Idaho Southern SNOTEL Snow/Precipitation Update Report

Idaho Southern SNOTEL Snow/Precipitation 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 Thursday, August 20, 2026

Basin Site Name	Elev (ft)	Snow Water Equivalent			Water Year-to-Date Precipitation
Basin Site Name	Elev (ft)	Current (in)	Median (in)	Pct of Median	Current (in)	Median (in)	Pct of Median
WEISER BASIN
Bear Saddle	6170	0.0	0.0	*	25.0	31.8	79
Puhi Flat	6240	-M	0.0	*	41.5	42.6	97
Van Wyck	4960	0.0	0.0₍₁₉₎	*	20.3	24.3₍₁₉₎	84
West Branch	5590	0.0	0.0	*	37.2	40.4	92
Basin Index (%)		*			89
NF PAYETTE BASIN
Bear Basin	5350	0.0	0.0	*	31.5	33.2	95
Big Creek Summit	6550	0.0	0.0	*	44.6	43.8	102
Brundage Reservoir	6280	0.0	0.0	*	48.1	48.9	98
Long Valley	4890	0.0	0.0₍₁₉₎	*	23.7	22.7₍₁₉₎	104
Secesh Summit	6530	0.0	0.0	*	47.7	38.6	124
Puhi Flat	6240	-M	0.0	*	41.5	42.6	97
Basin Index (%)		*			103
SF PAYETTE BASIN
Banner Summit	7040	0.0	0.0	*	41.1	39.0	105
Cozy Cove	5410	-M	0.0	*	27.8	30.1	92
Deadwood Summit	6990	0.1	0.0	*	52.6	52.0	101
Jackson Peak	7060	0.0	0.0	*	42.0	42.3	99
Basin Index (%)		*			100
PAYETTE BASIN
Banner Summit	7040	0.0	0.0	*	41.1	39.0	105
Bear Basin	5350	0.0	0.0	*	31.5	33.2	95
Big Creek Summit	6550	0.0	0.0	*	44.6	43.8	102
Bogus Basin	6370	-M	0.0₍₂₁₎	*	29.4	28.3₍₂₁₎	104
Brundage Reservoir	6280	0.0	0.0	*	48.1	48.9	98
Cozy Cove	5410	-M	0.0	*	27.8	30.1	92
Deadwood Summit	6990	0.1	0.0	*	52.6	52.0	101
Jackson Peak	7060	0.0	0.0	*	42.0	42.3	99
Long Valley	4890	0.0	0.0₍₁₉₎	*	23.7	22.7₍₁₉₎	104
Secesh Summit	6530	0.0	0.0	*	47.7	38.6	124
Puhi Flat	6240	-M	0.0	*	41.5	42.6	97
Basin Index (%)		*			102
MF AND NF BOISE BASINS
Atlanta Summit	7570	0.1	0.0	*	-M	41.8	*
Graham Guard Sta.	5690	0.0	0.0	*	29.4	28.8	102
Jackson Peak	7060	0.0	0.0	*	42.0	42.3	99
Mores Creek Summit	6090	0.0	0.0	*	38.2	43.3	88
Trinity Mtn.	7790	0.0	0.0	*	38.7	45.4	85
Basin Index (%)		*			93
SF BOISE BASIN
Atlanta Summit	7570	0.1	0.0	*	-M	41.8	*
Camas Creek Divide	5720	0.0	0.0₍₂₉₎	*	19.7	22.6₍₂₈₎	87
Dollarhide Summit	8390	0.1	0.0	*	26.0	30.6	85
Prairie	4800	0.0	0.0	*	18.2	20.2	90
Trinity Mtn.	7790	0.0	0.0	*	38.7	45.4	85
Vienna Mine	8930	0.1	0.0	*	40.8	40.6	100
Basin Index (%)		*			90
