![Page 1: Class%3:%Synop-c%Fronts% - MIT PAOCpaoc.mit.edu/synoptic/courses/12.310/assign3/Casey_class3_2015.pdf · WPC%forecastfor%Sunday%morning% maturecyclone,-featuringan-occludedfront developing-cyclone-](https://reader034.vdocuments.site/reader034/viewer/2022052608/5a7ba4ee7f8b9a563b8c42bc/html5/thumbnails/1.jpg)
Class 3: Synop-c Fronts
twisterdata.com Valid 1-‐16-‐15 12Z
![Page 2: Class%3:%Synop-c%Fronts% - MIT PAOCpaoc.mit.edu/synoptic/courses/12.310/assign3/Casey_class3_2015.pdf · WPC%forecastfor%Sunday%morning% maturecyclone,-featuringan-occludedfront developing-cyclone-](https://reader034.vdocuments.site/reader034/viewer/2022052608/5a7ba4ee7f8b9a563b8c42bc/html5/thumbnails/2.jpg)
Typical mid-‐life low pressure system
Mature low pressure system
ww2010.atmos.uiuc.edu
crh.noaa.gov
![Page 3: Class%3:%Synop-c%Fronts% - MIT PAOCpaoc.mit.edu/synoptic/courses/12.310/assign3/Casey_class3_2015.pdf · WPC%forecastfor%Sunday%morning% maturecyclone,-featuringan-occludedfront developing-cyclone-](https://reader034.vdocuments.site/reader034/viewer/2022052608/5a7ba4ee7f8b9a563b8c42bc/html5/thumbnails/3.jpg)
WPC forecast for Sunday morning
mature cyclone, featuring an occluded front
developing cyclone
![Page 4: Class%3:%Synop-c%Fronts% - MIT PAOCpaoc.mit.edu/synoptic/courses/12.310/assign3/Casey_class3_2015.pdf · WPC%forecastfor%Sunday%morning% maturecyclone,-featuringan-occludedfront developing-cyclone-](https://reader034.vdocuments.site/reader034/viewer/2022052608/5a7ba4ee7f8b9a563b8c42bc/html5/thumbnails/4.jpg)
Why do we care about where fronts are, and where they’re moving?
ü Temperature changes (oHen rapid)
ü Moisture changes ü Wind shiH ü UpliHing air à clouds and oHen precipita-on
![Page 5: Class%3:%Synop-c%Fronts% - MIT PAOCpaoc.mit.edu/synoptic/courses/12.310/assign3/Casey_class3_2015.pdf · WPC%forecastfor%Sunday%morning% maturecyclone,-featuringan-occludedfront developing-cyclone-](https://reader034.vdocuments.site/reader034/viewer/2022052608/5a7ba4ee7f8b9a563b8c42bc/html5/thumbnails/5.jpg)
Typical cold front wind shiA
![Page 6: Class%3:%Synop-c%Fronts% - MIT PAOCpaoc.mit.edu/synoptic/courses/12.310/assign3/Casey_class3_2015.pdf · WPC%forecastfor%Sunday%morning% maturecyclone,-featuringan-occludedfront developing-cyclone-](https://reader034.vdocuments.site/reader034/viewer/2022052608/5a7ba4ee7f8b9a563b8c42bc/html5/thumbnails/6.jpg)
Typical cold front wind shiA
![Page 7: Class%3:%Synop-c%Fronts% - MIT PAOCpaoc.mit.edu/synoptic/courses/12.310/assign3/Casey_class3_2015.pdf · WPC%forecastfor%Sunday%morning% maturecyclone,-featuringan-occludedfront developing-cyclone-](https://reader034.vdocuments.site/reader034/viewer/2022052608/5a7ba4ee7f8b9a563b8c42bc/html5/thumbnails/7.jpg)
Passage of a cold front in Boston late Monday/early Tuesday…
temperature drop
wind shiA 1/12/15
![Page 8: Class%3:%Synop-c%Fronts% - MIT PAOCpaoc.mit.edu/synoptic/courses/12.310/assign3/Casey_class3_2015.pdf · WPC%forecastfor%Sunday%morning% maturecyclone,-featuringan-occludedfront developing-cyclone-](https://reader034.vdocuments.site/reader034/viewer/2022052608/5a7ba4ee7f8b9a563b8c42bc/html5/thumbnails/8.jpg)
![Page 9: Class%3:%Synop-c%Fronts% - MIT PAOCpaoc.mit.edu/synoptic/courses/12.310/assign3/Casey_class3_2015.pdf · WPC%forecastfor%Sunday%morning% maturecyclone,-featuringan-occludedfront developing-cyclone-](https://reader034.vdocuments.site/reader034/viewer/2022052608/5a7ba4ee7f8b9a563b8c42bc/html5/thumbnails/9.jpg)
Cold fronts are oHen associated with squall lines (thunderstorms or snow showers).
