Missouri Basin River Forecast Center
Water Supply Statement
Issued in cooperation with the Natural
Resources Conservation Service
Issued:  October 10, 2007


PRECIPITATION RANGED FROM BELOW AVERAGE ACROSS YELLOWSTONE BASIN,
AVERAGE TO ABOVE AVERAGE IN THE SOUTH PLATTE BASIN AND ABOVE AVERAGE
IN THE MISSOURI BASIN ABOVE FT. PECK, MONTANA. STREAMFLOW DATA
INDICATES THE FLOWS FOR SEPTEMBER WERE BELOW AVERAGE.

PRECIPITATION IN MONTANA RANGED FROM MUCH ABOVE AVERAGE TO MUCH BELOW
AVERAGE WITH AMOUNTS RANGING FROM 18 PERCENT OF AVERAGE (0.24 IN.) AT
REDSTONE, MONTANA TO 163 PERCENT OF AVERAGE (3.90 IN.) AT BLACK BEAR
(SNOTEL SITE), MONTANA. PRECIPITATION IN WYOMING LIKE MONTANA RANGED
FROM MUCH ABOVE AVERAGE TO MUCH BELOW AVERAGE. REPORTS RANGED FROM 19
PERCENT OF AVERAGE (0.14 IN.) AT LOVELL, WYOMING TO 253 PERCENT OF
AVERAGE (2.57 IN.) AT DIVIDE PEAK (SNOTEL SITE), WYOMING. PRECIPITATION
IN NORTHEASTERN COLORADO WAS AVERAGE TO BELOW AVERAGE, WITH REPORTS
RANGING FROM 32 PERCENT OF AVERAGE (0.39 IN.) AT FORT MORGAN 2S,
COLORADO TO 189 PERCENT OF AVERAGE (5.30 IN.) AT JOE WRIGHT (SNOTEL
SITE), COLORADO.


BASIN PRECIPITATION SUMMARIES FOR THE MISSOURI BASIN:

BASIN AVERAGE PRECIPITATION
MILK ST. MARY                                        161%
MILK CANADA                                          180%
ABOVE TOSTON                                      132%
TOSTON TO FT. PECK                            122%
LOWER MILK                                               81%
UPPER YELLOWSTONE                           79%
WIND RIVER                                                 87%
BIGHORN                                                      58%
LITTLE BIGHORN TONGUE                       84%
POWDER                                                      63%
LOWER YELLOWSTONE                           73%
UPPER NORTH PLATTE                          190%
LOWER NORTH PLATTE                         107%
NORTH PLATTE PLAINS                           72%
SOUTH PLATTE MOUNTAINS                  82%
SOUTH PLATTE PLAINS                           73%




September 2007 Basin Mean Precipitation

OF THE FOUR MAJOR IRRIGATION RESERVOIRS IN MONTANA, LIMA
RESERVOIR HAD 43 PERCENT AVERAGE STORAGE; CLARK CANYON WAS
HOLDING 89 PERCENT OF AVERAGE WATER, GIBSON RESERVOIR HAD
21 PERCENT OF AVERAGE STORED WATER AND FRESNO RESERVOIR HAD
78 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; 89 AND 55
PERCENT OF AVERAGE WATER, RESPECTIVELY. BIGHORN RESERVOIR
WAS HOLDING 98 PERCENT OF AVERAGE STORED WATER. IN WYOMING
BOYSEN WAS HOLDING 52 PERCENT OF AVERAGE STORAGE WHILE BUFFALO
BILL RESERVOIR WAS 95 PERCENT OF AVERAGE. THE TOTAL STORED WATER
IN THE NORTH PLATTE BASIN WAS 42 PERCENT OF AVERAGE. IN THE
SOUTH PLATTE BASIN IN COLORADO STORED WATER WAS 99 PERCENT OF
AVERAGE ON OCTOBER 1.

RUNOFF DURING SEPTEMBER, AS INDICATED BY U.S. GEOLOGICAL SURVEY LONG
TERM GAGING STATIONS, WAS BELOW AVERAGE. THE MARIAS RIVER NEAR
SHELBY, MONTANA HAD 28 PERCENT OF AVERAGE RUNOFF. THE YELLOWSTONE
RIVER WAS REPORTED TO HAVE HAD 58 PERCENT OF AVERAGE RUNOFF AT
CORWIN SPRINGS, WHILE AT BILLINGS, MONTANA RUNOFF WAS 49 PERCENT OF
AVERAGE.

     

          Precipitation Maps

 
      September 2007       Oct-Sep WY 2007

                          

September 2007 Precipitation Percent of 1971-2000 Average  Oct-Sep WY2007 Precipitation as Percent of 1971-2000 Average


September 2007 Basin Mean Precipitation                    Oct-Sep WY2007 Basin Mean Precipitation

                               

September 2007 MBRFC Basin Mean Precipitation              Oct-Sep WY2007 MBRFC Basin Mean Precipitation


 

 


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