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Grande Ronde River near Perry

Highest listed crest 8.54 ftFlood stage 6.6 ft8 crests since 1997

The Grande Ronde River near Perry crested above flood stage 6 times among the 8 crests the National Weather Service lists from 1997 to 2020. The highest, 8.54 ft on February 7, 2020, was moderate flooding, 1.94 feet above flood stage. 1 other gauge on the Grande Ronde River crested above flood stage within a week of it.

The gauge

Highest listed crest
8.54 ft
February 7, 2020; 9,290 cubic feet per second
Flood stage
6.6 ft
No major stage set
Crests at major
0
6 above flood stage
Most recent flood crest
May 21, 2020
8.34 ft, moderate flooding
Location
Union County
Near La Grande (5.5 mi)

Flood stages

The thresholds the National Weather Service uses for this gauge today, and how many listed crests reached each.

Flood categories, Grande Ronde River near Perry
Action stage5.80—The level at which the NWS or its partners begin to take action
Flood stage (minor)6.62Mar 10, 2014Minimal or no property damage, but possibly some public threat
Moderate flood stage7.54May 21, 2020Some inundation of structures and roads near the stream

Every listed crest

8 crests from 1997 to 2020. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the Grande Ronde River near Perry, 1997 to 2020 56789ft Flood stage 6.6 ft Feb 7, 1997: 7.08 ft, minor flooding; 8,220 cubic feet per secondMay 26, 1998: 5.06 ft, below flood stage; 3,550 cubic feet per secondMar 27, 1999: 5.01 ft, below flood stage; 3,390 cubic feet per secondMay 16, 2011: 7.70 ft, moderate floodingMar 10, 2014: 7.41 ft, minor flooding; 7,028 cubic feet per secondApr 9, 2019: 7.70 ft, moderate flooding; 7,600 cubic feet per secondFeb 7, 2020: 8.54 ft, moderate flooding; 9,290 cubic feet per secondMay 21, 2020: 8.34 ft, moderate flooding; 8,890 cubic feet per second Highest, 8.54 ft, Feb 7, 2020 20002005201020152020

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, Grande Ronde River near Perry 1990s: 1 2000s: 0 2010s: 3 3 2020s: 2 1990s2000s2010s2020s
  1. These are the crests the local National Weather Service office lists for the gauge: the highest on record and recent crests. Lesser floods between them may be missing, so counts by decade are a floor.
  2. Categories use today's flood stages. Levees, dams and channel changes since a crest can make old and new stages not directly comparable.

Highest crests

Highest listed crests, Grande Ronde River near Perry
1Feb 7, 20208.54+1.94Moderate9,290
2May 21, 20208.34+1.74Moderate8,890
3May 16, 20117.70+1.10Moderate—
4Apr 9, 20197.70+1.10Moderate7,600
5Mar 10, 20147.41+0.81Minor7,028
6Feb 7, 19977.08+0.48Minor8,220
7May 26, 19985.06−1.54Below flood stage3,550
8Mar 27, 19995.01−1.59Below flood stage3,390

The worst floods along the Grande Ronde River

For this gauge's highest crests, the other gauges on the Grande Ronde River that crested above flood stage within a week.

February 7, 2020: 8.54 ft here, moderate flooding

  • TroyOR · Feb 7, 2020 · 11.73 ft · Moderate

March 10, 2014: 7.41 ft here, minor flooding

  • TroyOR · Mar 10, 2014 · 11.85 ft · Moderate

Gauges on the Grande Ronde River

In USGS station-number order, which runs downstream within a river basin.

Flood gauges on the Grande Ronde River
Perry this gaugeOR6.68.54 ft, Feb 7, 20200
TroyOR10.013.76 ft, Feb 9, 19962

Union County: every hazard · River floods across the country · Oregon

NOAA National Water Prediction Service, gauge LGNO3, retrieved October 30, 2026. Stages in feet on the gauge's own datum, not elevation. Crests are as the National Weather Service lists them; preliminary values may be revised.