MORES CREEK BASIN
Bogus Basin	6370	-M	0.0₍₂₁₎	*	29.4	28.3₍₂₁₎	104
Mores Creek Summit	6090	0.0	0.0	*	38.2	43.3	88
Basin Index (%)		*			94
BOISE BASIN
Atlanta Summit	7570	0.1	0.0	*	-M	41.8	*
Bogus Basin	6370	-M	0.0₍₂₁₎	*	29.4	28.3₍₂₁₎	104
Camas Creek Divide	5720	0.0	0.0₍₂₉₎	*	19.7	22.6₍₂₈₎	87
Dollarhide Summit	8390	0.1	0.0	*	26.0	30.6	85
Graham Guard Sta.	5690	0.0	0.0	*	29.4	28.8	102
Jackson Peak	7060	0.0	0.0	*	42.0	42.3	99
Mores Creek Summit	6090	0.0	0.0	*	38.2	43.3	88
Prairie	4800	0.0	0.0	*	18.2	20.2	90
Trinity Mtn.	7790	0.0	0.0	*	38.7	45.4	85
Vienna Mine	8930	0.1	0.0	*	40.8	40.6	100
Basin Index (%)		*			93
BIG WOOD BASIN ABOVE HAILEY
Chocolate Gulch	6310	0.0	0.0₍₂₇₎	*	19.2	20.1₍₂₇₎	96
Dollarhide Summit	8390	0.1	0.0	*	26.0	30.6	85
Galena	7470	0.0	0.0	*	24.3	23.8	102
Galena Summit	8790	0.0	0.0	*	27.0	27.4	99
Hyndman	7590	0.0	0.0	*	21.3	21.6	99
Lost-Wood Divide	7870	0.0	0.0	*	27.0	26.4	102
Vienna Mine	8930	0.1	0.0	*	40.8	40.6	100
Basin Index (%)		*			97
CAMAS BASIN
Camas Creek Divide	5720	0.0	0.0₍₂₉₎	*	19.7	22.6₍₂₈₎	87
Soldier R.S.	5780	0.0	0.0	*	17.9	21.6	83
Basin Index (%)		*			85
BIG WOOD BASIN
Camas Creek Divide	5720	0.0	0.0₍₂₉₎	*	19.7	22.6₍₂₈₎	87
Chocolate Gulch	6310	0.0	0.0₍₂₇₎	*	19.2	20.1₍₂₇₎	96
Dollarhide Summit	8390	0.1	0.0	*	26.0	30.6	85
Galena	7470	0.0	0.0	*	24.3	23.8	102
Galena Summit	8790	0.0	0.0	*	27.0	27.4	99
Hyndman	7590	0.0	0.0	*	21.3	21.6	99
Lost-Wood Divide	7870	0.0	0.0	*	27.0	26.4	102
Soldier R.S.	5780	0.0	0.0	*	17.9	21.6	83
Vienna Mine	8930	0.1	0.0	*	40.8	40.6	100
Basin Index (%)		*			95
LITTLE WOOD BASIN
Bear Canyon	7920	0.2	0.0	*	27.2	24.6	111
Garfield R.S.	6580	0.0	0.0	*	18.7	18.4	102
Hyndman	7590	0.0	0.0	*	21.3	21.6	99
Smiley Mountain	9540	-M	0.0₍₁₉₎	*	-M	28.8₍₁₉₎	*
Swede Peak	7640	0.2	0.0	*	21.3	22.8	93
Basin Index (%)		*			101
UPPER BIG LOST BASIN
Bear Canyon	7920	0.2	0.0	*	27.2	24.6	111
Lost-Wood Divide	7870	0.0	0.0	*	27.0	26.4	102
Smiley Mountain	9540	-M	0.0₍₁₉₎	*	-M	28.8₍₁₉₎	*
Stickney Mill	7440	0.0	0.0	*	17.8	17.3	103
Basin Index (%)		*			105
BIG LOST BASIN
Bear Canyon	7920	0.2	0.0	*	27.2	24.6	111
Hilts Creek	8090	0.0	0.0	*	24.0	19.5	123
Lost-Wood Divide	7870	0.0	0.0	*	27.0	26.4	102
