Thank you again for all your suggestions. To further clarify my challenge, I used to carry a Olympus SW waterproof snapshot camera (purchased in 2006) for spontaneous storm chase shots after work, etc. I liked the fact it was compact, fit in my pocket, could easily fit on top of the steering wheel as I drove with two hands and shot photos from the car, etc. This camera took exquisitely good daytime storm photos (both land and beach) and fair sunset photos but dusk photos were horrible with grain. Distant horizon lightning photos looked good as well, and one taken from our deck during a cruise looks awesome, even cropped. One cropped lightning photo won best of show in a local art club photo contest. (there was no way to shut down apature width for closer lightning shots). The camera was awesome because I had no fear of salt water spray, heavy rain, could easily stick it out my car window to shoot skies, etc.
In February, the camera disappeared during delivery from mandated valet service luggage to my hotel room (and nobody claimed any knowledge of what could have happened to it.
We will be going to Costa Rica in a month and I would like to replace this camera with a similar, but better low light camera. My hope is that in addition to our vacation, I can utilize this camera in a similar fashion to the prior Olympus upon return from our vacation.
After hours upon hours of researching reviews, two cameras seem to tie for first place: 1) Panasonic Lumix TS5 and 2) Olympus TG. Reviewers mention that the Lumix even has a "starry night" setting which allows for lightning photos. Looking at samples, brightly sunlit Lumix daytime photos seem washed but their sunset photos look great. I would assume storm photos would look as good as the sunset photos. They are also regarded as taking great videos.
Olympus daytime photos look great, but there were complaints about their charging system, video quality, and in some cases photo quality though a couple reviewers tagged it as the #1 best waterproof compact.
The advantage for me regarding this format of camera is its clearly stated waterproof quality ( as opposed to the mirrorless Olympus model Rob posted which is not advertized as waterproof) and the compact size allowing for greater versatility.
Thank you in advance for any further thoughts you might have regarding this.