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 Saturday, May 18, 2024

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	3200	-M	0.0	*	24.7	32.2₍₂₉₎	77
Ragged Mountain	4210	0.0	0.0₍₁₄₎	*	36.5	38.2₍₁₄₎	96
Humboldt Gulch	4250	-M	0.0	*	30.2	42.0	72
Mica Creek	4510	0.0	0.0	*	37.7	43.5	87
Quartz Peak	4700	0.0	0.0	*	-M	39.2	*
Lookout	5190	0.1	11.2	1	29.1	42.2	69
Mosquito Ridge	5260	10.5	20.9₍₂₉₎	50	42.7	48.3	88
Sunset	5540	3.4	11.2	30	28.1	40.1	70
Lost Lake	6110	32.4	44.6	73	54.3	65.6	83
Basin Index (%)		53*			80
LOWER PEND OREILLE
Quartz Peak	4700	0.0	0.0	*	-M	39.2	*
Bunchgrass Mdw	5000	10.1	17.9	56	39.8	41.3	96
Hidden Lake	5040	15.7	21.4₍₂₀₎	73	54.1	63.2₍₂₀₎	86
Mosquito Ridge	5260	10.5	20.9₍₂₉₎	50	42.7	48.3	88
Schweitzer Basin	6090	26.7	40.6	66	35.0	45.2	77
Basin Index (%)		62			87
UPPER COLUMBIA
Swamp Creek	3930	-M	0.0₍₂₁₎	*	29.0	39.3₍₂₁₎	74
Gold Mountain	4390	0.0	N/A	*	16.8	N/A	*
Salmon Meadows	4460	0.0	0.0	*	13.4	15.1	89
Muckamuck	4470	0.0	N/A	*	14.7	N/A	*
Sentinel Butte	4680	-M	0.0₍₁₇₎	*	15.8	15.1₍₁₇₎	105
Rainy Pass	4890	10.2	26.4	39	38.0	49.6	77
Moses Mtn	5010	0.1	0.3₍₂₉₎	33*	16.5	21.3₍₂₉₎	77
Gold Axe Camp	5360	0.0	0.0₍₁₀₎	*	13.3	13.2₍₁₀₎	101
Harts Pass	6490	25.0	36.5	68	32.0	44.6	72
Basin Index (%)		56*			80
CENTRAL COLUMBIA
Trinity	2930	0.0	0.0₍₁₀₎	*	47.9	59.8₍₁₀₎	80
Fish Lake	3430	0.2	8.4	2	45.4	56.5	80
Pope Ridge	3590	0.0	0.0	*	25.4	29.6	86
Stevens Pass	3950	4.5	19.6	23	60.2	82.5	73
Blewett Pass	4240	-M	0.0	*	27.8	29.2	95
Upper Wheeler	4330	-M	0.0	*	21.9	24.2₍₂₉₎	90
Park Creek Ridge	4600	0.4	22.8	2	32.4	61.2	53
Rainy Pass	4890	10.2	26.4	39	38.0	49.6	77
Grouse Camp	5390	-M	0.2	*	24.3	28.8	84
Trough	5480	-M	0.0	*	24.0	22.9	105
Lyman Lake	5980	24.8	56.8	44	58.3	69.6	84
Basin Index (%)		30*			79
UPPER YAKIMA
Fish Lake	3430	0.2	8.4	2	45.4	56.5	80
Stampede Pass	3850	9.7	23.4	41	54.5	76.0	72
Olallie Meadows	4030	28.0	38.6	73	79.7	111.2	72
Blewett Pass	4240	-M	0.0	*	27.8	29.2	95
Sasse Ridge	4340	0.0	13.4	0	40.1	53.0	76
Grouse Camp	5390	-M	0.2	*	24.3	28.8	84
Trough	5480	-M	0.0	*	24.0	22.9	105
Basin Index (%)		45			78
NACHES
White Pass E.S.	4440	6.7	10.2	66	38.8	40.8	95
Bumping Ridge	4610	0.8	13.8	6	53.0	55.9	95
