The <a href="https://en.wikipedia.org/wiki/National_Weather_Service" id="mwAWA" rel="mw:WikiLink" title="National Weather Service">National Weather Service</a> in the <a href="https://en.wikipedia.org/wiki/United_States" id="mwAWE" rel="mw:WikiLink" title="United States">United States</a> switches from the <a href="https://en.wikipedia.org/wiki/Fujita_scale" id="mwAWI" rel="mw:WikiLink" title="Fujita scale">Fujita scale</a> to the new <a href="https://en.wikipedia.org/wiki/Enhanced_Fujita_scale" id="mwAWM" rel="mw:WikiLink" title="Enhanced Fujita scale">Enhanced Fujita scale</a> to measure the intensity and strength of tornadoes.<sup about="#mwt187" class="mw-ref reference" data-mw='{"name":"ref","attrs":{},"body":{"id":"mw-reference-text-cite_note-35"}}' id="cite_ref-35" rel="dc:references" typeof="mw:Extension/ref"><a href="./February_1#cite_note-35" id="mwAWQ" style="counter-reset: mw-Ref 35;"><span class="mw-reflink-text" id="mwAWU">[35]</span></a></sup>
<span class="mw-reference-text" id="mw-reference-text-cite_note-35"><cite about="#mwt184" class="citation web cs1" id="mwCE4"><a class="external text" href="http://www.spc.noaa.gov/faq/tornado/f-scale.html" id="mwCE8" rel="mw:ExtLink nofollow">"Fujita Tornado Damage Scale"</a>. <i id="mwCFA">www.spc.noaa.gov</i>.</cite><span about="#mwt184" class="Z3988" id="mwCFE" title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=unknown&amp;rft.jtitle=www.spc.noaa.gov&amp;rft.atitle=Fujita+Tornado+Damage+Scale&amp;rft_id=http%3A%2F%2Fwww.spc.noaa.gov%2Ffaq%2Ftornado%2Ff-scale.html&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AFebruary+1"></span></span>