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FGUS75 KSLC 082004 CCB
ESFSLC

HYDROLOGIC OUTLOOK
NATIONAL WEATHER SERVICE SALT LAKE CITY UTAH
WATER SUPPLY SUMMARY
200 PM MDT MON JUN 8 2009

                  UTAH RIVERS ON THE DECLINE

UTAH'S RIVERS FED BY SPRING SNOWMELT RUNOFF ARE ON THE DECLINE. 
MOUNTAIN SNOWPACKS HAVE MELTED TO THE POINT WHERE THEY CANNOT FUEL 
HIGHER RIVER FLOWS THIS SPRING. PEAK FLOWS FOR MOST RIVERS OCCURRED 
AROUND MAY 25TH WHERE A LARGE SNOWPACK WAS MELTING AT A RATE OF 2 
INCHES OF WATER PER DAY.  ADDITIONALLY...THE COOLER TEMPERATURES 
RECORDED THIS SPRING HAVE DAMPENED PEAK FLOWS AND SOMEWHAT ELONGATED 
THE MELT SEASON.  OVERALL...THIS SPRING HAS SEEN AN ABSENCE OF HIGH 
PEAK FLOWS DUE TO THE ABSENCE OF EXTREME HEATING EVENTS.

COPIOUS RAINFALL AMOUNTS ACROSS NORTHERN UTAH THIS SPRING HAVE 
TEMPORARILY INCREASED STREAMFLOW VOLUMES...BUT THESE INCREASES HAVE 
BEEN NOMINAL AND TEMPORARY.  HOWEVER...THE INCREASED PRECIPITATION 
VOLUMES HAS OFFSET THE NEED FOR STORED IRRIGATION WATER.  

THE MAJORITY OF UTAH'S RESERVOIRS ARE FULL AT THIS TIME. THE TWO 
LARGER RESERVOIRS THAT DID NOT FILL ARE BEAR LAKE AND LAKE POWELL.  
BOTH OF THESE WATER BODIES WILL REQUIRE MULTIPLE YEARS OF NORMAL TO 
ABOVE NORMAL INFLOW TO OFFSET THE LARGE DEFICITS.  LAKE POWELL HAS 
RISEN 23 FEET THIS SPRING...AND IS CURRENTLY RISING ABOUT A HALF 
FOOT PER DAY. THIS RATE OF INCREASE IS EXPECTED TO DECLINE BY 
MID-JUNE.

ALTHOUGH STREAMFLOW VOLUMES ARE DECLINING...MOST WATERWAYS ARE 
FORECAST TO FLOW AT DANGEROUS LEVELS THROUGHOUT JUNE.  AS 
SUCH...THEY CONTINUE TO BE A VERY REAL THREAT.  WATER TEMPERATURE IN 
MOST MOUNTAIN STREAMS ARE JUST ABOVE FREEZING AND VERY TURBULENT. 
PLEASE KEEP AN EYE ON ANY CHILDREN WHO MAY BE DRAWN TO THESE 
DANGEROUS WATERS.

ADDITIONAL PRODUCTS WILL BE ISSUED AS CONDITIONS EVOLVE.


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MCINERNEY