Idaho SNOTEL Precipitation Summary Update Report

Idaho SNOTEL Precipitation Summary Update Report

Based on Mountain Data from NRCS SNOTEL Sites

**Provisional data, subject to revision**

Data based on the first reading of the day (typically 00:00) for Wednesday, August 20, 2025

Basin Site Name	Elev (ft)
Basin Site Name	Elev (ft)	Month to Date Precipitation (in)	Median Monthly Total (in)	Pct of Monthly Total	Water Year to Date Precipitation (in)	Median Annual Total (in)	Pct of Annual Total
NORTHERN PANHANDLE REGION
Bear Mountain	5460	0.9	0.8	112	69.3	93.0	75
Bunchgrass Mdw	5020	1.1	1.0	110	42.7	54.4	78
Garver Creek	4250	1.2	0.8₍₂₄₎	150	24.0	27.3₍₂₄₎	88
Hawkins Lake	6460	1.2	1.4	86	44.1	47.1	94
Hidden Lake	5000	1.4	1.6₍₂₀₎	88	57.2	76.0₍₂₀₎	75
Mosquito Ridge	5270	0.5	0.8	62	43.0	57.9	74
Moyie Mountain	6037	-M	N/A	*	-M	N/A	*
Myrtle Creek	3540	0.2	0.5₍₁₇₎	40	25.0	29.9₍₁₇₎	84
Quartz Peak	4710	0.0	0.9	0	41.9	48.2	87
Schweitzer Basin	6090	0.5	1.2	42	47.9	54.2	88
Basin Index (%)		78			81
COEUR D'ALENE-ST. JOE RIVER BASIN
Humboldt Gulch	4260	0.1	0.9	11	34.1	52.2	65
Lookout	5180	0.6	0.7	86	34.7	49.2	71
Lost Lake	6090	3.3	1.0	330	63.7	77.9	82
Mica Creek	4480	0.8	1.0	80	41.7	55.6	75
Mosquito Ridge	5270	0.5	0.8	62	43.0	57.9	74
Sherwin	3190	0.6	0.5₍₂₉₎	120	28.9	38.6₍₂₉₎	75
Sunset	5580	0.6	1.0	60	32.7	51.6	63
Basin Index (%)		110			73
CLEARWATER BASIN
Cool Creek	6310	0.9	1.0	90	56.0	69.5	81
Crater Meadows	5960	0.7	1.1	64	58.8	73.0	81
Elk Butte	5680	0.7	0.8	88	40.1	56.4	71
Hemlock Butte	5800	0.3	N/A	*	42.8	N/A	*
Hoodoo Basin	6060	2.3	1.1	209	53.2	62.4	85
Lolo Pass	5280	0.6	1.4	43	37.6	47.6	79
Lost Lake	6090	3.3	1.0	330	63.7	77.9	82
Moscow Mountain	4700	0.5	0.7₍₂₀₎	71	36.0	44.4₍₂₀₎	81
Mountain Meadows	6340	0.9	1.0	90	39.8	45.0	88
Nez Perce Camp	5670	0.7	0.9	78	25.5	32.6	78
Pierce R.S.	3080	0.3	1.1₍₁₁₎	27	33.3	43.5₍₁₁₎	77
Savage Pass	6170	0.5	1.4	36	35.4	46.8	76
Shanghi Summit	4590	0.2	0.9	22	42.8	57.2	75
Sherwin	3190	0.6	0.5₍₂₉₎	120	28.9	38.6₍₂₉₎	75
Twelvemile Creek	5530	1.6	1.0	160	40.4	48.2	84
Twin Lakes	6390	1.1	1.2	92	55.1	66.0	83
Basin Index (%)		99			80
SALMON BASIN
Banner Summit	7040	-0.1	0.4	-25	36.5	41.8	87
Bear Basin	5350	0.1	0.5	20	32.5	35.7	91
Big Creek Summit	6560	0.4	0.4	100	39.1	45.8	85
Brundage Reservoir	6280	0.2	0.6	33	47.1	52.0	91
Deadwood Summit	6990	0.3	0.5	60	51.8	54.6	95
Galena	7470	0.1	0.3	33	22.7	25.8	88
Galena Summit	8780	0.1	0.4	25	26.4	28.7	92
Lemhi Ridge	8080	0.1	0.8	12	19.9	25.1	79
Meadow Lake	9190	0.4	1.0	40	24.7	31.0	80
Mill Creek Summit	8790	0.1	0.6	17	24.7	28.2	88
Moonshine	7490	0.4	0.8	50	17.0	21.4	79
