Overview Realtime Historical Map View
Extreme Heat Watch
2026-07-27T20:00:00-07:00

* WHAT...Dangerously hot conditions possible. Afternoon temperatures in the desert valleys will climb into the 108 to 114 degree range, and may exceed 115 along the Colorado River Valley, and 120 Death Valley. * WHERE...Portions of northwest Arizona, southeast California, and southern Nevada including the Greater Mojave Desert region. * WHEN...From Thursday morning through Monday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events.

Colorado River Below Parker Dam, Az-Ca Historical Data

Historical Data


Streamflow Range


Date Average 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011
01-01 2431.11
01-02 2488.89
01-03 2987.78
01-04 2775.71
01-05 2546.67
01-06 2792.22
01-07 2377.78
01-08 2901.11
01-09 3383.33
01-10 3280.0
01-11 3828.89
01-12 3041.11
01-13 3587.78
01-14 3345.56
01-15 3872.22
01-16 4373.33
01-17 3944.0
01-18 4024.0
01-19 4827.0
01-20 5573.0
01-21 5094.44
01-22 4930.0
01-23 5005.56
01-24 4369.0
01-25 3767.0
01-26 4903.33
01-27 3816.67
01-28 5300.0
01-29 4102.0
01-30 4511.0
01-31 3776.0
02-01 3856.0
02-02 4412.0
02-03 4400.0
02-04 4506.0
02-05 4740.0
02-06 4200.0
02-07 5107.0
02-08 4285.0
02-09 5118.0
02-10 4621.0
02-11 5815.0
02-12 6420.0
02-13 5418.0
02-14 5507.0
02-15 6069.0
02-16 6047.0
02-17 6186.67
02-18 6365.56
02-19 5717.78
02-20 6335.0
02-21 5155.0
02-22 5628.0
02-23 5974.0
02-24 5822.0
02-25 6682.5
02-26 6737.78
02-27 5700.0
02-28 6679.0
02-29 7660.0
03-01 6583.0
03-02 6058.0
03-03 7227.0
03-04 8101.0
03-05 7553.0
03-06 7227.0
03-07 6500.0
03-08 5655.0
03-09 8357.0
03-10 6635.0
03-11 7767.0
03-12 7664.0
03-13 7663.0
03-14 9469.0
03-15 7196.0
03-16 7697.0
03-17 7273.0
03-18 6151.0
03-19 7717.27
03-20 6503.0
03-21 8136.36
03-22 7874.0
03-23 8153.64
03-24 8629.09
03-25 9343.64
03-26 9929.09
03-27 8177.27
03-28 8486.36
03-29 7559.09
03-30 7832.73
03-31 8100.0
04-01 6584.55
04-02 9672.73
04-03 8563.64
04-04 8997.27
04-05 8769.09
04-06 8200.0
04-07 8238.18
04-08 8600.0
04-09 8156.0
04-10 7986.36
04-11 7498.18
04-12 7034.55
04-13 6848.18
04-14 7099.09
04-15 6834.0
04-16 8288.0
04-17 8387.0
04-18 7307.0
04-19 7684.0
04-20 7543.33
04-21 8658.18
04-22 7986.36
04-23 8864.55
04-24 9685.45
04-25 8402.0
04-26 8698.18
04-27 7245.45
04-28 7072.0
04-29 7978.18
04-30 7445.0
05-01 7421.67
05-02 7155.45
05-03 8172.73
05-04 6655.83
05-05 6504.17
05-06 6817.5
05-07 6740.0
05-08 7139.09
05-09 7002.5
05-10 8069.09
05-11 7378.33
05-12 6422.5
05-13 6508.33
05-14 7267.27
05-15 6886.36
05-16 7610.0
05-17 6438.33
05-18 6367.5
05-19 6230.83
05-20 7215.83
05-21 7577.5
05-22 6696.67
05-23 7710.83
05-24 7686.67
05-25 7732.5
05-26 8062.5
05-27 8191.67
05-28 8515.0
05-29 8001.67
05-30 7475.0
05-31 8040.0
06-01 7874.17
06-02 7879.09
06-03 8327.5
06-04 7542.5
06-05 7511.82
06-06 7939.09
06-07 7436.36
06-08 6553.33
06-09 7061.67
