What is Warm front?
[[File:Warmfrontai.svg|thumb|Illustration of a warm front.]] A '''warm front''' is a leading edge of a warmer [[air mass]] that is advancing into a cooler air mass.<ref>[http://ww2010.atmos.uiuc.edu/(Gh)/guides/mtr/af/frnts/wfrnt/def.rxml Warm Front: transition zone from cold air to warm air]</ref><ref>{{Cite web |url=http://www.ace.mmu.ac.uk/eae/Weather/Older/Warm_Fronts.html |title=Warm Fronts |access-date=2009-08-14 |archive-date=2007-12-26 |archive-url=https://web.archive.org/web/20071226194030/http://www.ace.mmu.ac.uk/eae/Weather/Older/Warm_Fronts.html |url-status=dead }}</ref> Warm fronts usually have [[stratus cloud|stratus]] and [[cirrus cloud|cirrus]] [[clouds]], but sometimes they also have [[cumulus cloud|cumulus]] and [[cumulonimbus cloud|cumulonimbus]] clouds. Before the warm front passes, there can be [[rain]] or [[snow]]. While it is passing, there is often light rain or [[drizzle]]. Warm fronts move more slowly than [[cold front]]s.<ref>[https://www.usatoday.com/weather/tg/wwfront/wwfront.html Warm fronts are not as nice as they sound]{{Dead link|date=September 2021 |bot=InternetArchiveBot |fix-attempted=yes }}</ref> On a [[weather map]] warm fronts are shown as red lines with red [[semicircle]]s pointing in the direction that the front is moving. ==References== {{reflist|2}} [[Category:Meteorology]] {{weather-stub}}