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<br />. <br /> <br />snow between 6 p.m. on 14 April and 6 p.m. on 15 April. The <br /> <br /> <br />highest amounts of precipitation for 24 hours during the storm <br /> <br /> <br />were 7.5 inches at Fry's Ranch, 5.7 inches at Fremont Experimental <br /> <br /> <br />Station, and 5.5 inches at Silver Lake. An isohyeta1 pattern for <br /> <br /> <br />the total storm period of 43 hours is shown on plate 2. <br /> <br />STORM OF 30-31 MAY 1935 <br /> <br /> <br />Heavy precipitation during this storm resulted from waves <br /> <br /> <br />forming on a quasi-stationary front that extended in an east-west <br /> <br /> <br />direction across the Central United States. There were two very <br /> <br /> <br />intense centers in this storm, one near Elbert, Colorado, and the <br /> <br /> <br />other at Hale, Colorado. The total rainfall in each center was <br /> <br /> <br />24.0 inches. At Elbert it was estimated that the rain fell in <br /> <br /> <br />about 6 hours. A 2-hour rainfall of 9,0 inches was reported to <br /> <br /> <br />have occurred at Seibert, Colorado. The average 6-hour rainfall <br /> <br /> <br />over 1,000 square miles was 5.8 inches as determined from Storm <br /> <br /> <br />Study MR 3-28A. The isohyeta1 pattern for this storm is shown on <br /> <br /> <br />plate 3. <br /> <br />STORM OF 30 AUGUST-4 SEPTEMBER 1938 <br /> <br /> <br />The rainfall from this storm began on the afternoon of 30 <br /> <br /> <br />August as convective thunderstorms along the eastern slope. On <br /> <br /> <br />31 August, a cold front passed southward over the South Platte <br /> <br /> <br />River basin and became quasi-stationary across the Texas Pan- <br /> <br /> <br />handle and Northern New Mexico. Tropical moist air, flowing up <br /> <br /> <br />from the Gulf, was lifted above the cold front and also deflected <br /> <br /> <br />westward against the eastern slopes of the mountains. The orographic <br /> <br /> <br />lifting of the polar air and the maritime tropical air above it <br /> <br /> <br />resulted in intense thunderstorms and shower activity over both <br /> <br />the mountains and plains region. Although rainfall for the period <br /> <br />. <br /> <br />15 <br />