PPT-Mesoscale Convective Systems and Squall Line Formation

Crystal K Williams Department of GeographyGeology Illinois State University Outline IntroductionBackground Mesoscale Convective Systems Squall Lines Precipitation Conclusions Introduction. Robert A. Houze, Jr.. University of Washington. ASR Science Team Meetings, Bethesda, 20 November 2014 . Mesoscale Convective Systems. 1. 2. 3. From space. Frequency of MCS anvils over tropics. Yuan and Houze 2010. Kristen . Lani. Rasmussen. Robert A. Houze, Jr. . ICAM 2013, . Kranjska. Gora, June 6th. Convective . “. h. ot spots. ”. occur near major mountain ranges (. Zipser. et al. 2006). Most Intense Thunderstorms on Earth. 30. th. AMS Conference on Hurricanes and Tropical Meteorology. Matthew A. Janiga and Chris D. Thorncroft. University at Albany, SUNY. Niamey. Bamako. 500 km. Adapted from Fink and Reiner (2003). Squall Line Generation. Loosely defined: A line of either ordinary cells or supercells of finite length (10- hundreds of km) that may contain a stratiform rain region either behind, parallel to, or ahead of the convective line.. Convective Systems. book sources. :. Markowski. and Richardson (2009), chapter . 10. Houze 1993: . Cloud Dynamics. , chapter . 9. MCS comet modules:. MCSs: squall lines and bow echoes . (. unnarrated. Brian Mapes . for MPO 663. This Afternoon: A 50 percent chance of showers and thunderstorms. Some of the storms could produce small hail, gusty winds, and frequent lightning. Partly sunny, with a high near 86. Breezy, with a south wind around 17 mph, with gusts as high as 23 mph. O. stratiform. precipitation: Calculations with a high-resolution numerical . model. Yang, M.-J., and R. A. . Houze. , Jr., 1996: . . Momentum . budget of a squall line with . trailing . Convective Systems . 2. Weather Systems – Fall 2015. Outline:. . Bow Echoes, . Derechos. and . Mesoscale. Convective Vortices. Previously …. We looked at the effects that cold pools and vertical wind shear can have on the tilt, intensity, and structure of squall lines. http://www.ucar.edu/communications/factsheets/Tornadoes.html. Packet#1. What is meant by “Mesoscale Meteorology”?. ATMS 316- Mesoscale Meteorology. http://www.ucar.edu/communications/factsheets/Tornadoes.html. ATM 419. Spring 2016. Fovell. 1. Definition of . “. squall line. ”. Glossary of Meteorology. (2000):. . “. a line of active thunderstorms, either continuous or with breaks, including contiguous precipitation areas resulting from the existence of thunderstorms.. Convective Systems 1. Weather Systems – Fall 2015. Outline:. . definitions and dynamics. Definition. Isolated T-storms. are generally classified as one of three types: ordinary cells, multi-cell, or . Angela Rowe and Robert . Houze. , Jr.. University of Washington. ASR Fall Working Groups. AMIE/MJO Breakout. November . 2013. Rockville, MD. S-. PolKa. Zuluaga. and . Houze. (2013). 6. 7. 8. 1. 2. 3. 2. (Squall line structure and hands-on demo). ATM 419/563. Spring 2017. Fovell. 1. Definition of . “. squall line. ”. Glossary of Meteorology. (2000):. . “[A]. . line of active thunderstorms, either continuous or with breaks, including contiguous precipitation areas resulting from the existence of thunderstorms. Courtney Schumacher for Brian’s mesoscale . class. First tropical radar bright band. Murty. et al. (1965). African squall line evolution. Chong et al. (1987). African squall line (mature stage). Chong et al. (1987).