Henry’s Fork, September 27th, 2022
Look for fishing to improve, especially because of BWO and mahogany dun activity later this week, as unsettled weather is in the forecast. Streamer fishing will be picking up almost everywhere along the river. Box Canyon, the lower river and the Tubs in particular, should be some of the best locations for trying streamers. Mid afternoons should offer the best fishing in response to terrestrial insect activity.
Headlines: from Dr. Rob Van Kirk’s Henry’s Fork drainage water status report from yesterday follow.
- Mean temperature was above average yet again yesterday; water-year precipitation is 92% of average and may end the water year there, given a good chance of showers later this week.
- Natural flow has dropped over the past day or two, while diversion has increased a little.
- Island Park Reservoir dropped by 35 ac-ft yesterday and is 45% full, compared with 46% on average. Current outflow is around 400 cfs and should stay there for the rest of the week.
- Water quality: Turbidity at Island Park Dam has been fluctuating 1-2 turbidity units on either side of average; turbidity is at or below average at all other locations.
Rob Van Kirk, Ph.D.
Senior Scientist
P.O. Box 550
Ashton, ID 83420
208-881-3407 CELL
208-652-3568 FAX