Smiley Mountain	9540	-M	0.0₍₁₉₎	*	-M	28.8₍₁₉₎	*
Stickney Mill	7440	0.0	0.0	*	17.8	17.3	103
Basin Index (%)		*			109
LITTLE LOST BASIN
Hilts Creek	8090	0.0	0.0	*	24.0	19.5	123
Meadow Lake	9190	0.0	0.0	*	30.2	28.9	104
Moonshine	7490	0.0	0.0	*	21.8	18.9	115
Basin Index (%)		*			113
BIRCH BASIN
Meadow Lake	9190	0.0	0.0	*	30.2	28.9	104
Beagle Springs	8880	0.0	0.0	*	20.0	20.9	96
Basin Index (%)		*			101
MEDICINE LODGE, BEAVER, CAMAS BASINS
Beagle Springs	8880	0.0	0.0	*	20.0	20.9	96
Crab Creek	6870	0.0	0.0	*	25.5	24.3	105
Lakeview Ridge	7340	0.0	0.0	*	30.1	24.0	125
Basin Index (%)		*			109
HENRYS FORK ABOVE ISLAND PARK
Black Bear	8160	0.0	0.0	*	51.1	51.1	100
Island Park	6300	0.0	0.0	*	24.5	26.5	92
White Elephant	7670	0.0	0.0	*	41.9	42.4	99
Basin Index (%)		*			98
FALLS BASIN
Grassy Lake	7330	-M	0.0	*	-M	47.6	*
Lewis Lake Divide	7880	0.0	0.0	*	50.4	45.4	111
Basin Index (%)		*			111
HENRYS FORK ABOVE ST. ANTHONY
Black Bear	8160	0.0	0.0	*	51.1	51.1	100
Grassy Lake	7330	-M	0.0	*	-M	47.6	*
Island Park	6300	0.0	0.0	*	24.5	26.5	92
Lewis Lake Divide	7880	0.0	0.0	*	50.4	45.4	111
White Elephant	7670	0.0	0.0	*	41.9	42.4	99
Basin Index (%)		*			102
TETON BASIN
Grand Targhee	9260	0.2	0.0₍₁₄₎	*	44.0	46.4₍₁₄₎	95
Phillips Bench	8170	0.0	0.0	*	37.2	37.4	99
Pine Creek Pass	6710	0.2	0.0	*	26.6	30.8	86
Basin Index (%)		*			94
HENRYS FORK ABOVE REXBURG
Black Bear	8160	0.0	0.0	*	51.1	51.1	100
Grand Targhee	9260	0.2	0.0₍₁₄₎	*	44.0	46.4₍₁₄₎	95
Grassy Lake	7330	-M	0.0	*	-M	47.6	*
Island Park	6300	0.0	0.0	*	24.5	26.5	92
Lewis Lake Divide	7880	0.0	0.0	*	50.4	45.4	111
Phillips Bench	8170	0.0	0.0	*	37.2	37.4	99
Pine Creek Pass	6710	0.2	0.0	*	26.6	30.8	86
White Elephant	7670	0.0	0.0	*	41.9	42.4	99
Basin Index (%)		*			98
SNAKE BASIN ABOVE JACKSON LAKE
Grassy Lake	7330	-M	0.0	*	-M	47.6	*
Lewis Lake Divide	7880	0.0	0.0	*	50.4	45.4	111
Snake River Station	6900	0.0	0.0	*	29.2	32.1	91
Thumb Divide	7970	0.0	0.0	*	28.6	26.6	108
Two Ocean Plateau	9240	0.0	0.0	*	43.3	39.2	110
Basin Index (%)		*			106
PACIFIC AND BUFFALO BASINS
Base Camp	7040	0.0	0.0	*	30.3	29.0	104
Togwotee Pass	9590	0.0	0.0	*	40.5	35.2	115
