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•Basin Conditions •River Forecasts •Water Supply
CBRFCApril 2009
Water Supply Webinar
1:00pm MDT, April 8, 2009
William B. Reed
Outline• March Weather
Review• April 7th Snow
States• Weather Forecast• April 1st Water
Supply Forecasts
Web Reference: www.cbrfc.noaa.gov/wsup/pub2/map/html/cbrfc.4.2009.html
Web Reference: http://www.cbrfc.noaa.gov/precip/qpe/mapsum/mapsum.cgi??cbrfc?M?2009?03
Web Reference: http://www.cbrfc.noaa.gov/gmap/gmap.php
Slightly Improved Conditions
The Same Or Drier Conditions
March 1st to April 7th
Passed Seasonal Snow Peak
Change between March 1st & April 7th
March
April
• In general, the snow conditions have slightly improved in the Northern Basins, less 75-90 more 90-110.
• About the same in headwaters of the San Juan River Basin.
• Drier in the Virgin River Basin.
Web Reference: http://www.cbrfc.noaa.gov/snow/station/sweplot/sweplot.cgi?LOPW4+KNDW4+NFLW4+EKPW4+TRPW4+GRVW4-Green+-+abv+Fontenelle?avg.2009.2008
2000 is closest using peak to date, a dry year (flow for 2000 is ranked 14th lowest out of 51 years)
Green - above Fontenelle Reservoir (lopw4 kndw4 nflw4 ekpw4 trpw4 grvw4)
April 7th
Web Reference: http://www.cbrfc.noaa.gov/snow/station/sweplot/sweplot.cgi?yrList=avg&yrList=2009&yrList=2008&stationList=EKPW4&stationList=GRVW4&stationList=KNDW4&stationList=LOPW4&stationList=NFLW4&stationList=TRPW4&monly=0&tavg=s&hsim=sknn&index=&dbsvr=&indextitle=Green+
Green - above Fontenelle Reservoir (lopw4 kndw4 nflw4 ekpw4 trpw4 grvw4)
Can zoom in. Also looking at the above plot we can see 2009 is not that different from 2008 (flow for 2008 is ranked 18th lowest out of 51 years).
April 7th
Web Reference: http://www.cbrfc.noaa.gov/snow/station/sweplot/sweplot.cgi?BLSC2+WLLC2+LKIC2+PHTC2+SCSC2+AROC2+BTSC2+HOOC2+CPMC2+SUMC2+FMTC2+VLMC2+IVHC2+KLNC2+IDPC2+SOSC2+NLSC2+MESC2-
Upper+Colorado+Mainstem?avg.2009.2008
April 7th
Currently snow falls between average and 2008.
Upper Colorado Mainstem
Web Reference: http://www.cbrfc.noaa.gov/snow/station/sweplot/png/trlu1+llku1+hfku1.07-17-avg.2009.2008.0.s.0.png
Bear River April 7th
Currently snow is average and just a little less than 2008.
Last 14 days…
Web Reference: http://water.weather.gov
Last 7 days…
Web Reference: http://water.weather.gov
Since April 1st CBRFC has received precipitation…but these amounts have only been above normal in a few areas. However, significant precipitation has fallen in a few headwater areas.
Forecast Precipitation
Web References: www.hpc.noaa.gov and www.cpc.noaa.gov
Web Reference: http://www.cbrfc.noaa.gov/climate/climoForecasts.cgi
•Basin Conditions •River Forecasts •Water Supply
Green River Basin -Water Supply Forecasts
Both the Upper Green and Yampa/White Basin Forecasts have essentially remained the same from March to April.
Both the Duchesne and Lower Green Basin Forecasts have dropped slightly from March to April.
•Basin Conditions •River Forecasts •Water Supply
Upper Colorado -Water Supply Forecasts
Both the Upper Colorado Mainstem and Gunnison Basin Forecasts have dropped slightly from March to April.
Web Reference: http://www.cbrfc.noaa.gov/wsup/pub2/graph/png/do.cond.2009.4
Water Year Precipitation, SWE, and Forecast have the same general pattern.
•Basin Conditions •River Forecasts •Water Supply
San Juan Basin -Water Supply Forecasts
Web Reference: http://www.cbrfc.noaa.gov/wsup/pub2/graph/png/sj.cond.2009.4
Forecasts dropped slightly from March to April.
•Basin Conditions •River Forecasts •Water Supply
Great Salt Lake -Water Supply Forecasts
Both the Bear and Lower Weber Basin Forecasts have increased slightly from March to April.
Both the Six Creeks and Utah Lake Basin Forecasts have increased slightly from March to April.
•Basin Conditions •River Forecasts •Water Supply
Sevier Basin -Water Supply Forecasts
Web Reference: http://www.cbrfc.noaa.gov/wsup/pub2/graph/png/sv.cond.2009.4
Forecasts dropped slightly from March to April.
•Basin Conditions •River Forecasts •Water Supply
Lower Colorado -Water Supply Forecasts
Web Reference: http://www.cbrfc.noaa.gov/wsup/pub2/graph/png/vg.cond.2009.4
Forecasts dropped slightly from March to April.
Web Reference: http://www.nwrfc.noaa.gov/westernwater/
Yampa River Basin has forecasts that fall in the range of 110 -130 % of average.
Web Reference: http://www.nwrfc.noaa.gov/westernwater/?page=evolution&id=WBRW4&per=4-7
245 kaf @ 92%
Web Reference: http://www.nwrfc.noaa.gov/westernwater/index.php?id=BMDC2&page=evolution&sendme=y
690 kaf @ 96 %
Web Reference: http://www.nwrfc.noaa.gov/westernwater/index.php?id=&mapcenter=&mapzoom=&mapcheck=n&cfore=for&cforetype=mean&fdate=2009-04-01
Click on a point. Then click view evolution plot.
Web Reference: http://www.nwrfc.noaa.gov/westernwater/index.php?page=evolution&id=GLDA3
Web Reference: http://www.nwrfc.noaa.gov/westernwater/index.php?page=evolution&id=GLDA3
Colorado at Lake Powell, Glen Cyn Dam, At, Arizona (GLDA3 - CBRFC)
Online Publication
Web Reference: www.cbrfc.noaa.gov/wsup/pub2/map/html/cbrfc.4.2009.html
•Basin Conditions •River Forecasts •Water Supply
Aspinall Unit OperationsandColorado Water Supply Meeting
USBR Grand Junction OfficeThursday, April 23rd , 20099:30 AM – 5:00 PM
Hosted by:United States Bureau of ReclamationNational Weather Service Forecast OfficeColorado Basin River Forecast Center
•Basin Conditions •River Forecasts •Water Supply
More Resources• www.cbrfc.noaa.gov• www.nwrfc.noaa.gov/westernwater
• Next April webinars:– Peak Flow Forecasts: 10am, April 9, 2009
• May webinars– Water Supply: 1pm, May 7, 2009– Peak Flow Forecasts: 10am, May 12,
2009
Bill Reed
Senior Hydrologist, CBRFCPhone: 801.524.5130
Email: [email protected]
Feedback, Questions, Concerns always welcome….
