April 2, 2010
Conceptual schematic of the predominant airstreams interacting with California's complex terrain and the associated fractional water vapor fluxes
Conceptual schematic of the predominant airstreams interacting with California's complex terrain and the associated fractional water vapor fluxes.

HMT Publication Notice

A journal article entitled Water Vapor Fluxes and Orographic Precipitation over Northern California Associated with a Landfalling Atmospheric River, by Barrett L. Smith, Sandra E. Yuter, Paul J. Neiman, and D. E. Kingsmill appeared in the January 2010 issue of Monthly Weather Review, 138, 74–100, doi:10.1175/2009MWR2939.1.

This paper presents a detailed water vapor transport budget study in atmospheric river conditions associated with a major storm observed and modeled during HMT-2006. It documents the effects of the coast range and of the Sierra barrier jet in modulating the low-altitude water vapor transport in a major storm. It uses high-resolution modeling and observations from HMT. The work contributes to the understanding of key physical processes that modulate the detailed location and intensity of extreme precipitation. Better understanding of the role of the Sierra barrier Jet in modulating precipitation was a research direction that was recommended during HMT discussions on regional challenges for extreme QPF at the California-Nevada River Forecast Center. It supports HMT's QPF Major Activity Area. The research was part of Barrett Smith's Master's Thesis under Prof. Sandra Yuter at North Carolina State University, and he is now working as a forecaster at the NWS Weather Forecast Office in Raleigh, North Carolina.

 Read the Abstract
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