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 Tuesday, May 20, 2025

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	2.5	0.0	*	31.8	29.2	109
Puhi Flat	6240	0.0	0.5	0*	39.0	37.9	103
Van Wyck	4960	0.0	0.0₍₁₉₎	*	20.1	21.0₍₁₉₎	96
West Branch	5590	0.0	0.0	*	39.5	35.0	113
Basin Index (%)		500*			106
NF PAYETTE BASIN
Bear Basin	5350	6.7	1.2	558*	29.9	29.3	102
Big Creek Summit	6560	12.4	17.4	71	36.8	39.1	94
Brundage Reservoir	6280	8.2	10.4	79	43.6	43.0	101
Long Valley	4890	0.0	0.0₍₁₉₎	*	22.2	20.3₍₁₉₎	109
Secesh Summit	6520	14.9	12.9	116	42.8	34.2	125
Puhi Flat	6240	0.0	0.5	0*	39.0	37.9	103
Basin Index (%)		100			105
SF PAYETTE BASIN
Banner Summit	7040	0.1	10.3	1	34.6	34.5	100
Cozy Cove	5410	-M	0.0	*	-M	25.8	*
Deadwood Summit	6990	30.9	25.6	121	49.6	48.0	103
Jackson Peak	7060	14.5	13.9	104	39.7	36.8	108
Basin Index (%)		91			104
PAYETTE BASIN
Banner Summit	7040	0.1	10.3	1	34.6	34.5	100
Bear Basin	5350	6.7	1.2	558*	29.9	29.3	102
Big Creek Summit	6560	12.4	17.4	71	36.8	39.1	94
Bogus Basin	6370	0.5	0.0₍₂₁₎	*	33.7	25.8₍₂₁₎	131
Brundage Reservoir	6280	8.2	10.4	79	43.6	43.0	101
Cozy Cove	5410	-M	0.0	*	-M	25.8	*
Deadwood Summit	6990	30.9	25.6	121	49.6	48.0	103
Jackson Peak	7060	14.5	13.9	104	39.7	36.8	108
Long Valley	4890	0.0	0.0₍₁₉₎	*	22.2	20.3₍₁₉₎	109
Secesh Summit	6520	14.9	12.9	116	42.8	34.2	125
Puhi Flat	6240	0.0	0.5	0*	39.0	37.9	103
Basin Index (%)		96			107
MF AND NF BOISE BASINS
Atlanta Summit	7570	16.0	16.8	95	35.3	36.1	98
Graham Guard Sta.	5680	0.0	0.0	*	26.9	25.4	106
Jackson Peak	7060	14.5	13.9	104	39.7	36.8	108
Mores Creek Summit	6090	0.3	7.0	4	42.4	40.6	104
Trinity Mtn.	7790	24.8	28.5	87	42.2	43.8	96
Basin Index (%)		84			102
SF BOISE BASIN
Atlanta Summit	7570	16.0	16.8	95	35.3	36.1	98
Camas Creek Divide	5720	0.0	0.0₍₂₉₎	*	21.3	20.3₍₂₈₎	105
Dollarhide Summit	8390	6.5	16.6	39	21.0	28.4	74
Prairie	4800	0.0	0.0	*	20.2	18.2	111
Trinity Mtn.	7790	24.8	28.5	87	42.2	43.8	96
Vienna Mine	8930	20.4	26.9	76	32.9	35.6	92
Basin Index (%)		76			95
MORES CREEK BASIN
Bogus Basin	6370	0.5	0.0₍₂₁₎	*	33.7	25.8₍₂₁₎	131
Mores Creek Summit	6090	0.3	7.0	4	42.4	40.6	104
Basin Index (%)		11			115
BOISE BASIN
Atlanta Summit	7570	16.0	16.8	95	35.3	36.1	98
Bogus Basin	6370	0.5	0.0₍₂₁₎	*	33.7	25.8₍₂₁₎	131
Camas Creek Divide	5720	0.0	0.0₍₂₉₎	*	21.3	20.3₍₂₈₎	105
Dollarhide Summit	8390	6.5	16.6	39	21.0	28.4	74
Graham Guard Sta.	5680	0.0	0.0	*	26.9	25.4	106
Jackson Peak	7060	14.5	13.9	104	39.7	36.8	108
Mores Creek Summit	6090	0.3	7.0	4	42.4	40.6	104
Prairie	4800	0.0	0.0	*	20.2	18.2	111
