Temiscaming
Temiscaming
Otto Holden
Otto Holden
Mattawa
Mattawa
Des Joachims
Des Joachims
Pembroke
Pembroke
Fort-Coulonge
Fort-Coulonge
Chenaux
Chenaux
Arnprior
Arnprior
Ottawa
Ottawa
Gatineau
Gatineau
Thurso
Grenville
Grenville
Grenville
Maniwaki
Maniwaki
Carillon
Carillon
Montreal
Ottawa River Basin

Publication: 2019-05-23 17:00

Water levels at 8 a.m. in metres
Mattawa 155.21
Pembroke 113.33
Lake Coulonge at Fort-Coulonge 108.62
Chats Lake at Arnprior 75.66
Lake Deschenes at Britannia (Ottawa) 60.15
Gatineau (Hull) 44.30
Grenville 42.11
Gatineau River at Maniwaki 166.18
Outflow in cubic metres per second
Ottawa River at Carillon 6,950

River Conditions Forecast

Significant rainfall of 10 to 30 mm is expected over a large part of the watershed today and tomorrow. Upper reservoirs in the northern portion of the basin continue to retain spring runoff to minimize flooding in the downstream river system. In the Abitibi-Timiskaming area, where reservoirs are full, excess runoff will remain significant due to additional precipitation which continues to flow to downstream locations. From Mattawa down to the Lac Coulonge area, levels are expected to stop declining and remain stable over the next few days. From the Chats Lake region down to the Lac Deschenes area, level decline is expected to slow, with levels possibly becoming stable over the next few days. For the lower reach from Gatineau(Hull) down to the Hawkesbury/Grenville region, levels are expected to stop declining and to stabilize over the next few days. Temporary slight increases in water levels are possible in all locations, depending on the amount of precipitation received.
2019-05-23 17:00 Forecast Peak Levels

This message will be updated
on May 24, 2019 at 5 p.m..

Observed levels and flows
Ottawa River Basin

Water levels at 24:00 in metres 2019-05-16 2019-05-17 2019-05-18 2019-05-19 2019-05-20 2019-05-21 2019-05-22
Otto Holden Generating Station 176.57 176.57 176.56 176.60 176.58 176.58 176.58
Mattawa 155.29 155.24 155.21 155.18 155.26 155.28 155.24
Des Joachims Generating Station 150.30 150.28 150.27 150.32 150.33 150.28 150.30
Pembroke 113.46 113.45 113.43 113.39 113.37 113.38 113.36
Lake Coulonge at Fort-Coulonge 108.97 108.89 108.81 108.74 108.68 108.65 108.64
Chenaux Generating Station 85.22 85.15 85.25 85.29 85.24 85.32 85.32
Chats Lake at Arnprior 76.03 75.96 75.86 75.81 75.74 75.70 75.68
Lake Deschenes at Britannia (Ottawa) 60.52 60.47 60.41 60.33 60.29 60.22 60.17
Gatineau (Hull) 44.81 44.71 44.63 44.56 44.48 44.37 44.30
Thurso 43.31 43.23 43.15 43.10 43.03 42.94 42.87
Grenville 42.46 42.41 42.33 42.28 42.27 42.19 42.12
Gatineau River at Maniwaki 165.83 165.92 166.03 166.16 166.19 166.20 166.17
Average daily outflow (m3/s) 2019-05-16 2019-05-17 2019-05-18 2019-05-19 2019-05-20 2019-05-21 2019-05-22
Ottawa River at Temiscaming 3,113 3,117 3,051 3,033 3,042 3,045 3,004
Ottawa River at Otto Holden GS 3,227 3,204 3,161 3,125 3,167 3,172 3,133
Ottawa River at Des Joachims GS 3,619 3,618 3,549 3,468 3,567 3,638 3,539
Ottawa River at Chenaux GS 4,371 4,263 4,134 4,033 3,944 3,874 3,843
Ottawa River at Chats Falls GS 5,638 5,472 5,307 5,132 4,996 4,869 4,798
Lake Deschenes at Britannia (Ottawa) 5,581 5,441 5,299 5,106 5,004 4,850 4,745
Ottawa River at Carillon 8,222 8,073 7,896 7,676 7,604 7,343 7,090