer>
<position>3</position>
<type>crushed rock</type>
<thickness>0.3048</thickness>
</roadlayer>
</roadlayer-list>
</station>
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