Trinity Mtn.	7790	24.8	28.5	87	42.2	43.8	96
Vienna Mine	8930	20.4	26.9	76	32.9	35.6	92
Basin Index (%)		76			101
BIG WOOD BASIN ABOVE HAILEY
Chocolate Gulch	6310	0.0	0.0₍₂₇₎	*	16.0	16.9₍₂₇₎	95
Dollarhide Summit	8390	6.5	16.6	39	21.0	28.4	74
Galena	7470	3.1	4.8	65	19.7	19.8	99
Galena Summit	8780	7.6	11.2	68	24.0	24.0	100
Hyndman	7590	0.0	0.0	*	15.9	18.9	84
Lost-Wood Divide	7870	0.0	5.8	0	21.4	22.1	97
Vienna Mine	8930	20.4	26.9	76	32.9	35.6	92
Basin Index (%)		58			91
CAMAS BASIN
Camas Creek Divide	5720	0.0	0.0₍₂₉₎	*	21.3	20.3₍₂₈₎	105
Soldier R.S.	5780	0.0	0.0	*	18.2	20.6	88
Basin Index (%)		*			97
BIG WOOD BASIN
Camas Creek Divide	5720	0.0	0.0₍₂₉₎	*	21.3	20.3₍₂₈₎	105
Chocolate Gulch	6310	0.0	0.0₍₂₇₎	*	16.0	16.9₍₂₇₎	95
Dollarhide Summit	8390	6.5	16.6	39	21.0	28.4	74
Galena	7470	3.1	4.8	65	19.7	19.8	99
Galena Summit	8780	7.6	11.2	68	24.0	24.0	100
Hyndman	7590	0.0	0.0	*	15.9	18.9	84
Lost-Wood Divide	7870	0.0	5.8	0	21.4	22.1	97
Soldier R.S.	5780	0.0	0.0	*	18.2	20.6	88
Vienna Mine	8930	20.4	26.9	76	32.9	35.6	92
Basin Index (%)		58			92
LITTLE WOOD BASIN
Bear Canyon	7920	0.0	4.8	0	18.7	21.2	88
Garfield R.S.	6580	0.0	0.0	*	11.9	15.2	78
Hyndman	7590	0.0	0.0	*	15.9	18.9	84
Smiley Mountain	9540	7.9	12.7₍₁₉₎	62	20.6	22.2₍₁₉₎	93
Swede Peak	7640	0.0	1.9	0	15.6	19.4	80
Basin Index (%)		41			85
UPPER BIG LOST BASIN
Bear Canyon	7920	0.0	4.8	0	18.7	21.2	88
Lost-Wood Divide	7870	0.0	5.8	0	21.4	22.1	97
Smiley Mountain	9540	7.9	12.7₍₁₉₎	62	20.6	22.2₍₁₉₎	93
Stickney Mill	7440	0.0	0.0	*	12.5	13.6	92
Basin Index (%)		34			93
BIG LOST BASIN
Bear Canyon	7920	0.0	4.8	0	18.7	21.2	88
Hilts Creek	8090	0.0	0.6	0*	13.6	16.2	84
Lost-Wood Divide	7870	0.0	5.8	0	21.4	22.1	97
Smiley Mountain	9540	7.9	12.7₍₁₉₎	62	20.6	22.2₍₁₉₎	93
Stickney Mill	7440	0.0	0.0	*	12.5	13.6	92
Basin Index (%)		33			91
LITTLE LOST BASIN
Hilts Creek	8090	0.0	0.6	0*	13.6	16.2	84
Meadow Lake	9190	7.6	11.3	67	19.8	22.4	88
Moonshine	7490	0.0	0.0	*	13.8	15.4	90
Basin Index (%)		64*			87
BIRCH BASIN
Meadow Lake	9190	7.6	11.3	67	19.8	22.4	88
Beagle Springs	8880	2.0	0.7	286*	15.2	13.9	109
Basin Index (%)		80			96
MEDICINE LODGE, BEAVER, CAMAS BASINS
Beagle Springs	8880	2.0	0.7	286*	15.2	13.9	109
Crab Creek	6870	0.0	0.0	*	15.4	18.0	86
Lakeview Ridge	7340	0.0	0.0	*	15.5	17.6	88
Basin Index (%)		286*			93
HENRYS FORK ABOVE ISLAND PARK
Black Bear	8160	24.6	34.9	70	40.4	43.0	94
Island Park	6300	0.0	0.0	*	19.9	20.8	96
White Elephant	7670	2.5	16.8	15	30.8	34.2	90
Basin Index (%)		52			93
FALLS BASIN
Grassy Lake	7330	13.2	15.5	85	39.9	41.4	96
Lewis Lake Divide	7880	14.4	21.9	66	40.1	39.3	102