Two Ocean Plateau	9240	0.0	0.0	*	43.3	39.2	110
Basin Index (%)		*			110
GROS VENTRE BASIN
Gros Ventre Summit	8760	0.0	0.0	*	22.7	20.3	112
Gunsight Pass	9820	-M	0.0₍₂₂₎	*	-M	22.6₍₂₂₎	*
Togwotee Pass	9590	0.0	0.0	*	40.5	35.2	115
Basin Index (%)		*			114
HOBACK BASIN
Blind Bull Sum	8880	0.0	0.0	*	-M	26.6	*
East Rim Divide	8010	-M	0.0	*	-M	18.4	*
Granite Creek	6770	0.0	0.0	*	27.3	28.5	96
Gros Ventre Summit	8760	0.0	0.0	*	22.7	20.3	112
Loomis Park	8240	-M	0.0	*	-M	25.6	*
Basin Index (%)		*			102*
GREYS BASIN
Blind Bull Sum	8880	0.0	0.0	*	-M	26.6	*
Cottonwood Creek	7710	0.0	0.0	*	34.4	36.5	94
Spring Creek Divide	9020	0.0	0.0	*	32.7	33.6	97
Willow Creek	8060	0.2	0.0	*	43.6	48.3	90
Basin Index (%)		*			93
SALT BASIN
Cottonwood Creek	7710	0.0	0.0	*	34.4	36.5	94
Salt River Summit	7630	0.0	0.0	*	21.1	23.4	90
Willow Creek	8060	0.2	0.0	*	43.6	48.3	90
Basin Index (%)		*			92
SNAKE BASIN ABOVE PALISADES
Base Camp	7040	0.0	0.0	*	30.3	29.0	104
Blind Bull Sum	8880	0.0	0.0	*	-M	26.6	*
Cottonwood Creek	7710	0.0	0.0	*	34.4	36.5	94
East Rim Divide	8010	-M	0.0	*	-M	18.4	*
Granite Creek	6770	0.0	0.0	*	27.3	28.5	96
Grassy Lake	7330	-M	0.0	*	-M	47.6	*
Gros Ventre Summit	8760	0.0	0.0	*	22.7	20.3	112
Gunsight Pass	9820	-M	0.0₍₂₂₎	*	-M	22.6₍₂₂₎	*
Lewis Lake Divide	7880	0.0	0.0	*	50.4	45.4	111
Loomis Park	8240	-M	0.0	*	-M	25.6	*
Phillips Bench	8170	0.0	0.0	*	37.2	37.4	99
Salt River Summit	7630	0.0	0.0	*	21.1	23.4	90
Snake River Station	6900	0.0	0.0	*	29.2	32.1	91
Spring Creek Divide	9020	0.0	0.0	*	32.7	33.6	97
Thumb Divide	7970	0.0	0.0	*	28.6	26.6	108
Togwotee Pass	9590	0.0	0.0	*	40.5	35.2	115
Two Ocean Plateau	9240	0.0	0.0	*	43.3	39.2	110
Willow Creek	8060	0.2	0.0	*	43.6	48.3	90
Basin Index (%)		*			101
WILLOW BASIN
Sheep Mtn.	6630	0.0	0.0	*	21.0	23.6	89
Somsen Ranch	6830	0.0	0.0	*	22.5	24.8	91
Basin Index (%)		*			90
BLACKFOOT BASIN
Slug Creek Divide	7240	0.0	0.0	*	28.4	31.0	92
Somsen Ranch	6830	0.0	0.0	*	22.5	24.8	91
Basin Index (%)		*			91
PORTNEUF BASIN
Oxford Spring	6790	0.0	0.0₍₂₉₎	*	20.3	24.0	85
Sedgwick Peak	7800	0.0	0.0	*	26.8	29.9	90
Wildhorse Divide	6480	0.0	0.0	*	25.3	26.0	97
Basin Index (%)		*			91
SNAKE BASIN AB AMERICAN FALLS
