Wednesday, June 4, 2014

Supercells and a pesky outflow boundary

Yesterday was supposed to be a major tornado day.  All parameters were in place for a big event, but one thing was not predicted: how the morning storms in South Dakota would affect severe weather chances.  They belched out a large outflow boundary, and it continued to surge south throughout the day.  As storms initiated and became interesting, the outflow would come by and undercut the storms, choking off the available energy.  In return, they would die very quickly.

Anyway, we began the day in Ogallala, NE, which put us in very good position for the day.  After driving to North Platte, NE for a quick lunch, we headed north towards Stapleton, NE where we hung out for a couple hours.  We found an old school house to photograph and then headed to a park.  Basically, we were in "hurry up and wait" mode.  Towers started going up, and we drove south a bit to investigate them.  After
Supercell near Eddyville, NE
finding what appeared to be a good east-west option, we quickly picked another road that did not have road construction.  Again, we sat and waited for something to happen, but the atmosphere wasn't really sure what it wanted to do.  Finally, a beefy tower looked like it would do something, so we blasted south towards Eddyville, NE, and found a desolate road to sit and wait.  The storm was looking organized on radar, and we were hoping that our patience would pay off.  We let the storm come to us, so that we could keep other options open in case it did not pan out.  After a while, the storm began to rotate, and it had decent structure for a while.  And then, it happened.  Cold outflow from the other storms decided to crash the party and kill our cell!!!  Such is the life of our chaser.  Luckily, our day wasn't over, yet.  A cell was going strong in Garden County, NE, west of Ogallala.  It was moving east at 35 mph, so we knew we had a very good chance at intercepting it.  At this point, it was dropping baseballs, and it even tried to produce a tornado a couple of times.  Alas, as we got closer, outflow won again.  We killed another storm!!  After this, we decided to head back east to our hotel for the night and stopped to photograph the
clouds and lightning along the way.  We wound up in Lexington, NE after driving 385 miles.

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