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What are weather fronts? Warm front, cold front? | Weather Wise S1E10

blue spiky lines red bumpy lines we see

these on our weather maps all the time

but what are these fronts and what do

they mean for our weather as the

atmosphere flows are on the planet it

tends to do so in large air masses each

of which has a fairly uniform conditions

of temperature and humidity at the

boundaries between these air masses that

we find weather fronts if a cold dry air

mass pushes into a warm humid airmass we

have a cold front and as the colder

denser air advances it forms a steep

wedge that forces the warm air in its

path upward very quickly clouds form

right at the front this typically

produces very abrupt sometimes very

intense active weather if a warm humid

air mass pushes into a cool drier air

mass we have a warm front with warm air

overtaking cooler denser air the warm

air is forced upward but at a much

gentler slope than with a cold front

this produces widespread cloud of

precipitation along the front and just

ahead of it and as the warm humid air

flows further up that gentle slope it

results in mid-level clouds ahead of the

active weather cirrus clouds far out in

front we don't necessarily need moving

air masses though if there is an abrupt

boundary between two air masses but

neither is intruding into the other

space we have a stationary front this

can result in the same kind of weather

associated with a warm front but which

can last for much longer sometimes for

days at a time and finally there's the

case of the occluded front where the

Front's themselves push into one another

as a fast moving cold front overtakes a

slower moving warm front as the two

fronts meet the warm air between them is

pushed upward but the denser air behind

the cold front

also wedges the cool air ahead of the

warm front upwards to lifting the entire

boundary between cool and warm air

completely off the ground due to the

combo of cold front and warm front

conditions this often results in a

combination of the weather from both as

well producing active sometimes severe

weather along the occlusion so this

wraps up season 1 as we've gone through

all the basics of weather from why we

have it to the individual components and

how they come together to produce our

active weather in season 2 we're going

to focus in on the action to talk about

thunderstorms lightning tornadoes

hurricanes and other extremes as we all

become a bit more weather wise