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South Fork

Jimmy's All Seasons Angler / South Fork (Page 25)

South Fork 6-22-19

Here is some useful technical information on the South Fork from Bryce Oldenmeyer of the Henry’s Fork Foundation.

Flow update: In response to cooling temperatures and decreased inflow, discharge from Palisades Dam was decreased 2,400 cfs this (Friday, 6/21) afternoon. Current outflow from Palisades Dam is 11,400 cfs. Flows are expected to stay around this level for the next 7 to 10 days.

 

Snow and reservoir overview

Average temperatures the last seven days have melted most of the snow at sites above Palisades Reservoir. Out of the eighteen SNOTEL sites above Palisades Reservoir, Togwotee Pass (elevation 9580 ft) and Two Ocean Plateau (elevation 9240 ft) are the only SNOTEL sites with snow. Togwotee Pass has 8.1 inches SWE (92% of median for the date; 32% of peak) and Two Oceans Plateau has 7.8 inches of SWE (66% of median for the date; 26% of peak SWE). Cooler temperatures are forecast for the next 3-4 days and runoff is anticipated to slow over the weekend. Even after temperatures are expected to return to average next week, it is likely that runoff will continue to decline as the remaining snow proceeds to melt.

The Upper Snake River system is currently 96% of capacity and expected to fill by the end of the month. Palisades Reservoir is 95% full (1,139,623 ac-ft of 1,200,000 ac-ft) and Jackson Lake is 97% full (822,279 ac-ft of 847,000 ac-ft).

With respect to fly-fishing, giant stoneflies are beginning to emerge along the river below Lorenzo. With warming weather they will soon advance up the river and become numerous enough to interest resident trout.

 

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South Fork 6-18-19

Palisades Reservoir is at 85% of capacity.   With plenty of snow remaining in the mountains above, full capacity is not far away.  How this impacts flows in the river will be set by the Bureau of Reclamation, but we will report here on what happens.

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South Fork 6-15-19

Over the past few days the flow out of Palisades Dam has been raised to current 13700 cfs   (14200 cfs at Heise, 6900 cfs at Lorenzo) which is almost normal flow for this date.  Palisades Reservoir is at 85% of capacity, and a ton of snow remains in the mountains above it. So expect more flow increases to come.  Meanwhile, stay with the fly pattern strategy we have suggested in recent fishing reports.

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South Fork 6-11-19

Flow out of Palisades Dam was raised to 11700 cfs yesterday ( now 12500 cfs at Heise, 4950 cfs at Lorenzo). This brings flow in the river to near normal for this time of the season.  Use same strategy as we suggested in last report: streamer patterns or rubber legs with San Juan worm or small bead head dropper.  You will see A LOT fewer anglers on the river compared to the crowds on the Henry’s Fork.

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South Fork 6-8-19

Flow out of Palisades Dam is about 8900 cfs  (10200 cfs at Heise,  3340 cfs at Lorenzo)  and looks to be at that level for a while. Palisades Reservoir is about 65% full. Compared to the fishing pressure currently on the Henry’s Fork, there is very little here, and fishing is quite good up and down the river.    Streamers work well when presented over drop-offs.  Rubber legs seem to bring the most action and do even better when trailed by a San Juan Worm or small bead head nymph.  No really good top water action yet, but a few riffles do have some BWO activity.

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South Fork 5-14-19

Not much change here. Palisades Reservoir is about half full. Flow out of Palisades Dam is staying constant (for now) at around 11900 cfs  Flow is 13000 cfs at Heise, and less on the river below Heise (6700 cfs at Lorenzo) because of irrigation and stock watering demands.  Some BWOs emerging, but best fishing results currently come from using rubber leg, San Juan worm and streamer patterns.

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South Fork 5-11-2019

Flow out of Palisades has been stable for several days at 11800 cfs  (12600 cfs at Heise). That’s just about the normal for this time of year.  River is not yet very clear.  Might be from tributary run-off. Rubber Legs, San Juan Worm, and streamer patterns still working best.  BWOs are out, and some fish are on them.

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South Fork 5-7-19

Flow out of Palisades Dam was cut to 11800 cfs ( now 13000 cfs at Heise) yesterday to meet flood control protocol.  It’s also a good flow for bringing on fly-fishing success.  All that’s needed now is for water to warm up a bit to bring on more aquatic insect activity.  So for now continue presenting  big rubber leg,  small bead head nymph around riffles, and streamer patterns.

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