Henrys Fork

Flow now

Henrys Fork Nr Ashton ID, 2 mi from the river.

581cfsat build, Nov 12, 11 AM MT

The typical week here, from 10 years of record: 771 cfs to 1,070 cfs, around 910 cfs.

Also gauged at Fall River Nr Chester ID: 440 cfs, Nov 12.

Snowpack

0.1 in of water in the snow at Island Park and 2 more stations, against a median 1.9 in for the date (4 % of normal).

The snowpack here usually builds from Nov 4, peaks Mar 27 and is gone by May 9; runoff follows the melt.

The season, November

Usually workable this week. Pick your window and fish it well.

• Midgessizes 18 to 22
• Small eggs and worms
• Pheasant tail and zebra midge nymphsunder an indicator

Typical for the week over 10 years: 771 to 1,070 cfs. Running 581 cfs today, below that range. Flows are not forecast; check the gauge the day before.

Brown Trout are spawning (October to December). Stay off clean, light-coloured gravel in riffle tails and pool tailouts, and leave paired fish alone.

Brook Trout are spawning (September to November). Stay off clean, light-coloured gravel in riffle tails and pool tailouts, and leave paired fish alone.

Mountain Whitefish are spawning (October to December). The egg bite behind spawning whitefish is the best winter nymphing of the year: an egg pattern below the riffles.

• Egg patterns in the runs below the spawning gravel, never on it.

Written by the app's rules engine from the calendar, the gauge record and the snowpack, not by hand, so it says only what the data says. The weather for the week comes with the app.

Nearby waters

• Teton River14 mi
• Island Park Reservoir23 mi
• South Fork Snake River43 mi

Every Idaho water