FLATHEAD - AT COLUMBIA FALLS
Forecasts For Water Year 2026
Official Water Supply
ESP with 10 days QPF
Ensemble: 2026-09-03 Issued: 2026-09-03
Forecast
Period		 Forecasts Are in KAF Obs Runoff
(2026-09-03)		 30 Year
Average
(1991-2020)
90 % 50 % %
Average		 10 %
OCT 92 200
NOV 321 269
DEC 929 193
JAN 410 168
FEB 222 162
MAR 782 280
APR 984 768
MAY 1891 1974
JUN 1457 1810
JUL 608 685
AUG 172 236
SEP 130 135 84 155 8.4* 160
Move the mouse over the desired "Forecast Table" to update graph.
* Partial Monthly Total
CSV
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FLATHEAD - AT COLUMBIA FALLS
Forecasts For Water Year 2026
Experimental Water Supply
HEFS with 15 days EQPF
Ensemble: 2026-09-03 Issued: 2026-09-03
Forecast
Period		 Forecasts Are in KAF Obs Runoff
(2026-09-03)		 30 Year
Average
(1991-2020)
90 % 50 % %
Average		 10 %
OCT 92 200
NOV 321 269
DEC 929 193
JAN 410 168
FEB 222 162
MAR 782 280
APR 984 768
MAY 1891 1974
JUN 1457 1810
JUL 608 685
AUG 172 236
SEP 125 142 88 217 8.4* 160
Move the mouse over the desired "Forecast Table" to update graph.
* Partial Monthly Total
CSV
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FLATHEAD - AT COLUMBIA FALLS
Forecasts For Water Year 2026
Reference
ESP with 0 days QPF
Ensemble: 2026-09-03 Issued: 2026-09-03
Forecast
Period		 Forecasts Are in KAF Obs Runoff
(2026-09-03)		 30 Year
Average
(1991-2020)
90 % 50 % %
Average		 10 %
OCT 92 200
NOV 321 269
DEC 929 193
JAN 410 168
FEB 222 162
MAR 782 280
APR 984 768
MAY 1891 1974
JUN 1457 1810
JUL 608 685
AUG 172 236
SEP 124 127 79 147 8.4* 160
Move the mouse over the desired "Forecast Table" to update graph.
* Partial Monthly Total
CSV
Download