Lake Powell Drought impact types: delineate dominant impacts agricultural (crops, pastures, grasslands) hydrological (rivers, groundwater, reservoirs) abnormally dry drought - moderate drought - severe drought - extreme drought - exceptional 28-Day Streamflow Average, as of December 8, 2009 Precipitation, Dec. 2008 - Nov. 2009 Drought Monitoring, as of December 1, 2009 Reservoir Storage as of December 1, 2009 Provided by USGS Water Watch, water.usgs.gov/waterwatch/ above average average below average Capacity of Reservoirs Reported (1,000 acre-feet) (figures do not include Lake Mead and Lake Powell) 3188 * 14,365 37,048 1,254 8,320 3,657 3,889 3,260 1,056 6,082 AZ 3/4 CO 76/74 ID 24/24 MT 42/45 NV 6/7 NM 13/13 OR 29/31 UT 25/28 WA 10/13 WY 3/13 Percent of Useable Contents 100 75 50 25 0 No. Reservoirs Reporting/No. Reservoirs CA 0/151 no report Drought impact types: delineate dominant impacts agricultural (crops, pastures, grasslands) hydrological (rivers, groundwater, reservoirs) abnormally dry drought - moderate drought - severe drought - extreme drought - exceptional A product of the Western Regional Climate Center and these agencies: http://drought.unl.edu/dm Southwest Weather Prepared by Anthony Artusa, NOAA/NWS/NCEP/CPC. Data from USDA, National Resources Conservation Service, National Water and Climate Center www.wcc.nrcs.usda.gov average over 1971-2000 Colorado River Reservoir Storage Data source: U.S. Bureau of Reclamation, www.usbr.gov/main/water MAF = million acre-feet; amsl = above mean sea level. Vertical red bars indicate elevation range for the year. Arizona was the only state entirely in drought on Dec. 1. Exceptional drought in South Texas near Corpus Christi was finally downgraded to extreme conditions after many months. Late November snow depths in the West were well below average except in the Cascades and southwest Montana where 150-200 percent of average was measured. The first month of the 2010 water year brought precipitation of 185 percent of average and runoff of 120 percent of average to California. It’s a start… Forecasts call for El Niño to continue strengthening and to last through at least the winter of 2009-10. low <10 much below normal 10-24 below normal 25-75 normal 76-90 above normal >90 much above normal high percentile classes (based on all measurements at the location) 3350 3450 3550 3650 3750 1965 1975 1985 1995 2005 dead storage elevation elevation (feet amsl) capacity: 24.3 MAF at 3,700 feet amsl December 1, 2009 storage: 15.0 MAF at 3,631 feet amsl (62% full) Two-month change: -4.3 ft. (-0.49 MAF) 850 950 1050 1150 1250 1935 1955 1975 1995 elevation (feet amsl) dead storage elevation capacity: 25.9 MAF at 1,220 feet amsl December 1, 2009 storage: 10.9 MAF at 1,093 feet amsl (42% full) Two-month change: -0.2 ft. (-0.02 MAF) Lake Mead Percent of Long−Term (1951−2001) Average 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120 125 130 135 140 145 150 < 50 > 150 Provided by NOAA’s National Climatic Data Center, www.ncdc.noaa.gov The Water Page JANUARY/FEBRUARY 2010 | Southwest Hydrology | 35
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Lake Powell
Drought impact types:delineate dominant impactsagricultural (crops, pastures, grasslands)hydrological (rivers, groundwater, reservoirs)
abnormally drydrought - moderatedrought - severedrought - extremedrought - exceptional
28-Day Streamfl ow Average, as of December 8, 2009
Precipitation, Dec. 2008 - Nov. 2009 Drought Monitoring, as of December 1, 2009
Reservoir Storage as of December 1, 2009
Provided by USGS Water Watch, water.usgs.gov/waterwatch/
above average average below average
Capacity of Reservoirs Reported (1,000 acre-feet)(figures do not include Lake Mead and Lake Powell)
3188 * 14,365 37,048 1,254 8,320 3,657 3,889 3,260 1,0566,082
AZ3/4
CO76/74
ID24/24
MT42/45
NV6/7
NM13/13
OR29/31
UT25/28
WA10/13
WY3/13
Per
cent
of U
seab
le C
onte
nts
100
75
50
25
0
No. Reservoirs Reporting/No. Reservoirs
CA0/151
no re
port
Drought impact types:delineate dominant impactsagricultural (crops, pastures, grasslands)hydrological (rivers, groundwater, reservoirs)
abnormally drydrought - moderatedrought - severedrought - extremedrought - exceptional
A product of the Western Regional Climate Center and these agencies:
http://drought.unl.edu/dm
Southwest Weather
Prepared by Anthony Artusa, NOAA/NWS/NCEP/CPC.
Data from USDA, National Resources Conservation Service, National Water and Climate Center
www.wcc.nrcs.usda.gov
average over 1971-2000
Colorado River Reservoir Storage
Data source: U.S. Bureau of Reclamation, www.usbr.gov/main/water
MAF = million acre-feet; amsl = above mean sea level. Vertical red bars indicate elevation range for the year.
Arizona was the only state entirely in drought on Dec. 1. Exceptional drought in South Texas near Corpus Christi was finally downgraded to extreme conditions after many months.
Late November snow depths in the West were well below average except in the Cascades and southwest Montana where 150-200 percent of average was measured.
The first month of the 2010 water year brought precipitation of 185 percent of average and runoff of 120 percent of average to California. It’s a start…
Forecasts call for El Niño to continue strengthening and to last through at least the winter of 2009-10.
low <10much below
normal
10-24below
normal
25-75normal
76-90above
normal
>90much above
normal
high
percentile classes (based on all measurements at the location)
3350
3450
3550
3650
3750
1965 1975 1985 1995 2005
dead storage elevation
elev
atio
n (fe
et a
msl
)
capacity: 24.3 MAF at 3,700 feet amsl
December 1, 2009 storage: 15.0 MAFat 3,631 feet amsl (62% full)
Two-month change: -4.3 ft. (-0.49 MAF)
850
950
1050
1150
1250
1935 1955 1975 1995
elev
atio
n (fe
et a
msl
)
dead storage elevation
capacity: 25.9 MAF at 1,220 feet amsl
December 1, 2009 storage: 10.9 MAF at 1,093 feet amsl (42% full)
Two-month change: -0.2 ft. (-0.02 MAF)
Lake Mead
Percent of Long−Term (1951−2001) Average
50 55 60 65 70 75 80 85 90 95 100 105 110 115 120 125 130 135 140 145 150< 50 > 150
Provided by NOAA’s National Climatic Data Center, www.ncdc.noaa.gov
The Water Page
JANUARY/FEBRUARY 2010 | Southwest Hydrology | 35
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