Columbia River Basin SNOTEL Snow/Precipitation Update Report

Columbia River Basin 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 10, 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
KOOTENAI RIVER IN MONTANA
Banfield Mountain	5580	0.4	11.0	4	33.5	28.2	119
Bear Mountain	5460	-M	53.4₍₂₉₎	*	77.6	78.0	99
Garver Creek	4250	1.2	0.0	*	23.9	20.0₍₂₄₎	120
Grave Creek	4350	0.0	3.0	0	47.9	34.5	139
Hand Creek	5030	0.0	0.0	*	23.0	19.3	119
Hawkins Lake	6460	13.6	23.2	59	44.3	34.8	127
Poorman Creek	5050	8.4	27.9₍₂₂₎	30	72.9	62.0₍₂₂₎	118
Stahl Peak	6040	33.1	38.7	86	49.2	44.2	111
Basin Index (%)		55			116
FLATHEAD RIVER BASIN
Ashley Divide	4820	-M	N/A	*	15.9	N/A	*
Badger Pass	6870	24.7	32.0₍₂₉₎	77	43.3	36.6₍₂₉₎	118
Bisson Creek	4880	0.0	0.6₍₂₉₎	0*	27.9	20.6₍₂₈₎	135
Blacktail Mtn	5660	0.0	1.8₍₁₀₎	0	17.0	15.8₍₁₀₎	108
Emery Creek	4340	0.0	1.4	0*	34.0	28.6	119
Flattop Mtn.	6280	38.8	45.0	86	64.5	57.8	112
Grave Creek	4350	0.0	3.0	0	47.9	34.5	139
Hand Creek	5030	0.0	0.0	*	23.0	19.3	119
Kraft Creek	4770	0.0	0.0	*	38.6	28.8	134
Many Glacier	4930	0.0	0.0	*	42.4	33.8	125
Moss Peak	6760	41.3	42.1	98	54.8	45.2	121
Noisy Basin	6070	37.7	43.0	88	51.0	51.2	100
North Fork Jocko	6110	-M	40.0	*	57.0	54.0	106
Pike Creek	5930	0.0	N/A	*	42.8	N/A	*
Sleeping Woman	6120	0.6	10.7₍₂₉₎	6	32.9	25.4₍₂₈₎	130
Stahl Peak	6040	33.1	38.7	86	49.2	44.2	111
Stuart Mountain	7270	41.2	32.9₍₂₆₎	125	37.0	35.4₍₂₆₎	105
Basin Index (%)		87			117
UPPER CLARK FORK RIVER BASIN
Barker Lakes	8250	11.3	15.4	73	20.5	20.0	102
Basin Creek	7120	-M	7.6	*	10.3	12.8	80
Black Pine	7170	0.0	6.4	0	19.5	16.3	120
Combination	5620	0.0	0.0	*	13.5	11.2	121
Copper Bottom	5200	0.0	0.0	*	24.4	17.3	141
Copper Camp	6980	23.5	30.1₍₁₇₎	78	47.6	30.2₍₁₇₎	158
Lubrecht Flume	4690	0.0	0.0	*	17.7	12.5	142
Nevada Ridge	7030	12.1	12.4₍₂₆₎	98	24.5	18.2₍₂₆₎	135
N Fk Elk Creek	6180	2.7	5.1	53	22.1	17.4	127
North Fork Jocko	6110	-M	40.0	*	57.0	54.0	106
Peterson Meadows	7190	2.0	10.1	20	18.2	16.2₍₂₂₎	112
Rocker Peak	7960	12.8	15.0	85	19.5	16.2	120
Skalkaho Summit	7260	14.9	19.8	75	30.1	25.8	117
Stuart Mountain	7270	41.2	32.9₍₂₆₎	125	37.0	35.4₍₂₆₎	105
Warm Springs	7840	30.2	22.8	132	34.0	27.0	126
Basin Index (%)		89			120
BITTERROOT
Daly Creek	5780	0.0	0.0	*	-M	15.7	*
