Flood Watch issued for Grand River watershed

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GRCAFloodWarning

 

 

 

 

The heavy rains and warm temperatures predicted for this week are expected to raise water levels in streams and rivers throughout the watershed.  A total of 75-100 mm of precipitation is expected to fall over much of the watershed during the next four days. The first of a series of rainfall events is expected Monday evening with forecast amounts of 10 to 15 mm of rainfall. The rainfall, along with the melt of any remaining snow in the upper watershed will cause river levels to rise.

 

https://twitter.com/grca_flood_msg/status/321343266505240576

 

Upstream reservoirs levels are currently being lowered to provide additional storage to reduce downstream flooding. The GRCA’s flood forecasting model is prepared to provide expected water level details as the rain and snow melt occurs.

River levels will rise over the next few days as water runs off. Flooding is anticipated in low lying areas along the Grand, Conestogo, Nith and Speed Rivers later this week. Water levels are expected to remain high throughout the week and into the weekend, particularly in the southern river. The low level bridge in St. Jacob’s has already been closed due to high flows in the Conestogo River and will remain closed until further notice.

Updated flood messages will be issued as this event unfolds. Regional police and municipal staff are encouraged to review their flood procedures in anticipation of this event.

Banks adjacent to rivers and creeks are slippery and when combined with cold, fast-moving water pose a serious hazard. Ice on ponds will be thin. Parents are encouraged to keep their children and pets away from water courses and off any remaining frozen water bodies.

* Download a river safety booklet  for children at www.grandriver.ca/riversafety/riversafety.cfm

* Information on river levels can be found in the River Data section of the GRCA website.

* Information on the flood warning system can be found in the Flood Management   section of the website.

For the Silo, Cam Linwood

1 Comment to Flood Watch issued for Grand River watershed

  1. Dave Schultz

    Wednesday, April 10, 2013 @ 3 p.m.

    Flood warning: High water throughout Grand River watershed
    The heavy rains predicted for this week are raising water levels in streams and
    rivers throughout the watershed.
    A total of 30-45 mm of precipitation has already fallen over most of the watershed
    during the past two days.
    This complex weather system is predicted to continue over the next two days bringing
    steady rain and the potential for freezing rain on Thursday. An additional 50-70 mm
    of precipitation could fall across the watershed before the precipitation ends on
    Friday. As river levels continue to rise, the potential exists for flooding in
    numerous communities.
    Flooding will continue in low lying areas along the Grand, Nith, Conestogo and Speed
    Rivers. Discharges from reservoirs were increased earlier in the week to maintain
    flood storage capacity. The series of rainfall events and reservoir discharges will
    result in extended periods of high river flows. Water levels are expected to remain
    high throughout the weekend across the watershed.
    Based on a possible 30 mm of rain overnight and rain and freezing rain on Thursday,
    the increasing river flows will require a close watch of flood prone areas. The
    following flood warning and flood watch messages should be reviewed by watershed
    flood co-ordinators to determine the need to prepare for and/or respond to requested
    actions.

    FLOOD WARNING (ACTIONS)
    Speed River in Cambridge
    The Speed River in Cambridge is expected to reach flows above 50 cubic metres per
    second late Wednesday which will exceed the capacity of the Black Bridge Road bridge
    and the walking trail under Hwy. 401. The City of Cambridge is asked to arrange for
    closures at these locations. Flows in Speed River are expected to peak on Saturday,
    so these closures will be maintained through the weekend.
    Grand River in West Montrose
    Flows in the Grand River through West Montrose are currently flooding the banks
    adjacent to the West Montrose campground and will approach channel capacity on
    Friday. The flood co-ordinator for Woolwich Township is requested to warn residents
    of West Montrose and monitor conditions for possible road closures. Waterloo
    Regional Police are asked to contact any residents of the West Montrose campground.

    FLOOD WATCH MESSAGES

    Nith River in New Hamburg and Ayr
    Based on a possible 30 mm of rain overnight and rain/freezing rain on Thursday, the
    Nith River flows are expected to peak above Level 1 in New Hamburg and Ayr on
    Thursday and may reach Level 2 Friday.

    * In New Hamburg a Level 1 flood warning applies to residents in the Milton
    Street and Jacob Street areas. Levels in New Hamburg are expected to peak late
    Thursday evening.

