Flood Warning 04.14.14




Flood Warning in effect from Dalhousie Lake to Galetta on the Mississippi and Clyde Rivers

APRIL 14, 2014 MISSISSIPPI VALLEY WATERSHEDA FLOOD WARNING is now in effect for the Clyde River, Fall River, and Mississippi River from Dalhousie Lake through to the outlet at Galetta. Rainfall over the weekend coupled with the remainder of the snowmelt has caused flows and levels to increase significantly. Additional rainfall over the next 48 hours is expected to exacerbate the conditions across the eastern portion of the Mississippi River watershed.

DALHOUSIE LAKE – water levels have increased approximately 35 cm from Friday and are expected to increase at least another 20 – 25 cm over the next 3 to 4 days depending on rainfall over that same time frame. Levels are expected to be higher than those experienced in 2008 but approximately 20 cm below those experienced in the 1998 and 2002 flood events.

CLYDE RIVER – flows in the Clyde River are now above average for spring and are not expected to peak until at least Thursday with the forecasted rain. Cottages along the river between Cedardale and Lanark normally susceptible to spring flooding should maintain a close watch on levels.

FALL RIVER – flows within the Fall River watershed have increased dramatically over the weekend and are not expected to peak before Wednesday. Levels on Sharbot Lake, Bennett Lake and through Fallbrook Village are higher than normal for this time of year.

MISSISSIPPI LAKE – water levels on the lake increased 0.4 m over the weekend and are expected to increase at least 0.3 m to 0.5 m over the next week bringing levels to 135.3 to 135.50 m in elevation. The lower end of that range would equal conditions experienced in 2008, the upper end would still be 25 cm below those experienced in 1998

MISSISSIPPI RIVER FROM INNISVILLE TO GALETTA – levels in the river at Innisville continue to increase and are expected to increase 10 – 15 cm before they peak later this week.  Levels in the river from Carleton Place through to Galetta have responded quickly to the rainfall over the weekend. The river is not expected to peak until the end of next week with conditions slightly above those experienced in 2008.

The Carp River continues to recede and is not expected to increase substantially for the remainder of this spring. No further updates will be provided on the Carp River unless conditions warrant it.

Residents are strongly urged to stay off all ice covered water bodies and to remind children about the dangers of playing on or near ice covered surfaces or fast flowing water in ditches and smaller creeks.

This FLOOD WARNING is valid through April 15, 2014.

Daily water levels and flows are available on the MVCA website at www.mvc.on.ca/water-levels.

The Mississippi Valley Conservation Authority (MVCA) flood forecasting and warning program monitors weather conditions, snowpack water content, estimates expected river flows and water levels and issues flood advisories or warnings as required. MVCA provides early warning and continuous monitoring to municipal and provincial emergency response personnel through a flood event.

Contact: Gord Mountenay, C.E.T.
Water Management Supervisor
613-253-0006 ext. 233
info@mvc.on.ca               www.mvc.on.ca


A Watershed Conditions Statement is NOT a flood warning. Its purpose is to raise public awareness about a change or potential change in watershed conditions.

See below for watershed conditions terminology:

Watershed Conditions Statement: general notice of weather conditions that could pose a risk to personal safety or which have the potential to lead to flooding. There are two variations of these:
Watershed Conditions Statement – Water Safety: High flows, unsafe banks, melting ice or other factors could be dangerous for recreational users such as anglers, canoeists, hikers, children, pets, etc. Flooding is not expected.
Watershed Conditions Statement – Flood Outlook: Early notice of the potential for flooding based on weather forecasts calling for heavy rain, snow melt, high wind or other conditions that could lead to high runoff, cause ice jams, lakeshore flooding or erosion.
Flood Watch: Flooding is possible in specific watercourse or municipalities. Municipalities, emergency services and individual landowners in flood-prone areas should prepare.
Flood Warning: Flooding is imminent or already occurring in specific watercourses or municipalities. Municipalities and individuals should take action to deal with flood conditions. This may include road closures and evacuations.

Understanding Flood Status Messages