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LAI Retuwf not delivered UNITED STATES DEP RTMENT OF AGRICULTURE THIRD-CLASS BULK RATE 001.803 SOIL CONSERVATION SERVICE POSTAGE AND FEES PAID United States SNOW SURVEY UNIT (Ki IN' Department of 2490 WEST 26TH AVE. USDA-SCS W Agriculture DENVER,COLORADO 80211 CIAL BUSINESS DENVER,COLORADO Soil COLORA120 AND PENALOTYFFFIOR PRIWATE USE,5300 PERMIT NO. G-267 Conservation Service Denver, Colorado NEW MEXICO L,Vl) co A �, W, T SUPPLY OU T- L OOK A ER STREAMFLOW FORECAST AS OF 11111111 GREEN MARCH 1, 1984 AMA V1111 rE MIN "0 Wt "0, A *PE kM A� ii N .................. -1.............. " A 'al 3 !AJ 7 4� 01 LEGEND A Forecast Point Watershed AfM Boundaries X Rll!a STREAMFLOW FORECASTS -80 Average Percent of 1961 f Over 130P/o n,� 5P oiM 110-130% 90-110% ;"P, a 70- 90% nv V MOM Under 709/6 g NRP a P, ........... .......... ................ ........ .... r 2,zx 0 sf The map on this page indicates the most probable water Supply as of the date of this report. Estimates assume average conditions of snow fall. precipitation and other factors from this date to the end of the fore— A v, cast period. As the season progresses accuracy of estimates imDrove- In addition to expected strearriflow. �xgss! reservoir stOT-age, soil moisture in irrigated areas, and other factors are considered in estimating water sup— Ply Estimates app!y td'4,rr�gated areas along the main streams and may not indicate conditions on small tributaries. WATER SUPPLY CONDITIONS Date: March 1, 1984 MARCH 1, 1984 SURFACE WATER SUPPLY INDEX MOUNTAIN SNOWPACK DECLINED FOR THE SECOND MONTH IN A ROW OVER MUCH OF YAmPA-wHITE-N. PLATTE COLORADO AND THE NORTHERN PORTION OF NEW MEXICO. LOW ELEVATION PRECIPITATION SOUTH PLATTE WAS HIGHLY VARIABLE THROUGHOUT COLORADO AND BELOW AVERAGE IN NEW MEXICO. STREAMFLOW FORECASTS GENERALLY HAVE DECREASED FROM WHERE THEY WERE A MONTH AGO. LEGEND major rivers basin boundaries STREAMFLOW VOLUMES IN COLORADO AND NORTHERN NEW MEXICO HAVE DECREASED 10% to 15% Surface Water Supply Index FROM FEBRUARY 1. EVEN THOUGH THE FORECASTS HAVE DECREASED, NEARLY ALL AREAS C, --I SCALE ARE EXPECTED TO HAVE SLIGHTLY ABOVE NORMAL TO MUCH ABOVE NORMAL STRE�LMFLOWS IF "'COLORADO +4 abundani supply +2 near normal AVERAGE PRECIPITATION OCCURS DURING MARCH AND APRIL. ALL FORECASTS ARE A JOINT -2 -3 Emoderote drought EFFORT OF THE SOIL CONSERVATION SERVICE AND THE NATIONAL WEATHER SERVICE. GUNNISON $ever* drought -4 me drought COLORADO SNOWPACK STATISTICS ARE DOWN 17% FROM FEBRUARY 1, AND ARE L ARKANSAS 1 /. OF AVERAGE STATEWIDE AND 151% OF LAST YEAR. THE HIGHEST SNOIvRACK W RIO GRANDE STATISTIC OCCURS IN THE ARKANSAS RIVER BASIN AT 149% FOLLOWED BY THE GUNNISCN AND COLORADO BASINS AT 144% AND 139% OF AVERAGE RESPECTIVELY. THE NORTHVEST PORTION ;t OF COLORADO IN THE YAMPA RIVER BASIN HAS THE LOWEST SNOWPACK AT 14% ABOVE AVERAGE DOLORES SNOWMELT RUNOFF VOLUMES FOR THE APRIL-SEPTEMBER PERIOD SHOW ALL AREAS ARE NORMAL SAN JU4N a COLORADO TO MUqH ABOVE NORMAL CURRENTLY. STREAMFLOW VOLUMES RANGE FROM A LOW OF 14% ABOVE XVERAGE TO A HIGH OF 60% ABOVE AVERAGE. RESERVOIR STORAGE IS 150% OF AVERAGE. The Surface Water Supply Index (SWSI) is a weighted value derived for each NEW MEXICO STATEWIDE SNOWPACK IS CURRENTLY 133% OF AVERAGE AND 105% major basin which generally expresses the potential availability of the forthcoming season's water supply. The components used in computing the OF LAST YEAR. THIS IS A 34% DROP FROM FEBRUARY 1 READING. LOW index are reservoir storage, snowpack water equivalent, and precipitation. The SWSI number for each basin ranges from a -4.00 (prospective water ELEVATION PRECIPITATION WAS GENERALLY BELOW AVERAGE WITH THE EXCEPTION OF PECOS supplies extremely poor) to a +4.00 (prospective water supplies plentiful) . The SWSI number is only a general indicator of surface water supply condi- kT 199% OF AVERAGE FOR THE MONTH. STREAMFLOW VOLUMES RANGE FROM A LOW OF 110% OF tions. Further data analyses may be required in specific situations to more fully understand the impacts of abnormally dry or wet conditions suggested kVERAGE ON THE JEMEZ RIVER TO A HIGH OF 160% OF AVERAGE ON THE RIO GRANDE AT by the SWSI. Development of the SWSI has been a cooperative effort between the Colorado State Engineers' Office and the Soil Conservation Service. SAN MARCIAL. THE QUANTITY OF STORED WATER IN THE STATE'S MAJOR RESERVOIRS IS 232% OF AVERAGE, DOWN 5% FROM FEBRUARY 1 MEASUREMENTS. "" The Conservation of Water begins icith the Snow Snrre.y" iw�_:�MmEl't-110 7 UWA SCS PWTLAWj ON 1981