A March splendor, this supercell moved slowly ENE from near Rocky OK to N of Gotebo and beyond, almost reaching Oklahoma City well after dark, then being entrained around another, later-developing supercell. The relatively slow storm motion and outstanding cloud definitions reminded us of a June storm, and was a welcome break from the frantic chases and brief observing stops that typically … [Read more...]
Rocky Hailer
Rounded, striated, tiered storm structures, often known as "stacks of plates", are a common visual characteristic of dryline supercells like this, where low clouds or rain often don't interfere with viewing from the inflow region. Notice the strong resemblance of the Rocky storm here to the "flipped" version of the Aroya anticyclonic supercell from several years before in Colorado. I surely did, … [Read more...]
Splitting Storm: Part 2
See Part 1 for an earlier stage of the storm-splitting process, as seen from the same spot. In this case, the resulting mirror-image supercells both survived; but as usually happens, the right split had access to stronger storm-relative inflow and shear, and lasted longer. Another (cyclonic) supercell would develop from the separate anvil cloud in the distant left, becoming our primary target … [Read more...]
Splitting Storm: Part 1
Many supercells split, especially early in their lifetimes. The faint but growing crack in the cloud material, above a small rain core and the center of the storm's collective base, reveals this. Even though this storm started small, it had no problem dividing itself in two like some giant protozoan, thanks to surrounding winds that supported both leftward and rightward moving storms. The … [Read more...]
Outflow through an Outhouse
One round of outflow already had whistled through this forlorn and forgotten little latrine, courtesy of an HP supercell passage north of here and into the Little Snowy Range. Here comes another! The majesty of the land and sky of central Montana, where the Great Plains and the northern Rockies intersperse in a topographic tapestry nearly as complex as the atmosphere above, belies the simple and … [Read more...]
Winter Survival
Mostly buried by the first substantial snow of the season, a vine kept one leaf out of its gelid blanket to continue photosynthesizing a modicum of food for itself. Fortunately these plants contain enough natural antifreeze such that one little snow wasn't about to finish its lifespan. Norman OK (6 Dec 13) Looking N … [Read more...]
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