Weather and Climate Systems

Title: Regional Characteristics of Flash Droughts Across the United States   Abstract: Flash droughts are characterized by the rapid onset and development of drought conditions. When a combination of extreme atmospheric anomalies (such as lack of rainfall, higher surface temperatures, higher surface wind speeds, and higher vapor pressure deficient) persist for several weeks, rapid depletion […]

TBD

Weather and Climate Seminar   Characterization of the Structure of Tropopause Polar Vortices using Remote Sensing   Ryan Pajela Wednesday, January 30th 3:00pm/NWC 5930     Tropopause polar vortices (TPVs) are atmospheric coherent vortex-like structures originating poleward of the jet stream and exhibit a closed circulation of the wind along the 2-PVU dynamic tropopause.  Cyclonic […]

TBA

WSR-88D-based storm-scale circulation tendencies preceding tornadogenesis: A preliminary study

ABSTRACT: In 2016, NCEP selected the Finite Volume 3 (FV3) dynamical core to be the cornerstone of its NWP efforts in the years ahead. The first step towards a Unified Forecast System (UFS) is the implementation of the FV3GFS which will become the operational global model in early 2019. This presentation explains the need for the UFS, examines objective and subjective results from real-time and retrospective testing of the FV3GFS, and discusses modeling plans going forward.

Characteristics of Arctic Cyclones Associated with Very Rapid Sea Ice Loss Events

Critical Atmospheric and Sea Surface Temperature Linkages to United States Great Plains Pluvial Years