Lolo Pass	5280	1.7	14.3	12	42.8	38.3	112
Moose Creek	6170	0.0	3.9	0	23.8	22.4	106
Nez Perce Camp	5670	0.0	5.9	0	29.3	23.6	124
Saddle Mtn.	7890	18.2	22.2	82	25.9	26.0	100
Skalkaho Summit	7260	14.9	19.8	75	30.1	25.8	117
Twelvemile Creek	5530	0.0	0.0	*	47.4	37.6	126
Twin Lakes	6380	27.5	34.2	80	61.1	52.8	116
Basin Index (%)		62			115
LOWER CLARK FORK RIVER BASIN
Hoodoo Basin	6060	40.9	38.7	106	61.4	50.8	121
Humboldt Gulch	4260	-M	0.0	*	-M	41.6	*
Lolo Pass	5280	1.7	14.3	12	42.8	38.3	112
Lookout	5180	0.0	17.2	0	45.9	42.0	109
Poorman Creek	5050	8.4	27.9₍₂₂₎	30	72.9	62.0₍₂₂₎	118
Sleeping Woman	6120	0.6	10.7₍₂₉₎	6	32.9	25.4₍₂₈₎	130
Stuart Mountain	7270	41.2	32.9₍₂₆₎	125	37.0	35.4₍₂₆₎	105
Sunset	5570	0.1	14.6	1	41.3	39.2	105
Basin Index (%)		59			114
IDAHO PANHANDLE REGION
Bear Mountain	5460	-M	53.4₍₂₉₎	*	77.6	78.0	99
Bunchgrass Mdw	5020	2.7	23.2	12	33.9	40.7	83
Humboldt Gulch	4260	-M	0.0	*	-M	41.6	*
Lookout	5180	0.0	17.2	0	45.9	42.0	109
Lost Lake	6090	34.3	50.0	69	72.9	65.0	112
Mica Creek	4480	0.0	6.0	0	43.4	43.2	100
Mosquito Ridge	5270	1.5	26.3₍₂₉₎	6	49.8	48.2	103
Quartz Peak	4710	0.0	5.2	0	38.2	37.2	103
Schweitzer Basin	6090	23.5	44.6	53	43.0	44.8	96
Sherwin	3190	0.0	0.0	*	33.0	31.9₍₂₉₎	103
Sunset	5570	0.1	14.6	1	41.3	39.2	105
Basin Index (%)		33			102
COLUMBIA ABOVE METHOW
Bunchgrass Mdw	5020	2.7	23.2	12	33.9	40.7	83
Harts Pass	6490	44.4	38.7	115	47.9	43.4	110
Moses Mtn	5470	0.0	5.8₍₂₉₎	0	11.5	20.5₍₂₉₎	56
Salmon Meadows	4460	0.0	0.0	*	15.5	14.4	108
Basin Index (%)		70			91
CHELAN, ENTIAT, WENATCHEE
Blewett Pass	4240	0.0	0.0	*	36.0	29.2	123
Lyman Lake	5990	28.2	59.2	48	75.7	68.9	110
Park Creek Ridge	4610	0.3	32.0	1	66.8	60.5	110
Pope Ridge	3590	0.0	0.0	*	37.5	28.8	130
Stevens Pass	3940	0.3	25.8	1	91.3	80.4	114
Trough	5480	0.0	0.0	*	26.3	22.2	118
Upper Wheeler	4330	0.0	0.2	0*	27.6	22.9₍₂₉₎	121
Basin Index (%)		25*			115
YAKIMA, AHTANUM
Bumping Ridge	4600	0.0	18.4	0	71.4	55.5	129
Fish Lake	3440	-M	15.6	*	64.0	55.6	115
Green Lake	5920	0.1	18.1	1	37.7	32.2	117
Grouse Camp	5390	0.0	4.3	0	29.8	28.2	106
Lost Horse	5100	-M	2.3	*	-M	27.3	*
Morse Lake	5400	16.1	50.7	32	69.7	76.0	92
Sasse Ridge	4340	0.0	20.5	0	56.4	52.1	108
White Pass E.S.	4440	0.0	13.6	0	53.1	40.7	130
