Wednesday, June 15, 2011

Too soon to say that rivers have peaked

There has been much in the news this week about our rivers being past their peak flows for the season.

Not so fast!

The high elevation portions of our watersheds melted next to nothing during the month of May. They're just now getting started. While temperatures may continue to play nice, there's every chance that a couple of days of warmth could cause surprise surges in streamflow.

Don't believe us? Take a look at the 1957 hydrographs - a year with a giant snowpack (but not as big as this year's) and a cold May. That year, the peak runoff didn't happen until the very end of June. Here's Middle Boulder Creek at Nederland as an example.

BODMIDCO - this year (red) vs. 1957 (green)