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LongTermOutlookJan2005
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Last modified
9/27/2011 3:26:43 PM
Creation date
9/30/2006 10:20:37 AM
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Template:
Drought Mitigation
Title
Seasonal Outlook for the first half of 2005
Date
1/18/2005
Description
Presentation
Basin
Statewide
Drought Mitigation - Doc Type
Presentation
Document Relationships
ClimateUpdateJan2005
(Message)
Path:
\Drought Mitigation\Backfile
SWSIReportJan2005
(Message)
Path:
\Drought Mitigation\Backfile
WATFAgendaJan2005
(Message)
Path:
\Drought Mitigation\Backfile
WATFSummaryJan2005
(Message)
Path:
\Drought Mitigation\Backfile
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<br />Executive Summary (18 January 2005) <br /> <br />1. The 2004-05 EI Nino event continues to limp along, with large-scale SST anomalies that barely <br />exceed I C (2F). Nevertheless, quite a few global and regional precipitation anomalies have been <br />consistent with typical EI Nino-associations (for instance, a failed summer monsoon in India, a dry <br />fall in Indonesia, and a wet (dry) fall in the southwestern (northwestern) U.S.). <br /> <br />2. After a wet summer and fall in the eastern half of Colorado (western Colorado only caught up in the <br />fall), our snowpack has been flirting with "normal" values over the last months, a welcome change <br />compared to recent years. Of course, this recovery is a far cry from the almost biblical precipitation <br />events recorded over Utah and points southwest this fall. Meanwhile, the expected early-winter dry <br />spells appear to recur regularly, and are on tap yet again for the next two weeks. <br /> <br />3. In my experimental forecasts for Jan-Mar '05, the odds for above-normal precipitation reach <br />significant levels only over the north-central mountains of Colorado, while weaker reverse odds <br />apply to northern Utah and east Colorado. The wet forecast for north-central Colorado is considered <br />more reliable than other forecasts. A first look at the subsequent spring season (April-June) <br />continues the recent tendency towards wet conditions in New Mexico, but raises the possibility of <br />renewed dry spells in southwest Utah and eastern Colorado. <br /> <br />4. Boltomline: EI Nino has returned to the Pacific, but is weaker than many historic events, and <br />appears to focus on the central rather than the eastern basin. Its recent influence on our climate is <br />debatable. In fact, my "wet" forecast for the north-central mountains of Colorado is not directly <br />driven by the EI Nino, but eastern Pacific SST developments largely independent of it. If the current <br />EI Nino event does not fade away too soon, the currently mixed odds for a wet spring would <br />improve for both Utah and Colorado. <br />
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