Basin Index (%)		13			112
SNAKE ABOVE PALISADES
Base Camp	7040	0.0	5.6	0	26.2	23.6	111
Blind Bull Sum	8880	23.1	24.2	95	17.4	20.0	87
Cottonwood Creek	7710	1.1	15.1	7	28.4	29.4	97
East Rim Divide	8010	0.0	1.4	0	12.9	13.2	98
Granite Creek	6770	0.0	5.4	0	22.4	21.3	105
Grassy Lake	7330	5.4	22.6	24	36.0	39.4	91
Gros Ventre Summit	8760	0.0	9.8	0	16.8	14.9	113
Lewis Lake Divide	7880	16.7	29.8	56	43.5	38.4	113
Loomis Park	8240	0.0	7.7	0	18.2	19.5	93
Phillips Bench	8170	12.3	23.6	52	30.7	29.4	104
Salt River Summit	7630	0.0	4.5	0	17.9	18.8	95
Spring Creek Divide	9020	21.7	24.0	90	27.6	26.8	103
Togwotee Pass	9590	19.5	25.8	76	32.0	28.6	112
Two Ocean Plateau	9240	32.6	33.1	98	36.1	30.5	118
Willow Creek	8060	6.5	23.6	28	36.6	39.1	94
Basin Index (%)		54			102
HENRYS FORK, TETON, WILLOW, BLACKFOOT, PORTNEUF
Black Bear	8160	26.7	41.0	65	39.6	41.6	95
Crab Creek	6870	0.3	4.9	6	16.8	17.0	99
Grassy Lake	7330	5.4	22.6	24	36.0	39.4	91
Island Park	6300	0.0	0.0	*	17.4	19.1	91
Lewis Lake Divide	7880	16.7	29.8	56	43.5	38.4	113
Madison Plateau	7710	13.6	22.2	61	30.0	29.6	101
Phillips Bench	8170	12.3	23.6	52	30.7	29.4	104
Pine Creek Pass	6710	0.0	1.2	0*	21.6	24.3	89
Sedgwick Peak	7800	0.0	7.2	0	23.2	24.4	95
Sheep Mtn.	6630	0.0	0.0	*	16.0	18.4	87
Slug Creek Divide	7240	0.0	0.6	0*	23.5	23.8	99
Somsen Ranch	6830	0.0	0.0	*	19.0	19.1	99
Whiskey Creek	6790	3.0	10.4	29	25.4	23.0	110
White Elephant	7670	9.1	22.2	41	31.0	32.6	95
Wildhorse Divide	6480	0.0	4.8	0	20.6	22.1	93
Basin Index (%)		46			98
BIG AND LITTLE WOOD BASINS
Camas Creek Divide	5720	0.0	0.0₍₂₉₎	*	18.5	19.3₍₂₈₎	96
Chocolate Gulch	6310	0.0	0.0₍₂₇₎	*	17.7	16.0₍₂₇₎	111
Dollarhide Summit	8390	14.9	19.8	75	24.8	27.0	92
Galena	7470	0.3	9.2	3	21.4	19.2	111
Galena Summit	8790	8.0	15.8	51	22.1	22.3	99
Garfield R.S.	6580	0.0	0.0	*	17.2	14.7	117
Hyndman	7590	0.0	2.6	0	18.9	17.6	107
Lost-Wood Divide	7870	0.1	10.9	1	23.0	21.2	108
Swede Peak	7640	0.3	7.2	4	19.8	18.6	106
Vienna Mine	8930	25.1	29.6	85	36.9	34.6	107
Basin Index (%)		51			105
BIG AND LITTLE LOST BASINS
Bear Canyon	7920	0.0	10.6	0	24.6	18.6	132
Hilts Creek	8090	0.0	5.8	0	18.0	15.2	118
Lost-Wood Divide	7870	0.1	10.9	1	23.0	21.2	108
Meadow Lake	9190	10.6	14.7	72	22.5	21.2	106
Moonshine	7490	0.0	0.0	*	15.5	14.6	106
