Washington SNOTEL Snow/Precipitation Update Report

Washington 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 Monday, May 12, 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
SPOKANE
Sherwin	3190	0.0	0.0	*	27.4	32.1₍₂₉₎	85
Ragged Mountain	4210	0.0	0.0₍₁₄₎	*	37.2	37.0₍₁₄₎	101
Humboldt Gulch	4260	0.0	0.0	*	31.6	41.8	76
Mica Creek	4480	0.0	4.1	0	38.3	43.2	89
Quartz Peak	4710	0.0	3.3	0	40.0	37.6	106
Lookout	5180	4.2	15.7	27	31.6	42.1	75
Mosquito Ridge	5270	14.4	24.8₍₂₉₎	58	39.9	48.3	83
Sunset	5580	1.4	13.7	10	26.9	39.6	68
Lost Lake	6090	39.0	49.2	79	56.8	65.3	87
Basin Index (%)		53			85
LOWER PEND OREILLE
Quartz Peak	4710	0.0	3.3	0	40.0	37.6	106
Bunchgrass Mdw	5020	15.1	21.9	69	36.7	41.0	90
Hidden Lake	5000	20.5	26.4₍₂₀₎	78	48.4	63.0₍₂₀₎	77
Mosquito Ridge	5270	14.4	24.8₍₂₉₎	58	39.9	48.3	83
Schweitzer Basin	6090	44.0	44.2	100	44.5	45.0	99
Basin Index (%)		78			89
UPPER COLUMBIA
Swamp Creek	3930	0.0	0.0₍₂₁₎	*	26.5	38.5₍₂₁₎	69
Gold Mountain	4500	0.0	N/A	*	20.6	N/A	*
Salmon Meadows	4460	0.0	0.0	*	15.2	14.5	105
Muckamuck	4470	0.0	N/A	*	14.6	N/A	*
Sentinel Butte	4680	0.0	0.0₍₁₇₎	*	16.2	14.6₍₁₇₎	111
Rainy Pass	4880	14.9	29.6	50	34.6	49.2	70
Moses Mtn	5470	0.2	4.9₍₂₉₎	4	22.7	20.6₍₂₉₎	110
Gold Axe Camp	5380	0.0	0.0₍₁₀₎	*	14.7	13.2₍₁₀₎	111
Harts Pass	6490	26.7	36.9	72	32.3	43.8	74
Basin Index (%)		59*			83
CENTRAL COLUMBIA
Trinity	2900	0.0	0.4₍₁₀₎	0*	48.4	59.4₍₁₀₎	81
Fish Lake	3430	0.0	13.9	0	42.3	55.8	76
Pope Ridge	3600	0.0	0.0	*	25.3	28.8	88
Stevens Pass	3940	7.3	25.0	29	61.9	80.8	77
Blewett Pass	4240	0.0	0.0	*	24.8	29.2	85
Upper Wheeler	4330	0.0	0.0	*	20.2	23.0₍₂₉₎	88
Park Creek Ridge	4610	6.0	30.2	20	49.8	60.5	82
Rainy Pass	4880	14.9	29.6	50	34.6	49.2	70
Grouse Camp	5390	0.0	2.8	0	24.8	28.4	87
Trough	5480	0.0	0.0	*	22.9	22.2	103
Lyman Lake	5990	30.1	58.4	52	57.4	68.9	83
Basin Index (%)		36			81
UPPER YAKIMA
Fish Lake	3430	0.0	13.9	0	42.3	55.8	76
Stampede Pass	3850	12.0	26.0	46	51.6	75.4	68
Olallie Meadows	4010	27.6	46.2	60	79.9	109.0	73
Blewett Pass	4240	0.0	0.0	*	24.8	29.2	85
Sasse Ridge	4340	4.3	19.1	23	41.5	52.2	80
Grouse Camp	5390	0.0	2.8	0	24.8	28.4	87
Trough	5480	0.0	0.0	*	22.9	22.2	103
Basin Index (%)		41			77
NACHES
White Pass E.S.	4440	10.1	13.1	77	40.8	40.7	100
