Frontal Precipitation/weather

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Air Masses, Pressure Systems, and Frontal Boundaries

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Presentation transcript:

Frontal Precipitation/weather

Frontal Precip Interactions between air masses. Relative temperature and humidity. As always, must force air to rise The faster the rise, the faster the cooling, and therefore, the faster the precip

Cold fronts

Characteristics of cold fronts Precip at or behind the front itself Heavy precipitation because of rapid rise of air The faster the front is moving, the steeper the incline and the faster the rise/cool

Warm front

Characteristics of a warm front Relatively slow rise of air Low to moderate precipitation Precip in front of the front itself.

OK. How to tie these together

Current weather http://www.weather.com/maps/currentusweather http://www.weather.com/maps/ustemperaturemap https://www.windyty.com/?38.557,-97.635,5

Convectional precipitation Thunderstorms! Thunder, lightning, hail? Hurricanes Tornados ITCZ Remember, winds spiral INTO low pressure cells.

http://www. thisiscolossal http://www.thisiscolossal.com/2014/05/supercell-thunderstorm-timelapse-over-kansas/

Tornados Associated with intense thunderstorms Extreme low pressure Most – 110mph winds, 250’ across, might go a few miles. Extremes – 300+mph, 2 miles across, might go dozens of miles. No relationship to trailer parks.

https://www.youtube.com/watch?v=XMF22_MEMJU https://www.youtube.com/watch?v=OEN7MTy4fkA https://www.youtube.com/watch?v=IUj9OW_OXmU (really long. But cool) Do a quick google of image multiple tornadoes

Often, multiple funnels “multiple vortex tornadoes”

https://www.youtube.com/watch?v=CpxblAR3Ro0 https://www.youtube.com/watch?v=m54XJsaAwFA

Tornado Alley

http://www. ustornadoes http://www.ustornadoes.com/2013/07/25/from-domestic-to-international- tornadoes-around-the-world/