Stickney Mill	7440	0.0	0.0	*	15.2	12.2	125
Basin Index (%)		25			115
RAFT, GOOSE, SALMON FALLS, BRUNEAU
Bear Creek	8090	0.0	14.5	0	19.8	26.1	76
Big Bend	6890	0.0	0.0	*	10.8	12.2	89
Bostetter R.S.	7530	0.0	4.8	0	18.0	21.2	85
Howell Canyon	8010	0.1	18.6	1	28.4	31.9	89
Magic Mountain	6940	0.0	7.5	0	16.6	26.4	63
Pole Creek R.S.	8370	0.1	18.2	1	12.7	14.4	88
Seventysix Creek	7360	0.0	0.0	*	12.1	15.8	77
Wilson Creek	7110	0.0	0.0	*	15.9	20.6	77
Basin Index (%)		0			80
WEISER, PAYETTE, BOISE
Atlanta Summit	7570	8.9	23.6	38	35.4	34.8	102
Banner Summit	7040	6.4	18.2	35	35.0	34.0	103
Bear Basin	5350	0.0	8.5	0	27.2	28.0	97
Bear Saddle	6170	0.0	5.2	0	23.0	28.6	80
Big Creek Summit	6550	9.3	22.8	41	38.1	38.4	99
Brundage Reservoir	6280	6.5	20.0	32	42.5	42.7	100
Cozy Cove	5410	0.3	0.0	*	25.1	25.1	100
Deadwood Summit	6990	28.8	33.2	87	47.1	46.0	102
Dollarhide Summit	8390	14.9	19.8	75	24.8	27.0	92
Graham Guard Sta.	5690	0.0	0.0	*	26.1	24.9	105
Jackson Peak	7060	10.1	20.3	50	36.7	36.0	102
Mores Creek Summit	6090	0.0	13.9	0	35.1	39.9	88
Prairie	4800	0.0	0.0	*	17.3	17.4	99
Secesh Summit	6530	6.9	22.2	31	41.9	33.3	126
Puhi Flat	6240	0.0	8.8	0	38.4	36.8	104
Trinity Mtn.	7790	14.5	31.8	46	36.6	41.9	87
Vienna Mine	8930	25.1	29.6	85	36.9	34.6	107
West Branch	5590	0.0	4.9	0	33.4	34.2	98
Basin Index (%)		47			100
OWYHEE MALHEUR
Big Bend	6890	0.0	0.0	*	10.8	12.2	89
Blue Mountain Spring	5880	0.0	0.0	*	23.2	26.4	88
Fawn Creek	7040	0.0	3.0	0	17.7	26.0	68
Jack Creek Upper	7380	0.1	8.4	1	17.1	21.8	78
Jacks Peak	8440	-M	N/A	*	18.9	27.0	70
Lake Creek R.S.	5250	0.0	0.0	*	17.5	20.0	88
Laurel Draw	6680	0.0	0.0	*	16.9	19.6	86
Mud Flat	5750	0.0	0.0	*	8.9	12.7	70
South Mtn.	6650	0.0	0.0	*	23.4	26.6	88
Taylor Canyon	6320	0.0	0.0	*	8.9	9.6	93
Basin Index (%)		1*			81
GRAND RONDE, POWDER, BURNT, IMNAHA
Aneroid Lake #2	7430	9.1	23.6	39	30.0	35.2	85
Beaver Reservoir	5140	0.0	0.0	*	19.9	23.0	87
Bourne	5850	0.0	0.0	*	21.0	25.1	84
County Line	4840	0.6	0.0	*	15.8	16.4	96
Eilertson Meadows	5510	0.1	0.0	*	22.4	22.9	98
Gold Center	5400	0.0	0.0	*	17.1	20.5	83
Moss Springs	5760	5.1	15.6	33	39.0	42.0	93
Mt. Howard	7840	0.0	17.2	0	-M	32.4	*
Schneider Meadows	5400	0.1	11.6	1	30.6	40.4	76
Taylor Green	5730	0.0	2.2	0	24.3	31.0	78
