Idaho Department of Water Resources

Idaho Department of Water Resources

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Contact information, map and directions, contact form, opening hours, services, ratings, photos, videos and announcements from Idaho Department of Water Resources, Government Organization, 322 E. Front Street Suite 648, Boise, ID.

Photos from My Place Preschool 's post 05/20/2026
05/15/2026
04/30/2026

Water supply update on the Henry's Fork Basin!

🎣Current Conditions as of 4/24/26🎣

🌧️ A boost from recent storms. Moderate to heavy precipitation pushed water-year totals up to 98% of average, with April trending wetter than March.

❄️ Snowpack saw a short-term rebound. New snow increased SWE to 81% of peak, though still well below typical for this time of year and among the lowest on record for the date.

🌡️ Cooler now, warming ahead. Temperatures dropped below average yesterday but are expected to return to near- to above-average levels with lighter precipitation into next week.

🌊 Flows improving—but still below normal. Natural flow increased with recent rain and snowmelt but remains around 75% of average, while diversion continues running well above normal for the date.

💧 Reservoirs remain in strong shape. Island Park Reservoir is now 95% full (89% average), though gains are expected to slow without additional precipitation. System-wide storage is near average after recent declines.

🎣 Water quality remains favorable. Cooler temperatures have helped slow hatch timing slightly, while turbidity remains below average despite minor increases from recent runoff.

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322 E. Front Street Suite 648
Boise, ID
83702