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<br />I <br /> <br />1I{ <br /> <br /> <br />..------- ---.-.--- <br />~ -- <br />'lI1TIIllI~---------' <br /> <br />~ <br /> <br />SEEDING <br />NEUTRAL <br /> <br />~ <br /> <br />STABLE <br /> <br />I <br /> <br />UNSTABLE <br /> <br /> <br />=- <br /> <br />-- <br /> <br />400 m b <br /> <br />DISSIPATION <br /> <br />f- <br /> <br />I <br /> <br />-------- <br />8 +6 <br />e ________ <br /> <br />8~ + 0 <br /> <br />8e +4 <br /> <br />- <br /> <br />I <br /> <br /> <br />I 8e + 2 <br /> <br /> <br />6 - <br /> <br />I~ <br />~- <br />I <br /> <br />8e <br /> <br />- <br /> <br />;2~.-'<"" <br />rvr'==::, _ "\ <br />\'- <br /> <br />-i <br /> <br />r-- <br /> <br />- 500 <br /> <br />I <br /> <br />i <br />{ ~ <br />-i~ -' /" --/' <br />-:;' ., ,'--- ..~ <br /> <br />~~~~.oo, <br /> <br /> <br />7/77//77/// / / / // / / / / / / / //7///77 / ;~/ <br /> <br /> <br />, <br />t " <br />,~L <br /> <br />, <br />>-- <br />-~ <br /> <br />--';---- <br /> <br />- 600 <br /> <br />4 <br />--...........-- <br /> <br />o 00 <br /> <br />o 0 <br /> <br />I <br /> <br />3-r- <br /> <br /> <br /> <br />2 ~ BOO <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />PREC/PIT~~rtrJ <br />~..==r::CCIII <br />~ TIME <br /> <br /> <br />:-:--- <br /> <br />I <br /> <br />Figure 3.1. Schematic of heigh-time cross section for typical storm over the <br />San Juans. The solid lines are lines of constant equivalent <br />potential temperature (0 ), the h::ttched area is conditional <br />inst<1biJ.ity (30 /Ci Z < O):~ The typical sequence of 500 mb <br />temperature is ~hO\vn at the top. The reference baseline is <br />-23C. The level below which the 'vind directions are <1600 <br />is indicated by circles and is defined as blocked flow. The <br />fO\lr stages of the storm are indicated as well as the typical <br />secdinB period. The precipitation rnte is sho\vn at the bottom. <br /> <br />II <br />II <br /> <br />I <br /> <br />I <br />