1. CBRFC April 2010 Water Supply Webinar 1pm, April 7, 2010 Kevin Werner These slides: www.cbrfc.noaa.gov/present/present.php PLEASE MUTE YOUR PHONES

2. Outline March Weather Review Snow States Water Supply Forecasts Web Reference: www.cbrfc.noaa.gov/wsup/pub2/map/html/cbrfc.3.2009.html

3. Web Reference: http://www.cbrfc.noaa.gov/precip/qpe/mapsum/mapsum.cgi??cbrfc?M?2009?02

4. Web Reference: http://www.cbrfc.noaa.gov/gmap/gmapm.php?scon=checked Snow: Mar 4 (above) Apr 6 (right)

5. Web Reference: http://www.cbrfc.noaa.gov/station/sweplot/sweplot.cgi???open Snow: Upper Green Basin (above Flaming Gorge)

6. Web Reference: http://www.cbrfc.noaa.gov/station/sweplot/sweplot.cgi???open Snow: Colorado Mainstem (above Cameo)

7. Web Reference: http://www.cbrfc.noaa.gov/station/sweplot/sweplot.cgi???open Snow: San Juan Basin

8. Web Reference: http://www.cbrfc.noaa.gov/station/sweplot/sweplot.cgi???open Snow: Bear River

9. Web Reference: http://www.cbrfc.noaa.gov/station/sweplot/sweplot.cgi???open Snow: Six Creeks in Salt Lake County

10. Web Reference: http://www.cbrfc.noaa.gov/station/sweplot/sweplot.cgi???open Snow: Lower Colorado

11. Last 7 days… Web Reference: http://water.weather.gov <- Last 30 days

12. Last 7 days

13. NRCS daily forecast update 7 day change scince April 1

14. Forecast Precipitation Web Reference: www.hpc.noaa.govwww.hpc.noaa.gov Mostly dry for the rest of this week and weekend Storm pattern expected for next week. Details still fuzzy but event could be significant for parts of the basin

15. Forecast Precipitation: Next Week’s Storm Current weather forecast model solutions for 14 day period precipitation totals: NOAA’s GFS (left) and European’s ECMWF (right). Both models show a major long wave trough affecting the southern half first (~Tues, 4/13) and then the northern half (~Thurs, 4/15).

16. El Nino Update Web Reference: http://www.cpc.noaa.gov and iri.columbia.edu/climate/ENSOhttp://www.cpc.noaa.gov

17. Web Reference: http://www.cbrfc.noaa.gov/climate/climoForecasts.cgi

18. Web Reference: www.cbrfc.noaa.gov/gmap/gmapm.php?wcon=checked April 1, 2010 Water Supply Forecasts Highlights: Dry conditions continue in much of the Upper Colorado and Great Basins Forecasts generally lower by 5-15% from March 1 in upper Colorado Basin Forecasts in northern Great Basin tempered by recent storm. Lower basin melt out underway

19. Web Reference: www.cbrfc.noaa.gov/gmap/gmapm.php?wcon=checked

24. 1580/50% 3340/72% 1050/85% Average contribution to Lake Powell Apr-Jul inflow: Green River-Green River, UT34% Colorado River-Cicso, UT50% San Juan River-Bluff, UT13% ESP 50% forecast guidance March 1March 29 no qpf – qpf Green R.17821522 – 1587 Colorado R.34753177 – 3235 San Juan R. 972 831 – 824

25. Web Reference: www.cbrfc.noaa.gov/gmap/gmapm.php?wcon=checked

29. Online Publication Web Reference: www.cbrfc.noaa.gov/wsup/pub2/map/html/cpub.php

30. April 1, 2010 Peak Flow Forecasts Highlights: Low flood risk potential in upper basin Lower basin at some risk if a significant precipitation event were to coincide with snow melt. Most streamflow recreation points not expected to reach minimum thresholds Weather patterns over the next 2 months will greatly influence actual peak flows Web Reference: www.cbrfc.noaa.gov/gmap/gmapm.php?pcon=checked

34. Email Updates: Automatic email update customized to what you need. http://www.cbrfc.noaa.gov/wsu p/govdelivery.html

35. More Resources www.cbrfc.noaa.gov Wateroutlook.nwrfc.noaa.gov Podcast versions of webinars available (CBRFC homepage -> podcasts Tentative May water supply & peak flow webinar: 10am May 7 Separate Peak Flow Forecast webinar as required or requested

36. CBRFC Open House Objective: Improve understanding / communication of forecast process and forecast usage August 18, 2010 Salt Lake City, UT More details to come www.cbrfc.noaa.gov/wsup/openhouse.html

37. Kevin Werner CBRFC Service Coordination Hydrologist Phone: 801.524.5130 Email: kevin.werner@noaa.govkevin.werner@noaa Feedback, Questions, Concerns always welcome….