Major Flood
95 ft
Current Water Level
Gage Height
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Streamflow
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Last Reading
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This is an NWS forecast point (LID: GYBW4). Live data may be limited. View on NWS AHPS →
FLOOD STAGES
Know the flood categories.
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
Moderate Flood
93.5 ft
Minor Flood
92 ft
Action Stage
90 ft
What Floods at Each Level
95 ft
Levee around Greybull will be overtopped causing widespread flooding.
92 ft
Flood stage. Low lying flooding intensifies and becomes more widespread along southern areas of Greybull. Levee may be in danger of failing in many area with prolonged high flows. Corresponds to "7" reference point measured at staff gage under Highway 14 Bridge.
91.1 ft
Record high stage (6/8/1991). Estimated flow: 20,000 - 22,000 cfs.
91 ft
Water may begin to surge over low spots along the levee near the southern end of Greybull. Flooding expected along areas behind levee near southern areas of Greybull. Water will begin to surge against the rest of the levee throughout the town. Corresponds to "6" reference point measured at staff gage under Highway 14 Bridge.
90 ft
Bankfull stage. Constant monitoring of levee is needed. Water begins to surge against base of levee near the south end of Greybull. Corresponds to "d" reference point measured at base of dike under Highway 14 Bridge.
80 ft
Baseflow stage of the river (3880' elevation above sea level).
Impact statements from the National Weather Service, describing what typically happens at each water level.
7-Day Water Level Chart
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Historic Crests
| Date | Stage | Flow |
|---|---|---|
| Mar 9, 2014 | 93.5 ft | -9,999 cfs |
| Feb 22, 2017 | 91.9 ft | — |
| Jun 7, 1991 | 91.1 ft | 17,000 cfs |
About This Gauge
NWS LID
GYBW4
River
Bighorn River
County
Big Horn, WY
Coordinates
44.4887°N, 108.0470°W
Get Flood Alerts for Bighorn River
StormCast monitors this gauge and sends a push notification to your phone when the water level crosses into a new flood category — even at 3 AM.
Frequently Asked Questions
What is the current water level of Bighorn River at Greybull?
The Bighorn River at Greybull gauge is maintained by USGS and reports water levels every 15 minutes. Visit this page to see the latest reading updated live, or download StormCast to get push alerts when levels rise.
What is flood stage for Bighorn River at Greybull?
The NWS-defined flood stage for Bighorn River at Greybull is 92 feet. Action stage begins at 90 feet. Moderate flooding starts at 93.5 feet, and major flooding at 95 feet.
How do I get alerts when Bighorn River rises?
Download StormCast free on Google Play, go to River Gauges, and add Bighorn River at Greybull to your watchlist. StormCast will send a push notification to your phone whenever the water level crosses into a new NWS flood category.
Where is the Bighorn River at Greybull gauge located?
The gauge is located in Big Horn County, Wyoming at coordinates 44.4887°N, 108.0470°W. Data is provided by the U.S. Geological Survey and the National Weather Service.
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Source & Notes
- Stage measured manually and reported by river observer. No automated gauge on-site.