Moose Creek	6170	1.1	0.9	122	24.9	30.6	81
Morgan Creek	7620	0.4	0.4	100	20.6	23.2	89
Mountain Meadows	6340	0.9	1.0	90	39.8	45.0	88
Saddle Mtn.	7890	1.1	0.8	138	25.7	35.3	73
Schwartz Lake	8620	0.8	0.9₍₂₅₎	89	21.3	26.3₍₂₅₎	81
Secesh Summit	6520	0.5	0.5	100	47.0	40.3	117
Puhi Flat	6240	0.3	0.4	75	41.4	43.7	95
Vienna Mine	8930	0.1	0.6	17	37.0	42.0	88
West Branch	5590	0.1	0.5	20	41.4	41.6	100
Basin Index (%)		60			89
WEISER BASIN
Bear Saddle	6170	0.3	0.3	100	34.3	33.6	102
Puhi Flat	6240	0.3	0.4	75	41.4	43.7	95
Van Wyck	4960	-M	0.2₍₁₉₎	*	-M	25.3₍₁₉₎	*
West Branch	5590	0.1	0.5	20	41.4	41.6	100
Basin Index (%)		58			98
PAYETTE BASIN
Banner Summit	7040	-0.1	0.4	-25	36.5	41.8	87
Bear Basin	5350	0.1	0.5	20	32.5	35.7	91
Big Creek Summit	6560	0.4	0.4	100	39.1	45.8	85
Bogus Basin	6370	0.0	0.2₍₂₁₎	0	34.3	29.6₍₂₁₎	116
Brundage Reservoir	6280	0.2	0.6	33	47.1	52.0	91
Cozy Cove	5410	-M	0.3	*	-M	31.8	*
Deadwood Summit	6990	0.3	0.5	60	51.8	54.6	95
Jackson Peak	7060	0.0	0.4	0	42.0	44.6	94
Long Valley	4890	0.2	0.2₍₁₉₎	100	23.5	24.0₍₁₉₎	98
Secesh Summit	6520	0.5	0.5	100	47.0	40.3	117
Puhi Flat	6240	0.3	0.4	75	41.4	43.7	95
Van Wyck	4960	-M	0.2₍₁₉₎	*	-M	25.3₍₁₉₎	*
Basin Index (%)		46			96
BOISE BASIN
Atlanta Summit	7570	0.0	0.3	0	37.5	43.1	87
Bogus Basin	6370	0.0	0.2₍₂₁₎	0	34.3	29.6₍₂₁₎	116
Camas Creek Divide	5720	-0.1	0.1₍₂₈₎	-100	21.8	23.0₍₂₈₎	95
Couch Summit	6770	0.0	N/A	*	22.0	N/A	*
Dollarhide Summit	8390	-0.1	0.3	-33	21.9	33.0	66
Graham Guard Sta.	5680	0.0	0.3	0	28.2	29.6	95
Jackson Peak	7060	0.0	0.4	0	42.0	44.6	94
Mores Creek Summit	6090	0.0	0.2	0	44.2	44.4	100
Prairie	4800	0.0	0.0	*	21.2	21.2	100
Trinity Mtn.	7790	0.0	0.2	0	43.4	46.1	94
Vienna Mine	8930	0.1	0.6	17	37.0	42.0	88
Basin Index (%)		-4			93
BIG WOOD BASIN
Camas Creek Divide	5720	-0.1	0.1₍₂₈₎	-100	21.8	23.0₍₂₈₎	95
Chocolate Gulch	6310	0.1	0.5₍₂₇₎	20	16.7	22.0₍₂₇₎	76
Couch Summit	6770	0.0	N/A	*	22.0	N/A	*
Dollarhide Summit	8390	-0.1	0.3	-33	21.9	33.0	66
Galena	7470	0.1	0.3	33	22.7	25.8	88
Galena Summit	8780	0.1	0.4	25	26.4	28.7	92
Hyndman	7590	0.0	0.6	0	17.1	24.9	69
Lost-Wood Divide	7870	0.2	0.8	25	23.1	28.1	82
Soldier R.S.	5780	-0.2	0.1	-200	18.6	22.5	83
Basin Index (%)		3			81
LITTLE WOOD BASIN
Bear Canyon	7920	-0.1	0.8	-12	20.0	26.6	75
Fish Ck	6380	-0.2	N/A	*	16.6	N/A	*
Garfield R.S.	6580	-0.7	0.4	-175	12.2	19.6	62
Smiley Mountain	9540	0.1	0.7₍₁₉₎	14	22.5	31.2₍₁₉₎	72
Swede Peak	7640	-0.1	0.4	-25	17.0	24.8	69
Basin Index (%)		-35			70
BIG LOST BASIN
Bear Canyon	7920	-0.1	0.8	-12	20.0	26.6	75
Hilts Creek	8090	0.2	1.2	17	16.3	21.8	75