    * In the Village of Ayr, the Level 1 flood warning applies to residents
    along Tannery and Piper streets. Residents are advised not to park vehicles in low
    lying areas overnight tonight and for the next few days. Levels in Ayr are expected
    to peak late Thursday and remain high through the remainder of the week.
    The GRCA will confirm with Waterloo Regional police and municipal staff on Thursday
    if they need to warn residents in the Level 1 flood areas of these communities or
    prepare for Level 2 conditions on Friday.
    Nith River through Oxford County
    The road superintendent for Oxford County is asked to check roads along the Nith
    River in the vicinity of Wolverton. The Nith is expected to crest through Wolverton
    on Saturday and may result in the need to close some local roads. Also the Peace
    Haven Scout camp should be contacted and warned as flows are expected to flood the
    Scout camp.
    Conestogo River in Drayton
    Flows in the Conestogo River through Drayton will peak Friday. The flood
    co-ordinator for Mapleton is asked to monitor conditions in Drayton.
    Conestogo River in St. Jacobs
    Flows in the Conestogo River have forced the closure of the low level bridge
    upstream of St. Jacobs. The flood coordinator of Woolwich Township is asked to
    maintain closure of this bridge until further notice.
    Speed River below Guelph
    The Speed River will peak through Guelph around mid-day Friday morning and may cause
    flooding of Riverbend Park just downstream of Guelph. The OPP may be asked to warn
    the trailer park and residents at this site.
    Grand River in Grand Valley and Waldemar
    Flows in the Grand River through Grand Valley and Waldemar are expected to peak on
    Friday. The flood co-ordinators for Grand Valley and Waldemar should prepare for a
    closure of the low portion of Dufferin County Road 25 (Main Street) through Grand
    Valley and monitor conditions through the Village of Waldemar.
    Grand River through Centre-Welington
    Discharge from Shand Dam has been increased to maintain flood storage capacity in
    the Belwood Reservoir. This discharge will be maintained thorough the weekend. The
    flood co-ordinator for Centre-Wellington has advised property owners on West Mill
    Street in Elora to prepare for high flows along the boardwalk.
    Grand River in Kitchener
    Low lying areas along the Grand River including Bingemans Park are expected to be
    flooded for the remainder of the week. Flood flows are expected to peak on Friday.
    Grand River in Cambridge
    Flows and levels in the Grand River through Cambridge are expected to peak late
    Friday evening and may require closure of Highway 24 south of Concession Street. The
    flood co-ordinator for the City of Cambridge is requested to arrange monitoring of
    Highway 24 on Friday and close the road if necessary.
    Grand River in Brantford
    Flows in the Grand River through Brantford are expected to peak on Saturday and are
    expected to force the closure of Gilkison Avenue late Thursday afternoon. The flood
    co-ordinator for the City of Brantford is requested to prepare for the closure of
    Gilkison Avenue.
    Grand River in Brant County
    The road superintendent for Brant County is asked to monitor roads in the vicinity
    of the Six Nations – Brant County boundary along the Grand. Flooding may result in
    the need to close some of these roads.
    Grand River through Six Nations
    Flows in the Grand River through Six Nations territory are expected to peak on
    Saturday. Low-lying areas along the river can expect to be flooded. Flows are
    expected to force the closure of Six Nations 4th Line and Bateman Line late
    Thursday. The flood co-ordinator for Six Nations is asked to arrange closure of
    these roads.
    Grand River through Haldimand County
    The Grand River will peak through Haldimand County late Saturday into early Sunday
    morning in York, Cayuga and Dunnville. Campgrounds along the river can expect to be
    flooded by this event. The flood co-ordinator for Haldimand County is asked to warn
    the trailer parks and residents along Grand River Sports Road downstream of the
    village of York. Backyard flooding of properties in Dunnville may occur.

    * * *
    Banks adjacent to rivers and creeks are slippery and when combined with cold,
    fast-moving water pose a serious hazard. Parents are encouraged to keep their
    children and pets away from water courses and off any remaining frozen water bodies.
    An updated flood message will be issued on Thursday morning to confirm the status of
    these watches and the need for any additional actions. Police and municipal staff
    are encouraged to review their flood procedures in anticipation of any required
    actions.

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