This may be near a record low flow for the middle Skagit River, and it's likely the lowest levels the Baker reservoirs have ever been at. They simply ran out of water; that is why the Skagit is now so low.
The present impact is that nearly half of the chinook and many more chum salmon fry in the middle river section of the Skagit just got dewatered before they could emerge from the gravel. Looking for an upside, the Skagit had a pretty good chinook escapement last fall, and there was no flood damage to spawning redds this winter, so survival overall was pretty good. Hope it was high enough to offset this loss. Probably not so good for the chums, tho. Chum escapement was one of the lowest ever, so this loss hits them pretty hard.
Additionally, rearing flows for juvenile rearing and migration this spring are nearly non-existent. This will reduce the number of smolts that successfully reach the Bay.
Importantly, the Baker reservoirs are now storing what little water is flowing in. Puget Sound Energy has said that Lake Shannon will have enough refill by late June to help the adult sockeye salmon run enter the river and fish ladder and trap system.
Both Puget and Seattle City Light will store as much water as possible this spring and summer - so low river flows - to best manage the next spawning and incubation cycle beginning in late August on the upper Skagit River. So even tho the weather service is not predicting drought, it's nice to know that the utilities are cooperating and planning contingincy action in case the dry weather continues into the summer and fall.
It's not a good situation for fish, but I thought you would like to know plans are already being made to make the best of it.
Sincerely,
Salmo g.