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Last modified
7/28/2009 2:28:04 PM
Creation date
10/1/2006 2:14:14 PM
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Template:
Weather Modification
Applicant
Western Weather Consultants
Project Name
San Juan Mtns.
Date
11/15/1979
Weather Modification - Doc Type
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<br />~-.... <br /> <br />Attachment C <br /> <br />. <br /> <br />" <br /> <br />SUSPENSION GUIDANCE <br />FOR <br />AVA1.ANCHE AND SEVERE STORM <br />FOR <br />1978-79 SAN JUAN PROGRAM <br /> <br />A. Sl1(lwp:lck ]I.'~~S than 90% uf Normal. <br /> <br />Lor';l t ion <br /> <br />24 I1r. Max. And/Or <br />~-'- --,--- <br />Prcctp. Fest. (1120) <br /> <br />2.5 <br />2.0 <br />2.5 <br /> <br />Previous 10 Day <br />Accumulation <br /> <br />Ho]f Cr"ek Pass <br />H\'d ~hl\l[\l:lln Pass <br />Llz;t.;lrd Il\~ad Pass <br /> <br />4.50 <br />4.00 <br />4.50 <br /> <br />B. Snuwpaek 90 to 119% of Normal <br /> <br />Holf Creek Pass <br />Red ?-1oulllain Pass <br />LJzzard Head Pass <br /> <br />2.0 <br />1.5 <br />2.0 <br /> <br />4.00 <br />3.00 <br />4.00 <br /> <br />C. Snowpaek 120 to 149% of Normal <br /> <br />Holt Creek Pass <br />Red ?-lolllll.1in Pass <br />1.1 zznrJ 1iL':ld Pass <br /> <br />1.0 <br />.75 <br />1.0 <br /> <br />2.50 <br />2.00 <br />2.50 <br /> <br />D. Snowpack greater them 150% of Normal <br /> <br />Ho]f Creek Pass <br />l~\'d J'olllullt.lln 1'11:;5 <br />Lizzard 11\!<1d Pass <br /> <br />.7 ' <br />.5 <br />.7 <br /> <br />1. 75 <br />1.25 <br />1. 75 <br /> <br />E. .\dd i 1. illllal CUllS id"r:ltion w.ill Le given to wind in each and every case. The <br />mosl h:lzarduus wind speeds range from 30 K~to 50 Kts. To assess avalanche <br />IH)l\>llt i;d, use the following: <br /> <br />Alil! i,l ilJ~ll~I_Lj{Jsk__~:~c~~: Luw <br />]0,000 Ft. \~ind Speed 15 Kts. <br />]2,000 Ft. Iii nd Speed 20 <br />14,000 Ft. h1ind Speed 25 <br /> <br />~UJT <br /> <br />25 <br />30 <br />35 <br /> <br />l1igh <br />35 <br />40 <br />45 <br /> <br />Extreme <br /> <br />45 <br />50 <br />55 <br /> <br />F. <br /> <br />A ~,('c()IHl factur to consider is the <br />If a pro1ull~cd sunny & W.1rm period <br />dlff Icull Umc :ldlll'rlng lO the old <br />the following: <br /> <br />condition of the surface of the old snow, <br />preceeds a storm, the new/snow will have a <br />sllr[ace. To assess aval~che potential, use <br />/ <br /> <br />Rille: of thumb for "lid"s: <br />SIH.I\..../h'.\ I l''=. Ra l i,~. <br />20/1 IH" J <br />]5/1 15" <br />]2/1 12" <br />lOll 10" <br />8/1 8" <br /> <br />Will cause sliding. <br />This requires a build up <br />proper weight. <br /> <br />Tho :l'lO\'C ;1\1l011lltS lh'C'd to be correlated wi th wind. <br /> <br />Thif> t:llid;JIlCC docs not 'lpply to th:lwing ;-walanchcs, but should certainly enter ioto <br />the I!;lzdrd Eva111at iOIl I,...h(>n .1 prcc1p.itilt Inn l'pisnrlc follows thnwing conditions. <br />
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