Chapter 18 Images
Supplemental images used in lecture
Thunderstorm images: #1, #2, #3, #4, #5
A great picture of mammatus clouds. Where would you find these relative to the updraft of the storm?
Satellite animation of thunderstorm (convective) development on a cold front in South Dakota. Note the presence of multiple updrafts (we are seeing the overshooting top from above). Also note the large area of cirrus cloud cover that is transported downstream (northeastward). At what height are these cirrus?
Airmass (single-cell) thunderstorm pictures: #1, #2. Consider the symmetry of the anvil about the updraft, why does this happen?
A satellite animation of an airmass thunderstorm. Notice how the anvil spreads out relative to the overshooting top (the updraft).
A radar loop of a squall line approaching the St. Louis metro area. Notice the line of high reflectivity associated with the "convective region", with a larger area of widespread rain behind (the "stratiform region").
Radar imagery showing the vertical cross-section of a "bright band" in reflectivity in the stratiform region of a squall line. Why does this exist?
Gust front pictures: #1, #2, #3, #4, #5, #6. Where is the cold air and warm air in each of these pictures? Where is air ascending?
A picture of straight-line wind damage from a thunderstorm outflow.
A time-lapse video of an LP (low precipitation) supercell over Ft. Cobb, Oklahoma. Note the strong rotation about the vertical axis - what processes create this rotation? Also note a small area of scud clouds that develop underneath the updraft (courtesy Kevin McGrath (http://www.mcgrathimages.com))
Reflectivity still and animation of radar reflectivity from the 3 May 1999 Oklahoma City tornado (pic) case. The "hook echo" shows up very well in this example. Where is the updraft? Where is the heaviest precip (e.g., largest hail)?
Animation of radial wind velocity from the same case. Note the strong velocity couplet (reds next to greens) where we saw the hook echo in reflectivity.
