Data Overview 12 Hours Prior to Onset of Precipitation
Satellite Imagery 12/28 1200 UTC through 12/30 0000 UTC: Water Vapor (6.7µm) and Infrared
Identification of Synoptic-Scale Features and Orientation of Axes Upper impulse exits the southeast U.S. Upper Impulse exits the northeast U.S. Upper low dives south and southeast out of the Dakotas into the TN Valley while upper impulse in northwestern periphery of the upper low is just north of the Dakotas Evolution of Moisture No interaction with Gulf of Mexico, Atlantic or Pacific moisture No deep cloud cover below 600 Mb associated with the upper low Subsidence/Darkening - Darkening seen on southern periphery of upper low, associated with upper impulse Interaction with Tropical/Subtropical Plumes - No interaction Identification of Upper Jet Streaks - Darkening and subsidence associated with the upper impulse tracking around the southern periphery of the upper low by 0000 UTC 12/30
Upper Air Analyses 12/28 1200 UTC through 12/30 0000 UTC: 300 Mb, 500 Mb and 850 Mb
Identification of Synoptic-Scale Features and Orientation of Axes Identification of Upper/Low-Level Jet Streaks 850 Mb Thermal and Moisture Advection
Surface Data and Trends
NextThermodynamic Profiles (Upper Air Observations) 12/30/00: Wallops Is. (WAL), Greensboro (GSO) and Morehead City (MHX) 12/29 1200 UTC and 12/30 0000 UTC Surface Plots 12/30 0000-0300 UTC radar data
