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<br />The MESOCU model, developed by Kreitzberg and Perkey [9], IS a
<br />convective model similar to GPCM; however, it also permits local
<br />mesoscale destablization of soundings by lifting, and simulates the
<br />effects of cloud-environment interactions through mixing, subsidence,
<br />subcloud evoporation, solar heating, and surface eddy mixing. This
<br />model has been used to determine the effects of I ifting on convective
<br />cloud growth at HIPLEX sites by Matthews and Silverman [10]. The
<br />model requires an initial sounding and a vertical profile of
<br />me s 0 s c a I e I i f tin g , t pro v ide s a s u mm a r y 0 f con ve c t i ve pot en t i a I for
<br />c Iou d grow t has i n tab I e 4 , The tot a Ide p tho f a I I c Iou d sin a
<br />3-hour simulation may be considered a "convective potential index"
<br />(CPI), which gives a relative measure of expected convective
<br />activity.
<br />
<br /> Table 4. - Example of MESOCU output
<br />Cl DUO su""",,, rOA "A .,.0'..., I ~
<br />ClO ClO U....S~ ~II.S~ TO" D~"'" ~D~"'" ..DIUS ''''''In Clorl K ".e" ..~. V'...(& &y...c.. Dlrlln
<br />..u" ".. (1(,"' (..", (1("' 11("' (lit", Itt"' ("/~' ."". '0/01 10/01 ...... IIt"1
<br />I ..0 0.000 0.000 0,000 0,000 0.000 0.000 0.00 0.000 0.000 0,00 0,00 0,000 0,000
<br />i! 10.0 1,0.. 2,221 II.~.. 10. ~OO ..1"~ 2.000 i!.00 2.. .... n..oll 1If.1'0 .,.. .....e ,''7~
<br />1 11,0 1,0.. 2,221 12.0.. 11.000 .,..,~ 2.000 i!.00 ,..,.,. ... .00" ".011 ~,... I..". .''7~
<br /> II ,~ i!.0.. 2,1'1'1 .,..... ~,'7~O ~..i!~ 1'.000 P.OO ,...,.. .,...0 Ii!. III 11,... I,IM ,'~O
<br />~ 11',0 0,000 0.000 0.000 0.000 0.000 1'.000 P.OO 0,000 0,000 0.00 0,00 0.000 0.000
<br />
<br />"~.C~..T ".~C'''IT.TID'' .~.e"I"o O.OU"O
<br />""~ '''.SI !Ire ".~CI" 1I.!I~ ".~e'" "~.e~..T 1".'..' T'1ft: AVA'lA.l~ ro. ".~e'" W"AK
<br /> '..TO TlIft: T-W"AK/' T-AVO ""AK WAVO
<br /> ..000 .00' ..00 1.000 .00 .00 .00 ,00 ,00
<br /> 10,000 n..oll l~.lI.' .....01 ,..,~ i!I , 'lI ..". '...'77 ..~..
<br /> ".000 "1.00'7 "1, li!1 .~,OllJ 1'.~1 'a.". ..... .,... ....
<br /> II.~OO .."10 I 1. ll1l1 .1'.".0 '0.1" 11,.. 10..0 . 1. "1 .."
<br /> 1i!.000 ,001 . .00 1.000 ,00 ,00 .00 ,00 ,00
<br />
<br />HAIL is a program which computes the expected hai I size and
<br />downrush sustained wind and peak gust produced by local
<br />thunderstorms. This program is a forecast tool which analyzes a
<br />sounding, determines the convective ,cloudbase height. and uses
<br />empirical techniques described by Miller [11] to compute hail size
<br />and peak gusts. Table 5 presents a set of examples of this analysis
<br />for the soundings on July 17, 1979.
<br />
<br />Table 5. - Example of HAIL output
<br />
<br />CONVECTIVE
<br />TEMP (Cl
<br />30,3
<br />
<br />HAIL DIAMETER STATION DATE/TIME DIRECTION-SPEED
<br />INCHES OF MAX GUST (KTSl
<br />1,18 MA 79071715 142/064+067
<br />
<br />CONVECTIVE
<br />TEMP eCl
<br />30.6
<br />
<br />HAIL DIAMETER STATION DATE/TIME DIRECTION-SPEED
<br />INCHES OF MAX GUST eKTSl
<br />.57 MA 79071718 185/067+069
<br />
<br />CONVECTIVE
<br />TEMP eCl
<br />34.0
<br />
<br />HAIL DIAMETER STATION DATE/TIME DIRECTION-SPEED
<br />INCHES OF MAX GUST eKTSl
<br />,48 MA 79071721 350/074+077
<br />
<br />CONVECTIVE
<br />TEMP eCl
<br />32,7
<br />
<br />HAIL DIAMETER STATION DATE/TIME DIRECTION-SPEED
<br />INCHES OF MAX GUST eKTSl
<br />1,55 MAX 79071721 999/073+075
<br />
<br />CONVECTIVE
<br />TEMP eCl
<br />32,6
<br />
<br />HAIL DIAMETER STATION DATE/TIME DIRECTION-SPEED
<br />INCHES OF MAX GUST CKTSl
<br />.29 MA 79071800 288/070+073
<br />
<br />1 1
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