Wolf Creek	5730	0.0	0.4	0*	17.5	22.5	78
Basin Index (%)		21*			85
CLEARWATER AND SALMON
Banner Summit	7040	6.4	18.2	35	35.0	34.0	103
Beagle Springs	8880	0.0	6.8	0	13.6	13.1	104
Bear Basin	5350	0.0	8.5	0	27.2	28.0	97
Big Creek Summit	6550	9.3	22.8	41	38.1	38.4	99
Brundage Reservoir	6280	6.5	20.0	32	42.5	42.7	100
Cool Creek	6320	31.9	44.9	71	55.8	59.7	93
Crater Meadows	5960	30.5	41.2	74	65.1	57.6	113
Darkhorse Lake	8930	33.3	30.8	108	35.6	32.0	111
Deadwood Summit	6990	28.8	33.2	87	47.1	46.0	102
Elk Butte	5680	4.8	27.2	18	41.0	47.9	86
Galena	7470	0.3	9.2	3	21.4	19.2	111
Galena Summit	8790	8.0	15.8	51	22.1	22.3	99
Hemlock Butte	5800	12.5	39.3	32	47.2	N/A	*
Hoodoo Basin	6060	40.9	38.7	106	61.4	50.8	121
Lemhi Ridge	8080	0.1	7.0	1	15.0	15.6	96
Lolo Pass	5280	1.7	14.3	12	42.8	38.3	112
Lost Lake	6090	34.3	50.0	69	72.9	65.0	112
Meadow Lake	9190	10.6	14.7	72	22.5	21.2	106
Mill Creek Summit	8780	17.1	20.7₍₂₉₎	83	21.1	21.4	99
Moonshine	7490	0.0	0.0	*	15.5	14.6	106
Moose Creek	6170	0.0	3.9	0	23.8	22.4	106
Morgan Creek	7620	0.3	0.2	150*	16.8	16.6	101
Mountain Meadows	6340	5.0	15.7	32	30.5	33.8	90
Nez Perce Camp	5670	0.0	5.9	0	29.3	23.6	124
Saddle Mtn.	7890	18.2	22.2	82	25.9	26.0	100
Savage Pass	6170	13.9	20.2	69	41.1	35.7	115
Secesh Summit	6530	6.9	22.2	31	41.9	33.3	126
Shanghi Summit	4590	0.0	7.0	0	48.0	45.8	105
Sherwin	3190	0.0	0.0	*	33.0	31.9₍₂₉₎	103
Puhi Flat	6240	0.0	8.8	0	38.4	36.8	104
Twelvemile Creek	5530	0.0	0.0	*	47.4	37.6	126
Twin Lakes	6380	27.5	34.2	80	61.1	52.8	116
Vienna Mine	8930	25.1	29.6	85	36.9	34.6	107
West Branch	5590	0.0	4.9	0	33.4	34.2	98
Basin Index (%)		59			106
UMATILLA, WALLA WALLA, WILLOW
Arbuckle Mtn	5770	0.0	0.0	*	22.7	27.8	82
Bowman Springs	4550	0.2	0.0	*	18.5	20.5	90
Emigrant Springs	3790	0.0	0.0	*	24.9	28.2	88
High Ridge	4900	0.0	7.0	0	39.5	42.6	93
Touchet	5520	0.0	17.2	0	48.8	49.0	100
Basin Index (%)		1*			92
DESCHUTES, CROOKED, JOHN DAY
Arbuckle Mtn	5770	0.0	0.0	*	22.7	27.8	82
Blue Mountain Spring	5880	0.0	0.0	*	23.2	26.4	88
Cascade Summit	5100	0.0	17.6	0	40.9	55.8	73
Chemult Alternate	4850	0.0	0.0	*	12.9	22.6	57
Derr.	5850	0.0	0.0	*	14.7	22.8	64
Hogg Pass	4800	0.0	0.2₍₁₇₎	0*	47.7	60.6₍₁₇₎	79
Irish Taylor	5540	0.0	32.8	0	41.7	56.2	74
