Alert: Sacramento River Weirs Overtopping: SacPAS Central Valley Prediction & Assessment of Salmon

Alert: Sacramento River Weirs Overtopping

Data Courtesy of CDEC; Forecast Data Courtesy of NWS Forecast Office Sacramento

Weir Analysis: Last 10 Days || View Other Years || WY 2023 Graph & Data Table || Overtop History Graphs || Data Notes || Subscribe ||

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Below Crest	Crest	Flood	Danger	Peak Value in Period	Within 1 ft of Flood	Peak Value & Within 1 ft of Flood

River Stage (Feet) Above / Below Weir Crest Level, Today & Last 10 Days (01/20/2023 - 01/29/2023)
with Daily Average of NWS Forecasts issued 01-30-2023

Weir	NWS Forecast 02/03	NWS Forecast 02/02	NWS Forecast 02/01	NWS Forecast 01/31	Today Peak	Today Hour	01/29	01/28	01/27	01/26	01/25	01/24	01/23	01/22	01/21	01/20
MLW	< -0.50	< -0.50	< -0.50	< -0.50			< -0.50	< -0.50	< -0.50	< -0.50	< -0.50	< -0.50	< -0.50	< -0.50	< -0.50	< -0.50
CLW	< -0.50	< -0.50	< -0.50	< -0.50			< -0.50	< -0.50	< -0.50	< -0.50	< -0.50	< -0.50	< -0.50	< -0.50	< -0.50	< -0.50
TIS	< -0.50	< -0.50	< -0.50	< -0.50			< -0.50	< -0.50	< -0.50	< -0.50	< -0.50	< -0.50	< -0.50	< -0.50	1.20	1.82
FRE	-14.15	-13.82	-13.42	-12.94	-12.11	0000	-11.66	-10.65	-9.67	-8.79	-7.81	-6.32	-3.74	-1.22	0.45	1.21

Weir	Moulton Weir (MLW)	Colusa Weir (CLW)	Tisdale Weir (TIS)	Fremont Weir (FRE)
River Stage Levels	Minimum: 75.7 Crest: 76.2 Flood: 83.8 Danger: 84.8 Datum: NAVD88	Minimum: 60.4 Crest: 60.9 Flood: 70.1 Danger: 71.1 Datum: NAVD88	Minimum: 43.6 Crest: 44.1 Flood: 51.6 Danger: 52.6 Datum: NAVD88	Minimum: NA Crest: 32.0 Flood: 39.5 Danger: 40.5 Datum: NAVD88
Summary for 01/20/2023 - 01/29/2023	Peak: Below Minimum Crest: 0 Days Flood: 0 Days Danger: 0 Days	Peak: Below Minimum Crest: 0 Days Flood: 0 Days Danger: 0 Days	Peak: 45.92 on 2023-01-20 Crest: 2 Days Flood: 0 Days Danger: 0 Days	Peak: 33.21 on 2023-01-20 Crest: 2 Days Flood: 0 Days Danger: 0 Days
Site History Last Date	Over Crest: 2023-01-17 Over Flood: Over Danger:	Over Crest: 2023-01-19 Over Flood: 1999-04-22 Over Danger:	Over Crest: 2023-01-21 Over Flood: 2000-04-15 Over Danger: 1999-05-24	Over Crest: 2023-01-21 Over Flood: 1997-01-04 Over Danger: 1984-08-21
National Weather Service, Advanced Hydrologic Prediction Service	NWS Multi-Day Forecast	NWS Multi-Day Forecast	NWS Multi-Day Forecast	NWS Multi-Day Forecast