Basin Index (%)		74			99
HENRYS FORK ABOVE ST. ANTHONY
Black Bear	8160	24.6	34.9	70	40.4	43.0	94
Grassy Lake	7330	13.2	15.5	85	39.9	41.4	96
Island Park	6300	0.0	0.0	*	19.9	20.8	96
Lewis Lake Divide	7880	14.4	21.9	66	40.1	39.3	102
White Elephant	7670	2.5	16.8	15	30.8	34.2	90
Basin Index (%)		61			96
TETON BASIN
Grand Targhee	9260	38.7	43.4₍₁₄₎	89	36.9	38.4₍₁₄₎	96
Phillips Bench	8160	14.3	19.4	74	31.8	31.2	102
Pine Creek Pass	6710	0.0	0.0	*	26.1	25.2	104
Basin Index (%)		84			100
HENRYS FORK ABOVE REXBURG
Black Bear	8160	24.6	34.9	70	40.4	43.0	94
Grand Targhee	9260	38.7	43.4₍₁₄₎	89	36.9	38.4₍₁₄₎	96
Grassy Lake	7330	13.2	15.5	85	39.9	41.4	96
Island Park	6300	0.0	0.0	*	19.9	20.8	96
Lewis Lake Divide	7880	14.4	21.9	66	40.1	39.3	102
Phillips Bench	8160	14.3	19.4	74	31.8	31.2	102
Pine Creek Pass	6710	0.0	0.0	*	26.1	25.2	104
White Elephant	7670	2.5	16.8	15	30.8	34.2	90
Basin Index (%)		71			97
SNAKE BASIN ABOVE JACKSON LAKE
Grassy Lake	7330	13.2	15.5	85	39.9	41.4	96
Lewis Lake Divide	7880	14.4	21.9	66	40.1	39.3	102
Snake River Station	6900	0.0	0.0	*	25.7	26.8	96
Thumb Divide	7970	-M	0.4	*	-M	22.4	*
Two Ocean Plateau	9240	24.3	29.4	83	30.4	31.2	97
Basin Index (%)		78			98
PACIFIC AND BUFFALO BASINS
Base Camp	7040	0.0	0.0	*	24.9	24.6	101
Togwotee Pass	9590	18.8	22.8	82	29.8	29.2	102
Two Ocean Plateau	9240	24.3	29.4	83	30.4	31.2	97
Basin Index (%)		83			100
GROS VENTRE BASIN
Gros Ventre Summit	8760	1.0	5.4	19	16.2	15.6	104
Gunsight Pass	9830	8.2	10.0₍₂₂₎	82	17.5	17.4₍₂₂₎	101
Togwotee Pass	9590	18.8	22.8	82	29.8	29.2	102
Basin Index (%)		73			102
HOBACK BASIN
Blind Bull Sum	8880	21.5	21.2	101	21.7	21.0	103
East Rim Divide	8010	0.0	0.0	*	14.7	14.0	105
Granite Creek	6770	0.0	0.0	*	21.9	22.6	97
Gros Ventre Summit	8760	1.0	5.4	19	16.2	15.6	104
Loomis Park	8240	0.0	1.6	0	20.3	20.6	99
Basin Index (%)		80			101
GREYS BASIN
Blind Bull Sum	8880	21.5	21.2	101	21.7	21.0	103
Cottonwood Creek	7710	9.5	7.9	120	34.0	30.0	113
Spring Creek Divide	9020	22.8	20.8	110	28.9	28.0	103
Willow Creek	8060	18.7	17.5	107	44.3	40.2	110
Basin Index (%)		108			108
SALT BASIN
Cottonwood Creek	7710	9.5	7.9	120	34.0	30.0	113
Salt River Summit	7630	0.0	0.0	*	15.9	19.0	84
Willow Creek	8060	18.7	17.5	107	44.3	40.2	110
Basin Index (%)		111			106
SNAKE BASIN ABOVE PALISADES
Base Camp	7040	0.0	0.0	*	24.9	24.6	101
Blind Bull Sum	8880	21.5	21.2	101	21.7	21.0	103
Cottonwood Creek	7710	9.5	7.9	120	34.0	30.0	113
East Rim Divide	8010	0.0	0.0	*	14.7	14.0	105
Granite Creek	6770	0.0	0.0	*	21.9	22.6	97
