River Conditions
Illustrated map of Grand Lake St Marys

River stage

Worthington, Olentangy River

River level
1.68 ft
Status
Below flood stage
7-day change
-0.05 ft
Recent high
5.38 ft
Recent low
1.57 ft

Last reported 2026-10-13 | NWS WRTO1

30-day change
-0.61 ft
Average
2.23 ft
Readings
122
Data span
122 days
Record crest
15.68 ft

In brief

The Olentangy River at Worthington, OH read 1.68 ft on Oct 13, 2026, 6.32 ft below action stage. That is 0.61 ft lower than 30 days earlier.

Source: National Weather Service gauge WRTO1

River level timeline

1.31.92.42.93.5SEP 13SEP 18SEP 23SEP 28OCT 03OCT 08OCT 13HIGH 3.23LOW 1.571.65 ftLAST READING

Stage threshold profile

Action stage 8.00 ftMinor flooding 11.00 ftModerate flooding 13.00 ftMajor flooding 15.00 ft CURRENT 1.68 ft

Highest crests on record

RankCrestDate
1 15.68 ft 1959-01-21
2 15.30 ft 1952-01-10
3 13.57 ft 2020-05-19
4 12.66 ft 1964-03-10
5 12.41 ft 2016-06-23
6 11.68 ft 1963-03-04
7 11.58 ft 1957-05-20
8 11.55 ft 1973-06-20

Flood crests recorded at this gauge by the National Weather Service.

What happens at each level

  1. 8.00 ft

    Flooding of yards begins along the Olentangy River near Mount Air in northern Franklin County, only in low-lying areas between Olentangy River Road and the river.

  2. 9.00 ft

    Flooding spreads further into yards of homes near the river in Mount Air, between Olentangy River Road and the river.

  3. 10.00 ft

    Flood waters approach residences along the river in Mount Air, between Olentangy River Road and the river itself.

  4. 11.00 ft

    Floodwater surrounds homes along Edgecliff Drive, as well as Plum Tree Drive in Worthington, cutting off residents.

  5. 12.00 ft

    Homes along Edgecliff Drive in Mt. Air flood, as well as the playground of Olentangy Park. Olentangy River Road is flooded and impassible from near Powell Road to near Jewett Road.

  6. 13.00 ft

    Several homes along Edgecliff Drive in Mt. Air flood, and flooding worsens in low areas along the Olentangy River in Mount Air, and lowland areas near the river in Worthington experience flooding. Olentangy River Road near Powell also is flooded, with backwater flooding also affecting some side streets onto Olentangy River Road. Flooding in and near Worthington is confined to Olentangy Park and along the bike trail.

  7. 15.00 ft

    Homes in Mt. Air are severely flooded along Edgecliff and Plumtree Drives close to the river, with Olentangy River Road flooded in areas from near Hyatts Road to Jewett Road. Flooding worsens near Worthington near Olentangy Park and along the bike trail.

  8. 17.00 ft

    This is above the FEMA 1 percent flood. Homes flood along Rosslyn and Kanawha Avenues and Tucker Drive in Worthington, with severe flooding along Edgecliff and Plumtree Drives in Mount Air, and along Olentangy River Road in Powell. Much of Olentangy Park and the bike trail are flooded. Flooding extends onto the back of properties along Masefield Street. The OhioHealth Primary Care facility also floods, with water also approaching the Powell Waste Water Treatment Plant. Whetstone High School may also flood.

  9. 18.00 ft

    Widespread flooding occurs in sections of Worthington near the river, with homes flooded along Edgecliff and Plumtree Drives in Mount Air. Some flooding begins at the Powell Waste Water Treatment Plant.

  10. 18.50 ft

    This would roughly equal the FEMA 500 year or 0.2 percent flood event. Significant flooding of homes on Plumtree and Edgecliff Drives in Mount Air occurs east of Route 315, with the Powell Waste Water Treatment Plant in southern Delaware County also flooded. Substantial flooding occurs along Rivers Edge Drive and Mount Air Place. Flooding would occur on The Ohio State campus, from along and north of Herrick Drive to Woody Hayes Drive, in areas west of Tuttle Park Place.

Written by the local National Weather Service forecast office for this exact gauge.

Frequently asked questions

Is the Olentangy River flooding at Worthington?

No. The Olentangy River at Worthington is at 1.68 ft, 6.32 ft below action stage.

What is the flood stage at Worthington?

The National Weather Service sets action stage 8 ft, minor flooding 11 ft, moderate flooding 13 ft and major flooding 15 ft.

What is the highest the Olentangy River has been at Worthington?

The highest crest on record is 15.68 ft, on 1959-01-21.

Is the Olentangy River high or low right now at Worthington?

At 1.68 ft it is higher than 6% of readings over the last 122 days.

Stage and flood information from the NOAA National Weather Service (gauge WRTO1); daily history from the U.S. Geological Survey (site 03226800). Last reading 2026-10-13. For flood safety decisions always follow official National Weather Service warnings.