Lost-Wood Divide	7870	0.2	0.8	25	23.1	28.1	82
Smiley Mountain	9540	0.1	0.7₍₁₉₎	14	22.5	31.2₍₁₉₎	72
Stickney Mill	7440	0.0	0.6	0	14.0	18.8	74
Basin Index (%)		10			76
LITTLE LOST
Hilts Creek	8090	0.2	1.2	17	16.3	21.8	75
Meadow Lake	9190	0.4	1.0	40	24.7	31.0	80
Moonshine	7490	0.4	0.8	50	17.0	21.4	79
Basin Index (%)		33			78
BIRCH, MEDICINE LODGE, BEAVER, CAMAS BASINS
Beagle Springs	8880	0.4	1.4	29	18.4	23.2	79
Crab Creek	6870	0.0	0.8	0	17.3	26.3	66
Lakeview Ridge	7340	0.4	1.0	40	18.1	26.8	68
Meadow Lake	9190	0.4	1.0	40	24.7	31.0	80
Basin Index (%)		29			73
HENRYS FORK, TETON BASINS
Black Bear	8160	0.6	1.0	60	43.4	54.0	80
Grand Targhee	9260	0.1	1.4₍₁₄₎	7	38.6	50.6₍₁₄₎	76
Grassy Lake	7330	0.1	1.4	7	41.4	50.8	81
Island Park	6300	0.4	0.8	50	22.2	28.0	79
Lewis Lake Divide	7880	0.1	1.2	8	41.8	48.6	86
Phillips Bench	8160	0.3	1.3	23	34.3	40.9	84
Pine Creek Pass	6710	0.4	1.6	25	29.7	33.3	89
White Elephant	7670	0.3	1.2	25	33.0	44.6	74
Basin Index (%)		23			81
SNAKE BASIN ABOVE PALISADES
Base Camp	7040	0.0	1.0	0	26.5	32.8	81
Blind Bull Sum	8880	0.1	1.0	10	22.7	29.2	78
Cottonwood Creek	7710	0.0	1.4	0	34.5	39.6	87
East Rim Divide	8010	0.2	1.0	20	16.6	19.3	86
Granite Creek	6770	0.0	1.0	0	22.9	30.6	75
Grassy Lake	7330	0.1	1.4	7	41.4	50.8	81
Gros Ventre Summit	8760	15.0	1.1	1364	32.5	22.6	144
Gunsight Pass	9830	0.3	1.2₍₂₂₎	25	19.4	25.0₍₂₂₎	78
Lewis Lake Divide	7880	0.1	1.2	8	41.8	48.6	86
Loomis Park	8240	0.4	1.1	36	22.2	27.8	80
Phillips Bench	8160	0.3	1.3	23	34.3	40.9	84
Salt River Summit	7630	0.0	1.0	0	16.7	26.2	64
Snake River Station	6900	0.3	1.2	25	27.8	34.5	81
Somsen Ranch	6830	0.0	1.4	0	20.2	26.6	76
Spring Creek Divide	9020	-M	1.2	*	-M	35.8	*
Thumb Divide	7970	-M	1.1	*	-M	29.4	*
Togwotee Pass	9590	2.5	1.0	250	34.6	38.2	91
Triple Peak	8520	0.7	1.5	47	33.3	39.4	85
Two Ocean Plateau	9240	0.5	1.4	36	34.0	41.4	82
Willow Creek	8060	0.1	1.5	7	45.5	52.2	87
Younts Peak	8340	0.3	1.4₍₂₈₎	21	20.3	28.0₍₂₈₎	72
Basin Index (%)		90			84
WILLOW, BLACKFOOT, PORTNEUF BASINS
Oxford Spring	6790	-0.2	0.8	-25	20.2	27.2	74
Pebble Creek	6520	0.6	N/A	*	28.2	N/A	*
Sedgwick Peak	7800	0.0	1.2	0	27.0	32.2	84
Sheep Mtn.	6630	0.2	0.8	25	19.3	25.5	76
Slug Creek Divide	7240	-0.1	1.1	-9	27.8	33.3	83
Somsen Ranch	6830	0.0	1.4	0	20.2	26.6	76
Wildhorse Divide	6480	0.4	0.7	57	29.0	28.8	101
Basin Index (%)		5			83
SNAKE BASIN ABOVE AMERICAN FALLS
Base Camp	7040	0.0	1.0	0	26.5	32.8	81
Black Bear	8160	0.6	1.0	60	43.4	54.0	80
Blind Bull Sum	8880	0.1	1.0	10	22.7	29.2	78
Cottonwood Creek	7710	0.0	1.4	0	34.5	39.6	87
East Rim Divide	8010	0.2	1.0	20	16.6	19.3	86