Water Year 2023 Daily Average River Stage

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WY 2023	Moulton Weir MLW Minimum: 75.7 Crest: 76.2 Datum: NAVD88			Colusa Weir CLW Minimum: 60.4 Crest: 60.9 Datum: NAVD88			Tisdale Weir TIS Minimum: 43.6 Crest: 44.1 Datum: NAVD88			Fremont Weir FRE Minimum: NA Crest: 32.0 Datum: NAVD88
WY 2023	Daily Avg	Ft above Crest	Ft above/ below Flood	Daily Avg	Ft above Crest	Ft above/ below Flood	Daily Avg	Ft above Crest	Ft above/ below Flood	Daily Avg	Ft above Crest	Ft above/ below Flood
NWS Forecast 2023-02-03	76.10			60.80			44.00			17.85
NWS Forecast 2023-02-02	76.10			60.80			44.00			18.18
NWS Forecast 2023-02-01	76.10			60.80			44.00			18.58
NWS Forecast 2023-01-31	76.10			60.80			44.00			19.06
2023-01-29										20.34
2023-01-28										21.35
2023-01-27										22.33
2023-01-26										23.21
2023-01-25										24.19
2023-01-24										25.68
2023-01-23										28.26
2023-01-22										30.78
2023-01-21							45.30	1.20	-6.30	32.45	0.45	-7.05
2023-01-20							45.92	1.82	-5.68	33.21	1.21	-6.29
2023-01-19				61.62	0.72	-8.48	46.46	2.36	-5.14	33.70	1.70	-5.80
2023-01-18				63.21	2.31	-6.89	47.17	3.07	-4.43	34.19	2.19	-5.31
2023-01-17	76.79	0.59	-7.01	65.58	4.68	-4.52	47.73	3.63	-3.87	34.53	2.53	-4.97
2023-01-16	77.86	1.66	-5.94	66.52	5.62	-3.58	47.88	3.78	-3.72	34.66	2.66	-4.84
2023-01-15	77.35	1.15	-6.45	66.17	5.27	-3.93	47.82	3.72	-3.78	34.63	2.63	-4.87
2023-01-14	76.65	0.45	-7.15	65.89	4.99	-4.21	47.76	3.65	-3.85	34.20	2.20	-5.30
2023-01-13	76.73	0.53	-7.07	65.89	4.99	-4.21	47.70	3.60	-3.90	34.10	2.10	-5.40
2023-01-12	76.48	0.28	-7.32	65.68	4.78	-4.42	47.65	3.55	-3.95	34.16	2.15	-5.35
2023-01-11	76.90	0.70	-6.90	66.06	5.16	-4.04	47.55	3.45	-4.05	34.01	2.01	-5.49
2023-01-10	76.65	0.45	-7.15	65.68	4.78	-4.42	47.31	3.21	-4.29	33.65	1.65	-5.85
2023-01-09				64.41	3.51	-5.69	46.85	2.75	-4.75	33.06	1.06	-6.44
2023-01-08				61.90	0.99	-8.21	46.01	1.91	-5.59	32.63	0.63	-6.87
2023-01-07				62.50	1.60	-7.60	46.52	2.42	-5.08	32.10	0.10	-7.40
2023-01-06				62.92	2.02	-7.18	46.12	2.02	-5.48	30.11
2023-01-05										27.59
2023-01-04										29.01
2023-01-03										30.79
2023-01-02							45.70	1.60	-5.90	31.08
2023-01-01				62.65	1.75	-7.45	46.22	2.12	-5.38	29.42
2022-12-31				61.62	0.72	-8.48	45.22	1.12	-6.38	22.18
2022-12-30										19.19
2022-12-29										17.64
2022-12-28										13.32
2022-12-27										12.05
2022-12-26										11.63
2022-12-25										11.60
2022-12-24										11.61
2022-12-23										11.60
2022-12-22										11.44
2022-12-21										11.39
2022-12-20										11.66
2022-12-19										11.87
2022-12-18										12.05
2022-12-17										12.47
2022-12-16										13.37
2022-12-15										14.72
2022-12-14										16.60
2022-12-13										18.54
2022-12-12										17.38
2022-12-11										13.79
2022-12-10										13.12
2022-12-09										13.87
2022-12-08										14.66
2022-12-07										13.98
2022-12-06										13.25
2022-12-05										12.85
2022-12-04										12.06
2022-12-03										11.49
2022-12-02										11.22
2022-12-01										11.11
2022-11-30										11.10
2022-11-29										11.10
2022-11-28										11.10
2022-11-27										11.10
2022-11-26										11.10
2022-11-25										11.10
2022-11-24										11.10
2022-11-23										11.10
2022-11-22										11.10
2022-11-21										11.10
2022-11-20										11.15
2022-11-19										11.28
2022-11-18										11.37
2022-11-17										11.43
2022-11-16										11.51
2022-11-15										11.58
2022-11-14										11.63
2022-11-13										11.84
2022-11-12										12.19
2022-11-11										12.42
2022-11-10										12.39
2022-11-09										12.28
2022-11-08										11.99
2022-11-07										11.77
2022-11-06										11.66
2022-11-05										11.61
2022-11-04										11.60
2022-11-03										11.51
2022-11-02										11.44
2022-11-01										11.53
2022-10-31										11.48
2022-10-30										11.44
2022-10-29										11.43
2022-10-28										11.44
2022-10-27										11.38
2022-10-26										11.35
2022-10-25										11.33
2022-10-24										11.34
2022-10-23										11.36
2022-10-22										11.39
2022-10-21										11.36
2022-10-20										11.36
2022-10-19										11.35
2022-10-18										11.32
2022-10-17										11.36
2022-10-16										11.41
2022-10-15										11.41
2022-10-14										11.46
2022-10-13										11.48
2022-10-12										11.44
2022-10-11										11.46
2022-10-10										11.47
2022-10-09										11.45
2022-10-08										11.48
2022-10-07										11.49
2022-10-06										11.49
2022-10-05										11.55
2022-10-04										11.57
2022-10-03										11.56
2022-10-02										11.59
2022-10-01										11.59
WY 2023 Total Days: 121	Daily Avg	Ft above Crest	Ft above/ below Flood	Daily Avg	Ft above Crest	Ft above/ below Flood	Daily Avg	Ft above Crest	Ft above/ below Flood	Daily Avg	Ft above Crest	Ft above/ below Flood
WY 2023 Total Days: 121	MLW Crest Days: 8 (6.61 %) Flood Days: 0 Danger Days: 0			CLW Crest Days: 16 (13.22 %) Flood Days: 0 Danger Days: 0			TIS Crest Days: 19 (15.70 %) Flood Days: 0 Danger Days: 0			FRE Crest Days: 15 (12.40 %) Flood Days: 0 Danger Days: 0

