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Flood warning issued for Grand River watershed

nith river
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NEWS RELEASE
GRAND RIVER CONSERVATION AUTHORITY
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The Grand River Conservation Authority (GRCA) is issuing the following Flood Warning message for the communities of New Hamburg, Ayr and Drayton.

Over the past 24 hours, the Grand River watershed has received between 60 mm to 100 mm of rainfall throughout. Flows in local waterways have begun to increase and are forecasted to remain elevated into the weekend, increasing the safety risk around rivers and streams throughout the watershed. Runoff from this event has caused flooding in urban areas including Schneider Creek through the City of Kitchener.

At this time, a Flood Warning is being issued for:

  • Conestogo River (Drayton): Flows in the Conestogo River through Drayton are expected to peak in Flood Warning Zone 1 early Thursday morning. Municipal Flood Coordinators have been advised to notify affected residents and monitor conditions.
  • Nith River (New Hamburg and Ayr): Flows in the Nith River through New Hamburg and Ayr are expected to reach Flood Warning Zone 1. Flows are expected to peak in New Hamburg midday Thursday, September 23 and through Ayr in the early morning of Friday, September 24, based on the current forecast. Municipal Flood Coordinators in these communities are advised to warn affected residents. Municipal Flood Coordinators in Flood Warning areas are advised to take all necessary actions to prepare for the forecasted flood conditions. Residents and businesses located in the floodplain should prepare for the risk of flooding and ensure they are aware of their local municipal flood response plans.

The flood coordinator for Woolwich Township closed the low level bridge upstream of St. Jacobs at 1505 Three Bridges Road on Wednesday afternoon. It is anticipated that this closure will remain in effect throughout the weekend until flows in the Conestogo River recede.

The GRCA’s major reservoirs at Belwood, Conestogo, Guelph, Luther, Woolwich, Laurel and Shade’s Mills are being used to store runoff from this event and help reduce flooding downstream of these reservoirs. The GRCA is actively operating smaller dams at Wellesley and New Dundee to help manage the runoff from this rainfall event.

Stay Safe

The public is encouraged to exercise caution around all local waterways. Banks adjacent to rivers and creeks are very slippery and, when combined with fast-moving water, pose a serious hazard. Parents are reminded to keep their children and pets away from all watercourses.

This message will remain in effect until noon on Friday, September 24, 2021. Updated flood messages will be issued as conditions develop and updated forecast information becomes available.

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Current Weather

Chance of flurries

Chance of flurries

-6.9°C

Pressure
102.4 Item
Visibility
16.1 km
Dewpoint
-10.5 °C
Humidity
76%
Wind
S 11 km/h

Radar Satellite


12 Hour Forecast

Today
11 AM
-7°C
Chance of flurries
Today
12 PM
-5°C
Chance of flurries
Today
1 PM
-4°C
Chance of flurries
Today
2 PM
-4°C
Chance of flurries
Today
3 PM
-4°C
Chance of flurries
Today
4 PM
-4°C
Chance of flurries
Today
5 PM
-5°C
Chance of flurries
Today
6 PM
-6°C
Cloudy
Today
7 PM
-7°C
Cloudy
Today
8 PM
-7°C
Cloudy
Today
9 PM
-7°C
Chance of flurries
Today
10 PM
-7°C
Chance of flurries

7 Day Forecast

Chance of flurries

Today

-4 °C

Cloudy. 60 percent chance of flurries. Wind becoming west 20 km/h near noon. High minus 4. Wind chill near minus 13. UV index 1 or low.


Chance of flurries

Tonight

-11 °C

Mainly cloudy. 60 percent chance of flurries late this evening and overnight. Wind west 20 km/h gusting to 40. Low minus 11. Wind chill minus 13 this evening and minus 19 overnight.


Chance of flurries

Tuesday

-8 °C

Mainly cloudy. 40 percent chance of flurries in the morning. Wind northwest 20 km/h becoming light early in the morning. Temperature steady near minus 8. Wind chill minus 19 in the morning and minus 11 in the afternoon. UV index 1 or low.


Chance of flurries

Tuesday night

-13 °C

Cloudy periods with 40 percent chance of flurries. Low minus 13.


Chance of flurries

Wednesday

-8 °C

A mix of sun and cloud with 40 percent chance of flurries. High minus 8.


Chance of flurries

Wednesday night

-12 °C

Cloudy periods with 40 percent chance of flurries. Low minus 12.


Chance of flurries

Thursday

-5 °C

A mix of sun and cloud with 60 percent chance of flurries. High minus 5.


Chance of flurries

Thursday night

-14 °C

Cloudy periods with 60 percent chance of flurries. Low minus 14.


Chance of flurries

Friday

-14 °C

A mix of sun and cloud with 60 percent chance of flurries. High minus 14.


Chance of flurries

Friday night

-17 °C

Cloudy periods with 40 percent chance of flurries. Low minus 17.


Chance of flurries

Saturday

-6 °C

Cloudy with 40 percent chance of flurries. High minus 6.


Cloudy

Saturday night

-6 °C

Cloudy. Low minus 6.


Chance of flurries

Sunday

-2 °C

Cloudy with 60 percent chance of flurries. High minus 2.


Yesterday

Low
-9.8 °C
High
1.2 °C
Precipitation
4.2 mm

Normals

Low
-11 °C
High
-3 °C

Sunrise and Sunset

Sunrise
7:41 AM
Sunset
5:30 PM

Record Values

Type Year Value
Max 2008 8.0 C
Min 2003 -29.1 C
Rainfall 0 mm
Snowfall 0 cm
Precipitation 2008 2.0 mm
Snow On Ground 0 cm

Based on Environment Canada data

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