Here’s the June 2011 Basin Outlook Report from the Natural Resources Conservation Service. Here’s an excerpt:
Weather patterns during May continued those established in late April, with intense storm activity across most of western and northern Colorado’s river basins. Coupled with the moisture was much cooler than normal temperatures which reduced snowmelt even at lower elevations in most basins. While the added moisture will continue to improve water supplies, now into late summer, temperatures in June will determine runoff rates. With the strong end to the snow accumulation season, 2011 will be one of the most productive runoff years in several decades. Just to remind us all that Colorado’s climate offers profuse variety, portions of the state are still expected to see runoff shortages from an extremely dry winter.