Idaho Northern SNOTEL Snow/Precipitation Update Report

Idaho Northern 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 Sunday, May 18, 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
IDAHO KOOTENAI RIVER REGION
Bear Mountain	5460	42.4	49.8₍₂₉₎	85	64.9	78.2	83
Garver Creek	4250	0.2	0.0	*	16.8	20.4₍₂₄₎	82
Hawkins Lake	6460	11.3	18.0	63	34.1	35.8	95
Hidden Lake	5000	16.0	21.4₍₂₀₎	75	49.8	63.2₍₂₀₎	79
Myrtle Creek	3540	0.1	0.0₍₁₇₎	*	21.6	23.1₍₁₇₎	94
Basin Index (%)		78			85
IDAHO PEND OREILLE RIVER REGION
Bear Mountain	5460	42.4	49.8₍₂₉₎	85	64.9	78.2	83
Bunchgrass Mdw	5020	13.3	17.9	74	38.0	41.3	92
Mosquito Ridge	5270	11.0	20.9₍₂₉₎	53	41.1	48.3	85
Quartz Peak	4710	1.4	0.0	*	41.0	39.2	105
Ragged Mountain	4210	0.1	0.0₍₁₄₎	*	38.0	38.2₍₁₄₎	99
Schweitzer Basin	6090	41.6	40.6	102	45.1	45.2	100
Basin Index (%)		85			92
COEUR d'ALENE BASIN
Humboldt Gulch	4260	0.0	0.0	*	31.6	42.0	75
Lookout	5180	0.7	11.2	6	32.4	42.2	77
Mosquito Ridge	5270	11.0	20.9₍₂₉₎	53	41.1	48.3	85
Sunset	5580	0.1	11.2	1	28.3	40.1	71
Basin Index (%)		27			77
ST. JOE BASIN
Hoodoo Basin	6060	-M	36.1	*	-M	51.4	*
Lost Lake	6090	35.9	44.6	80	58.0	65.6	88
Mica Creek	4480	0.0	0.0	*	39.2	43.5	90
Sherwin	3190	0.1	0.0	*	27.6	32.2₍₂₉₎	86
Basin Index (%)		81*			88
SPOKANE BASIN
Hoodoo Basin	6060	-M	36.1	*	-M	51.4	*
Humboldt Gulch	4260	0.0	0.0	*	31.6	42.0	75
Lookout	5180	0.7	11.2	6	32.4	42.2	77
Lost Lake	6090	35.9	44.6	80	58.0	65.6	88
Mica Creek	4480	0.0	0.0	*	39.2	43.5	90
Mosquito Ridge	5270	11.0	20.9₍₂₉₎	53	41.1	48.3	85
Quartz Peak	4710	1.4	0.0	*	41.0	39.2	105
Ragged Mountain	4210	0.1	0.0₍₁₄₎	*	38.0	38.2₍₁₄₎	99
Sherwin	3190	0.1	0.0	*	27.6	32.2₍₂₉₎	86
Sunset	5580	0.1	11.2	1	28.3	40.1	71
Basin Index (%)		56*			86
SELWAY BASIN
Mountain Meadows	6340	9.2	12.0	77	35.1	35.2	100
Nez Perce Camp	5670	0.1	0.2	50*	21.8	24.3	90
Twelvemile Creek	5530	0.1	0.0	*	35.8	38.3	93
Twin Lakes	6390	23.2	26.6	87	50.3	53.7	94
Basin Index (%)		84			94
LOCHSA BASIN
Lolo Pass	5280	0.7	8.2	9	34.4	39.0	88
Savage Pass	6170	7.0	13.0	54	30.9	37.2	83
Basin Index (%)		36			86
NF CLEARWATER BASIN
Cool Creek	6310	36.5	43.1	85	50.7	60.2	84
Crater Meadows	5960	27.1	33.2	82	54.4	59.9	91
Elk Butte	5680	8.8	20.2	44	39.0	48.6	80
Hemlock Butte	5800	22.7	29.8	76	39.5	N/A	*
Hoodoo Basin	6060	-M	36.1	*	-M	51.4	*
Lolo Pass	5280	0.7	8.2	9	34.4	39.0	88
Lost Lake	6090	35.9	44.6	80	58.0	65.6	88
Pierce R.S.	3080	0.0	0.0₍₁₁₎	*	31.1	36.6₍₁₁₎	85
Shanghi Summit	4590	0.0	0.0	*	40.6	47.0	86
Basin Index (%)		74			86
CLEARWATER BASIN
Cool Creek	6310	36.5	43.1	85	50.7	60.2	84
Crater Meadows	5960	27.1	33.2	82	54.4	59.9	91
Elk Butte	5680	8.8	20.2	44	39.0	48.6	80
Hemlock Butte	5800	22.7	29.8	76	39.5	N/A	*
Hoodoo Basin	6060	-M	36.1	*	-M	51.4	*
Lolo Pass	5280	0.7	8.2	9	34.4	39.0	88
