To start this monthly edition, check out those two swirls above — the one on the left, a remnant MCV (mesoscale convective vortex, or spinning thunderstorm system) over the desert of Arizona, resembled a weakening eastern Pacific ex-hurricane moving over colder water, and then there was one of those (Fernanda, on the right).

Speaking of Fernanda… When it was a hurricane, at sunrise:

In the Gulf of Mexico, Tropical Storm Emily spun up relatively suddenly.  It was interestingly a distinct entity while nevertheless still being involved with a non-tropical frontal system.

Farther east, way out in the Atlantic, Tropical Depression Four and a whole lotta dust.

At one point, when zooming in and adding color to a visible/IR combo satellite image, TD4 had a wild appearance with its deep convection surrounded by cirrus filaments.

And on a gray scale image, can you see the freaky face?

These were tropical cyclones having a Fujiwhara interaction in the western Pacific.

This curious little system was up in mid latitudes and not a tropical cyclone, but looked like a sheared one with thunderstorms blown to the east of a low-level center.

Even farther north, a vivid hook echo with a supercell thunderstorm in Manitoba, Canada.

A long-lived thunderstorm system which produced an intense derecho, as seen with GOES-16.

Check out this @UWCIMSS detailed #GOES16 IR loop of the derecho last week that doused SD and and other parts of the midwest. pic.twitter.com/5WnOYNTovF

— UW-Madison SSEC (@UWSSEC) July 26, 2017

Finally, multiple “undular bores” overlapping each other!

Crazy wavy over Lake Superior today as seen by #GOES16 [prelim non-op from @CODMeteorology] #miwx pic.twitter.com/uyaKEIKwAD

— Stu Ostro (@StuOstro) July 11, 2017