Grand Targhee	9260	0.1	1.4₍₁₄₎	7	38.6	50.6₍₁₄₎	76
Granite Creek	6770	0.0	1.0	0	22.9	30.6	75
Grassy Lake	7330	0.1	1.4	7	41.4	50.8	81
Gros Ventre Summit	8760	15.0	1.1	1364	32.5	22.6	144
Gunsight Pass	9830	0.3	1.2₍₂₂₎	25	19.4	25.0₍₂₂₎	78
Island Park	6300	0.4	0.8	50	22.2	28.0	79
Lewis Lake Divide	7880	0.1	1.2	8	41.8	48.6	86
Loomis Park	8240	0.4	1.1	36	22.2	27.8	80
Oxford Spring	6790	-0.2	0.8	-25	20.2	27.2	74
Phillips Bench	8160	0.3	1.3	23	34.3	40.9	84
Pine Creek Pass	6710	0.4	1.6	25	29.7	33.3	89
Salt River Summit	7630	0.0	1.0	0	16.7	26.2	64
Sedgwick Peak	7800	0.0	1.2	0	27.0	32.2	84
Sheep Mtn.	6630	0.2	0.8	25	19.3	25.5	76
Slug Creek Divide	7240	-0.1	1.1	-9	27.8	33.3	83
Snake River Station	6900	0.3	1.2	25	27.8	34.5	81
Somsen Ranch	6830	0.0	1.4	0	20.2	26.6	76
Spring Creek Divide	9020	-M	1.2	*	-M	35.8	*
Thumb Divide	7970	-M	1.1	*	-M	29.4	*
Togwotee Pass	9590	2.5	1.0	250	34.6	38.2	91
Two Ocean Plateau	9240	0.5	1.4	36	34.0	41.4	82
White Elephant	7670	0.3	1.2	25	33.0	44.6	74
Wildhorse Divide	6480	0.4	0.7	57	29.0	28.8	101
Willow Creek	8060	0.1	1.5	7	45.5	52.2	87
Basin Index (%)		71			83
RAFT BASIN
George Creek	8960	0.5	1.5₍₁₀₎	33	23.8	33.4₍₁₀₎	71
Howell Canyon	8010	0.2	1.2₍₂₉₎	17	33.6	40.1₍₂₉₎	84
Basin Index (%)		26			78
GOOSE CREEK BASIN
Bostetter R.S.	7530	0.0	0.6	0	23.7	28.1	84
Magic Mountain	6940	0.1	0.6	17	25.5	32.6	78
Basin Index (%)		8			81
SALMON FALLS BASIN
Bostetter R.S.	7530	0.0	0.6	0	23.7	28.1	84
Jakes Creek	7380	0.0	N/A	*	17.9	N/A	*
Magic Mountain	6940	0.1	0.6	17	25.5	32.6	78
ONeil Creek	6490	0.1	N/A	*	11.0	N/A	*
Pole Creek R.S.	8360	0.1	0.6	17	17.2	20.9	82
Wilson Creek	7110	0.1	0.5	20	21.9	27.7	79
Basin Index (%)		13			81
BRUNEAU BASIN
Bear Creek	8090	-0.2	0.7	-29	29.1	33.8	86
Big Bend	6890	0.0	0.4	0	14.5	17.2	84
Merritt Mountain	6920	0.4	N/A	*	14.5	N/A	*
ONeil Creek	6490	0.1	N/A	*	11.0	N/A	*
Pole Creek R.S.	8360	0.1	0.6	17	17.2	20.9	82
Seventysix Creek	7360	-0.1	0.4	-25	17.8	21.6	82
Stag Mountain	7640	-0.1	N/A	*	9.2	N/A	*
Wilson Creek	7110	0.1	0.5	20	21.9	27.7	79
Basin Index (%)		-4			83
OWYHEE BASIN
Big Bend	6890	0.0	0.4	0	14.5	17.2	84
Columbia Basin	6480	-0.1	N/A	*	20.6	N/A	*
Fawn Creek	7040	0.0	0.2	0	25.4	32.1	79
Fry Canyon	6790	-0.2	N/A	*	19.9	N/A	*
Jack Creek Upper	7380	-0.2	0.4	-50	22.6	27.4	82
Jacks Peak	8440	0.1	0.3	33	27.9	33.2	84
Laurel Draw	6680	-0.1	0.2	-50	23.3	25.8	90
Merritt Mountain	6920	0.4	N/A	*	14.5	N/A	*
Mud Flat	5750	0.3	0.2	150	15.9	16.3	98
South Mtn.	6650	0.0	0.4	0	33.7	31.8	106
Taylor Canyon	6320	-0.1	0.2	-50	9.2	13.2	70
Toe Jam	7700	-0.1	0.2₍₁₁₎	-50	23.8	25.6₍₁₁₎	93
Basin Index (%)		-4			88
BEAR RIVER BASIN
