NW-C-4641-26
Low water levels between Montréal and Trois-Rivières (St. Lawrence River)
ActiveReceived 03 Nov 2026, 00:00 UTC
Warning text
Positions open on the mapNW-C-4641-26
Date
2026-11-03 16:00 UTC
Status
Published
Title
Low Water Level
Cancels
NW-C-4423-26
Areas
Montréal to Trois-Rivières
Port of Montreal
Port of Sorel-Tracy
St. Lawrence
Categories
Low Water Level
Description
The water level is either below chart datum or will fluctuate back and forth between the upstream boundary of the Port of Montreal and Lac Saint-Pierre.
Position
Centroid : 45° 48.937'N 073° 18.043'W
Pt 1: 46° 09.035'N 073° 03.220'W
Pt 2: 46° 16.891'N 072° 48.170'W
Pt 3: 46° 18.981'N 072° 34.255'W
Pt 4: 46° 15.218'N 072° 36.070'W
Pt 5: 46° 09.029'N 072° 44.353'W
Pt 6: 46° 02.114'N 073° 03.729'W
Pt 7: 45° 23.705'N 073° 31.407'W
Pt 8: 45° 27.792'N 073° 53.334'W
Charts
1310(NAD83),
1310(NAD83),
1311(NAD83),
1312(NAD83)
Location map
Open on the full mapAnalysis
ActiveWater level is at or below chart datum and may fluctuate between the upstream boundary of the Port of Montreal and Lac Saint-Pierre. Area affected includes Montréal to Trois-Rivières, Port of Montreal and Port of Sorel-Tracy. Mariners should expect reduced under-keel clearance and variable depths. This notice cancels NW-C-4423-26.
Navigate with caution, allow extra under-keel clearance, consult local port authorities and latest water level information before transiting.
- Type
- Navigational hazard · severity moderate
- Feed
- Wrecks, obstructions and drifting objectsAll warnings of this kind on the map, or as an API feed.
- Location
- Montréal to Trois-Rivières; Port of Montreal; Port of Sorel-Tracy; St. Lawrence
- Validity
- From 03 Nov 2026, 16:00 UTC
2026-11-03 16:00 UTC - Hazards
- low water level, reduced under-keel clearance
- Cancels
- NW-C-4423-26
- Charts
- 1310(NAD83), 1310(NAD83), 1311(NAD83), 1312(NAD83)
Coast stations for this area
- RCCJRCC QuebecCanada105 NM from the area
- RCCJRCC TrentonCanada207 NM from the area
- RCCRCC BostonUnited States230 NM from the area
- DSCDSC Station Mont-St. BrunoJRCC QuebecCanadaMMSI 003160028VHF 40range 40 NM16 NM from the area
- DSCDSC Station SorelJRCC QuebecCanadaMMSI 003160028VHF 40range 40 NM16 NM from the area
- DSCDSC Station MontrealJRCC QuebecCanadaMMSI 003160028VHF 40range 40 NM21 NM from the area
- DSCDSC Station L’AcadieJRCC QuebecCanadaMMSI 003160028VHF 40range 40 NM30 NM from the area
- DSCDSC Station Mont RigaudJRCC QuebecCanadaMMSI 003160028VHF 40range 40 NM47 NM from the area
Worked out automatically from the warning text on 03 Nov 2026, 16:37 UTC. It can be wrong: the official warning text is the authority.