span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="n">len_arr</span><span class="p">):</span>
        <span class="n">fcst_prime</span> <span class="o">=</span> <span class="n">np</span><span class="o">.</span><span class="n">ma</span><span class="o">.</span><span class="n">array</span><span class="p">(</span>
            <span class="n">fcst</span><span class="p">[</span><span class="n">i</span><span class="p">,</span> <span class="n">lat_start_idc</span><span class