Sawmill Ridge	4640	0.1	22.0₍₁₄₎	0	41.6	63.6₍₁₄₎	65
Cayuse Pass	5240	23.0	47.0₍₁₄₎	49	-M	82.5₍₁₁₎	*
Morse Lake	5410	40.4	46.9	86	68.5	76.8	89
Corral Pass	5800	15.4	32.5₍₂₉₎	47	33.7	52.4₍₂₉₎	64
Pigtail Peak	5800	34.2	52.0	66	54.2	74.6	73
Green Lake	5920	6.1	13.2	46	31.2	33.2	94
Basin Index (%)		53			81
LOWER YAKIMA
Satus Pass	3960	0.0	N/A	*	29.8	N/A	*
Lost Horse	5120	0.0	0.0	*	15.8	28.3	56
Indian Rock	5360	-M	0.0₍₁₂₎	*	35.1	45.2₍₁₂₎	78
Green Lake	5920	6.1	13.2	46	31.2	33.2	94
Basin Index (%)		46*			77
KLICKITAT
Satus Pass	3960	0.0	N/A	*	29.8	N/A	*
Potato Hill	4510	16.2	12.6	129	56.2	57.9	97
Lost Horse	5120	0.0	0.0	*	15.8	28.3	56
Indian Rock	5360	-M	0.0₍₁₂₎	*	35.1	45.2₍₁₂₎	78
Green Lake	5920	6.1	13.2	46	31.2	33.2	94
Basin Index (%)		86			84
LOWER SNAKE, WALLA WALLA
Sourdough Gulch	4000	0.1	0.0₍₂₀₎	*	10.6	13.6₍₂₀₎	78
Bowman Springs	4530	-M	0.0	*	22.2	21.4	104
County Line	4830	0.7	0.0	*	17.0	17.2	99
High Ridge	4920	4.5	0.0	*	41.8	44.4	94
Beaver Reservoir	5150	-M	0.0	*	23.0	23.8	97
Schneider Meadows	5400	4.2	5.7	74	37.1	41.2	90
Touchet	5530	0.0	7.7	0	39.2	49.4	79
Milk Shakes	5580	23.8	26.1₍₁₃₎	91	57.3	64.9₍₁₃₎	88
Wolf Creek	5630	-M	0.0	*	24.0	22.8	105
Spruce Springs	5700	0.0	0.0₍₂₀₎	*	25.1	30.8₍₂₀₎	81
Taylor Green	5740	-M	0.0	*	30.8	31.5	98
Moss Springs	5760	9.7	9.8	99	44.5	42.8	104
Aneroid Lake #2	7400	17.0	22.2	77	30.9	36.0	86
Mt. Howard	7910	9.2	12.4	74	31.8	33.2	96
Basin Index (%)		82*			92
LOWER COLUMBIA
Pepper Creek	2140	-M	0.0₍₁₃₎	*	67.1	58.2₍₁₃₎	115
Calamity	2500	-M	0.0₍₁₂₎	*	97.7	89.4₍₁₂₎	109
Spencer Meadow	3400	0.1	2.4	4*	94.3	88.5	107
June Lake	3440	21.2	17.9	118	155.1	148.3	105
Spirit Lake	3520	0.0	0.0	*	78.2	78.4	100
Skate Creek	3770	3.6	N/A	*	80.1	N/A	*
Lone Pine	3930	25.9	25.9	100	97.8	88.2	111
Sheep Canyon	3990	28.7	20.2	142	143.5	119.6	120
Surprise Lakes	4290	26.0	28.4	92	85.4	92.5	92
Pinto Rock	4440	13.2	N/A	*	59.2	N/A	*
Swift Creek	4440	66.6	55.8₍₁₈₎	119	203.8	139.6₍₁₈₎	146
White Pass E.S.	4440	6.7	10.2	66	38.8	40.8	95
Potato Hill	4510	16.2	12.6	129	56.2	57.9	97
Paradise	5130	54.7	70.1	78	98.2	107.6	91
Cayuse Pass	5240	23.0	47.0₍₁₄₎	49	-M	82.5₍₁₁₎	*
Morse Lake	5410	40.4	46.9	86	68.5	76.8	89