Overtop History at Weirs

Data Notes

At Tisdale, Moulton, and Colusa weirs, there is a minimum stage height to collect data. In the absence of data, the value is assumed below the stated minimum for the weir.
Data is River Stage reported in Feet. Daily value is 24 hour average.
Data Source: California Data Exchange Center
Fremont Weir: On October 3, 2016, the California Department of Water Resources (DWR) changed the reporting of river stage data collected at 5 locations in the lower Sacramento River area from their previous datum, either National Geodetic Vertical Datum 1929 (NGVD29) or United Stated Engineering Datum (USED) to the North American Vertical Datum 1988 (NAVD88) standard.
Moulton, Colusa, Tisdale weirs: On October 1, 2019, the California Department of Water Resources (DWR) changed the reporting of river stage data collected at 21 locations in the upper Sacramento River and Feather River area from their previous datum, either National Geodetic Vertical Datum 1929 (NGVD29), United States Engineering Datum (USED), or Local Datum to the North American Vertical Datum 1988 (NAVD88) standard.

To subscribe to the SacPAS Weir Alert email, please email web@cbr.washington.edu with the subject "SacPAS Weir Alert Subscription". At this time, subscribing and unsubscribing to the alert is a manual process.

Emails are generated once daily at 9:15 am on days where the daily average river stage value for "yesterday" is greater than the crest level at least 1 of the 4 weirs being monitored or the NWS Forecast is greater than the crest level.

Sample email content for 22 December 2021:

ALERT

NWS Forecast: Tisdale (TIS) on 12/25 to crest minimum 44.1: + 0.44 ft.

WY 2022 (82 Days) Summary
Moulton (MLW) Crest Days: 0 (0.00 %) Flood Days: 0 Danger Days: 0
Colusa (CLW) Crest Days: 0 (0.00 %) Flood Days: 0 Danger Days: 0
Tisdale (TIS) Crest Days: 3 (3.66 %) Flood Days: 0 Danger Days: 0
Fremont (FRE) Crest Days: 0 (0.00 %) Flood Days: 0 Danger Days: 0

To see full analysis, please refer to "Alert: Sacramento River Weirs Overtopping" on SacPAS website. 
URL: www.cbr.washington.edu/sacramento//data/alert_weirs.html


Thank you,
SacPAS Web Team
===============
This is automatic email generated by analysis at 22 Dec 2021 09:15:02 PST
Replies to this email go unanswered.

Citation: Columbia Basin Research, University of Washington. (2023). SacPAS Sacramento River Weir Overtopping. Available from www.cbr.washington.edu/sacramento/data/alert_weirs.html

Generated: 30 Jan 2023 15:25:19 PST. www.cbr.washington.edu/sacramento/data/.

SacPAS: Central Valley Prediction & Assessment of Salmon, University of Washington, Columbia Basin Research, www.cbr.washington.edu/sacramento/

SacPAS: Central Valley Prediction & Assessment of Salmon