Laserfiche WebLink
<br /> <br /> <br />14 <br /> <br />12 <br /> <br /> 10 <br />E <br />0< <br />-' 8 <br />on <br />:IE <br />~ <br />> <br />Q <br />.c <br />~ <br />- 6 <br />.c <br />~ <br />'0;; <br />:I: <br /> 4 <br /> <br />2 <br /> <br />330 340 350 360 <br />9. (OK) <br /> <br />Figure 17. Plot of equivalent potential temperature (0,) versus height lor Sterling, Colorado, <br />soundings. <br /> <br />2.3 Analyses for 0000 GMT, <br /> <br />1 August 1976 <br /> <br />Synoptic and regional scale conditions <br />at 0000 GMT, 1 August, were studied using <br />a varietv of charts and data. Surface <br />analyses 'along with 700, 500, and 300 mb <br />upper-air analyses are presented in Figs. <br />18 through 23. <br />By 0000 GMT the trailing front had <br />overtaken and reinforced the leading front <br />(see Figs. 18 and 19), except in south cen- <br />tral Colorado where the leading front had <br />become diffuse and was analyzed as under- <br />going frontolysis. The low pressure center <br />in western Colorado had deepened to 1005 <br />mb and was located just north of Eagle. <br /> <br />22 <br /> <br />Surface pressures had remained nearly <br />constant along the Front Range, and had <br />risen 1 to 3 mb over southwestern Ne- <br />braska, northwestern Kansas, and north- <br />eastern Colorado. A 1200 GMT pressure <br />difference of2.9 mb between Grand Junc- <br />tion and Sidney, Nebraska. had increased <br />to 10.5 mb by evening. Twelve-hour <br />changes in the 850 to 500 mb thickness <br />(Fig. 20), which included 70 m increases <br />over northwestern Colorado and 20 m de- <br />creases over southern Nebraska, indicated <br />a strengthening of the easterly pressure <br />gradient through a large depth of the <br />