Pigtail Peak	5800	34.2	52.0	66	54.2	74.6	73
Basin Index (%)		88			106
SOUTH PUGET SOUND
Huckleberry Creek	2250	-M	0.0₍₂₃₎	*	29.1	37.7₍₂₃₎	77
Mowich	3160	-M	0.0₍₂₂₎	*	41.2	49.2₍₂₂₎	84
Cougar Mountain	3200	-M	0.0	*	66.1	85.5	77
Meadows Pass	3230	-M	0.6₍₂₇₎	*	-M	87.2₍₂₇₎	*
Skate Creek	3770	3.6	N/A	*	80.1	N/A	*
Rex River	3810	2.9	11.4₍₂₄₎	25	78.6	97.1₍₂₅₎	81
Stampede Pass	3850	9.7	23.4	41	54.5	76.0	72
Lynn Lake	3900	0.1	6.9₍₁₃₎	1	77.3	100.1₍₁₃₎	77
Burnt Mountain	4170	0.0	1.4₍₂₁₎	0*	54.6	63.0₍₂₁₎	87
Sawmill Ridge	4640	0.1	22.0₍₁₄₎	0	41.6	63.6₍₁₄₎	65
Paradise	5130	54.7	70.1	78	98.2	107.6	91
Cayuse Pass	5240	23.0	47.0₍₁₄₎	49	-M	82.5₍₁₁₎	*
Morse Lake	5410	40.4	46.9	86	68.5	76.8	89
Corral Pass	5800	15.4	32.5₍₂₉₎	47	33.7	52.4₍₂₉₎	64
Basin Index (%)		56			80
CENTRAL PUGET SOUND
Mount Gardner	2920	-M	0.0₍₂₇₎	*	69.7	90.5₍₂₇₎	77
Tinkham Creek	2990	0.0	7.1₍₂₇₎	0	72.9	96.6₍₂₇₎	75
Cougar Mountain	3200	-M	0.0	*	66.1	85.5	77
Meadows Pass	3230	-M	0.6₍₂₇₎	*	-M	87.2₍₂₇₎	*
Skookum Creek	3310	0.4	9.2₍₂₄₎	4	106.3	130.4₍₂₄₎	82
Alpine Meadows	3500	23.9	44.1₍₂₆₎	54	123.0	144.8₍₂₆₎	85
Rex River	3810	2.9	11.4₍₂₄₎	25	78.6	97.1₍₂₅₎	81
Stevens Pass	3950	4.5	19.6	23	60.2	82.5	73
Olallie Meadows	4030	28.0	38.6	73	79.7	111.2	72
Basin Index (%)		46			78
NORTH PUGET SOUND
Hozomeen Camp	1690	-M	N/A	*	25.2	36.4₍₁₉₎	69
Elbow Lake	3040	-M	15.7₍₂₅₎	*	103.8	129.6₍₂₅₎	80
Marten Ridge	3520	17.1	45.2₍₁₄₎	38	103.3	133.2₍₁₄₎	78
Beaver Pass	3630	15.1	27.9₍₁₉₎	54	49.3	65.3₍₁₈₎	75
Swamp Creek	3930	-M	0.0₍₂₁₎	*	29.0	39.3₍₂₁₎	74
Wells Creek	4030	14.2	20.7₍₂₄₎	69	58.9	72.3₍₂₅₎	81
Thunder Basin	4320	3.6	16.1	22	51.2	59.8	86
Rainy Pass	4890	10.2	26.4	39	38.0	49.6	77
MF Nooksack	4970	38.5	64.2₍₁₈₎	60	80.2	96.5₍₁₈₎	83
Easy Pass	5270	62.2	89.2₍₁₀₎	70	-M	N/A	*
Brown Top	5830	25.6	56.2₍₁₁₎	46	-M	N/A	*
Lyman Lake	5980	24.8	56.8	44	58.3	69.6	84
Harts Pass	6490	25.0	36.5	68	32.0	44.6	72
Basin Index (%)		54			79
OLYMPIC
Mount Crag	3960	9.4	15.4	61	-M	66.1₍₂₉₎	*
Dungeness	4010	-M	0.0₍₂₁₎	*	-M	39.6₍₂₂₎	*
Buckinghorse	4870	22.3	40.0₍₁₂₎	56	101.3	119.4₍₁₂₎	85
Waterhole	5010	8.9	31.0₍₂₁₎	29	49.5	65.8₍₂₁₎	75
Basin Index (%)		47			81

-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.