CHJW1 ESP Natural Volume Forecast - COLUMBIA

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COLUMBIA - CHIEF JOSEPH DAM (CHJW1) Forecasts for Water Year 2027
Natural Forecast ESP with 10 Days QPF Ensemble: 2026-10-28 Issued: 2026-10-28 Hide Forecast
Forecast Period	Forecasts Are in KAF				30 Year Average (1991-2020)
Forecast Period	90 %	50 %	% Average	10 %	30 Year Average (1991-2020)
APR-SEP	42912	53778	86	71240	62551
APR-JUL	33682	43330	82	55098	52569
APR-AUG	39292	49452	84	65802	58764
JAN-SEP	47769	60782	85	79379	71305
JAN-JUL	38925	49480	81	62551	61324
OCT-SEP	53443	66533	83	85612	80453
Experimental HEFS with 15 days EQPF Ensemble: 2026-10-28 Issued: 2026-10-28 Hide Forecast
APR-SEP	43687	54978	88	71487	62551
APR-JUL	33885	43575	83	55637	52569
APR-AUG	40360	50172	85	65543	58764
JAN-SEP	49096	61352	86	79331	71305
JAN-JUL	40090	50655	83	63508	61324
OCT-SEP	55041	68153	85	86775	80453
Reference ESP with 0 Days QPF Ensemble: 2026-10-28 Issued: 2026-10-28 Hide Forecast
APR-SEP	46023	56888	91	72705	62551
APR-JUL	36056	44822	85	56287	52569
APR-AUG	42516	52389	89	66985	58764
JAN-SEP	52098	63866	90	81146	71305
JAN-JUL	42606	52004	85	64262	61324
OCT-SEP	58488	70418	88	87894	80453
Move the mouse over the desired "Forecast Period" to display a graph.

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ESP10 HEFS ESP0

Data Files

/chpsesp/ensemble/natural/CHJW1N_SQIN.ESPF10.csv

CHJW1N_SQIN.ESPF0.csv|2026-10-28
CHJW1N_SQIN.ESPF10.csv|2026-10-28
CHJW1N_SQIN.ESPFM.csv|2026-10-28