Missouri Basin River Forecast Center
Water Supply Statement
Issued in cooperation with the Natural
Resources Conservation Service
Issued:  September 11, 2007


PRECIPITATION RANGED FROM BELOW AVERAGE ACROSS THE NORTHERN PORTION
OF THE MISSOURI BASIN TO ABOVE AVERAGE ACROSS THE SOUTHERN PORTION.
STREAMFLOW DATA INDICATES THE FLOWS FOR AUGUST WERE BELOW AVERAGE.

PRECIPITATION IN MONTANA WAS BELOW AVERAGE WITH AMOUNTS RANGING
FROM 0 PERCENT OF AVERAGE (0.00 IN.) AT PRYOR 3E, MONTANA TO
315 PERCENT OF AVERAGE (3.46 IN.) AT BIDDLE, MONTANA. PRECIPITATION
IN WYOMING WAS GENERALLY NEAR AVERAGE. REPORTS RANGED FROM 17
PERCENT OF AVERAGE (0.08 IN.) AT WORLAND 12N, WYOMING
TO 352 PERCENT OF AVERAGE (2.57 IN.) AT CASPER, WYOMING.
PRECIPITATION IN NORTHEASTERN COLORADO WAS ABOVE AVERAGE, WITH
REPORTS RANGING FROM 41 PERCENT OF AVERAGE (1.10 IN.)
AT NIWOT, CO TO 257 PERCENT OF AVERAGE (3.60 IN.) AT FORT COLLINS,
COLORADO.


BASIN PRECIPITATION SUMMARIES FOR THE MISSOURI BASIN:


BASIN AVERAGE PRECIPITATION
MILK ST. MARY                                    30%
MILK CANADA                                     50%
ABOVE TOSTON                                 67%
TOSTON TO FT. PECK                       44%
LOWER MILK                                        64%
UPPER YELLOWSTONE                    76%
WIND RIVER                                        139%
BIGHORN                                             107%
LITTLE BIGHORN TONGUE                60%
POWDER                                             126%
LOWER YELLOWSTONE                   57%
UPPER NORTH PLATTE                  127%
LOWER NORTH PLATTE                 106%
NORTH PLATTE PLAINS                  104%
SOUTH PLATTE MOUNTAINS         143%
SOUTH PLATTE PLAINS                  153%




August 2007 Basin Mean Precipitation

OF THE FOUR MAJOR IRRIGATION RESERVOIRS IN MONTANA, LIMA
RESERVOIR HAD 34 PERCENT AVERAGE STORAGE; CLARK CANYON WAS
HOLDING 51 PERCENT OF AVERAGE WATER, GIBSON RESERVOIR HAD
15 PERCENT OF AVERAGE STORED WATER AND FRESNO RESERVOIR HAD
95 PERCENT OF AVERAGE STORED WATER. OF THE THREE MAJOR
HYDROELECTRIC RESERVOIRS IN MONTANA, CANYON FERRY AND FORT
PECK HAD MONTHEND STORAGE IN THE AVERAGE RANGE; 93 AND 55
PERCENT OF AVERAGE WATER, RESPECTIVELY. BIGHORN RESERVOIR
WAS HOLDING 103 PERCENT OF AVERAGE STORED WATER.

RUNOFF DURING AUGUST, AS INDICATED BY U.S. GEOLOGICAL SURVEY LONG
TERM GAGING STATIONS, WAS BELOW AVERAGE. THE MARIAS RIVER NEAR
SHELBY, MONTANA HAD 20 PERCENT OF AVERAGE RUNOFF. THE YELLOWSTONE
RIVER WAS ESTIMATED TO HAVE HAD 49 PERCENT OF AVERAGE RUNOFF AT
CORWIN SPRINGS, WHILE AT BILLINGS, MONTANA RUNOFF WAS 38 PERCENT OF
AVERAGE.


      

          Precipitation Maps

 
      August 2007       Oct-Aug WY 2007

                          

August 2007 Precipitation Percent of 1971-2000 Average  Oct-Aug WY2007 Precipitation as Percent of 1971-2000 Average


August 2007 Basin Mean Precipitation                    Oct-Aug WY2007 Basin Mean Precipitation

                               

August 2007 MBRFC Basin Mean Precipitation              Oct-Aug WY2007 MBRFC Basin Mean Precipitation


 

 


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