![Page 10: Class%3:%Synop-c%Fronts% - MIT PAOCpaoc.mit.edu/synoptic/courses/12.310/assign3/Casey_class3_2015.pdf · WPC%forecastfor%Sunday%morning% maturecyclone,-featuringan-occludedfront developing-cyclone-](https://reader034.vdocuments.site/reader034/viewer/2022052608/5a7ba4ee7f8b9a563b8c42bc/html5/thumbnails/10.jpg)
Warm fronts are associated with a wide swath of steadier precipita-on.
![Page 11: Class%3:%Synop-c%Fronts% - MIT PAOCpaoc.mit.edu/synoptic/courses/12.310/assign3/Casey_class3_2015.pdf · WPC%forecastfor%Sunday%morning% maturecyclone,-featuringan-occludedfront developing-cyclone-](https://reader034.vdocuments.site/reader034/viewer/2022052608/5a7ba4ee7f8b9a563b8c42bc/html5/thumbnails/11.jpg)
![Page 12: Class%3:%Synop-c%Fronts% - MIT PAOCpaoc.mit.edu/synoptic/courses/12.310/assign3/Casey_class3_2015.pdf · WPC%forecastfor%Sunday%morning% maturecyclone,-featuringan-occludedfront developing-cyclone-](https://reader034.vdocuments.site/reader034/viewer/2022052608/5a7ba4ee7f8b9a563b8c42bc/html5/thumbnails/12.jpg)
![Page 13: Class%3:%Synop-c%Fronts% - MIT PAOCpaoc.mit.edu/synoptic/courses/12.310/assign3/Casey_class3_2015.pdf · WPC%forecastfor%Sunday%morning% maturecyclone,-featuringan-occludedfront developing-cyclone-](https://reader034.vdocuments.site/reader034/viewer/2022052608/5a7ba4ee7f8b9a563b8c42bc/html5/thumbnails/13.jpg)
Recent Weather
![Page 14: Class%3:%Synop-c%Fronts% - MIT PAOCpaoc.mit.edu/synoptic/courses/12.310/assign3/Casey_class3_2015.pdf · WPC%forecastfor%Sunday%morning% maturecyclone,-featuringan-occludedfront developing-cyclone-](https://reader034.vdocuments.site/reader034/viewer/2022052608/5a7ba4ee7f8b9a563b8c42bc/html5/thumbnails/14.jpg)
![Page 15: Class%3:%Synop-c%Fronts% - MIT PAOCpaoc.mit.edu/synoptic/courses/12.310/assign3/Casey_class3_2015.pdf · WPC%forecastfor%Sunday%morning% maturecyclone,-featuringan-occludedfront developing-cyclone-](https://reader034.vdocuments.site/reader034/viewer/2022052608/5a7ba4ee7f8b9a563b8c42bc/html5/thumbnails/15.jpg)
![Page 16: Class%3:%Synop-c%Fronts% - MIT PAOCpaoc.mit.edu/synoptic/courses/12.310/assign3/Casey_class3_2015.pdf · WPC%forecastfor%Sunday%morning% maturecyclone,-featuringan-occludedfront developing-cyclone-](https://reader034.vdocuments.site/reader034/viewer/2022052608/5a7ba4ee7f8b9a563b8c42bc/html5/thumbnails/16.jpg)
