Vail
Elev 2400 m
Grand Junction
Elev 1400 m
Continental
Divide
514000 ww
Denver
Elev 1600 m
Figure 1. Topographic profile from Grand Junction to Denver.
Figure 1 shows a topographic cross-section from Grand Junction to Denver. The
numbers in parentheses are the elevations of the various locations above sea level.
Suppose the air temperature in Grand Junction is 19°C and the dewpoint temperature is
10°C. Consider a parcel of air originating at Grand Junction and flowing over the crest
of the Continental Divide to Denver. Assume that all condensed water falls out of the cloud as condensation so that any subsidence causes the relative humidity to decrease, and use an SALR of 0.5degC/100m
What is the relative humidity of the parcel at Grand Junction (1400 m)?