Grassy Lake	7330	13.2	15.5	85	39.9	41.4	96
Gros Ventre Summit	8760	1.0	5.4	19	16.2	15.6	104
Gunsight Pass	9830	8.2	10.0₍₂₂₎	82	17.5	17.4₍₂₂₎	101
Lewis Lake Divide	7880	14.4	21.9	66	40.1	39.3	102
Loomis Park	8240	0.0	1.6	0	20.3	20.6	99
Phillips Bench	8160	14.3	19.4	74	31.8	31.2	102
Salt River Summit	7630	0.0	0.0	*	15.9	19.0	84
Snake River Station	6900	0.0	0.0	*	25.7	26.8	96
Spring Creek Divide	9020	22.8	20.8	110	28.9	28.0	103
Thumb Divide	7970	-M	0.4	*	-M	22.4	*
Togwotee Pass	9590	18.8	22.8	82	29.8	29.2	102
Two Ocean Plateau	9240	24.3	29.4	83	30.4	31.2	97
Willow Creek	8060	18.7	17.5	107	44.3	40.2	110
Basin Index (%)		86			101
WILLOW BASIN
Sheep Mtn.	6630	0.0	0.0	*	18.3	19.4	94
Somsen Ranch	6830	0.0	0.0	*	19.6	19.8	99
Basin Index (%)		*			97
BLACKFOOT BASIN
Slug Creek Divide	7240	0.1	0.0	*	26.6	25.4	105
Somsen Ranch	6830	0.0	0.0	*	19.6	19.8	99
Basin Index (%)		*			102
PORTNEUF BASIN
Oxford Spring	6790	0.1	0.0₍₂₉₎	*	19.6	19.2	102
Sedgwick Peak	7800	0.0	1.1	0*	25.3	25.2	100
Wildhorse Divide	6480	0.3	0.0	*	27.8	23.1	120
Basin Index (%)		36*			108
SNAKE BASIN AB AMERICAN FALLS
Base Camp	7040	0.0	0.0	*	24.9	24.6	101
Black Bear	8160	24.6	34.9	70	40.4	43.0	94
Blind Bull Sum	8880	21.5	21.2	101	21.7	21.0	103
Cottonwood Creek	7710	9.5	7.9	120	34.0	30.0	113
East Rim Divide	8010	0.0	0.0	*	14.7	14.0	105
Grand Targhee	9260	38.7	43.4₍₁₄₎	89	36.9	38.4₍₁₄₎	96
Granite Creek	6770	0.0	0.0	*	21.9	22.6	97
Grassy Lake	7330	13.2	15.5	85	39.9	41.4	96
Gros Ventre Summit	8760	1.0	5.4	19	16.2	15.6	104
Gunsight Pass	9830	8.2	10.0₍₂₂₎	82	17.5	17.4₍₂₂₎	101
Island Park	6300	0.0	0.0	*	19.9	20.8	96
Lewis Lake Divide	7880	14.4	21.9	66	40.1	39.3	102
Loomis Park	8240	0.0	1.6	0	20.3	20.6	99
Oxford Spring	6790	0.1	0.0₍₂₉₎	*	19.6	19.2	102
Phillips Bench	8160	14.3	19.4	74	31.8	31.2	102
Pine Creek Pass	6710	0.0	0.0	*	26.1	25.2	104
Salt River Summit	7630	0.0	0.0	*	15.9	19.0	84
Sedgwick Peak	7800	0.0	1.1	0*	25.3	25.2	100
Sheep Mtn.	6630	0.0	0.0	*	18.3	19.4	94
Slug Creek Divide	7240	0.1	0.0	*	26.6	25.4	105
Snake River Station	6900	0.0	0.0	*	25.7	26.8	96
Somsen Ranch	6830	0.0	0.0	*	19.6	19.8	99
Spring Creek Divide	9020	22.8	20.8	110	28.9	28.0	103
Thumb Divide	7970	-M	0.4	*	-M	22.4	*
Togwotee Pass	9590	18.8	22.8	82	29.8	29.2	102
Two Ocean Plateau	9240	24.3	29.4	83	30.4	31.2	97
White Elephant	7670	2.5	16.8	15	30.8	34.2	90
Wildhorse Divide	6480	0.3	0.0	*	27.8	23.1	120
Willow Creek	8060	18.7	17.5	107	44.3	40.2	110
Basin Index (%)		80			100
RAFT BASIN
George Creek	8960	6.7	9.2₍₁₀₎	73	22.0	23.6₍₁₀₎	93
Howell Canyon	8010	3.6	9.6	38	32.5	33.6	97