Base Camp	7040	0.0	0.0	*	30.3	29.0	104
Black Bear	8160	0.0	0.0	*	51.1	51.1	100
Blind Bull Sum	8880	0.0	0.0	*	-M	26.6	*
Cottonwood Creek	7710	0.0	0.0	*	34.4	36.5	94
East Rim Divide	8010	-M	0.0	*	-M	18.4	*
Grand Targhee	9260	0.2	0.0₍₁₄₎	*	44.0	46.4₍₁₄₎	95
Granite Creek	6770	0.0	0.0	*	27.3	28.5	96
Grassy Lake	7330	-M	0.0	*	-M	47.6	*
Gros Ventre Summit	8760	0.0	0.0	*	22.7	20.3	112
Gunsight Pass	9820	-M	0.0₍₂₂₎	*	-M	22.6₍₂₂₎	*
Island Park	6300	0.0	0.0	*	24.5	26.5	92
Lewis Lake Divide	7880	0.0	0.0	*	50.4	45.4	111
Loomis Park	8240	-M	0.0	*	-M	25.6	*
Oxford Spring	6790	0.0	0.0₍₂₉₎	*	20.3	24.0	85
Phillips Bench	8170	0.0	0.0	*	37.2	37.4	99
Pine Creek Pass	6710	0.2	0.0	*	26.6	30.8	86
Salt River Summit	7630	0.0	0.0	*	21.1	23.4	90
Sedgwick Peak	7800	0.0	0.0	*	26.8	29.9	90
Sheep Mtn.	6630	0.0	0.0	*	21.0	23.6	89
Slug Creek Divide	7240	0.0	0.0	*	28.4	31.0	92
Snake River Station	6900	0.0	0.0	*	29.2	32.1	91
Somsen Ranch	6830	0.0	0.0	*	22.5	24.8	91
Spring Creek Divide	9020	0.0	0.0	*	32.7	33.6	97
Thumb Divide	7970	0.0	0.0	*	28.6	26.6	108
Togwotee Pass	9590	0.0	0.0	*	40.5	35.2	115
Two Ocean Plateau	9240	0.0	0.0	*	43.3	39.2	110
White Elephant	7670	0.0	0.0	*	41.9	42.4	99
Wildhorse Divide	6480	0.0	0.0	*	25.3	26.0	97
Willow Creek	8060	0.2	0.0	*	43.6	48.3	90
Basin Index (%)		*			98
RAFT BASIN
George Creek	8960	0.0	0.0₍₁₁₎	*	24.3	28.4₍₁₀₎	86
Howell Canyon	8010	0.0	0.0	*	31.5	38.4₍₂₉₎	82
Basin Index (%)		*			84
GOOSE CREEK BASIN
Bostetter R.S.	7530	0.0	0.0	*	22.5	26.8	84
Magic Mountain	6940	0.0	0.0	*	18.6	30.8	60
Basin Index (%)		*			71
SALMON FALLS BASIN
Bear Creek	8090	0.0	0.0	*	23.4	33.1	71
Bostetter R.S.	7530	0.0	0.0	*	22.5	26.8	84
Magic Mountain	6940	0.0	0.0	*	18.6	30.8	60
Pole Creek R.S.	8370	0.0	0.0	*	15.5	20.2	77
Wilson Creek	7110	0.3	0.0	*	18.9	26.6	71
Basin Index (%)		*			72
JARBIDGE BASIN
Bear Creek	8090	0.0	0.0	*	23.4	33.1	71
Seventysix Creek	7360	-M	0.0	*	-M	19.8	*
Pole Creek R.S.	8370	0.0	0.0	*	15.5	20.2	77
Basin Index (%)		*			73
BRUNEAU BASIN
Bear Creek	8090	0.0	0.0	*	23.4	33.1	71
Big Bend	6890	0.0	0.0	*	12.2	16.6	73
Pole Creek R.S.	8370	0.0	0.0	*	15.5	20.2	77
Seventysix Creek	7360	-M	0.0	*	-M	19.8	*
