Moon Lake Reservoir
As of August 9, 2026, Moon Lake Reservoir is holding 10,098 acre-ft of water — 44% of normal storage for this date. Storage data refreshed throughout the day.
Moon Lake Reservoir
Moon Lake Reservoir is a man-made lake located in the Ashley National Forest in northeastern Utah. The reservoir was constructed in the early 1900s to store water for agricultural purposes in the Uinta Basin. The water in the reservoir comes from snowmelt and surface runoff from surrounding mountains. The reservoir is also fed by the White River and tributaries. The water is used for irrigation in the surrounding agricultural areas and for recreational purposes such as fishing, camping, and boating. The reservoir has a capacity of over 76,000 acre-feet and covers an area of 2,800 acres. The surrounding area is popular for outdoor activities, including hiking, hunting, and snowmobiling in the winter. Moon Lake Reservoir is an important source of water for the region and provides significant benefits to the local communities.
Daily levels at Moon Lake Reservoir
Storage volume, pool elevation, and total release plotted from the operating agency's daily observations.
Storage
acre-ft · code 17
Inflow
cfs · code 29
Pool Elevation
ft · code 49
Total Release
cfs · code 42
Plan around the weather
Same NOAA / yr.no feed Snoflo's iOS app uses. Watch the precipitation column on the meteogram -- rain on the basin upstream typically lifts inflow 24-72 hours later.
Next 5 days, hour by hour
Temperature line with weather symbols on top, snow + rain accumulation as columns, humidity as a dotted line.
5-day forecast table
Every 3 hours, broken out across temperature, snow, rain, humidity, and wind. Each cell is colour-coded relative to the column min/max.
| Time | Condition | Temp (°F) | Snow (in) | Rain (in) | Humidity (%) | Wind (mps) | Wind dir |
|---|---|---|---|---|---|---|---|
| Loading detailed forecast… | |||||||
15-day temperature & precipitation
Daily temperatures, snow, and rain projected over the next two weeks.
Nearby streamflow gauges
USGS streamgauges around Moon Lake Reservoir -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Lake Fork River Bl Moon Lake Nr Mountain Home | 21 cfs | → |
| Lake Fork River Ab Moon Lake | 40 cfs | → |
| Rock Creek Near Mountain Home | 89 cfs | → |
| Yellowstone R. At Bridge Campgrnd | 58 cfs | → |
| Yellowstone River Near Altonah | 79 cfs | → |
| Duchesne River Near Tabiona | 25 cfs | → |
About Moon Lake Reservoir
What is the water level at Moon Lake Reservoir right now?
As of August 9, 2026, Moon Lake Reservoir is holding 10,098 acre-ft, about 44% of normal for this date. Pool elevation and the year-over-year trend are shown above.
Is Moon Lake Reservoir high or low right now?
Compare the percent-of-normal figure on this page: above 100% means storage is higher than the historical average for the date (a wet year), below 100% means lower (a dry year or drought). The daily-levels chart shows the current trend.
Where does the data for Moon Lake Reservoir come from?
Daily storage, pool elevation, and release rates are sourced from USGS, USBR, and USACE monitoring stations. Weather forecast comes from NOAA / yr.no -- the same feed Snoflo's iOS app uses.
How often is the report updated?
Storage observations are updated daily by the operating agency. The 15-day weather forecast refreshes throughout the day. Snoflo caches and renders the most recent observation -- check the "as of" timestamp on the storage card.
What does the Hazard hazard rating mean?
The Corps of Engineers' hazard potential classification grades probable consequences if the dam fails: High = probable loss of human life; Significant = no probable loss of human life but possible economic loss / environmental damage; Low = no probable loss of human life, only minor economic / environmental losses. See the Dam Data Reference card below for the full definitions.
What's "% of normal"?
The current storage value compared to the historical average storage on this calendar day. 100% = right on average; values above 100% mean above-normal storage (wet year); values below mean below-normal (dry year or drought).
Can I get alerts when storage crosses a threshold?
Yes -- alerts are managed in the Snoflo iOS app. Favorite this reservoir, set a threshold, and you'll get a push the moment conditions cross.
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