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VJ5 IP 1 L1 v �zID A � Return if not delivered
<br /> 0(} ,+� ] UNITED STATES DEPARTMENT OF AGRICULTURE THIRD-CLASS BULK RATE
<br /> V Z V�)k/5 SOIL CONSERVATION SERVICE
<br /> ,,� United States SNOW SURVEY UNIT
<br /> 2490 WEST N AVE.
<br /> Department Of POSTAGE AND FEES PAID
<br /> ' 28T
<br /> AgricultureCOLORADO AND DENVER,CDIOSINESS 211 ILISER, CO O
<br /> OFFICIAL PRIVATE
<br /> SS DENVER, COLORADO
<br /> Soil PENALTY f00.0.0.1VA iE USE,$300
<br /> PERMIT NO. G-267
<br /> Conservation
<br /> Service
<br /> Denver,
<br /> Colorado
<br /> NEW ME
<br /> 0 Ap
<br /> V ? j? 1 ? 1984
<br /> cotO R400
<br /> Cif
<br /> WA TER, SUPPLY OUTLOOK
<br /> i
<br /> STREAMFLOW FORECAST
<br /> IIIIIIIIIIIIIIII AS OF IIIIIIIIIIIIIIII
<br /> GREEN
<br /> APRIL 1, 1984
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<br /> The map on this page indicates the most probable water supply as of the date of this report. Estimates
<br /> v" e .. `
<br /> u: assume average conditions of snow fall., precipitation and other factors from this date to the end of the fore—
<br /> As the season progresses accuracy of estimates improve. In addition to expected streamflow.
<br /> reservoir storage, soil moisture in irrigated areas, and other factors are considered in estimating water sup—
<br /> ply. Estimates app!y to irrigated areas along the main streams and may not indicate conditions on small
<br /> tributaries.
<br /> WATER SUPPLY CONDITIONS
<br /> os 0f
<br /> APRIL 1, 1984
<br /> A SERIES OF FAST MOVING WINTER STORMS MOVED ACROSS THE MOUNTAINS OF
<br /> r Date: APRIL 1, 1984 COLORADO AND NORTHERN NEW MEXICO DURING MARCH AND PRODUCED NEAR AVERAGE PRECIPITA
<br /> SURFACE WATER SUPPLY INDEX TION. SNOWPACK FIGURES REMAINED THE SAME AS LAST MONTH. SNOWMELT RUNOFF
<br /> YAMPA-WHITE-N. PLATTE /-- VOLUMES IN COLORADO ARE EXPECTED TO PRODUCE AVERAGE TO OVER 60% ABOVE AVERAGE
<br /> SOUTH PLATTE ��� STREAMFLOWS. MOST AREAS OF NEW MEXICO ARE ANTICIPATED TO HAVE EXCELLENT STREAM-
<br /> -' FLOWS FOR THE MARCH-JULY PERIOD IF NORMAL PRECIPITATION IS RECEIVED THE REST OF
<br /> LEGEND
<br /> '• �` r �` 3,3 __.._major rivers THE SPRING. ALL FORECASTS ARE A JOINT EFFORT OF THE SOIL CONSERVATION SERVICE
<br /> •� ......,m basin boundaries
<br /> Surface Water AND THE NATIONAL WEATHER SERVICE.
<br /> Supply Index
<br /> C r R' 3,O SCALE
<br /> ' COLORADO '�, ' +4 COLORADO NEW MAXIMUM READINGS AT TWENTY-ONE SNOW COURSES WERE
<br /> '&\ \ +2 abundant supply
<br /> near normal
<br /> _2 RECORDED THIS MONTH. MOST RECORD MAXIMUMS WERE IN THE VARIOUS WATER-
<br /> orate drought
<br />,,f• --\ 4 severe drought SHEDS IN THE COLORADO RIVER BASIN. IRONTON PARK SNOW COURSE NEAR RED MOUNTAIN
<br /> extreme drought
<br /> ARKANSAS
<br /> ��6+"" ,�•� PASS HAS THE MOST SNOWPACK IN 47 YEARS. HIGHEST SNOWPACK STATISTICS ARE RECORDED
<br /> Y HE COLORADO AND
<br /> �► __ HE ARKANSAS RIVER BASIN AT 44% ABOVE AVERAGE, FOLLOWED B T
<br /> IN T
<br /> RIO GRANDE
<br /> GUNNISON RIVER BASINS AT 41% AND 37% ABOVE RESPECTIVELY. STREAMFLOW VOLUMES IN
<br /> SOUTHWEST COLORADO ARE NEAR AVERAGE, WHILE THE ARKANSAS, COLORADO, AND GUNNISON
<br /> RIVERS ARE ALL OVER 135% OF AVERAGE. STORED WATER IN THE STATE'S MAJOR RESER—
<br /> SAN JUAN -DOLORES
<br /> ! �•--, .�� }--•J� VOIRS IS 46% ABOVE AVERAGE, DOWN 4% FROM LAST MONTH.
<br />'~ COLORADO NEW MEXICO LOW ELEVATION PRECIPITATION WAS HIGHLY VARIABLE IN THE
<br /> NORTHERN PORTION OF THE STATE. PRECIPITATION FOR THE MONTH RANGED FROM
<br /> The Surface Water Supply Index (SWSI) is a weighted value derived for each
<br /> major basin which generally expresses the potential availability of the A LOW OF 41% OF AVERAGE AT CANJILON RANGER STATION TO A HIGH AT PECOS OF 326%.
<br /> forthcoming season's water supply. The components used in computing the
<br /> index are reservoir storage, snowpack water equivalent, and precipitation. MOST SEASONAL TOTALS ARE SLIGHTLY BELOW NORMAL TO 50% ABOVE AT PECOS. STATEWIDE
<br /> The SWSI number for each basin ranges from a -4.00 (prospective water
<br /> supplies extremely poor) to a +4.00 (prospective water supplies plentiful). SNOWPACK IS 130% OF AVERAGE, DOWN 3% FROM MARCH 1. EXPECTED STREAMFLOW VOLUMES
<br /> The SWSI number is only a general indicator of surface water supply condi- RANGE FROM A LOW OF 95% OF AVERAGE FOR THE JEMEZ RIVER TO A HIGH OF 45% ABOVE
<br /> tions. Further data analyses may be required in specific situations to more
<br /> fully understand the impacts of abnormally dry or wet conditions suggested AVERAGE FOR THE RIO GRANDE AT SAN MARCIAL. SOME LOCAL STREAMS MAY HAVE MUCH
<br /> by the SWSI. Development of the SWSI has been a cooperative effort between
<br /> the Colorado State Engineers' Office and the Soil Conservation Service. HIGHER VOLUMES THAN NORMAL. RESERVOIR STORAGE IS 213% OF AVERAGE COMPARED TO
<br /> 120% OF LAST YEAR.
<br /> " The Conser.ration of [Water begins with the Snow Surrey " p,, 00,,,,
<br />
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