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Yellowstone River Utah near Altonah

Highest listed crest 4.93 ftFlood stage 4.7 ft9 crests since 1949

The Yellowstone River Utah near Altonah crested above flood stage 1 time among the 9 crests the National Weather Service lists from 1949 to 2003. The highest, 4.93 ft on June 11, 1990, was moderate flooding, 0.23 feet above flood stage.

The gauge

Highest listed crest
4.93 ft
June 11, 1990; 2,360 cubic feet per second
Flood stage
4.7 ft
Major flooding from 5.2 ft
Crests at major
0
1 above flood stage
Most recent flood crest
June 11, 1990
4.93 ft, moderate flooding
Location
Duchesne County
Utah

Flood stages

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

Flood categories, Yellowstone River Utah near Altonah
Action stage4.33Jun 20, 1999The level at which the NWS or its partners begin to take action
Flood stage (minor)4.70—Minimal or no property damage, but possibly some public threat
Moderate flood stage4.91Jun 11, 1990Some inundation of structures and roads near the stream
Major flood stage5.20—Extensive inundation of structures and roads

Every listed crest

9 crests from 1949 to 2003. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the Yellowstone River Utah near Altonah, 1949 to 2003 33.544.555.5ft Flood stage 4.7 ftMajor 5.2 ft Jun 19, 1949: 4.55 ft, action stage; 1,880 cubic feet per secondJun 19, 1983: 4.24 ft, below flood stage; 2,240 cubic feet per secondJun 5, 1986: 4.34 ft, action stage; 2,134 cubic feet per secondJun 11, 1990: 4.93 ft, moderate flooding; 2,360 cubic feet per secondJun 28, 1995: 4.22 ft, below flood stage; 2,070 cubic feet per secondJun 27, 1998: 3.74 ft, below flood stage; 1,540 cubic feet per secondJun 20, 1999: 4.50 ft, action stage; 2,670 cubic feet per secondMay 26, 2001: 3.36 ft, below flood stage; 1,200 cubic feet per secondMay 27, 2003: 3.46 ft, below flood stage; 1,430 cubic feet per second Highest, 4.93 ft, Jun 11, 1990 195019601970198019902000

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, Yellowstone River Utah near Altonah 1940s: 0 1950s: 0 1960s: 0 1970s: 0 1980s: 0 1990s: 1 1 2000s: 0 1940s1950s1960s1970s1980s1990s2000s
  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, Yellowstone River Utah near Altonah
1Jun 11, 19904.93+0.23Moderate2,360
2Jun 19, 19494.55−0.15Action1,880
3Jun 20, 19994.50−0.20Action2,670
4Jun 5, 19864.34−0.36Action2,134
5Jun 19, 19834.24−0.46Below flood stage2,240
6Jun 28, 19954.22−0.48Below flood stage2,070
7Jun 27, 19983.74−0.96Below flood stage1,540
8May 27, 20033.46−1.24Below flood stage1,430
9May 26, 20013.36−1.34Below flood stage1,200

Other gauges in Duchesne County

Flood gauges in Duchesne County
Myton9.412.40 ft, Jun 10, 19224
Tabiona5.65.92 ft, Jun 16, 19720
Mountain Home5.96.26 ft, Jun 4, 19860

Duchesne County: every hazard · River floods across the country · Utah

NOAA National Water Prediction Service, gauge YLLU1, 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.