April 1st Water Supply Outlook

April 1st Runoff Volume Forecasts (Percent of Normal)
WATER SUPPLY OUTLOOK
NATIONAL WEATHER SERVICE PUEBLO CO
1200 PM MDT WED APR 7 2010

...WATER SUPPLY OUTLOOK FOR SOUTH CENTRAL AND SOUTHEAST COLORADO AS
OF APRIL 1 2010...

SNOWPACK
AS OF APRIL 1...THE 2010 SNOWPACK WAS GENERALLY RUNNING ABOVE
AVERAGE. IN THE UPPER RIO GRANDE BASIN...THE SNOWPACK WAS AT 115
PERCENT OF AVERAGE OVERALL...UP FROM 109 PERCENT OF AVERAGE LAST
MONTH AT THIS TIME...AND TRACKING AHEAD OF LAST YEARS 97 PERCENT OF
AVERAGE AT THIS TIME. IN THE ARKANSAS BASIN...THE SNOWPACK WAS AT
104 PERCENT OF AVERAGE OVERALL...UP FROM 95 PERCENT OF AVERAGE LAST
MONTH AT THIS TIME...AND TRACKING AHEAD OF THE SNOWPACK LAST YEAR AT
THIS TIME WHICH WAS 96 PERCENT OF AVERAGE.

PRECIPITATION
BOTH THE RIO GRANDE AND ARKANSAS BASINS SAW ABOVE AVERAGE
PRECIPITATION LAST MONTH. THE RIO GRANDE BASIN REPORTED 105 PERCENT
OF AVERAGE PRECIPITATION...WHILE THE ARKANSAS BASIN REPORTED 131
PERCENT OF AVERAGE PRECIPITATION. WATER YEAR PRECIPITATION IN THE
RIO GRANDE AND ARKANSAS BASINS IS NOW AT 105 PERCENT OF
AVERAGE...AND 100 PERCENT OF AVERAGE...RESPECTIVELY.

RESEVOIR STORAGE
OVERALL RESERVOIR STORAGE IS GENERALLY RUNNING NEAR AVERAGE ACROSS
SOUTHERN COLORADO. STORAGE IN THE RIO GRANDE BASIN ON APIRL 1ST WAS
AT 90 PERCENT OF AVERAGE OVERALL...COMPARED TO 87 PERCENT OF AVERAGE
LAST YEAR AT THIS TIME. IN THE ARKANSAS BASIN...STORAGE WAS AT 107
PERCENT OF AVERAGE OVERALL...COMPARED TO 94 PERCENT OF AVERAGE LAST
YEAR AT THIS TIME.

RIO GRANDE STREAMFLOW FORECASTS
STREAMFLOW VOLUMES FOR THE RUNOFF SEASON ARE GENERALLY OUTLOOKED TO
RANGE FROM A LITTLE BELOW AVERAGE OVER NORTHERN PORTIONS OF THE
RIO GRANDE BASIN TO A LITTLE ABOVE AVERAGE OVER SOUTHERN PORTIONS.
FOLLOWING ARE STREAMFLOW FORECASTS FOR SELECTED LOCATIONS IN THE
UPPER RIO GRANDE BASIN ASSUMING NORMAL PRECIPITATION DURING THE
NEXT FEW MONTHS:

LOCATION                   % OF AVERAGE     RUNOFF PERIOD

RIO GRANDE RIVER
THIRTY MILE BRIDGE 91 APR-SEP
WAGON WHEEL GAP 93 APR-SEP
NEAR DEL NORTE 94 APR-SEP
SOUTH FORK RIO GRANDE RIVER
SOUTH FORK 95 APR-SEP
SAGUACHE CREEK
NEAR SAGUACHE 94 APR-SEP
ALAMOSA CREEK
TERRACE RESERVOIR INFLOW 96 APR-SEP
LA JARA CREEK
NEAR CAPULIN 95 MAR-JUL
TRINCHERA CREEK
ABOVE TURNERS RANCH 117 APR-SEP
CONEJOS RIVER
PLATORO RESERVOIR INFLOW 93 APR-SEP
NEAR MOGOTE 100 APR-SEP
CULEBRA CREEK
SAN LUIS 130 APR-SEP
SAN ANTONIO RIVER
ORTIZ 98 APR-SEP
LOS PINOS
ORTIZ 100 APR-SEP

ARKANSAS STREAMFLOW FORECASTS
STREAMFLOW VOLUMES FOR THE RUNOFF SEASON ARE GENERALLY OUTLOOKED TO
RANGE FROM A LITTLE BELOW AVERAGE OVER NORTHERN PORTIONS OF THE
ARKANSAS BASIN TO A LITTLE ABOVE AVERAGE OVER SOUTHERN PORTIONS.
FOLLOWING ARE STREAMFLOW FORECASTS FOR SELECTED LOCATIONS IN THE
ARKANSAS BASIN ASSUMING NORMAL PRECIPITATION DURING THE NEXT FEW
MONTHS:

LOCATION                   % OF AVERAGE     RUNOFF PERIOD

ARKANSAS RIVER
GRANITE 88 APR-SEP
SALIDA 95 APR-SEP
CANON CITY 98 APR-SEP
ABOVE PUEBLO 96 APR-SEP
CHALK CREEK
NEAR NATHROP 93 APR-SEP
GRAPE CREEK
NEAR WESTCLIFFE 117 APR-SEP
HUERFANO RIVER
NEAR REDWING 129 APR-SEP
CUCHARAS RIVER
NEAR LA VETA 131 APR-SEP
PURGATOIRE RIVER
TRINIDAD 116 APR-SEP

NATURAL FLOW ONLY
THESE FORECASTS REFLECT NATURAL FLOW ONLY.  ACTUAL OBSERVED FLOW
WILL LIKELY BE AFFECTED BY UPSTREAM WATER MANAGEMENT.

ASSUMPTIONS
THIS OUTLOOK IS BASED ON RECENT OBSERVATIONS OF SNOWPACK AND ASSUMES
NORMAL PRECIPITATION FOR THE REMAINDER OF THE SNOW SEASON. IF THE
ACTUAL OBSERVED PRECIPITATION DEVIATES FROM NORMAL...THEN THE ACTUAL
OBSERVED RUNOFF WILL LIKELY BE DIFFERENT THAN THE FORECASTS IN THIS
OUTLOOK. AN UPDATED OUTLOOK WILL BE ISSUED IN EARLY MAY.

CONTINUE MONITORING
USERS OF THIS PRODUCT ARE ENCOURAGED TO CONTACT THE NATIONAL WEATHER
SERVICE IN PUEBLO FOR CONTINUED UPDATES ON THE WATER SUPPLY
SITUATION. METEOROLOGICAL CONDITIONS COULD DEVELOP THAT WOULD HAVE
A SIGNIFICANT IMPACT ON WATER SUPPLY FORECASTS.

ADDITIONAL INFORMATION
FOR ADDITIONAL HYDROLOGIC PRODUCTS AVAILABLE ON THE WORLD WIDE
WEB...VISIT THE PUEBLO NATIONAL WEATHER SERVICE WEB SITE AT
WEATHER.GOV/PUB.

CREDITS
THIS MESSAGE IS THE RESULT OF COORDINATED ACTIVITY BETWEEN THE
NATIONAL WEATHER SERVICE AND THE NATURAL RESOURCES CONSERVATION
SERVICE.


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