$2000 Semi-Custom Rifle from PVA in 6mm Dasher or 6BR –Patriot Valley Arms makes a rifle called the “John Hancock” that is a steal of a deal. It’s semi-custom, meaning you don’t get to pick every detail (like it’s only offered in a few chamberings) … but is as high ...
air with positive vorticity is advected ahead of its axis in the process known as positive vorticityadvection, usually abbreviated to PVA. Thus, to identify areas of PVA when forecasting, look on the upper air charts for approaching upper Longwave or Shortwave troughs: PVA will be at its most...