# Limit thresholds types

<table data-full-width="false"><thead><tr><th>Evaluation Scheme</th><th></th><th>Usage</th></tr></thead><tbody><tr><td>HIGH-RED</td><td><img src="/files/dn6jzBBqnsIcM1PSwjBt" alt="" data-size="original"></td><td>Criticality in the upper value range. Typically used for <a href="/pages/NSDr9yUP1h7Qs9Bvqltd">wind speed</a>, <a href="/pages/NSDr9yUP1h7Qs9Bvqltd#thunderstorm-prob">thunderstorm prob</a>. and <a href="/pages/NSDr9yUP1h7Qs9Bvqltd#icing-potential">icing potential</a>.</td></tr><tr><td>HIGH-GREEN</td><td><img src="/files/PtngslbrRtUsuiZkaZZL" alt="" data-size="original"></td><td>Criticality in the lower value range. Typically used for visibility and the<a href="/pages/NSDr9yUP1h7Qs9Bvqltd#lifted-index"> lifted index</a>.</td></tr><tr><td>MIDDLE-RED</td><td><img src="/files/PeICsbQU9Lmb85JmbIO9" alt="" data-size="original"></td><td>Criticality in the middle value range. E,g, avoiding low spread.</td></tr><tr><td>MIDDLE-GREEN</td><td><img src="/files/KZ5BtqUg0aSXwpHjhSi8" alt="" data-size="original"></td><td>Criticality at the boundaries of the value range. Typically used for <a href="/pages/NSDr9yUP1h7Qs9Bvqltd#outside-air-temperature">temperature</a>.</td></tr></tbody></table>


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