We received the following email from Ken Waters of the National Weather Service forecast office in Phoenix, Arizona:
I noticed something interesting in this morning’s visible imagery off the Baja California coast.
I’m looking at the apparent wave pattern that’s going “upstream” towards the northeast whereas the low level flow is mostly towards the south. Is that a gravity wave? If so, what causes it? The vis can only go so far back so I looked at the IR and couldn’t find anything obvious.
Great question Ken — it certainly appears to be some sort of internal gravity wave, but what caused it and why was it propagating against the ambient flow shall remain a bit of a mystery until we can dig into this case a bit further. One more event for the “What the heck is this?” blog category.
Read more... http://cimss.ssec.wisc.edu/goes/blog/archives/9166