Laserfiche WebLink
<br />( <br /> <br />i <br />1 <br />TABLE XII. --Three-season historical record of daily precipitation <br />amounts at Berthoud Pass which equaled or exceeded. 40 inch. I <br /> <br /> BERTHOUD PASS DAYS;:: .40 <br /> 1964-65 <br />November .45 .49 <br />December .54 .42 1. 23 .79 .45 .63 <br />January .59 1. 03 <br />February .65 <br />March .41 .55 .62 .54 <br />April .58 .40 <br />May .48 .71 .41 11.97 on 20 days <br /> 1965-66 <br />November .79 .45 .40 .86 -I <br />December .41 I <br /> I <br />January 0 , <br />February .44 <br />March .40 <br />April .50 .45 <br />May .55 5. 25 on 10 days <br /> 1966-67 <br />November .69 <br />December 1. 03 .79 <br />January .59 .48 .59 <br />February .42 .78 .52 <br />March .65 <br />April 1. 27 .46 <br />May .60 .71 9. 58 on 14 days <br /> <br />TABLE XIII. --Three season totals of storm days grouped by duration <br />periods, San Juan area. <br /> <br />Dura tion <br /> <br />1 day 2 days 3 days 4 days 6 days 8 days Tota1- <br /> <br />34 26 12 5 2 1 80 <br /> <br />Number Cases <br /> <br />Number Days <br /> <br />34 52 36 20 12 8 162 <br /> <br />exposure from the north. Table XIV, for example, <br />shows the coincident amounts of precipitation at the <br />respective stations hour by hour for the period 27- <br />29 December 1964. This is presented as a typical <br />case to show the correspondence of precipitation for <br />the respective hours and is typical of some of the <br />heavier storms in the San Juan area. In this par- <br />ticular sequence, there were 32 hours that had <br />precipitation at one or more stations. Slightly more <br />than half of these (17 hours) had coincident precipita- <br />tion at two or more stations. A quarter of these <br />(8 hours) had coincident precipitation at three or more <br />stations and only four hours had simulataneous <br /> <br />precipitation at all four stations. During the hours <br />shown with an "X" for Telluride, the gage was only <br />accumulating precipitation and not giving hourly <br />amounts. These hours have not been counted in the <br />above tabulation, but are shown s,ince this is fre- <br />quently the case for hourly precipita tion data <br />reported in the publication "Climatological Data. II <br />Precipitation at any individual station is highly <br />dependent upon its orographic exposure cat any <br />specific time, and it cannot be assumed that snowfall <br />is occu'rring simultaneously at all areas during <br />precipitation episodes. This substantially increases <br />the number of hours of precipitation that must be <br /> <br />48 <br />