WYOMING FLOW REPORT

Last Updated: December 21, 2025

Streamflow levels across Wyoming are currently 87.0% of normal, with the Snake River Ab Reservoir Nr Alpine Wy reporting the highest discharge in the state with 1730cfs and gauge stage of 2.98 ft. Meanwhile, the Greys River Ab Reservoir Nr Alpine Wy is seeing a spike in streamflows today after experiencing a 96.76% increase since yesterday, and currently running at 425cfs.

Maximum gauge stage in the state was last observed at the Gros Ventre River At Zenith Wy, currently reporting a stage of 18.04ft. The Greys River Ab Reservoir Nr Alpine Wy in the Greys-Hobock watershed is surging for this time of year at 425cfs, about 61.56% of normal.

       



Wyoming has a semi-arid climate with an average annual precipitation of 14 inches. The state contains major surface flows such as the Green River, North Platte River, and the Snake River. The Wind River Range contains the headwaters of the Green and Snake Rivers. The state has many reservoirs and dams that are used for irrigation, flood control, and hydroelectric power generation. Snowpack in the mountains is a critical source of water for Wyoming's rivers, and snowmelt runoff typically peaks in May and June. The state is also affected by drought conditions, which can lead to reduced water availability and increased wildfire risk. Overall, Wyoming's hydrology is influenced by its specific geography, climate, and water management practices.


       

Winter Storm Warnings

December 21 2025

Rafting & Kayaking

River Run Status Streamflow (CFS) Air Temp (F)
1st Gorge Lime
Class IV+ to V
39.99
Alpine Canyon (West Table to Sheep Gulch)
Class III- to III+
RUNNABLE 817 48
Astoria to West Table
Class I to II
RUNNABLE 817 48
Canyon
Class I
26 70
Cave Falls Run
Class III to III+
RUNNABLE 265 51
Granite Creek
Class II to III
TOO HIGH 66.6 46
Hoback Canyon
Class II to III+
38.43
Lower Greys (Squaw Creek to Bridge Campground)
Class III+ to V-
RUNNABLE 350 47
Narrows
Class III- to III+
RUNNABLE 890 44
Northgate Canyon
Class III- to III+
RUNNABLE 142 61
Upper Boxelder Canyon
Class V
RUNNABLE 215 74
Upper Greys (Lynx Creek to Little Greys)
Class II to IV+
RUNNABLE 350 47
Upper Greys (Murphy Creek Bridge to Lynx Creek Campground)
Class II to II+
RUNNABLE 350 47
Upper Greys (Murphy Creek Bridge to Lynx Creek Campground)
Class II to II+
RUNNABLE 350 47
Wedding of the waters
Class I
TOO HIGH 4350 89
       
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