WMOD00277

• Contract/Permit #: 14-06-D-6467
• Title: An Operational Adaptation Program for the Colorado River Basin
• Prepared By: Lewis O. Grant, Chappell, Crow, Mielke Jr., Rasmussen, Shobe, Stockwell, Wykstra
• Date: 10/1/1969
• State: CO
• Country: United States
• Weather Modification - Doc Type: Report

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FREQl.ENCY OF OCCURRENCE

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700MB MIXING RATIO (GM / KGM)

Figure 45. --(a) Mean Daily Snowfall at Climax as a function of
the 700 mb mixing ratio. (b) Distribution of total snowfall and
total occurrences as a function of the 700 mb mixing ratio
computed over a .4 gm/kgm class interval.

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FREOUENCY OF OCCURRENCE ( b I
r_L~~CENTAGE OF mT"AL SlCllFALL

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7QO MB MIXING RATIO (GM/ KGM)

Figure 46. --(a) Mean Daily Snowfall at Wolf Creek Summit as
a function of 700 mb mixing ratio. (b) Distribution of total
snowfall and total occurrences as a function of the 700 mb
mixing ratio computed over a .4 gm/kgm class intervaL

The distribution of mean daily snowfall
shown in Figure 46 exhibits a trend upward with
the mixing ratio. The trend is nearly linear up
to 3.2 gm/kgm but a sharp increase is,noted
between 3. 2 gm/kgm and 3. 6 gm/kgm. .

(4) Daily snowfall related to equivalent potential
temperature
At Climax, Colorado, the 700 mb level
is generally just below cloud base. The equiva-

lent potential temperature at this level then very
nearly defines the pseudoadiabatic process curve
taken by air parcels participating in the precip-
itation process.

Figure 47 shows the distribution of
snowfall and daily snowfall occurrences as a
function of the 700 mb equivalent potential
temperature computed using a 40 K class interval.
The frequency C1.:rve indicates a broad maximum

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