Lake Powell, Houseboating, Glen Canyon, Striped Bass

Lake Powell





Lake Powell

For May 18th, 2021
Snowpack is 52% of avg
TotalPrecip is 72.00% of avg

Lake Powell is currently 428.48 feet deep at the dam
Water Summary
Today is day 230 of 365 for the Water Year 2021. We are 63% through the Water Year.
Last Reading: 3560.48 on May 17, 2021
Powell was last within 2" of this elevation on May 16, 2021
There are currently 2,723,981,740,543 gallons of water in Lake Powell!
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Printable Version
Gas Prices on Lake
Detailed Map of Powell
15 Day Weather Forecast
SW Satellite Weather
SW Water Vapor


Elevation & Content Water Inflow Data Glen Canyon Dam Release Data
Lake Powell is 139.52 feet below Full Pool (Elevation 3,700)

By content, Lake Powell is 34.37% of Full Pool (24,322,000 af)
Total inflows for water year 2021: 2,018,864 acre feet

This is 41% of the May 17th average of 4,924,179 acre feet
Total releases for water year 2021: 5,151,776 acre feet

This is 68.69% of the minimum required of 7,500,000 acre feet
During WY 2021, water storage has fallen by 2,996,955 AF and total outflows have exceeded total inflows by 3,132,912 AF
The 28 tracked reservoirs above Lake Powell are currently at 70.96% of capacity. Click for Details
Inflows for WY 2021 are 53.96% of WY 2020         Rivers feeding Lake Powell are running at 17.54% of the May 18th avg. Click for Details

Lake Powell is down -41.29 feet from one year ago.    Lake Powell is at low for water year and down 35.35 feet from the high.

View Acre Feet     Last 14 Measurements
Lake Powell is down -1.31 feet over these measurements

DATE MEASURED ELEVATION CHANGE CONTENT INFLOW (cfs) OUTFLOW (cfs) HIGH TEMP LOW TEMP WATER TEMP
Mon, May 17, 2021
3560.48
-0.12
8359582
6552
11216
80.0
60.0
65.0
Sun, May 16, 2021
3560.60
-0.11
8368731
4118
8369
83.0
61.0
64.0
Sat, May 15, 2021
3560.71
-0.07
8377124
5856
8447
89.0
64.0
64.0
Fri, May 14, 2021
3560.78
-0.10
8382468
7662
11502
92.0
65.0
63.0
Thu, May 13, 2021
3560.88
-0.10
8390106
7328
11170
90.0
58.0
63.0
Wed, May 12, 2021
3560.98
-0.07
8397749
8425
11020
83.0
53.0
62.0
Tue, May 11, 2021
3561.05
-0.08
8403102
8509
11522
78.0
52.0
62.0
Mon, May 10, 2021
3561.13
-0.14
8409223
5547
11063
80.0
55.0
62.0
Sun, May 09, 2021
3561.27
-0.10
8419941
4777
8628
79.0
53.0
61.0
Sat, May 08, 2021
3561.37
-0.06
8427603
7358
9542
83.0
63.0
61.0
Fri, May 07, 2021
3561.43
-0.09
8432203
8239
11677
89.0
62.0
61.0
Thu, May 06, 2021
3561.52
-0.15
8439106
5425
11373
91.0
59.0
61.0
Wed, May 05, 2021
3561.67
-0.12
8450619
7112
11809
87.0
59.0
60.0
Tue, May 04, 2021
3561.79
-0.16
8459837
5343
11720
82.0
54.0
60.0
Averages of List
3561.12
-0.11
8408385
6589
10647
84.7
58.4
62.1

Averages for May 18th

AVERAGE TYPE ELEVATION CHANGE CONTENT INFLOW (cfs) OUTFLOW (cfs) HIGH TEMP LOW TEMP WATER TEMP
Since Filled
3637.87
0.29
16197615
30038
14629
82.3
56.3
64.0
All-Time
3623.12
0.30
15003487
29582
14043
83.3
56.3
64.0

