WAtmospheric electricity
WAurora
WDawn chorus (electromagnetic)
WDielectric barrier discharge
WElectric discharge
WElectroluminescence
WElectroluminescent display
WElectronic properties of graphene
WFerranti effect
WGround bounce
WHeat lightning
WHiss (electromagnetic)
WHuman-body model
WKirlian photography
WLightning
WNarrow bipolar pulse
WPhotoelectric effect
WPiezoelectric speaker
WPiezoelectricity
WPower flash
WPyroelectricity
WRadio atmospheric
WRelativistic runaway electron avalanche
WSprite (lightning)
WSt. Elmo's fire
WSteve (atmospheric phenomenon)
WStreamer discharge
WTriboelectric effect
WUpper-atmospheric lightning
WVolcanic lightning
WWhistler (radio)