Most of the Missouri basin reported below average precipitation
during the month of June. Also, streamflow data indicates the
flows for June were below average.
Precipitation in Montana was below average with amounts ranging
from 9 percent of average (0.23 in.) at Cut Bank 3SSW, Montana to
289 percent of average (6.39 in.) Hardin 34SSW, Montana. Precipitation
in Wyoming was generally below average with near average precipitation
being reported across the Powder and Little Bighorn Tongue basins.
Reports ranged from 0 percent of average (0.00 in.) at several
locations across Wyoming to 189 percent of average (2.32 in.)
at Powell 23NW, Wyoming. Precipitation in northeastern Colorado was
below average, with reports ranging from 0 percent of average (0.00 in.)
at several locations across the state to 154 percent of average
(3.90 in.) at Wray 2E, Colorado.
Basin precipitation summaries for the Missouri Basin:
Basin Average Precipitation
Milk St. Mary 44%
Milk Canada 52%
Above Toston 74%
Toston to Ft. Peck 75%
Lower Milk 93%
Upper Yellowstone 86%
Wind River 59%
Bighorn 75%
Little Bighorn Tongue 112%
Powder 103%
Lower Yellowstone 101%
Upper North Platte 53%
Lower North Platte 51%
North Platte Plains 17%
South Platte Mountains 40%
South Platte Plains 49%
June 2007 Basin Mean Precipitation
Stored water in the South Platte Basin as of July 1 was 93
percent of average for this time of the year. Stored water in the
North Platte Basin was MISSING of average July 1 storage. Buffalo Bill
Reservoir held 102 percent of average July 1 storage. Of the four
major irrigation reservoirs in Montana, Lima Reservoir had 74 percent
average storage; Clark Canyon was holding 63 percent of average water,
Gibson Reservoir had 81 percent of average stored water and Fresno
Reservoir had 85 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; 99 and 56 percent of average water,
respectively. Bighorn reservoir was holding 102 percent of average
stored water.
