Tag: south dakota

30 Sep

July 18, 2018 – Lake Andes, South Dakota

stratosigma / Blog, Storm Chasing / / Comments

July 18th was another after-work chase day. The SPC had outlined a 5% tornado risk from Murdo, SD to Columbus, NE as a surface warm front was forecast to be draped across southern South Dakota. Scattered storms were expected along and south of the boundary. 
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23 Sep

June 8, 2018 – Black Hills, South Dakota

stratosigma / Blog, Storm Chasing / / Comments

The final day of my 2018 chase vacation and it appeared that there might be a decent shot at some gorgeous storms in the Black Hills area of western South Dakota. I spent the previous night in Spearfish and sat around there for most of the morning waiting to see if I’d need to move south or not. 
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21 Nov

June 13, 2017 – South Dakota Tornado

stratosigma / Blog, Storm Chasing / / Comments

After a moderately successful chase in the high plains on the 12th, another potential significant day followed. As a closed mid-level low rotated across Montana and Wyoming into the Northern Plains, a trough lagged behind that was forecast to move into the Dakotas during the evening on the 13th. At the surface, a low along the SD/NE border would drift east throughout the day while low 70 dewpoints advected into the warm sector in eastern South Dakota.
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17 May

May 17, 2013 – Winner, South Dakota

stratosigma / Blog, Storm Chasing / / Comments

The 17th was day 1 of a 4 day chase excursion. A broad upper trough was working its way onshore across the western states and this was the first day its influence could be felt in the Plains. I had driven out from Michigan the day before and spent the night in Sioux Falls, SD. The plan was to play south-central South Dakota for the slight opportunity at supercells and maybe a tornado.
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02 Jun

June 2, 2011 – Beautiful South Dakota

stratosigma / Blog, Storm Chasing / / Comments

Ah, to be in South Dakota again! A strong trough was expected to move from the Rockies to the Northern Plains which would nudge the cold front eastward across the western Dakotas providing focus for storms to my north. Meanwhile a warm front draped from North Dakota down into Iowa and Missouri would provide a focus for storms to my east.  I opted to play the cold front as the warm sector would be flooded with ML CAPE near the 4,000 J/Kg range along with strong low level winds and curved hodographs would set the stage for a potentially decent severe weather threat.
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