Andrew Stoller
EF5
Very active high plains setup looks probable Wendsday; it will be a classic day 2 post frontal passage high plains setup in northeast CO, southeast WY where frontal passage and surface return flow pulls in 50+ degree dewpoints. There will also be decent southwesterly 500mb flow from a closed low over the southwest US providing 40+ knots of deep layer sheer. Hodographs look good with easterly surface winds thanks to the front and southwest winds aloft thanks to the closed upper low. The setup is similar to other events that produced noteworthy tornadoes like the Goshen County WY tornado of 2009 which I believe was also a post cold front scenario where the front and associated easterly surface winds pulled in moisture into the orographic prone area of the Larime range in WY. That, along with the Cheyenne ridge and the Palmer divide can produce additional lift depending on exactly where the front stalls out.
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