NWS Missouri River Basin/Pleasant Hill, MO

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	WY 2007
August 2007 Precipitation Percent of 1971-2000 Average	WY2007 Precipitation as Percent of 1971-2000 Average
August 2007 Basin Mean Precipitation	WY2007 Basin Mean Precipitation
August 2007 MBRFC Basin Mean Precipitation	WY2007 MBRFC Basin Mean Precipitation