4.7 Summary
In this chapter we discussed condensation and precipitation producing
processes. Following a discussion on condensation and precipitation producing
processes, we then covered condensation and precipitation dissipation
processes.
Forecasting of frontal clouds and weather was then discussed, including the
topics of frontal cloudiness and precipitation, air mass cloudiness and
precipitation, vertical motion and weather, vorticity and precipitation, and
middle clouds in relation to the jetstream. We then covered short-range
extrapolation techniques, which included use of the nephanalysis, frontal
precipitation, lowering of ceilings in continuous rain areas, the trend chart as
an aid, and the time-liner as an aid. A discussion of cloud layer analysis and
forecasting was then presented along with the importance of RAOB use in cloud
analysis and identification, the humidity field, a 500-hPa level analysis of the
dewpoint depression, a three-dimensional analysis of the moist layer,
precipitation and clouds, and cirrus indications. A discussion of the prediction
of snow versus rain followed. Topics presented were geographical and seasonal
considerations, the physical nature of the problem, general synoptic
considerations, forecasting techniques, and areas of maximum snowfall. The last
topics of discussion were factors affecting temperature, and the forecasting of
temperatures during special situations.
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