Missouri Basin River Forecast Center
Water Supply Statement
Issued in cooperation with the Natural
Resources Conservation Service
Issued:  July 10, 2012


UPPER MISSOURI BASIN

 

JUNE PRECIPITATION RANGED FROM ABOVE TO BELOW AVERAGE ACROSS THE UPPER MISSOURI
BASIN. BASIN PRECIPITATION SUMMARIES FOR THE MISSOURI BASIN INCLUDE:
MILK ST. MARY, 133 PERCENT; MILK CANADA, 137 PERCENT; LOWER MILK, 84
PERCENT; ABOVE TOSTON, 44 PERCENT; TOSTON TO FT. PECK, 77 PERCENT.

OF THE FOUR MAJOR IRRIGATION RESERVOIRS IN MONTANA: LIMA RESERVOIR
HAD 158 PERCENT AVERAGE STORAGE, CLARK CANYON WAS HOLDING 86 PERCENT OF
AVERAGE WATER, GIBSON RESERVOIR HAD 105 PERCENT OF AVERAGE STORED
WATER, AND FRESNO RESERVOIR HAD 118 PERCENT OF AVERAGE STORED WATER.
THE MAJOR HYDROELECTRIC RESERVOIRS IN MONTANA (CANYON FERRY AND
FORT PECK) HAD MONTHEND STORAGE IN THE ABOVE AVERAGE RANGE; 100 AND
99 PERCENT OF AVERAGE WATER, RESPECTIVELY.


 

YELLOWSTONE BASIN



PRECIPITATION DURING THE MONTH OF JUNE WAS ABOUT 7 PERCENT OF
AVERAGE IN THE WIND RIVER BASIN ABOVE BOYSEN RESERVOIR, 37 PERCENT
OF AVERAGE IN THE UPPER YELLOWSTONE BASIN, 21 PERCENT OF AVERAGE
IN THE BIGHORN BASIN, AND 27 PERCENT OF AVERAGE IN THE LITTLE
BIGHORN BASINS-UPPER TONGUE BASINS, 35 PERCENT OF AVERAGE IN THE
POWDER RIVER BASIN, AND 35 PERCENT OF AVERAGE IN THE LOWER
YELLOWSTONE BASIN.

MONTHEND STORAGE WAS 99 PERCENT OF AVERAGE AT BIGHORN RESERVOIR ON
THE WYOMING/MONTANA BORDER. MONTHEND STORAGE WAS NOT REPORTED AT
BOYSEN RESERVOIR OR AT BUFFALO BILL RESERVOIR IN WYOMING.



 

PLATTE BASIN



PRECIPITATION DURING JUNE IN THE PLATTE BASIN WAS BELOW
AVERAGE. JUNE PRECIPITATION IN THE NORTH PLATTE BASIN
ABOVE SEMINOE RESERVOIR WAS 7 PERCENT OF AVERAGE. IN THE
NORTH PLATTE BASIN BETWEEN SEMINOE RESERVOIR AND GUERNSY
RESERVOIR PRECIPITATION WAS 23 PERCENT OF AVERAGE. THE NORTH
PLATTE BASIN BELOW GUERNSY RESERVOIR HAD 71 PERCENT OF AVERAGE
PRECIPITATION. THE HIGH ELEVATIONS OF THE SOUTH PLATTE BASIN HAD
35 PERCENT OF AVERAGE JUNE PRECIPITATION WHEREAS THE PLAINS
HAD 48 PERCENT OF AVERAGE PRECIPITATION.

STORED WATER IN THE SOUTH PLATTE BASIN STORED WATER WAS 137 PERCENT
OF AVERAGE WITH INDIVIDUAL RESERVOIRS RANGING FROM 50 TO 920
PERCENT OF AVERAGE.






 

 

          Precipitation Maps

 

 
          June 2012                       Oct-June WY 2012

                          

June 2012 Precipitation Percent of 1971-2000 Average                  Oct-Jun  WY2012 Precipitation as Percent of 1971-2000 Average

 


June 2012 Basin Mean Precipitation                                             Oct-Jun WY2012 Basin Mean Precipitation

                               

June 2012 MBRFC Basin Mean Precipitation                               Oct-Jun WY2012 MBRFC Basin Mean Precipitation

 

 

 

 

 

 


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