8 June 2018 – Severe Thunderstorms Western South Dakota

This day started with a little more promise than most of the season had to offer.  We woke in Chadron, Nebraska and had a couple of fairly close plays to choose from.  One would be early, isolated supercell development to the northwest of Rapid City, the other would be slightly later storm development near and east of the Pine Ridge Indian Reservation.  We worked our way north to Buffalo Gap where we could observe both areas unfolding to plan.  A supercell was northwest of Rapid City, and towering cumulus clouds were rising to our east.  The Rapid City storm was looking impressive both on radar and visually from our distant vantage point.  But this storm was surrounded by chasers and in a fairly poor road network at the north side of the Black Hills.  We made our decision to run east toward the new development and started along the scenic drive east from Buffalo Gap toward Rocky Ford.

Along the way, storm development in front of us was impressive.  There was steady growth of tall convective towers both visually and on radar, where no pulsing was indicated.  These storms decided it was time to go and they went, chewing nicely on MLCAPE that was around 4500 j/kg.  Our chase ran into a snag just south of Rocky Ford when we were informed that one of our chase party didn’t like the idea of chasing in the Pine Ridge Reservation.  We had to find a quick way out.  Unfortunately, we had already come about half way in.  The decision was made to go north to Scenic – east through the eastern side of the Badlands National Park and meet up with the interstate southeast of Wall.  We would then drive east on I-90 for about an hour to Murdo and head south to see what condition our storms would be in by the time we got there.

Sadly, but not too unexpectedly, what had been discrete supercells had become bowing line segments during our three hour detour.  We made a stop just west of Mission, SD where we got our first good look at the oncoming storms:

Needless to say, with that look, any chance of tornado production had ended and we decided to shift southward and see what lightning could be had.

We made a couple of stops south of Valentine, Nebraska where things were more casual:
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Lightning didn’t cooperate, with most of the cloud to ground strikes staying buried in the heaviest precipitation.  We had some mammatus clouds to view back to our south and east, but this was pretty much the end of the day for us.