GEOG 111 1st Edition Lecture 28 Outline of Last Lecture I Wave cyclones a Where do they occur Outline of Current Lecture I Types of weather around wave cyclones II Stages of development III Cyclone tracks Current Lecture I Types of weather around wave cyclones a Counterclockwise circulation of air b Fronts move with the flow because winds are pushing on the front c Everything s moving downstream West to East d Cool air is behind blue triangles while warm air is behind red semi circles e Precipitation i Along and ahead of fronts ii Center of cyclone iii Types 1 Overrunning light and steady air is stable 2 Cold frontal heavy and more showers higher rates of precipitation air rises to a higher level in the column air is unstable 3 Wrap around around center of cyclone f When there is a front there will always be a temperature inversion i Cooler air beneath relatively warmer air g More stable aloft along warm front i Thin layer of clouds forms along warm front ii Less steep front II Stages of development a Front develops a preexisting stationary front i Indicated by alternated triangles and half circles ii Warm air to south cold air to the north iii Weak area of low pressure develops on front b Wave develops i Low pressure continues developing ii More of a cyclonic motion iii Front has a wave motion c Cyclonic circulation established These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute i Cyclone is maturing ii Pressure continues to get lower iii Pressure gradient increases 1 Winds are getting stronger d Circulation begins i Cold front is always behind or along warm front e Occluded front develops i Cold front has caught up with warm front ii Occurs as the cyclone deepens iii Warm air is lighter less dense so it gets pushed up this uplift causes Cold Frontal precipitation 1 Stronger cyclones in the winter time when Jet Stream is strongest 2 Jet stream closest to our area January early March a When weather is changing the most f Cyclone dissipates i Cold warm fronts don t really exist III Cyclone tracks a Controlled by jet stream position b Mainly talking about active time of year Winter time c Three general tracks i The Alberta Clipper 1 Form most often in Alberta region of Canada 2 Fast moving 3 Produce light precipitation near track 4 Far away from bodies of water relatively dry system 5 NC generally on warm dry side of cyclone
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