Water Year 2011: Review of Conditions and Forecasts in the Colorado River Basin
description
Transcript of Water Year 2011: Review of Conditions and Forecasts in the Colorado River Basin
![Page 1: Water Year 2011: Review of Conditions and Forecasts in the Colorado River Basin](https://reader035.fdocuments.us/reader035/viewer/2022081515/56813fd7550346895daabc56/html5/thumbnails/1.jpg)
Water Year 2011: Review of Conditions and Forecasts
in the Colorado River Basin
CRFS November 8, 2011
![Page 2: Water Year 2011: Review of Conditions and Forecasts in the Colorado River Basin](https://reader035.fdocuments.us/reader035/viewer/2022081515/56813fd7550346895daabc56/html5/thumbnails/2.jpg)
La Nina
Sources: cpc.ncep.noaa.gov and iri.columbia.edu/climate/ENSO
![Page 3: Water Year 2011: Review of Conditions and Forecasts in the Colorado River Basin](https://reader035.fdocuments.us/reader035/viewer/2022081515/56813fd7550346895daabc56/html5/thumbnails/3.jpg)
![Page 4: Water Year 2011: Review of Conditions and Forecasts in the Colorado River Basin](https://reader035.fdocuments.us/reader035/viewer/2022081515/56813fd7550346895daabc56/html5/thumbnails/4.jpg)
La Nina and the Upper Colorado
• Some analyses (e.g. Klaus Wolter, right) have shown seasonal teleconnections to precipitation in the Upper Colorado basin
• Possible tendency toward drier fall and spring and wetter winters in La Nina
Credit: Klaus Wolter http://wwa.colorado.edu/IWCS/2010_October.html
![Page 5: Water Year 2011: Review of Conditions and Forecasts in the Colorado River Basin](https://reader035.fdocuments.us/reader035/viewer/2022081515/56813fd7550346895daabc56/html5/thumbnails/5.jpg)
U.S. Precipitation Departures (mm) and Frequency of Occurrence (%)
for La Niña during Oct.-Dec.
FREQUENCY (right panel) indicates the percentage of La Niña years that the indicated departure (left panel) occurred. For example, below-average seasonal precipitation over the Middle Mississippi Valley occurred in 70%-90% of the La Niña years.
![Page 6: Water Year 2011: Review of Conditions and Forecasts in the Colorado River Basin](https://reader035.fdocuments.us/reader035/viewer/2022081515/56813fd7550346895daabc56/html5/thumbnails/6.jpg)
U.S. Precipitation Departures (mm) and Frequency of Occurrence (%)
for La Niña during Dec.-Feb.
Source: cpc.ncep.noaa.gov
![Page 7: Water Year 2011: Review of Conditions and Forecasts in the Colorado River Basin](https://reader035.fdocuments.us/reader035/viewer/2022081515/56813fd7550346895daabc56/html5/thumbnails/7.jpg)
U.S. Precipitation Departures (mm) and Frequency of Occurrence (%)
for La Niña during Mar.-May
Source: cpc.ncep.noaa.gov
![Page 8: Water Year 2011: Review of Conditions and Forecasts in the Colorado River Basin](https://reader035.fdocuments.us/reader035/viewer/2022081515/56813fd7550346895daabc56/html5/thumbnails/8.jpg)
CPC Precipitation Outlooks
![Page 9: Water Year 2011: Review of Conditions and Forecasts in the Colorado River Basin](https://reader035.fdocuments.us/reader035/viewer/2022081515/56813fd7550346895daabc56/html5/thumbnails/9.jpg)
![Page 10: Water Year 2011: Review of Conditions and Forecasts in the Colorado River Basin](https://reader035.fdocuments.us/reader035/viewer/2022081515/56813fd7550346895daabc56/html5/thumbnails/10.jpg)
WY 2011 Monthly Precipitation
![Page 11: Water Year 2011: Review of Conditions and Forecasts in the Colorado River Basin](https://reader035.fdocuments.us/reader035/viewer/2022081515/56813fd7550346895daabc56/html5/thumbnails/11.jpg)
Spring 2011, Monthly PrecipitationApril May
![Page 12: Water Year 2011: Review of Conditions and Forecasts in the Colorado River Basin](https://reader035.fdocuments.us/reader035/viewer/2022081515/56813fd7550346895daabc56/html5/thumbnails/12.jpg)
Spring 2011, Monthly PrecipitationJune July
![Page 13: Water Year 2011: Review of Conditions and Forecasts in the Colorado River Basin](https://reader035.fdocuments.us/reader035/viewer/2022081515/56813fd7550346895daabc56/html5/thumbnails/13.jpg)
Spring and Summer Temperature Departures from Average Maximum
April and May departures were the most extreme at > 7 degrees F below normal. Cool temperatures continued though July.
![Page 14: Water Year 2011: Review of Conditions and Forecasts in the Colorado River Basin](https://reader035.fdocuments.us/reader035/viewer/2022081515/56813fd7550346895daabc56/html5/thumbnails/14.jpg)
Daily SWE Records, 2011
![Page 15: Water Year 2011: Review of Conditions and Forecasts in the Colorado River Basin](https://reader035.fdocuments.us/reader035/viewer/2022081515/56813fd7550346895daabc56/html5/thumbnails/15.jpg)
![Page 16: Water Year 2011: Review of Conditions and Forecasts in the Colorado River Basin](https://reader035.fdocuments.us/reader035/viewer/2022081515/56813fd7550346895daabc56/html5/thumbnails/16.jpg)
![Page 17: Water Year 2011: Review of Conditions and Forecasts in the Colorado River Basin](https://reader035.fdocuments.us/reader035/viewer/2022081515/56813fd7550346895daabc56/html5/thumbnails/17.jpg)
![Page 18: Water Year 2011: Review of Conditions and Forecasts in the Colorado River Basin](https://reader035.fdocuments.us/reader035/viewer/2022081515/56813fd7550346895daabc56/html5/thumbnails/18.jpg)
![Page 19: Water Year 2011: Review of Conditions and Forecasts in the Colorado River Basin](https://reader035.fdocuments.us/reader035/viewer/2022081515/56813fd7550346895daabc56/html5/thumbnails/19.jpg)
![Page 20: Water Year 2011: Review of Conditions and Forecasts in the Colorado River Basin](https://reader035.fdocuments.us/reader035/viewer/2022081515/56813fd7550346895daabc56/html5/thumbnails/20.jpg)
![Page 21: Water Year 2011: Review of Conditions and Forecasts in the Colorado River Basin](https://reader035.fdocuments.us/reader035/viewer/2022081515/56813fd7550346895daabc56/html5/thumbnails/21.jpg)