Wilson Creek	7110	0.3	0.0	*	18.9	26.6	71
Basin Index (%)		*			73
OWYHEE BASIN
Big Bend	6890	0.0	0.0	*	12.2	16.6	73
Fawn Creek	7040	0.0	0.0	*	19.5	31.2	62
Jack Creek Upper	7380	0.0	0.0	*	20.0	26.5	75
Laurel Draw	6680	0.0	0.0	*	20.1	24.6	82
Mud Flat	5750	0.0	0.0	*	9.5	15.9	60
Reynolds Creek	5590	0.0	N/A	*	17.9	20.0₍₁₈₎	90
South Mtn.	6650	0.0	0.0	*	24.8	31.2	79
Taylor Canyon	6320	0.1	0.0	*	11.2	11.6	97
Basin Index (%)		*			76
BEAR BASIN ABOVE WOODRUFF
Bug Lake	7980	0.0	0.0	*	29.0	25.2	115
Dry Bread Pond	8290	0.0	0.0	*	26.5	27.0	98
Hayden Fork	9170	0.0	0.0	*	29.7	31.0	96
Lily Lake	9130	0.0	0.0	*	19.4	24.6	79
Monte Cristo	8930	0.1	0.0	*	32.8	34.4	95
Trial Lake	9970	0.8	0.0	*	28.1	32.7	86
Basin Index (%)		*			95
SMITH FORK
Kelley R.S.	8240	-M	0.0	*	25.0	25.2	99
Salt River Summit	7630	0.0	0.0	*	21.1	23.4	90
Spring Creek Divide	9020	0.0	0.0	*	32.7	33.6	97
Basin Index (%)		*			96
BEAR BASIN ABOVE PRESTON
Bug Lake	7980	0.0	0.0	*	29.0	25.2	115
Dry Bread Pond	8290	0.0	0.0	*	26.5	27.0	98
Emigrant Summit	7390	0.2	0.0	*	30.3	34.1	89
Franklin Basin	8140	0.0	0.0	*	40.4	38.9	104
Giveout	6940	0.3	0.0	*	19.3	20.0	96
Hayden Fork	9170	0.0	0.0	*	29.7	31.0	96
Kelley R.S.	8240	-M	0.0	*	25.0	25.2	99
Lily Lake	9130	0.0	0.0	*	19.4	24.6	79
Monte Cristo	8930	0.1	0.0	*	32.8	34.4	95
Oxford Spring	6790	0.0	0.0₍₂₉₎	*	20.3	24.0	85
Salt River Summit	7630	0.0	0.0	*	21.1	23.4	90
Sedgwick Peak	7800	0.0	0.0	*	26.8	29.9	90
Slug Creek Divide	7240	0.0	0.0	*	28.4	31.0	92
Spring Creek Divide	9020	0.0	0.0	*	32.7	33.6	97
Trial Lake	9970	0.8	0.0	*	28.1	32.7	86
Basin Index (%)		*			94
MALAD BASIN
Oxford Spring	6790	0.0	0.0₍₂₉₎	*	20.3	24.0	85
Basin Index (%)		*			85

-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.

If the Basin Index (%) percent value is flagged as potentially invalid,
care should be taken to evaluate if the value is representative
of conditions in the basin.

The SNOW WATER EQUIVALENT represents the depth of water in the snowpack, if the
snowpack were melted, expressed in inches.

The WATER YEAR-TO-DATE-PRECIPITATION represents total precipitation since October 1st, expressed in inches.

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.