Basin Index (%)		55			95
GOOSE CREEK BASIN
Bostetter R.S.	7530	0.0	0.0	*	22.2	21.6	103
Magic Mountain	6940	0.0	0.0	*	24.5	27.3	90
Basin Index (%)		*			96
SALMON FALLS BASIN
Bear Creek	8090	0.0	7.3	0	25.8	28.0	92
Bostetter R.S.	7530	0.0	0.0	*	22.2	21.6	103
Magic Mountain	6940	0.0	0.0	*	24.5	27.3	90
Pole Creek R.S.	8360	11.0	13.7	80	16.3	15.3	107
Wilson Creek	7110	0.0	0.0	*	21.2	21.7	98
Basin Index (%)		52*			97
JARBIDGE BASIN
Bear Creek	8090	0.0	7.3	0	25.8	28.0	92
Seventysix Creek	7360	0.0	0.0	*	17.5	16.5	106
Pole Creek R.S.	8360	11.0	13.7	80	16.3	15.3	107
Basin Index (%)		52			100
BRUNEAU BASIN
Bear Creek	8090	0.0	7.3	0	25.8	28.0	92
Big Bend	6890	0.0	0.0	*	14.3	13.0	110
Pole Creek R.S.	8360	11.0	13.7	80	16.3	15.3	107
Seventysix Creek	7360	0.0	0.0	*	17.5	16.5	106
Wilson Creek	7110	0.0	0.0	*	21.2	21.7	98
Basin Index (%)		52*			101
OWYHEE BASIN
Big Bend	6890	0.0	0.0	*	14.3	13.0	110
Fawn Creek	7040	0.0	0.0	*	25.2	27.2	93
Jack Creek Upper	7380	0.0	0.0	*	22.5	23.0	98
Laurel Draw	6680	0.0	0.0	*	23.2	20.2	115
Mud Flat	5750	0.0	0.0	*	14.1	13.2	107
Reynolds Creek	5590	0.0	N/A	*	18.0	15.8₍₁₈₎	114
South Mtn.	6650	0.0	0.0	*	32.7	27.6	118
Taylor Canyon	6320	0.0	0.0	*	9.1	9.8	93
Basin Index (%)		*			106
BEAR BASIN ABOVE WOODRUFF
Bug Lake	7980	0.0	5.2	0	22.1	20.3	109
Dry Bread Pond	8290	0.0	0.0	*	23.8	22.8	104
Hayden Fork	9160	0.0	0.0	*	24.1	24.8	97
Lily Lake	9130	0.0	0.0	*	17.2	20.4	84
Monte Cristo	8930	9.4	15.0	63	28.6	29.8	96
Trial Lake	9970	9.5	14.8	64	27.4	27.0	101
Basin Index (%)		54			99
SMITH FORK
Kelley R.S.	8240	1.8	2.1	86	21.5	20.4	105
Salt River Summit	7630	0.0	0.0	*	15.9	19.0	84
Spring Creek Divide	9020	22.8	20.8	110	28.9	28.0	103
Basin Index (%)		107			98
BEAR BASIN ABOVE PRESTON
Bug Lake	7980	0.0	5.2	0	22.1	20.3	109
Dry Bread Pond	8290	0.0	0.0	*	23.8	22.8	104
Emigrant Summit	7390	3.2	8.0	40	30.5	28.4	107
Franklin Basin	8140	12.4	12.4	100	35.6	33.7	106
Giveout	6940	0.0	0.0	*	15.9	15.7	101
Hayden Fork	9160	0.0	0.0	*	24.1	24.8	97
Kelley R.S.	8240	1.8	2.1	86	21.5	20.4	105
Lily Lake	9130	0.0	0.0	*	17.2	20.4	84
Monte Cristo	8930	9.4	15.0	63	28.6	29.8	96
Oxford Spring	6790	0.1	0.0₍₂₉₎	*	19.6	19.2	102
Salt River Summit	7630	0.0	0.0	*	15.9	19.0	84
Sedgwick Peak	7800	0.0	1.1	0*	25.3	25.2	100
Slug Creek Divide	7240	0.1	0.0	*	26.6	25.4	105
Spring Creek Divide	9020	22.8	20.8	110	28.9	28.0	103
Trial Lake	9970	9.5	14.8	64	27.4	27.0	101
Basin Index (%)		75*			101
MALAD BASIN
Oxford Spring	6790	0.1	0.0₍₂₉₎	*	19.6	19.2	102
Basin Index (%)		*			102

-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.