Bear River RS	8510	0.0	1.1₍₁₀₎	0	14.8	23.0₍₁₀₎	64
Bug Lake	7980	0.0	1.1	0	22.3	27.8	80
Burts Miller Ranch	7900	0.1	0.8₍₁₁₎	12	14.6	13.3₍₁₁₎	110
Chalk Creek #1	9160	0.0	1.8	0	27.2	37.2	73
Emigrant Summit	7390	0.0	0.9	0	31.6	38.2	83
Franklin Basin	8140	0.0	0.8	0	35.7	42.4	84
Garden City Summit	7680	-0.1	0.6₍₁₁₎	-17	22.1	28.6₍₁₁₎	77
Giveout	6940	0.0	0.7	0	16.2	21.6	75
Hayden Fork	9160	0.0	1.6	0	24.5	34.6	71
Kelley R.S.	8240	0.0	1.0	0	22.1	27.2	81
Klondike Narrows	7280	-0.1	0.3₍₁₁₎	-33	30.3	34.4₍₁₁₎	88
Lily Lake	9130	0.0	1.5	0	17.8	28.3	63
Monte Cristo	8930	-0.1	1.2	-8	28.8	37.4	77
Oxford Spring	6790	-0.2	0.8	-25	20.2	27.2	74
Salt River Summit	7630	0.0	1.0	0	16.7	26.2	64
Sedgwick Peak	7800	0.0	1.2	0	27.0	32.2	84
Slug Creek Divide	7240	-0.1	1.1	-9	27.8	33.3	83
Spring Creek Divide	9020	-M	1.2	*	-M	35.8	*
Tony Grove Lake	8450	-M	0.8	*	-M	46.2	*
Trial Lake	9970	0.2	2.1	10	28.7	36.6	78
Usu Doc Daniel	8610	0.0	0.6₍₁₃₎	0	31.6	38.5₍₁₃₎	82
Basin Index (%)		-1			78

-M = Missing data.
* = Analysis may not provide a valid measure of conditions.
N/A = Not available.

Footnotes for median and average:
(##) = If less than 30 years are available, this value specifies the number of years used for the median and average calculations.
Sites with less than 10 years available do not have medians or averages.

The % Monthly Total represents the precipitation accumulated from the 1st day of the current
month through the current day found at selected SNOTEL sites in or near the basin compared
to the Median (or Average) total precipitation for the current month for those sites.

The % Annual Total represents the precipitation accumulated from the start of the water year
(Oct 1) through the current day found at selected SNOTEL sites in or near the basin compared
to the Median (or Average) total precipitation for the entire water year for those sites.

Contact your state water supply staff for assistance.

Medians and averages are calculated for the period 1991-2020.

Provisional data, subject to revision.

* Site -- Either: (a) the current value is missing; (b) the median or average for the day is not available or is zero; or (c) for snow water equivalent, the median or average for the day is less than 10% of the maximum median or average value for the year.

* Basin - More than half of the stations for a basin with normals report missing or invalid data.

The basin index is calculated as the sum of the valid current values divided by the sum of the corresponding medians or averages and the resulting fraction multiplied by 100.