Ok.... so I been fishin three different stretches of the OMR over the last week.
They all have different hatches. I don’t really know why you want a chronomids report for this stretch cause the fishies are up top hitting green drakes, small Caddis, caddis emergers... blue wing olives, or various Stimulators..... again this all depends on where you are on the OMR and what time of day.
The ONLY time I’ve used chronomids was early spring. And then it was on the spillway... size 18 black with silver flashabou ribbing... white bead head.
Now again, I wouldn’t use them unless it was like Feb or March right at the spillway or around Summerview.
These guys also work ok on the Crow at that time as well.
If your fishing now... the hatches are getting a better response from dem fishies now that there haven’t been earth shattering storms lately.
On the Lower OMR you can set your watch to some kind of small mayfly hatch happening around 9:30 AM to 11 ish ..... there could be a drake hatch as well... just watch the water.
The fish will turn on and tune in real quick. It’s been fun.
These hatches happen on the upper stretches as well... but times vary due to altitude and air temp.
Two nights ago we fished the upper OMR and stuff got crazy crazy fun in spite of high water flows from a storm around 7:40 PM. Huge cuties taking very small size 14-16 caddis... I got three for three on a size 14 sparse caddis with a yellow Antron body and Antron trailing tail....
And I got a real good couple pics too... and I’d post em too... but the fish nazis would start chirping again.....
One taped out to 17.5...
Anyways.... it’s that time of year now where both the Crow and the lower OMR have consistent evening free for all rise events. Fish till dark... haul in some nice fishies.
Try to figure out how to apply bug spray w/out getting any on your gear.... dem visa is savage this year.
Hope that helps and makes this thread more positive.