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<br />\.'.,...- <br /> <br />APPEIlDIX I <br /> <br />Calculation:::' of Criticial t'odrsf't Areas <br /> <br />AssUIlTOtions : <br />1) <br />2) <br /> <br />Area of' the updraf't equals the area of the <br />precipitDtion <br />Cloud \vater to precipitation Hater conve!'sion <br />eff'iency 8VJra{;6 55:-, \-11 th a 10\: vdue of' 20,: <br />(Auer & LarHi tz,1968) <br />3) AveraGe undraft velocity 400 en/see <br />l~) LOL 13,000 f L,;L. (2.1 kr.1.) o!' 620 mb. lie:,:ton <br />(1966),~d1auser(197l) and _~er& }~rwitz(196Q) <br />Climfltolor:ical Date: <br />:,OI'T.lal Daily i';3Xir.ro,un Temperature for tareot areD <br />Ju."'1e 70' F <br />. July 75< F <br />August 75<' F <br /> <br />The Hater conto~t of' the air \"as determined by lif'tinf, ::.n tir <br />parcel o:::-y adir>bstically,Hith the surface air tce:nperatl1C'e, <br />fron tho surf'~co to the lifting condensation lovcl (LGL) and <br />assuninc that t~e parcel at t~~s temperature is saturatod. <br />These calculations Here accOl11lilished by usinc a 3l~eH-T thertlo- <br />dyn:mic di3[;!'('!'J to estil1Jate the temperature at the LGL D.."'1G. then <br />usin,:; t::e 5.-;:i th:::or.icn ;,eteorolocical ';:'ables to determine the <br />mi:dnG ratio '.:t the r:iven pressure and temperature. <br /> <br />Calculction of the u~draf't area was then acconplished by <br />calc:'],Gti:1,": t:,e :?,'~r30unt of' air that had to be processed,st <br />s Given e~riency,to produce the Given volume of' Hater. <br /> <br />\ <br /> <br />,,). <br />., , <br />I <br /> <br />"'. <br /> <br />A= critical Updraft area <br />E= cloud o1'fiency <br />\{.= VOiUl1e l"lu;;: 01' Hater <br />,~ updraf't veloci~y <br />w= sat.....'ated r.ri.xin[; rll1;io <br />~ = density of' air <br />fw= density of Hater <br /> <br />i <br /> <br />"' _' '~''''d ~~J......I . <br />,'-.-'_L --" ,r:" _1 _ _ _ L (L.. <br />--~ -'-- ... -~c. ___ <br />I I 1':.,<'<'<' ! \~~- <br />t:lh"'erl sk . <br /> <br />(= ri. <br /> <br />H ",,~/t <br /> <br />,.- ':.f./ :! H '" ~ <br /> <br />C~lculation -'e~ults <br /> <br />volu..,e .:lux .'</ <br /> <br />'c~ <br /> <br />i (a.u <br />A <br />I) <br />C' <br />D <br />E <br /> <br />1344<':' a_ ~",J 84.... a",... (~~.JI ~~<:~::1;;.. <br />SO ;.~'H.)(IL'" .'130 <br />7~ J,'lY3XID~ ,1/0 <br />to,) Z. :r7c x; 10' .810 <br />ISO J8l{S' x,Ol. .It'~- <br />J?S" '1.:,-33 x/c" .~5"o <br /> <br />PrecinitDtion = <br />Q ""''i.t.. over 6 hrs. for <br />1.4Z:; Xlt~t \2:UU yr. evo:lt~ <br />r. It , <br />2.0/1XIO\ re~ 'J.'ocn <br />Z. Hl>'j( H:~~:, _.I.. . <br />3. "71' X 10 ~~-- <br />"I. 5'{'1)( 10 ,1. <br /> <br />c...... <br /> <br />t..:..:.E <br /> <br />/ <br />/ <br />raner "',, <br />. i' <br />/ <br />