Henry’s Fork, January 6th, 2024

Details From Dr. Rob Van Kirk’s Henry’s Fork Drainage Snow-Water Equivalent Report Filed Yesterday

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• Light precipitation yesterday kept the water-year total at 80% of average and SWE at 57% of average.
• Precipitation is expected to continue for at least the next 10 days.
• At an outflow of 366 cfs, Island Park Reservoir gained 83 ac-ft yesterday and is 89% full, compared with 71% full on average.

Details are given below to reveal some concern for below normal amounts of snow throughout in the drainage so far this winter.

Unfortunately, no appreciable precipitation is indicated for at least the next week. Some very light precipitation is possible late next week, with high uncertainty in forecasts and outlooks beyond that. The general trend is still toward moderate to heavy precipitation to our south and dry conditions from here northward. Temperatures are expected to be above average, although inversions are keeping temperatures in the valleys a little lower than had been anticipated a few days ago.

Rob Van Kirk, Ph.D.

Senior Scientist

Henry’s Fork Foundation

P.O. Box 550

Ashton, ID 83420

208-881-3407 CELL

208-652-3568 FAX

[email protected]