Bumping Ridge	4600	7.7	17.5	44	50.9	55.7	91
Sawmill Ridge	4640	0.0	26.5₍₁₄₎	0	40.0	63.1₍₁₄₎	63
Cayuse Pass	5260	44.0	52.6₍₁₄₎	84	-M	82.1₍₁₁₎	*
Morse Lake	5400	40.7	49.5	82	70.8	76.6	92
Corral Pass	5810	18.2	34.4₍₂₉₎	53	42.2	51.6₍₂₉₎	82
Pigtail Peak	5800	37.4	52.2	72	58.6	74.4	79
Green Lake	5930	9.0	17.6	51	31.8	32.7	97
Basin Index (%)		63			85
LOWER YAKIMA
Satus Pass	3960	0.0	N/A	*	31.9	N/A	*
Lost Horse	5100	0.0	0.9	0*	20.3	27.4	74
Indian Rock	5310	0.0	N/A	*	36.3	44.6₍₁₂₎	81
Green Lake	5930	9.0	17.6	51	31.8	32.7	97
Basin Index (%)		49			84
KLICKITAT
Satus Pass	3960	0.0	N/A	*	31.9	N/A	*
Potato Hill	4480	17.6	16.8	105	52.0	57.4	91
Lost Horse	5100	0.0	0.9	0*	20.3	27.4	74
Indian Rock	5310	0.0	N/A	*	36.3	44.6₍₁₂₎	81
Green Lake	5930	9.0	17.6	51	31.8	32.7	97
Basin Index (%)		75			87
LOWER SNAKE, WALLA WALLA
Sourdough Gulch	3970	0.0	0.0₍₂₀₎	*	9.9	13.2₍₂₀₎	75
Bowman Springs	4540	0.0	0.0	*	22.1	20.6	107
County Line	4840	0.0	0.0	*	17.6	16.4	107
High Ridge	4900	10.2	4.2	243	41.3	43.8	94
Beaver Reservoir	5140	0.0	0.0	*	22.5	23.4	96
Schneider Meadows	5400	17.9	10.2	175	48.2	40.5	119
Touchet	5520	7.8	15.0	52	42.9	49.2	87
Milk Shakes	5580	27.5	32.9₍₁₃₎	84	59.0	63.2₍₁₃₎	93
Wolf Creek	5730	0.0	0.0	*	23.9	22.5	106
Spruce Springs	5690	0.0	0.0₍₂₀₎	*	27.9	30.8₍₂₀₎	91
Taylor Green	5730	0.2	0.2	100*	34.1	31.0	110
Moss Springs	5760	4.5	14.6	31	36.5	42.1	87
Aneroid Lake #2	7430	18.4	24.2	76	33.6	35.6	94
Mt. Howard	7840	5.8	16.4	35	32.0	32.6	98
Basin Index (%)		78			97
LOWER COLUMBIA
Pepper Creek	2140	0.0	0.0₍₁₃₎	*	56.4	57.6₍₁₃₎	98
Calamity	2510	0.0	0.0₍₁₂₎	*	84.3	88.7₍₁₂₎	95
Spencer Meadow	3400	2.0	8.6	23	83.2	88.5	94
June Lake	3440	25.7	23.4	110	129.0	147.6	87
Spirit Lake	3520	0.0	0.0	*	74.1	77.0	96
Skate Creek	3770	10.7	N/A	*	76.4	N/A	*
Lone Pine	3940	34.3	28.9	119	86.2	88.2	98
Sheep Canyon	3990	27.3	23.0	119	137.7	117.8	117
Surprise Lakes	4280	33.2	34.2	97	82.6	92.0	90
Pinto Rock	4450	20.1	N/A	*	58.1	N/A	*
Swift Creek	4440	77.3	58.0₍₁₈₎	133	169.0	139.0₍₁₈₎	122
White Pass E.S.	4440	10.1	13.1	77	40.8	40.7	100
Potato Hill	4480	17.6	16.8	105	52.0	57.4	91
Paradise	5150	65.1	76.3	85	86.1	106.0	81
Cayuse Pass	5260	44.0	52.6₍₁₄₎	84	-M	82.1₍₁₁₎	*
Morse Lake	5400	40.7	49.5	82	70.8	76.6	92