Lost Lake	6090	35.9	44.6	80	58.0	65.6	88
Moscow Mountain	4700	0.0	0.0₍₂₀₎	*	34.4	37.6₍₂₀₎	91
Mountain Meadows	6340	9.2	12.0	77	35.1	35.2	100
Nez Perce Camp	5670	0.1	0.2	50*	21.8	24.3	90
Pierce R.S.	3080	0.0	0.0₍₁₁₎	*	31.1	36.6₍₁₁₎	85
Savage Pass	6170	7.0	13.0	54	30.9	37.2	83
Shanghi Summit	4590	0.0	0.0	*	40.6	47.0	86
Sherwin	3190	0.1	0.0	*	27.6	32.2₍₂₉₎	86
Twelvemile Creek	5530	0.1	0.0	*	35.8	38.3	93
Twin Lakes	6390	23.2	26.6	87	50.3	53.7	94
Basin Index (%)		74			88
SALMON RIVER ABOVE SALMON BASIN
Banner Summit	7040	2.1	12.6	17	34.5	34.4	100
Galena	7470	4.0	5.8	69	19.3	19.8	97
Galena Summit	8780	7.6	12.7	60	23.4	23.6	99
Mill Creek Summit	8790	13.7	15.9₍₂₉₎	86	21.5	22.2	97
Moonshine	7490	-M	0.0	*	-M	15.0	*
Morgan Creek	7620	0.4	0.0	*	16.5	17.7	93
Vienna Mine	8930	20.4	27.8	73	32.9	35.4	93
Basin Index (%)		64			97
LEMHI BASIN
Beagle Springs	8880	2.4	1.5	160	15.1	13.8	109
Darkhorse Lake	8930	25.2	29.3	86	31.7	33.0	96
Lemhi Ridge	8080	0.1	2.6	4	15.4	16.5	93
Meadow Lake	9190	7.8	12.2	64	19.7	22.0	90
Moonshine	7490	-M	0.0	*	-M	15.0	*
Schwartz Lake	8620	0.1	3.6₍₂₅₎	3	17.2	17.9₍₂₅₎	96
Basin Index (%)		72			96
MF SALMON BASIN
Banner Summit	7040	2.1	12.6	17	34.5	34.4	100
Deadwood Summit	6990	31.6	27.0	117	49.3	47.6	104
Morgan Creek	7620	0.4	0.0	*	16.5	17.7	93
Basin Index (%)		86			101
SF SALMON BASIN
Big Creek Summit	6560	13.5	18.8	72	36.7	38.7	95
Deadwood Summit	6990	31.6	27.0	117	49.3	47.6	104
Secesh Summit	6520	15.9	14.6	109	42.7	34.0	126
Basin Index (%)		101			107
LITTLE SALMON BASIN
Bear Basin	5350	7.6	3.0	253	29.9	29.3	102
Brundage Reservoir	6280	10.0	12.6	79	43.6	42.9	102
Puhi Flat	6240	0.1	2.0	5*	39.0	37.8	103
West Branch	5590	0.0	0.0	*	-M	34.8	*
Basin Index (%)		101			102
SALMON BASIN
Banner Summit	7040	2.1	12.6	17	34.5	34.4	100
Beagle Springs	8880	2.4	1.5	160	15.1	13.8	109
Bear Basin	5350	7.6	3.0	253	29.9	29.3	102
Big Creek Summit	6560	13.5	18.8	72	36.7	38.7	95
Brundage Reservoir	6280	10.0	12.6	79	43.6	42.9	102
Darkhorse Lake	8930	25.2	29.3	86	31.7	33.0	96
Deadwood Summit	6990	31.6	27.0	117	49.3	47.6	104
Galena	7470	4.0	5.8	69	19.3	19.8	97
Galena Summit	8780	7.6	12.7	60	23.4	23.6	99
Lemhi Ridge	8080	0.1	2.6	4	15.4	16.5	93
Meadow Lake	9190	7.8	12.2	64	19.7	22.0	90
Mill Creek Summit	8790	13.7	15.9₍₂₉₎	86	21.5	22.2	97
Moonshine	7490	-M	0.0	*	-M	15.0	*
Moose Creek	6170	0.0	0.0	*	19.5	23.4	83
Morgan Creek	7620	0.4	0.0	*	16.5	17.7	93
Mountain Meadows	6340	9.2	12.0	77	35.1	35.2	100
Saddle Mtn.	7890	14.4	18.1	80	21.2	26.7	79
Schwartz Lake	8620	0.1	3.6₍₂₅₎	3	17.2	17.9₍₂₅₎	96
Secesh Summit	6520	15.9	14.6	109	42.7	34.0	126
Puhi Flat	6240	0.1	2.0	5*	39.0	37.8	103
Vienna Mine	8930	20.4	27.8	73	32.9	35.4	93
West Branch	5590	0.0	0.0	*	-M	34.8	*
Basin Index (%)		80			99

-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.