U.S Drought Highlights Since U.S Drought Highlights Since October 2004 October 2004 Douglas Le Comte Douglas Le Comte NOAA/CPC NOAA/CPC 30 30 th th Annual Climate Diagnostics and Prediction Annual Climate Diagnostics and Prediction Workshop Workshop October 24-28, 2005 October 24-28, 2005
U.S Drought Highlights Since October 2004. Douglas Le Comte NOAA/CPC 30 th Annual Climate Diagnostics and Prediction Workshop October 24-28, 2005. Outline. Drought Highlights —Southwest Alleviation, Northwest Development, and Midwest Summer Development Drought Forecasts —How are we doing?. - PowerPoint PPT Presentation
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U.S Drought Highlights Since U.S Drought Highlights Since October 2004October 2004
Douglas Le ComteDouglas Le Comte
NOAA/CPCNOAA/CPC
3030thth Annual Climate Diagnostics and Prediction Workshop Annual Climate Diagnostics and Prediction Workshop
Although El Nino’s are generallyassociated with improved droughtconditions in the U.S. Southwest,this is by no means assured. The bestodds for improvement come withstronger events (SST anomaliesover +1.5 deg. C).
EL NINO’S and SOUTHWESTERN DROUGHTEL NINO’S and SOUTHWESTERN DROUGHT
Expected rangeof SSTs
Streamflow Forecasts April 1, 2005Streamflow Forecasts April 1, 2005
Spring-Summer ChangesSpring-Summer Changes
April vs July 2005April vs July 2005
Changes to October 4, 2005Changes to October 4, 2005
August vs October 2005August vs October 2005
October 4 vs October 11 2005October 4 vs October 11 2005
The Seasonal Drought OutlooksThe Seasonal Drought Outlooks
Selected Drought Outlook ToolsSelected Drought Outlook Tools
• 2-Week Soil Moisture2-Week Soil Moisture
• Seasonal Constructed Analog Soil ForecastsSeasonal Constructed Analog Soil Forecasts
• NCDC Palmer Drought Amelioration Probability MapsNCDC Palmer Drought Amelioration Probability Maps
• Better seasonal temp/precip forecasts thanks to Better seasonal temp/precip forecasts thanks to new consolidation toolnew consolidation tool
• Better seasonal soil moisture forecasts from Better seasonal soil moisture forecasts from NLDAS projects (Univ. of WA, Princeton, NCEP)NLDAS projects (Univ. of WA, Princeton, NCEP)
• Research leading to improved understanding of Research leading to improved understanding of the underlying causes of drought (e.g., air-sea and the underlying causes of drought (e.g., air-sea and ground-air interactions)ground-air interactions)
Parting WisdomParting Wisdom
• ““If you’re going to predict, predict often. If you’re going to predict, predict often. As long as you keep updating your As long as you keep updating your prediction, people forget your last prediction, people forget your last prediction.”prediction.”