![Page 17: Class%3:%Synop-c%Fronts% - MIT PAOCpaoc.mit.edu/synoptic/courses/12.310/assign3/Casey_class3_2015.pdf · WPC%forecastfor%Sunday%morning% maturecyclone,-featuringan-occludedfront developing-cyclone-](https://reader034.vdocuments.site/reader034/viewer/2022052608/5a7ba4ee7f8b9a563b8c42bc/html5/thumbnails/17.jpg)
![Page 18: Class%3:%Synop-c%Fronts% - MIT PAOCpaoc.mit.edu/synoptic/courses/12.310/assign3/Casey_class3_2015.pdf · WPC%forecastfor%Sunday%morning% maturecyclone,-featuringan-occludedfront developing-cyclone-](https://reader034.vdocuments.site/reader034/viewer/2022052608/5a7ba4ee7f8b9a563b8c42bc/html5/thumbnails/18.jpg)
![Page 19: Class%3:%Synop-c%Fronts% - MIT PAOCpaoc.mit.edu/synoptic/courses/12.310/assign3/Casey_class3_2015.pdf · WPC%forecastfor%Sunday%morning% maturecyclone,-featuringan-occludedfront developing-cyclone-](https://reader034.vdocuments.site/reader034/viewer/2022052608/5a7ba4ee7f8b9a563b8c42bc/html5/thumbnails/19.jpg)
![Page 20: Class%3:%Synop-c%Fronts% - MIT PAOCpaoc.mit.edu/synoptic/courses/12.310/assign3/Casey_class3_2015.pdf · WPC%forecastfor%Sunday%morning% maturecyclone,-featuringan-occludedfront developing-cyclone-](https://reader034.vdocuments.site/reader034/viewer/2022052608/5a7ba4ee7f8b9a563b8c42bc/html5/thumbnails/20.jpg)
![Page 21: Class%3:%Synop-c%Fronts% - MIT PAOCpaoc.mit.edu/synoptic/courses/12.310/assign3/Casey_class3_2015.pdf · WPC%forecastfor%Sunday%morning% maturecyclone,-featuringan-occludedfront developing-cyclone-](https://reader034.vdocuments.site/reader034/viewer/2022052608/5a7ba4ee7f8b9a563b8c42bc/html5/thumbnails/21.jpg)
![Page 22: Class%3:%Synop-c%Fronts% - MIT PAOCpaoc.mit.edu/synoptic/courses/12.310/assign3/Casey_class3_2015.pdf · WPC%forecastfor%Sunday%morning% maturecyclone,-featuringan-occludedfront developing-cyclone-](https://reader034.vdocuments.site/reader034/viewer/2022052608/5a7ba4ee7f8b9a563b8c42bc/html5/thumbnails/22.jpg)
![Page 23: Class%3:%Synop-c%Fronts% - MIT PAOCpaoc.mit.edu/synoptic/courses/12.310/assign3/Casey_class3_2015.pdf · WPC%forecastfor%Sunday%morning% maturecyclone,-featuringan-occludedfront developing-cyclone-](https://reader034.vdocuments.site/reader034/viewer/2022052608/5a7ba4ee7f8b9a563b8c42bc/html5/thumbnails/23.jpg)
![Page 24: Class%3:%Synop-c%Fronts% - MIT PAOCpaoc.mit.edu/synoptic/courses/12.310/assign3/Casey_class3_2015.pdf · WPC%forecastfor%Sunday%morning% maturecyclone,-featuringan-occludedfront developing-cyclone-](https://reader034.vdocuments.site/reader034/viewer/2022052608/5a7ba4ee7f8b9a563b8c42bc/html5/thumbnails/24.jpg)