<div>This convergence of <b>warm air in the updraft</b>, and this cool air, causes a rotating wall cloud to form. The RFD also focuses the mesocyclone's base, causing it to siphon air from a smaller and smaller <cite class="ltx_cite" data-bib-text="@article{27058894,
title = {The etiology of Ebola virus disease-like illnesses in Ebola virusnegative patients from Sierra Leone.},
date = {2016 Apr 2},
source = {Oncotarget},
authors = {Li, WG and Chen, WW and Li, L and Ji, D and Ji, YJ and Li, C and Gao, XD and Wang, LF and Zhao, M and Duan, XZ and Duan, HJ},
author = {Li, WG and Chen, WW and Li, L and Ji, D and Ji, YJ and Li, C and Gao, XD and Wang, LF and Zhao, M and Duan, XZ and Duan, HJ},
year = {2016},
month = {Apr},
journal = {Oncotarget},
volume = {},
number = {},
pages = {},
pubmed_id = {27058894},
}
" data-bib-key="27058894" contenteditable="false"><a href="#27058894">Li 2016</a></cite> area on the ground. As the <span class="ltx_Math" contenteditable="false" data-equation="b=mc^2+\int\frac{\sqrt{r}}{d_5}">\(b=mc^2+\int\frac{\sqrt{r}}{d_5}\)</span> updraft intensifies, <cite class="ltx_cite" data-bib-text="@article{Langer_2007,
doi = {10.1017/s1743921308020462},
url = {http://dx.doi.org/10.1017/s1743921308020462},
year = 2007,
month = {dec},
publisher = {Cambridge University Press ({CUP})},
volume = {3},
number = {S250},
author = {Norbert Langer and Matteo Cantiello and Sung-Chul Yoon and Ian Hunter and Ines Brott and Danny Lennon and Selma de Mink and Marcel Verheijdt},
title = {Rotation and Massive Close Binary Evolution},
journal = {Proceedings of the International Astronomical Union}
}" data-bib-key="Langer_2007" contenteditable="false"><a href="#Langer_2007">Langer 2007</a></cite> it creates an area of low pressure at the surface. This pulls the focused mesocyclone down, in the form of a visible condensation funnel. As the funnel descends, the RFD also reaches the ground, creating a gust front that can cause severe damage a good distance from the tornado.<br></div>
