IDAHO FLOW REPORT

Last Updated: December 29, 2025

Idaho's river conditions exhibit diverse streamflow trends, with some rivers experiencing flow significantly above or below normal. The Kootenai River at Porthill boasts a robust current streamflow of 27,100 cubic feet per second (cfs), which is 53.95% above normal, possibly impacting the communities near Bonners Ferry and indicating a heightened risk of flooding. Outdoor enthusiasts should be wary of fluctuating conditions, particularly on popular whitewater trails such as the ones near the Salmon and Payette rivers. Conversely, the Henrys Fork near Island Park and the Snake River near Neeley showcase lower than average flows at 203 cfs and 281 cfs, respectively, indicating potential flow droughts that could affect both recreational activities and local ecosystems.

Particularly noteworthy is the Boundary Creek near Porthill, with a flow 165.07% above normal although the actual flow is moderate at 256 cfs, hinting at exceptional conditions for kayakers and anglers but also a need for vigilance. The South Fork of the Coeur d'Alene River at Elizabeth Park is flowing at a considerable 625 cfs, which is 203.86% of its normal flow, potentially impacting the Pinehurst area. Such anomalies underscore the importance of monitoring streamflow changes for both safety and environmental management. It's critical for river users and residents in Idaho's river basins to stay updated on current conditions as these can be precursors to environmental events such as flooding or drought, which may demand preparedness and caution.

       



Idaho's flow conditions are influenced by its unique hydrology and climate characteristics. The state has numerous major surface flows, including the Snake River, Salmon River, and Clearwater River, all of which are important for irrigation, hydroelectric power, and recreation. Idaho also has several large reservoirs and dams, such as the Boise River Reservoir and Lucky Peak Dam, which play a crucial role in regulating water flow and supply. The state's watersheds and snowpack levels are also significant indicators of hydrologic conditions, with winter snowpack providing a critical source of water for the state's rivers and streams during the summer months. Overall, Idaho's flow conditions are shaped by a complex interplay of natural and human factors, making it an important area of study for hydrologists and water resource managers.


       

Winter Storm Warnings

December 29 2025

Residents of south central and southwest Idaho are advised to prepare for an Air Stagnation Advisory in effect until January 1 at 10:00 AM MST. This prolonged period of stagnant air is characterized by light winds and minimal vertical mixing due to a surface inversion trapping pollutants, leading to potentially hazardous air quality. Those with respiratory issues should take extra precautions. It's critical to reduce outdoor activities that contribute to the air pollution and stay informed about the air quality in major affected areas, including Boise and surrounding communities.


Rafting & Kayaking

River Run Status Streamflow (CFS) Air Temp (F)
32nd Street to Smelter
Class III to IV-
34.11
Black Canyon - Highway 34 to Grace Powerhouse
Class IV to V
TOO HIGH 1630 59
Blackfoot Wolverine Canyon Run
Class IV+ to V
RUNNABLE 144 56
Boundary Creek to Cache Bar
Class III to IV+
RUNNABLE 3670 48
Boundary Creek to Cache Bar
Class III to IV+
RUNNABLE 3670 48
Boundary Creek to Cache Bar
Class III to IV+
RUNNABLE 3670 48
Boundary Creek to Cache Bar
Class III to IV+
RUNNABLE 3670 48
Boundary Creek to Cache Bar
Class III to IV+
RUNNABLE 3670 48
Box Canyon
Class II
RUNNABLE 267 50
Bruneau (Indian Hot Springs to Bruneau)
Class II+ to IV
RUNNABLE 1270 53
Cabarton
Class II to III
TOO LOW 44.6 35
Challis Bridge to Deer Gulch
Class II
RUNNABLE 1070 55
Coffee Pot
Class III
RUNNABLE 390 48
Colston to the Town of Salmon
Class II to II+
TOO HIGH 1070 55
Corn Creek to Vinegar Creek/Carey Creek (Main Salmon)
Class III to IV
RUNNABLE 1560 54
Corn Creek to Vinegar Creek/Carey Creek (Main Salmon)
Class III to IV
RUNNABLE 1560 54
Corn Creek to Vinegar Creek/Carey Creek (Main Salmon)
Class III to IV
RUNNABLE 1560 54
East Fork to Challis Bridge
Class II
RUNNABLE 1070 55
Fish Creek to Split Creek
Class III to IV
RUNNABLE 2490 58
Float Creek to Middle Fork of the Salmon
Class IV
35.94
Hammer Creek to Heller Bar (Lower Salmon)
Class III- to IV
TOO LOW 527 58
Headwaters (Gold Creek to Stanley)
Class III- to III+
TOO HIGH 1070 55
Hells Canyon (Hells Canyon Dam to Pittsburg Landing)
Class III to IV
RUNNABLE 9860 51
Kelly's Whitewater Park
Class III
216 45
Murphy to Bruneau
Class III- to V
TOO LOW 20 57
Murphy to Bruneau
Class III- to V
TOO LOW 20 57
Murphy to Bruneau
Class III- to V
TOO LOW 20 57
Murtaugh Canyon
Class IV
TOO LOW 57
Pahsimeroi to Royal Gorge
Class II- to III-
TOO HIGH 1070 55
Palisade Dam to Lorenzo (South Fork)
Class II
RUNNABLE 3090 45
Paradise to Selway Falls
Class IV- to V
42.37
Piece of Cake Run (Sunbeam to Torreys)
Class III to IV
35.55
Pittsburg Landing to Heller Bar
Class II to III
RUNNABLE 9860 51
Salmon to North Fork
Class II
TOO HIGH 1070 55
Secesh to Main (The Canyon)
Class III to V
418 49
Split Creek to Lowell
Class II+ to III+
RUNNABLE 2490 58
Sunbeam Run (Stanley to Sunbeam Dam)
Class III- to III+
TOO HIGH 1070 55
Torreys to East Fork
Class II
RUNNABLE 1070 55
White Pine (Indian Grave Creek) to Wilderness Gateway Bridge
Class IV- to IV+
RUNNABLE 2490 58
White Sands to White Pine (Indian Grave Creek)
Class II to III
42.12
       
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