Jerome County, ID — Agricultural Water Intelligence Brief

October 5, 2026 | Free-Tier Edition

Situation Summary

As the 2026 irrigation season winds toward close, North Side Canal Company deliveries are entering their final operational weeks, with late-October curtailment the expected seasonal transition for Jerome County's alfalfa and dairy support acres. For dairy operators, the more consequential question is carryover storage heading into 2027 — and that figure is not visible without current American Falls and Palisades reservoir data unavailable through standard public APIs. Reservoir storage data and 7-day forecast details are available in the full brief.

Snowpack Conditions

Lewis Lake Divide (SNOTEL #577, Teton County WY, 7,880 ft):

As of October 4, 2026, SWE reads 0.0 inches, snow depth 0.0 inches. No percent-of-median is shown, which indicates the historical median SWE for this calendar date is also 0.0 inches — this station is at its normal seasonal condition for early October. This is not a below-normal reading for today's date.

The operative 2026 snowpack story is timing, not current depth: Lewis Lake Divide melted out 4–6 weeks ahead of the historical median meltout date due to an anomalous March heat wave. That early meltout accelerated inflow into Jackson Lake and Palisades Reservoir well ahead of schedule — with downstream consequences for American Falls storage and the summer delivery profile that Jerome County irrigators experienced through July–September.

New snowpack accumulation at this elevation typically resumes in November. The 2026–27 snowpack season is effectively not yet open.

Streamflow Conditions

No active USGS streamflow gauges within Jerome County boundaries provide agricultural supply data. Jerome County's water supply monitoring depends on two Snake River gauges located outside the county:

No current gauge readings were provided in this brief cycle. Jerome County agricultural users should contact North Side Canal Company directly for current delivery status and anticipated end-of-season curtailment dates.

Seasonal Guidance

Subscribe for the full brief including reservoir storage, weather forecasts, depletion analysis, and detailed operational recommendations.

Data Sources: SNOTEL data through October 4, 2026; USGS streamflow data through October 5, 2026.

Data Current As Of: October 5, 2026.

Important Disclaimers: This brief provides automated analysis for informational purposes only. Specific numerical claims have not been independently verified. Consult official sources including Idaho Department of Water Resources (IDWR — administers Water District 36, middle Snake River priority system; Eastern Regional Office, Pocatello, (208) 525-7161), Northside Canal Company (primary north-bank diverter at Milner Dam, serving approximately 85,000 acres across Jerome, Lincoln, and adjacent counties), A&B Irrigation District (USBR Bureau of Reclamation project serving portions of Jerome and Lincoln counties), and U.S. Bureau of Reclamation Pacific Northwest Region (Boise office) for American Falls and Palisades upstream reservoir storage context and operational status before making irrigation or herd management decisions.