Issued at: 11:30 am, Friday January 18, 2019
Issued by: Maitland Conservation Flood Forecast Centre
Watershed Conditions Statement – Flood Outlook
An incoming arctic front bringing extreme cold is forecasted to arrive tonight and persist through Monday. The sudden drop to frigid temperatures, combined with open water and current flows on the Nine Mile River, will heighten the risk of frazil ice formation. Frazil ice can accumulate quickly and result in jams that obstruct river flow leading to flooding.
In the past, frazil ice formation has developed downstream of the Port Albert Fishway, causing localized flooding issues in the Central Syndenham St area.
It is recommended that Ashfield-Colborne-Wawanosh staff frequently monitor roads and Nine Mile River levels until conditions improve. Currently, temperatures are forecast to rise to above -10°C on Tuesday.
Maitland Conservation staff will continue to monitor conditions and will provide an update if warranted.
This message will remain in effect until 12:00 noon on Tuesday January 22, 2019.C
Water Resources Technician
Maitland Valley Conservation Authority
519-335-3557 ext. 243
Types of Flood Messages:
Watershed Conditions Statement – Water Safety – General watershed conditions are being assessed for high runoff potential that could lead to flooding, and to remind the public of general river safety issues.
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 watercourses 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