06-10 6192.5
06-11 7807.5
06-12 6020.91
06-13 6520.0
06-14 7348.18
06-15 7467.5
06-16 7428.33
06-17 7044.17
06-18 6773.33
06-19 7616.36
06-20 6233.64
06-21 6443.64
06-22 6022.73
06-23 7003.64
06-24 7224.55
06-25 7126.36
06-26 8710.91
06-27 7316.36
06-28 7729.09
06-29 6943.64
06-30 7181.82
07-01 6855.45
07-02 7340.91
07-03 9810.91
07-04 8270.0
07-05 9893.33
07-06 7415.0
07-07 7017.27
07-08 7683.64
07-09 6512.73
07-10 8759.17
07-11 7609.17
07-12 6930.0
07-13 5790.0
07-14 5556.67
07-15 4905.83
07-16 5562.73
07-17 7661.67
07-18 7189.09
07-19 6630.0
07-20 6539.17
07-21 6455.0
07-22 6262.73
07-23 5674.17
07-24 5477.5
07-25 5525.83
07-26 5749.17
07-27 6155.83
07-28 6460.83
07-29 6084.17
07-30 5159.17
07-31 5893.33
08-01 5617.0
08-02 5520.91
08-03 5752.5
08-04 5076.67
08-05 4483.33
08-06 5779.17
08-07 6151.67
08-08 8150.0
08-09 6563.64
08-10 5391.82
08-11 4899.17
08-12 5494.17
08-13 4514.55
08-14 5770.83
08-15 6015.83
08-16 7340.91
08-17 5720.0
08-18 5040.0
08-19 6705.45
08-20 6010.0
08-21 5065.45
08-22 5764.55
08-23 5421.67
08-24 4912.73
08-25 5953.64
08-26 4925.83
08-27 4520.0
08-28 4570.0
08-29 5305.0
08-30 5796.67
08-31 5543.64
09-01 6576.67
09-02 7446.67
09-03 7116.67
09-04 6785.0
09-05 5678.33
09-06 5725.83
09-07 4837.5
09-08 4876.67
09-09 4616.67
09-10 4796.67
09-11 4805.0
09-12 4790.0
09-13 5008.18
09-14 6256.67
09-15 5074.17
09-16 5864.55
09-17 5793.33
09-18 5575.0
09-19 6246.67
09-20 5700.0
09-21 5560.0
09-22 5982.5
09-23 5568.33
09-24 5801.67
09-25 5938.33
09-26 6247.5
09-27 6522.5
09-28 4974.17
09-29 4561.67
09-30 4796.67
10-01 4916.0
10-02 5333.64
10-03 5805.45
10-04 5113.64
10-05 5415.83
10-06 4919.17
10-07 4495.0
10-08 4756.67
10-09 4673.33
10-10 5294.17
10-11 4720.0
10-12 4373.33
10-13 4497.5
10-14 4403.33
10-15 3992.73
10-16 4236.36
10-17 4796.67
10-18 4750.0
10-19 4181.67
10-20 4233.64
10-21 4172.73
10-22 4877.5
10-23 4319.17
10-24 4350.0
10-25 4275.83
10-26 4200.91
10-27 3750.83
10-28 4362.0
10-29 4089.09
10-30 4535.45
10-31 4470.91
11-01 4297.78
11-02 4644.0
11-03 5031.0
11-04 4555.45
11-05 4064.55
11-06 4511.0
11-07 4006.0
11-08 4298.0
11-09 3949.0
11-10 4208.0
11-11 3783.0
11-12 4134.0
11-13 4156.0
11-14 4127.27
11-15 3883.0
11-16 3677.27
11-17 3741.82
11-18 3714.0
11-19 4108.0
11-20 3704.0
11-21 3840.0
11-22 3590.0
11-23 3603.0
11-24 3414.0
11-25 3260.0
11-26 3195.45
11-27 3496.0
11-28 3525.0
11-29 3392.73
11-30 4097.27
12-01 4121.82
12-02 3619.09
12-03 3306.36
12-04 3830.91
12-05 3378.18
12-06 3195.1
12-07 4066.36
12-08 3490.0
12-09 3584.0
12-10 3576.36
12-11 2945.45
12-12 3030.0
12-13 3222.73
12-14 3297.0
12-15 3345.0
12-16 3353.33
12-17 2961.11
12-18 2790.0
12-19 2691.0
12-20 2386.67
12-21 2326.67
12-22 2827.0
12-23 2563.0
12-24 3327.0
12-25 2972.0
12-26 2818.89
12-27 3778.89
12-28 3918.89
12-29 3735.0
12-30 2342.5
12-31 2884.44

Annual Peak Streamflow


Seasonal Comparison


Oceanic Nino Index