National Weather Service United States Department of Commerce

...Changes in River Flood Services for the Tuscarawas, Mahoning, Chagrin, Black, and Scioto Rivers...

Effective immediately, flood warning services will be temporarily suspended for the Tuscarawas River in Massillon from early to mid-November 2019 through winter 2020. The USGS in Columbus Ohio notified the National Weather Service (NWS) Weather Forecast Office in Cleveland (CLE) that the river gage on the Tuscarawas River in Massillon Ohio has recently been moved. The previous gage site located at the Massillon Wastewater Treatment Plant was situated at a level where it was susceptible to over topping at flood stage. For this reason, the USGS moved the gage to the Walnut Street bridge 1.4 river miles upstream of the current location. The NWS site identifier MLNO1 will remain the same, however adjustments will be necessary to the flood stages. Once new flood thresholds have been established, flood warning services will be reinstated for Massillon. The suspension of services could last through winter 2020.

Effective November 22, 2019 the National Weather Service will change the official flood stage at the Mahoning River official forecast point at Leavittsburg. The minor flood stage will change from 10.0 feet to 12.5 feet, moderate flood stage will change from 13.5 to 14.0 feet, and major flood stage will remain 15.0 feet.

Effective January 10, 2020 the following changes will be implemented for the Black, Chagrin, and Scioto Rivers. For the Black River at Elyria moderate flood stage will be raised from 14.0 feet to 17.0 feet, and major flood stage will be raised from 18.0 feet to 20.0 feet. For the Chagrin River at Willoughby minor flood stage will be raised from 11.0 feet to 12.0 feet, and moderate flood stage raised from 13.0 feet to 14.0 feet. For the Scioto River at La Rue minor flood stage will be raised from 11.0 feet to 12.0 feet.

 

Table 1: NWS River Forecast Point Flood Stages for the Mahoning River at Leavittsburg

Flood Category

Current

Proposed

Action

7

10

Minor

10

12.5

Moderate

13.5

14.0

Major

15.0

15.0

 

 

Table 2: NWS River Forecast Point Flood Stages for the Black River at Elyria

Flood Category

Current

Proposed

Action

7

7

Minor

9.5

9.5

Moderate

14.0

17.0

Major

18.0

20.0

 

 

 

Table 3: NWS River Forecast Point Flood Stages for the Chagrin River at Willoughby

Flood Category

Current

Proposed

Action

8

9.0

Minor

11.0

12.0

Moderate

13.0

14.0

Major

16.0

16.0

 

 

 

Table 4: NWS River Forecast Point Flood Stages for the Scioto River at La Rue

Flood Category

Current

Proposed

Action

8

8.0

Minor

11.0

12.0

Moderate

13.0

13.0

Major

14.0

14.0

 

 

 

The NWS, Ohio River Forecast Center (OHRFC), and Local and County Officials have supported the above corrections. If you have feedback or questions regarding these changes please contact sarah.jamison@noaa.gov.

The data and forecasts for is site can be found at: http://water.weather.gov/ahps

The data for these sites are provided by our partner the USGS. Without this critical data forecasts and warnings would not be possible. The USGS website is : HTTP://OH.WATER.USGS.GOV