Pigtail Peak	5800	37.4	52.2	72	58.6	74.4	79
Basin Index (%)		95			97
SOUTH PUGET SOUND
Huckleberry Creek	2250	0.0	0.0₍₂₃₎	*	30.6	37.5₍₂₃₎	82
Mowich	3170	0.0	0.0₍₂₂₎	*	42.7	48.8₍₂₂₎	88
Cougar Mountain	3210	0.0	0.0	*	63.4	84.5	75
Meadows Pass	3230	0.0	8.0₍₂₇₎	0	69.3	85.6₍₂₇₎	81
Skate Creek	3770	10.7	N/A	*	76.4	N/A	*
Rex River	3810	4.6	20.0₍₂₄₎	23	81.0	96.6₍₂₅₎	84
Stampede Pass	3850	12.0	26.0	46	51.6	75.4	68
Lynn Lake	3910	0.0	11.8₍₁₃₎	0	70.7	97.9₍₁₃₎	72
Burnt Mountain	4160	0.0	7.9₍₂₁₎	0	50.6	62.6₍₂₁₎	81
Sawmill Ridge	4640	0.0	26.5₍₁₄₎	0	40.0	63.1₍₁₄₎	63
Paradise	5150	65.1	76.3	85	86.1	106.0	81
Cayuse Pass	5260	44.0	52.6₍₁₄₎	84	-M	82.1₍₁₁₎	*
Morse Lake	5400	40.7	49.5	82	70.8	76.6	92
Corral Pass	5810	18.2	34.4₍₂₉₎	53	42.2	51.6₍₂₉₎	82
Basin Index (%)		59			79
CENTRAL PUGET SOUND
Mount Gardner	2930	0.0	0.0₍₂₇₎	*	67.8	88.6₍₂₇₎	77
Tinkham Creek	3000	0.9	12.4₍₂₇₎	7	73.6	94.2₍₂₇₎	78
Cougar Mountain	3210	0.0	0.0	*	63.4	84.5	75
Meadows Pass	3230	0.0	8.0₍₂₇₎	0	69.3	85.6₍₂₇₎	81
Skookum Creek	3310	0.0	20.2₍₂₄₎	0	104.2	128.8₍₂₄₎	81
Alpine Meadows	3500	19.3	48.1₍₂₆₎	40	110.5	143.6₍₂₆₎	77
Rex River	3810	4.6	20.0₍₂₄₎	23	81.0	96.6₍₂₅₎	84
Stevens Pass	3940	7.3	25.0	29	61.9	80.8	77
Olallie Meadows	4010	27.6	46.2	60	79.9	109.0	73
Basin Index (%)		33			78
NORTH PUGET SOUND
Hozomeen Camp	1680	-M	N/A	*	28.2	35.4₍₁₉₎	80
Elbow Lake	3050	0.0	22.9₍₂₅₎	0	114.6	126.4₍₂₅₎	91
Marten Ridge	3520	33.6	53.9₍₁₄₎	62	116.4	133.0₍₁₄₎	88
Beaver Pass	3630	19.8	32.3₍₁₉₎	61	58.1	65.1₍₁₈₎	89
Swamp Creek	3930	0.0	0.0₍₂₁₎	*	26.5	38.5₍₂₁₎	69
Wells Creek	4030	22.0	25.2₍₂₄₎	87	62.9	71.8₍₂₅₎	88
Thunder Basin	4310	5.4	20.4	26	48.4	59.4	81
Rainy Pass	4880	14.9	29.6	50	34.6	49.2	70
MF Nooksack	4940	39.6	67.6₍₁₈₎	59	83.1	96.4₍₁₈₎	86
Easy Pass	5280	74.0	95.0₍₁₀₎	78	-M	N/A	*
Brown Top	5840	38.6	62.6₍₁₁₎	62	-M	N/A	*
Lyman Lake	5990	30.1	58.4	52	57.4	68.9	83
Harts Pass	6490	26.7	36.9	72	32.3	43.8	74
Basin Index (%)		60			84
OLYMPIC
Mount Crag	3960	25.2	18.6	135	64.5	64.8₍₂₉₎	100
Dungeness	3990	0.0	0.0₍₂₁₎	*	36.2	39.6₍₂₂₎	91
Buckinghorse	4860	36.3	47.6₍₁₂₎	76	102.1	119.4₍₁₂₎	86
Waterhole	5010	22.7	34.8₍₂₁₎	65	55.1	65.8₍₂₁₎	84
Basin Index (%)		83			89

-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.