Last 10 May 18th's data records

DATE MEASURED ELEVATION CHG vs TODAY CONTENT INFLOW (cfs) OUTFLOW (cfs) HIGH TEMP LOW TEMP WATER TEMP
Mon, May 18, 2020
3601.95
41.47
11937082
20309
10420
89.0
64.0
65.0
Sat, May 18, 2019
3578.77
18.29
9834531
29734
10853
73.0
44.0
63.0
Fri, May 18, 2018
3609.98
49.50
12728287
21007
12318
82.0
55.0
65.0
Thu, May 18, 2017
3611.56
51.08
12887968
45780
11099
61.0
39.0
60.0
Wed, May 18, 2016
3596.12
35.64
11383632
37171
11830
71.1
52.0
64.0
Mon, May 18, 2015
3592.41
31.93
11040086
23734
11844
70.0
52.0
63.0
Sun, May 18, 2014
3582.77
22.29
10178697
20350
7182
91.0
68.0
61.0
Sat, May 18, 2013
3596.46
35.98
11415450
21590
9440
75.0
60.1
66.0
Fri, May 18, 2012
3635.92
75.44
15526451
9618
10309
84.0
63.0
67.0
Wed, May 18, 2011
3616.55
56.07
13400917
39333
22361
61.0
52.0
60.0
Averages of List
3602.25
0.28
12033310
26863
11766
75.7
54.9
63.4


Accessibility of Primitive Launches and Other Sites
As of Monday, May 17th, 2021 where elevation was 3560.48'

SITE/LAUNCH NAME MINIMUM SAFE
ELEVATION
ABSOLUTE MINIMUM
USABLE ELEVATION
CURRENT LEVEL VS.
ABSOLUTE MINIMUM
CURRENT ACCESSIBILITY
Halls Crossing Launch
3550.00
3548.00
12.48 Above
Open and Usable
Wahweap
3558.00
3556.00
4.48 Above
Open and Usable
Bullfrog (Main Launch)
3578.00
3576.00
15.52 Below
Unusable, go to main marinas
Castle Rock Cut-Off
3583.00
3580.00
19.52 Below
Unusable, use Main Channel
Antelope Point
3588.00
3587.00
26.52 Below
Unusable, go to main marinas
Dominguez Butte Cut-Off
3602.00
3600.00
39.52 Below
Unusable, go to main marinas
Gunsight to Padre Bay Cut-Off
3613.00
3609.00
48.52 Below
Unusable, go to main marinas
Hite Marina
3650.00
3645.00
84.52 Below
Unusable, go to main marinas
Farley Canyon
3653.00
3649.00
88.52 Below
Unusable, go to main marinas
Copper Canyon
3663.00
3660.00
99.52 Below
Unusable, go to main marinas
Bullfrog to Halls Creek Cut-Off
3670.00
3668.00
107.52 Below
Unusable, use Main Channel
Piute Farms
3682.00
3680.00
119.52 Below
Unusable, go to main marinas
Blue Notch is unknown and really just shoreline launching at whatever point feels good. No minimum given except amount of courage it takes to reach this launch.


Search DB For More Water Data Facts



Measurements are taken at 11:59 pm of the date listed
Temperature data is from Wahweap, AZ
Water temperature data is from wayneswords.com*
CHANGE represents water elevation change from previous day

Units used in each measurement:
Elevation - Feet above sea level
Change - Feet difference over previous measurement
Content - Acre Feet
Inflow - Average Cubic Feet / Second over entire 24 hour period
Outflow - Average Cubic Feet / Second over entire 24 hour period
All Temps - Degrees Farhenheit
The Water Year runs from October 1 to September 30 of the next year
Acre Feet = 1.9835 * Flow CFS
TP = Total Precipitation



Page took 1.296 seconds to create!
Copyright Summit Technologies, Inc.
Water data courtesy of US Bureau of Reclamation
The water year runs from Oct 1 - Sept 30
Since Filled is from 06/22/1980 forward
*Water temp data is provided by Wayne Gustaveson
  as measured in the a.m. at the Wahweap docks
*Air temp data is sourced from (Prev 24 Hr Extremes):
   Page, AZ Weather
All data is provisional and subject to review and modification
Call 1-800-752-8525 for up-to-date water level infomation
or go to Lake Powell Source Data
USBR Projected Outlook
Current Snowpack Conditions for Upper Colorado Basin


Copyright Summit Technologies, Inc.
1999 - 2021



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Lake Powell, Houseboating, Glen Canyon, Striped Bass