
1) Convivial figurehead 2) Pleasant mass of air 3) Southern facade 4) Weather front
Found on
https://www.crosswordclues.com/clue/warm-front

A warm front is a density discontinuity located at the leading edge of a homogeneous warm air mass, and is typically located on the equator-facing edge of an isotherm gradient. Warm fronts lie within broader troughs of low pressure than cold fronts, and move more slowly than the cold fronts which usually follow because cold air is denser and less ...
Found on
http://en.wikipedia.org/wiki/Warm_front

A boundary between a warm airmass that is replacing a cooler airmass.
Found on
http://ggweather.com/glossary.htm

The forward edge of an advancing warm air mass that is displacing cooler air in its path.
Found on
http://nsidc.org/arcticmet/glossary/warm_front.html

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 col...
Found on
http://www.avon-weather.com/glossary.html

The boundary between two different air masses where warm air pushes cold air away to bring warmer weather.
Found on
http://www.bbc.co.uk/weather/weatherwise/glossary/w.shtml

(from the article `extratropical cyclone`) Typical weather sequences are associated with extratropical cyclones. Stations ahead of the approaching front side of the wave, called the warm ... ...As depicted in the cyclonic circulation stage (C), the front that signals the advancing cold air (cold front) is indicated by the triangles, whi...
Found on
http://www.britannica.com/eb/a-z/w/10

Characteristics are 500 to 600 miles between the ground edge and the sloping into the sky edge, high cirrus clouds developing to form nimbostratus clouds and continuous rain.
Found on
http://www.encyclo.co.uk/local/20160

A narrow transitions zone separating advancing warmer air from retreating cooler air. The air behind a warm front is warmer and typically more humid than the air it is replacing.
Found on
http://www.encyclo.co.uk/local/22268

The leading edge of a mass of warmer air that displaces a mass of colder air.
Found on
http://www.metcheck.com/OTHER/glossary.asp

A transition zone in the atmosphere where an advancing warm air mass displaces a cold air mass.
Found on
http://www.physicalgeography.net/physgeoglos/w.html

A leading boundary of a warm airmass that is often moving into an area influenced by a cooler airmass.
Found on
http://www.stormfax.com/wxwords.htm

A narrow transitions zone separating advancing warmer air from retreating cooler air. The air behind a warm front is warmer and typically more humid than the air it is replacing In Canada, it is defined as the trailing edge of a retreating cold air mass and moves in such a way that the warmer air replaces the colder air.
Found on
http://www.timeanddate.com/weather/glossary.html

[
n] - the front of an advancing mass of warmer air
Found on
http://www.webdictionary.co.uk/definition.php?query=warm%20front

The interface between a warm air mass and the cold air mass it is overtaking; the warm air tends to push up over the denser cold air and become cooler, which results in the formation of clouds and eventually precipitation.
Found on
https://academy.allaboutbirds.org/bird-academys-a-to-z-glossary-of-bird-ter

The forward edge of an advancing warm air mass that is rising over cooler air in its path.
Found on
https://geographyfieldwork.com/GeographyVocabularyGCSEClimate.htm

the forward edge of an advancing warm air mass that is displacing cooler air in its path.
Found on
https://nsidc.org/cryosphere/glossary?page=28

A body of warm air advancing over a mass of cold air. Being forced upwards, it expands. Its moisture tends to condense in the lower temperatures at height, clouds form and rain is likely to fall.
Found on
https://www.encyclo.co.uk/local/20784
noun the front of an advancing mass of warmer air
Found on
https://www.encyclo.co.uk/local/20974

The transition zone where a warm air mass overtakes and replaces a colder air mass.
Found on
https://www.encyclo.co.uk/local/22280
No exact match found.