Science / Weather / Warm Front: The leading edge of an advancing warm air mass that is replacing a retreating relatively colder air mass. Generally, with the passage of a warm front, the temperature and humidity increase, the pressure rises, and although the wind shifts (usually from the southwest to the northwest in the Northern Hemisphere), it is not as pronounced as with a cold frontal passage. Precipitation, in the form of rain, snow, or drizzle, is generally found ahead of the surface front, as well as convective showers and thunderstorms. Fog is common in the cold air ahead of the front. Although clearing usually occurs after passage, some conditions may produced fog in the warm air.
Front Adjective Synonyms: frontage, forefront
Front Verb Synonyms: face, facade, facing, fore-part, anterior, obverse
Front Noun Synonyms: beginning, head, fore, vanguard, forefront, van
Warm Verb Synonyms: ardent, enthusiastic, earnest, eager, sincere
Warm Noun Synonyms: heat (up), warm up or over
Science / Weather / Occluded Front: Also known as an occlusion, it is a complex front formed when a cold front overtakes a warm front. It develops when three thermally different air masses conflict. The type of frontal boundary they cre MORE
Science / Weather / Pre-Frontal Trough: An elongated area of relatively low pressure preceding a cold front that is usually associated with a shift in wind direction. MORE