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<br />100 <br /> <br /> <br />Figure 3.3. - Icing occurrence as a function of temperature for three mountaintop locations along the Sierra Nevada. <br /> <br />"..... <br />~ <br />'-" 12 <br />G- <br />el <br />(l.) <br />g. 10 <br />(l.) <br />s.... <br />~ <br /> <br />90 <br /> <br />- <br />eft <br />- <br /> <br />. Red HIII- 1950m <br />* Dyer Mtn. - 2290m <br />. Squaw Peak - 2642m <br /> <br />110% <br />100% <br />90% <br />80% G- <br /> el <br />70% (l.) <br />::1 <br /> 0'" <br />60% (l.) <br />s.... <br />~ <br /> (l.) <br />50% -~ <br />.... <br /> ro <br />40% "3 <br />E3 <br /> ::1 <br />30% u <br />20% <br />10% <br />0% <br /> <br />AVG.=.81 N=56 <br />11 icing events had no precipitation <br /> <br />Figure 3.4. - Icing hours as a percent of precipitation hours for a mountaintop site in the Feather River Basin (Red Hill). <br /> <br />80 <br /> <br />> <br />o <br />z <br />UJ <br />::> <br />o <br />UJ <br />a: <br />LL <br />UJ <br />> <br />i= <br /><( <br />...J <br />::> <br />:E <br />::> <br />() <br /> <br />70 <br /> <br />60 <br /> <br />50 <br /> <br />40 <br /> <br />30 <br /> <br />20 <br /> <br />10 <br /> <br />o <br /> <br />-16 -14 -12 -10 <br /> <br />-6 <br /> <br />2 <br /> <br />-4 <br /> <br />-2 <br /> <br />o <br /> <br />-8 <br /> <br />TEMPERATURE (C) <br /> <br />Icing Hours as % of Precipitation Hours <br />For All Storms With Icing (Red Hill) <br /> <br />18 <br /> <br /> - <br /> - <br />I- <br /> - <br /> / - <br /> ~ <br /> <br />16 <br /> <br />14 <br /> <br />8 <br /> <br />6 <br /> <br />4 <br /> <br />0-.25 .25-.50 .50-.75 .75-1.0 1.0-1.5 1.5-2.0 >2.0 <br />Fractional Part of Storm Having Icing <br /> <br />~ Frequency -a- Cumulative Frequency <br /> <br />8 <br />