River Conditions
Illustrated map of Allegheny Reservoir

River stage

Glendon, Lehigh River

River level
9.10 ft
Status
Below flood stage
7-day change
+1.96 ft
Recent high
10.07 ft
Recent low
7.12 ft

Last reported 2026-10-13 | NWS GLDP1

30-day change
+1.64 ft
Average
7.59 ft
Readings
122
Data span
122 days
Record crest
27.90 ft

In brief

The Lehigh River at Glendon, PA read 9.10 ft on Oct 13, 2026, 6.90 ft below action stage. That is 1.64 ft higher than 30 days earlier.

Source: National Weather Service gauge GLDP1

Water 61 °F (16 °C) · 2 °F warmer than normal for this date · +1 °F in 24 hours

River level timeline

6.77.78.69.510.5SEP 13SEP 18SEP 23SEP 28OCT 03OCT 08OCT 13HIGH 10.07LOW 7.129.25 ftLAST READING

Stage threshold profile

Action stage 16.00 ftMinor flooding 19.00 ftModerate flooding 20.00 ftMajor flooding 21.00 ft CURRENT 9.10 ft

Highest crests on record

RankCrestDate
1 27.90 ft 2005-04-03
2 27.90 ft 2006-06-28
3 24.86 ft 1972-06-23
4 24.50 ft 2004-09-18
5 24.11 ft 2021-09-02
6 22.50 ft 2011-03-11
7 22.44 ft 1979-01-25
8 21.45 ft 2011-09-09

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

What happens at each level

  1. 16.00 ft

    Low lying roads in Easton near the confluence with the Delaware are flooded.

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

Frequently asked questions

Is the Lehigh River flooding at Glendon?

No. The Lehigh River at Glendon is at 9.1 ft, 6.9 ft below action stage.

What is the flood stage at Glendon?

The National Weather Service sets action stage 16 ft, minor flooding 19 ft, moderate flooding 20 ft and major flooding 21 ft.

What is the highest the Lehigh River has been at Glendon?

The highest crest on record is 27.9 ft, on 2005-04-03.

Is the Lehigh River high or low right now at Glendon?

At 9.1 ft it is higher than 97% of readings over the last 122 days.

How warm is the water at Glendon, Lehigh River?

The water temperature at Glendon, Lehigh River is 61 °F (15.9 °C), measured 6:45 pm by USGS, which is 2 °F warmer than normal for this date over the past ten years. It has risen 1.1 °F in the last 24 hours.

Stage and flood information from the NOAA National Weather Service (gauge GLDP1); daily history from the U.S. Geological Survey (site 01454700). Last reading 2026-10-13. For flood safety decisions always follow official National Weather Service warnings.