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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />pcrsistt.>u over the plateau, the depths in the northwesterly flow regime were generally below 0, I mm <br />In addition to drying, the temperature dropped to about -16" with additional cold advection on the <br />hack side of the trough. The northwesterly flow and cold temperatures pc:rsistcd through 23 <br />February, and although shallo\'i clouds developed over the plateau, SLW was negligible and no <br />seeding experiments were conducted. <br /> <br />/' t:a-- 2~ <br />~SO <br />./' <br /> <br />2980 <br /> <br /> <br />2980 <br /> <br />'li..- <br /> <br />'~ <br /> <br />'\:j, <br /> <br />30 0 <br /> <br />"-- <br /> <br />30 <br /> <br /> <br />\,/" <br /> <br />1"\0'0 ~ <br /> <br /> <br /> <br />3WO <br />" <br />'\ <br /> <br />" <br /> <br />30eo <br /> <br />~ <br /> <br />~ <br /> <br />\ <br />v- ~ <br />Uo'., r:' ~~r: <br />IlK: ~1:DDl1llY 9'IlILoU <br /> <br />~ <br /> <br />- <br /> <br />./'" <br />" <br /> <br />ulJl" <br /> <br />, <br />~, <br /> <br />FIgure 32. Same (.1.\' FIg. .1. excepf filr 120() GAfT (0500 MST) 011 27 February /9Y.J. <br /> <br />E. 27 Fehruar)' Storm Period <br />This storm over the Wasatch Plateau resulted from an upper level disturbance which <br />propagated through a weak ridge in the westerlies. The wave crossed Utah quile rapidly so that by <br />the end of27 February. a ridge to the wcst was again building and the Great Basin was under the <br />influence of dry northwesterly flow. Figure 32 shO\\IS the position oflhe short wave trough and cloud <br /> <br />42 <br />