I’m estimating this young developing Mesocyclone is 50 miles distant/ 50 miles wide. Relatively small for a Rotating mesocyclone. It was growing at the time. The sunset for that day is ongoing exactly behind the rain shaft so the bottom of the storm is pretty much backlit as well as your going to see through one. There are just plain intense downpours under these storms sometimes. Depending on how fast they are moving makes you lucky or flooded locally lol. These only rain on a few percent of the ground area up here. Spotty! The ground under them becomes totally soaked if the storm doesn’t move.
We had a summer Mesocyclone years back that sat over us and dumped 4.5 inches of rain in 45 minutes. Water was sheet washing down the hill behind my home and skirting around the house. Almost nothing got in but that slope was angle deep in sheet wash. I have since re-landscapes using mounds to redirect any potential sheet wash off the long hill to our back. It’s only been a problem once in 20 years.
That was a rough storm. Tragically a local cowboy from a nearby ranch was killed in that storm. A truck full of locals went out to see what the 100 year water dump did, drove to one of their herds to check them, road was fine. Drove back the road had washed out. That cowboy was a passenger in that truck. County Emergency Management called me to close the road off from my side of the washout. The runoff went through a major country road that literal gully washer did. It was a major culvert to replace and a big job. We couldn’t get to the highway from that road for a while.
Location: Bliss Dinosaur Ranch, Wyoming/Montana borderlands.
Title: Mesocyclone Incoming