Numerical model-based diagnostic study of the rapid development phase of the Presidents' Day cycloneA mesoscale model simulation of the Presidents' Day cyclone at 1200 GMT 18 February 1979 is presented which captures the upper-tropospheric intrusion of stratospheric air upstream of the East Coast and subsequent development of the surface cyclone. The model simulation is then used to examine the descent of the stratospheric air mass and the interaction of this air mass with a lower-tropospheric potential vorticity maximum associated with an inverted trough and coastal front along the East Coast. The model is also used to examine the processes that contribute to the rapid decrease of sea-level pressure and increase in lower-tropospheric cyclonic vorticity during the explosive development phase of the cyclone.
Document ID
19890031892
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Whitaker, Jeffrey S. (Florida State University Tallahassee, United States)
Uccellini, Louis W. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Brill, Keith F. (General Sciences Corp. Laurel, MD, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1988
Subject Category
Meteorology And Climatology
Meeting Information
Meeting: Conference on Numerical Weather Prediction