IPEX field Log for the Final IOP, DOW 2
Jeff Trapp, Ph. D.- NOAA/NSSL 02/24/00
NOAA/National Severe Storms Laboratory and
Cooperative Institute for Mesoscale Meteorological Studies
From DOW2's viewing perspective, the front-indicated on radar as a layer of northerly winds, below a layer of more southerly winds-is only 500 meters deep. I expected a much deeper front. So did the Dave Schultz and others on the P3, who, because of flight restrictions, couldn't fly low enough penetrate the front. In fact, these restrictions kept the P3 above the snow-producing clouds: the tops of the radar echoes, showing approximately the cloud tops, were only 2.5 to 3 kilometers above the ground. Considering the very deep thunderstorm clouds, whose tops can extend 12 to 15 kilometers above the ground, it amazed us that such shallow clouds could be dumping so much snow in the valley and in the mountains!
The P3 is scheduled to land at noon. We'll shut down the radars at that time, in order to conserve resources and also rest for the next and final day of the project.
The next day's event never materialized as advertised by the computer models, leaving us with lots of retrospective "what ifs" and "we should haves." And, it served as a reminder that the difficulty with which the computer models have at accurately predicting precipitation in the Intermountain West is precisely what motivated IPEX!
|Non-Flash Journal Index||IPEX Log for DOW #2 1 2|