Exam 3 notes - ppt9 15:42 Onppt ppt10 15:42 Missedairmasses...

Info icon This preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon
ppt 9 15:42 On ppt
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
ppt 10 15:42 Missed-air masses
Image of page 2
PPt 11 15:42 Tornadoes  Area of low pressure in which a narrow column or funnel of rotating are  reaches from could to ground (not always reaching the ground) Wins usually (99% of the time) rotate counterclockwise Generally cover a small are (300-1500 ft) Winds can blow up to 500 mph! Some tornadoes are small and some can produce winds up to 500 mph.  The  big ones are the 500 mph winds) Tornadoes can occur at any time day or night Called a funnel cloud until it touches land and then becomes a tornado More about Tornadoes Form w/ thunderstorm (not tropical) Formation-spawned along cold fronts o Requires strong uplift (which a front gives you) o Hail and tornadoes form hand in hand bc both require same dynamics and  strong uplift o Dramatic Environmental Lapse Rate: cold elevation and hot surface o Sharp increase in wind speed w/ altitude o Shearing causes ROLLING MOTION (pencil) this causes tornadoes to  form sideways or parallel to the ground o Forms at 90 degree to surface, overturned by updraft o Rotating cylinder spiral to ground o Doppler Radar: one tool that can measure the shearing we need to get a  tornado produced—helps give watches and warnings.  They issue  warnings if Doppler radar is showing conditions for tornado.  Has helped of  dramatically.  Use to only issue a warning if they saw one touch the ground
Image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
PPt 11 15:42 Pic with formation of tornado: Starts horizontal and thunderstorm turns it vertical bc Coils become crooked  by thunderstorm and it sets them right side up an then becomes a very high  thunderstorm which is a tornado Tornadoes: Debris: tings the tornado sucks up Tornadoes can be skinny or fat  Basic Characteristics Funnel-shaped, 300-1500 ft in diameter Wind Speeds up to 500 mph o No good measurements (Mt Washington has the strongest winds in the  world and we have lab studies that measure them): it usually rips of the  measuring gauge if they have one o Lab studies of impact- est. wind speed o 1931-83 ton RR coach + 117 passengers went airborne for 75 ft o Weak tornadoes last ~3 min and strong about 3 hours  most tornadoes  are weak o Pressure drop is about 10-% from the region o Rotation is usually but not always counterclockwise; some fraction of 1%  do this..corriolous plays some roll but can be overcome Slide after basic characteristics- The Tri state tornado POWERFUL tornado On the ground for 218 mi
Image of page 4
PPt 11 15:42 Killed 297 people Damage was 43 million dollars Table 10-1: The Fujita Scales based on tornado expected damage Major tornado is a F3 Relative Geography
Image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 6
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern