Henry’s Fork, October 31st, 2023

Headlines from Dr..Rob Van Kirk’s Henry’s Fork Drainage Water Status Report Filed October 30th, 2023

• Last week was cold and wet, moving water-year total precipitation up to 153% of average and commencing mountain snow pack accumulation.
• Although temperatures are expected to climb back above average, an extended period of very wet weather is expected to begin later this week.
• Natural flow has dropped from its rain-driven peak on Friday and is 98% of average.
• At an average outflow of 205 cfs, Island Park Reservoir gained 435 ac-ft/day over the weekend and is 76% full, compared to 54% full on average.

Rob Van Kirk, PhD.

Senior Scientist

Henry’s Fork Foundation

P.O. Box 550

Ashton, ID 83420

208-881-3407 CELL

Except for midge and BWO activity, say goodbye to reasons for top water fly fishing, but use their life cycle patterns. Concentrate on offering nymph and streamer patterns anywhere on the river for the next several months. Daytime fishing will improve with minimal ice in the guides compared to during frosty early AMs and evenings. As snow accumulates, expect diminishing access throughout the river. Happy Halloween!