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                   Wednesday, April 20, 2016

Plains storm chase forecast update No. 6: for April 20

By DAN ROBINSON
Storm Chaser/Photographer
25 Years of Storm Chasing
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Long-range models (GFS and Euro) have been showing a dominant western troughing pattern and in-place deep surface moisture to finally emerge by this weekend. This pattern, if it materializes as shown, would mean the first Great Plains expedition(s) of the season are likely in the coming weeks. As the larger trough sits out west, it will be poised to send occasional "shortwave" impulses across the Plains, each which has the potential to produce an outbreak-type scenario.


GFS model 500mb winds forecast for Wednesday, April 27

All in all, I am fairly optimistic that the first Plains expedition will happen before the end of April.

The following table charts the probability of a Great Plains chase expedition happening during several indicated date ranges in the near future:

2016 Plains Chase Expeditions - Probabilities as of April 20
April 20-2415%
April 25-3060%
May 1-530%

The following comments were posted before this site switched to a new comment system on August 27, 2016:

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