Oct 2010 Intermountain West Climate Summary
Temperature — Nearly all locations across the Intermountain West region had above-average temperatures for September, as there were few storms to bring cold air or much moisture.
Precipitation — September was a very dry month for the region, with a large swath across all three states seeing less than 0.25\" of precipitation.
ENSO — A strong La Niña event has developed, and is expected to persist at least through spring 2011, influencing the climate outlook for our region throughout this period.
Climate Outlooks — For November and subsequent seasons, the CPC seasonal outlooks call for an enhanced probability of warmer-than-average temperatures and an enhanced probability
of below-average precipitation for the southern portions of the Intermountain West, consistent with typical La Niña conditions.
WWA supported-study: Dust-on-snow reduces annual flow of Colorado River by 5%
A study led by Western Water Assessment team members Tom Painter, Jeff Deems, and Brad Udall has quantified the hydrologic impact of recent dust deposition on snowpacks in the Colorado River basin.
Changes in WWA and IWCS staff
ENSO and Intermountain West Water Supply: A Review of WY 2010 and Outlook for WY 2011
by Klaus Wolter, CIRES, NOAA/ESRL/PSD and WWA, and Jeff Lukas, WWA
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