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Alert: Sacramento River Weirs Overtopping

Data Courtesy of CDEC; Forecast Data Courtesy of National Water Prediction Service (NWPS)


River Stage (Feet) Above / Below Weir Crest Level, Today & Last 10 Days (11/10/2024 - 11/19/2024)
with Daily Average of NWPS Forecasts issued 2024-11-20
Weir NWPS Forecast
11/24
NWPS Forecast
11/23
NWPS Forecast
11/22
NWPS Forecast
11/21
Today PeakToday Hour 11/19 11/18 11/17 11/16 11/15 11/14 11/13 11/12 11/11 11/10
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 3.91 3.96 < -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 2.95 2.35 < -0.50 < -0.50     < -0.50 < -0.50 < -0.50 < -0.50 < -0.50 < -0.50 < -0.50 < -0.50 < -0.50 < -0.50
FRE -4.85 -5.58 -15.07 -18.48 -18.60 1900 -19.56 -19.40
-19.28
-19.31 -19.41 -19.46 -19.51 -19.53 -19.58 -19.64

Water Year 2025 Daily Average River Stage

WY 2025 Sacramento River Weirs Moulton, Colusa, Tisdale, and Fremont, Days Crested: MLW 0, CLW 0, TIS 0, FRE 0, with Daily Average of NWPS Forecasts issued 2024-11-20
Weir Metadata and River Forecasts
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
11/10/2024 - 11/19/2024
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: Below Minimum
Crest: 0 Days
Flood: 0 Days
Danger: 0 Days
Peak: 12.72 on 2024-11-17
Crest: 0 Days
Flood: 0 Days
Danger: 0 Days
Site History
Last Date
Over Crest: 2024-02-23
Over Flood:
Over Danger:
Over Crest: 2024-03-09
Over Flood: 1999-04-22
Over Danger:
Over Crest: 2024-03-16
Over Flood: 2000-04-15
Over Danger: 1999-05-24
Over Crest: 2024-03-09
Over Flood: 1997-01-04
Over Danger: 1984-08-21
National Water Prediction Service River Forecast at Moulton River Forecast at Colusa River Forecast at Tisdale River Forecast at Fremont
California Nevada River Forecast Center River Forecast River Forecast at Moulton River Forecast at Colusa River Forecast at Tisdale River Forecast at Fremont
Water Year 2025 Daily Data Sacramento River Weirs Moulton, Colusa, Tisdale, and Fremont
WY2025Moulton 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
Daily AvgFt above CrestFt above/
below
Flood
Daily AvgFt above CrestFt above/
below
Flood
Daily AvgFt above CrestFt above/
below
Flood
Daily AvgFt above CrestFt above/
below
Flood
NWPS Forecast 2024-11-24 76.10     64.81 3.91 -5.29 47.05 2.95 -4.55 27.15    
NWPS Forecast 2024-11-23 76.10     64.86 3.96 -5.24 46.45 2.35 -5.15 26.42    
NWPS Forecast 2024-11-22 76.10     60.89     44.05     16.93    
NWPS Forecast 2024-11-21 76.10     60.80     44.00     13.52    
2024-11-19                   12.44    
2024-11-18                   12.60    
2024-11-17                   12.72    
2024-11-16                   12.69    
2024-11-15                   12.59    
2024-11-14                   12.54    
2024-11-13                   12.49    
2024-11-12                   12.47    
2024-11-11                   12.42    
2024-11-10                   12.36    
2024-11-09                   12.47    
2024-11-08                   12.57    
2024-11-07                   12.62    
2024-11-06                   12.68    
2024-11-05                   12.78    
2024-11-04                   12.87    
2024-11-03                   12.71    
2024-11-02                   12.64    
2024-11-01                   12.53    
2024-10-31                   12.44    
2024-10-30                   12.44    
2024-10-29                   12.50    
2024-10-28                   12.48    
2024-10-27                   12.48    
2024-10-26                   12.56    
2024-10-25                   12.73    
2024-10-24                   12.99    
2024-10-23                   13.05    
2024-10-22                   13.13    
2024-10-21                   13.17    
2024-10-20                   13.12    
2024-10-19                   13.23    
2024-10-18                   13.32    
2024-10-17                   13.40    
2024-10-16                   13.54    
2024-10-15                   13.66    
2024-10-14                   13.76    
2024-10-13                   13.91    
2024-10-12                   14.23    
2024-10-11                   14.55    
2024-10-10                   14.69    
2024-10-09                   14.80    
2024-10-08                   14.89    
2024-10-07                   14.96    
2024-10-06                   15.02    
2024-10-05                   15.17    
2024-10-04                   15.61    
2024-10-03                   16.24    
2024-10-02                   16.90    
2024-10-01                   17.17    

Overtopping History at Weirs

Data Notes

  1. 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.
  2. Data is River Stage reported in Feet. Daily value is 24 hour average.
  3. Data Source: California Data Exchange Center
  4. 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.
  5. 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.

Subscribe to Alerts

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 NWPS 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.