Editing Tornado (section)

===Electromagnetic, lightning, and other effects===
Tornadoes emit on the [[electromagnetic spectrum]], with [[sferics]] and [[E-field]] effects detected.<ref name="field programs history"/><ref>{{cite journal|first1=John R.|last1=Leeman|first2=E. D.|last2=Schmitter|title=Electric signals generated by tornados|journal=Atmos. Res.|volume=92|issue=2|pages=277–79|date=April 2009|doi=10.1016/j.atmosres.2008.10.029|bibcode=2009AtmRe..92..277L}}</ref><ref name="in situ history">{{cite conference|first=Timothy M.|last=Samaras|author-link=Tim Samaras|title=A Historical Perspective of In-Situ Observations within Tornado Cores|book-title=Preprints of the 22nd Conf. Severe Local Storms|publisher=American Meteorological Society|date=October 2004|location=Hyannis, MA|url=http://ams.confex.com/ams/11aram22sls/techprogram/paper_81153.htm|access-date=2007-05-23|archive-date=2011-01-15|archive-url=https://web.archive.org/web/20110115081005/http://ams.confex.com/ams/11aram22sls/techprogram/paper_81153.htm|url-status=live}}</ref> There are observed correlations between tornadoes and patterns of lightning. Tornadic storms do not produce more lightning than other storms and some tornadic cells never produce lightning at all. More often than not, overall cloud-to-ground (CG) lightning activity decreases as a tornado touches the surface and returns to the baseline level when the tornado dissipates. In many cases, intense tornadoes and thunderstorms exhibit an increased and anomalous dominance of positive polarity CG discharges.<ref name="CG tor">{{cite journal|first1=Antony H.|last1=Perez |first2=Louis J.|last2=Wicker |first3=Richard E.|last3=Orville  |name-list-style=amp |title=Characteristics of Cloud-to-Ground Lightning Associated with Violent Tornadoes|journal=Weather Forecast|volume=12|issue=3|pages=428–37|doi=10.1175/1520-0434(1997)012<0428:COCTGL>2.0.CO;2|bibcode = 1997WtFor..12..428P|year=1997 |doi-access=free}}</ref>

[[Luminosity]] has been reported in the past and is probably due to misidentification of external light sources such as lightning, city lights, and [[power flash]]es from broken lines, as internal sources are now uncommonly reported and are not known to ever have been recorded. In addition to winds, tornadoes also exhibit changes in atmospheric variables such as [[temperature]], [[moisture]], and [[atmospheric pressure]]. For example, on June 24, 2003, near [[Manchester, South Dakota]], a probe measured a {{convert|100|mbar|hPa inHg|adj=on|lk=on}} pressure decrease. The pressure dropped gradually as the vortex approached then dropped extremely rapidly to {{convert|850|mbar|hPa inHg|abbr=on|lk=on}} in the core of the violent tornado before rising rapidly as the vortex moved away, resulting in a V-shape pressure trace. Temperature tends to decrease and moisture content to increase in the immediate vicinity of a tornado.<ref name="Manchester">{{cite conference|first1=Julian J.|last1=Lee|first2=Timothy P.|last2=Samaras|first3=Carl R.|last3=Young|title=Pressure Measurements at the ground in an F-4 tornado|book-title=Preprints of the 22nd Conf. Severe Local Storms|publisher=American Meteorological Society|date=2004-10-07|location=Hyannis, Massachusetts|url=http://ams.confex.com/ams/11aram22sls/techprogram/paper_81700.htm|access-date=2007-07-06|archive-date=2011-06-09|archive-url=https://web.archive.org/web/20110609164901/http://ams.confex.com/ams/11aram22sls/techprogram/paper_81700.htm|url-status=live}}</ref>