Lucky Strike	4970	0.0	0.0	*	20.0	19.3	104
New Crescent Lake	4910	0.0	0.0	*	-M	33.3	*
Ochoco Meadows	5430	0.0	0.0	*	14.3	21.0	68
Starr Ridge	5240	0.0	0.0	*	12.4	15.6	79
Three Creeks Meadow	5680	0.0	5.1	0	29.0	35.3	82
Tipton	5150	0.0	0.0	*	13.8	18.5	75
Basin Index (%)		0*			77
LOWER COLUMBIA, HOOD RIVER
Madison Butte	5150	0.0	0.0	*	12.5	14.4	87
Blazed Alder	3660	0.0	16.8	0	104.4	109.2	96
Clear Lake	3810	0.0	0.0	*	29.7	35.3	84
Greenpoint	3320	0.0	0.0	*	65.8	64.1	103
North Fork	3070	0.0	3.4	0	132.1	133.8	99
Red Hill	4410	0.2	36.1	1	97.9	100.4	98
Basin Index (%)		0			97
WILLAMETTE
Summit Lake	5610	5.6	39.2	14	44.1	61.0	72
Irish Taylor	5540	0.0	32.8	0	41.7	56.2	74
Cascade Summit	5100	0.0	17.6	0	40.9	55.8	73
Roaring River	4960	0.2	10.6	2	47.9	60.0	80
Holland Meadows	4930	0.0	1.9	0	47.2	66.8	71
Mckenzie	4770	0.0	29.6	0	66.6	84.0	79
Hogg Pass	4800	0.0	0.2₍₁₇₎	0*	47.7	60.6₍₁₇₎	79
Salt Creek Falls	4220	0.1	1.6	6*	46.3	64.4	72
Mud Ridge	4070	0.0	11.3₍₂₉₎	0	59.1	60.6	98
Little Meadows	4020	0.0	9.2	0	86.6	102.0	85
Clear Lake	3810	0.0	0.0	*	29.7	35.3	84
Santiam Jct.	3740	0.0	0.0	*	53.6	65.0	82
Daly Lake	3690	0.0	0.0	*	58.2	69.8	83
Jump Off Joe	3530	0.0	0.0	*	60.9	73.0	83
Peavine Ridge	3420	0.1	0.0	*	-M	54.0	*
Clackamas Lake	3400	0.0	0.0	*	42.5	49.4	86
Saddle Mountain	3090	0.0	0.0	*	86.3	81.6	106
Railroad Overpass	2680	0.1	0.0	*	36.3	45.7	79
Marion Forks	2590	0.0	0.0	*	58.8	66.6	88
Seine Creek	2070	0.0	0.0	*	67.1	62.4	108
Miller Woods	420	0.1	0.0₍₁₄₎	*	46.8	49.4₍₁₄₎	95
Basin Index (%)		4*			84
LEWIS, COWLITZ
June Lake	3440	0.1	25.2	0	142.6	147.3	97
Lone Pine	3940	1.3	29.7	4	83.3	87.6	95
Paradise	5150	28.4	77.2	37	111.5	105.8	105
Pigtail Peak	5800	24.5	52.8	46	72.8	74.2	98
Potato Hill	4480	3.7	18.8	20	54.9	57.2	96
Sheep Canyon	3990	1.9	24.1	8	132.2	117.2	113
Spencer Meadow	3400	0.0	11.1	0	82.4	88.5	93
Spirit Lake	3520	0.0	0.0	*	83.4	76.5	109
Lost Horse	5100	-M	2.3	*	-M	27.3	*
Surprise Lakes	4280	5.8	35.8	16	92.5	91.3	101
Basin Index (%)		24			101
WHITE, GREEN, CEDAR, SKYKOMISH, SNOQUALMI, BAKER, SKAGIT
Corral Pass	5810	14.5	35.3₍₂₉₎	41	53.7	51.3₍₂₉₎	105
Meadows Pass	3230	0.0	8.6₍₂₇₎	0	100.0	85.6₍₂₇₎	117
Mount Gardner	2930	0.0	0.0₍₂₇₎	*	96.0	88.5₍₂₇₎	108
Tinkham Creek	3000	0.0	13.5₍₂₇₎	0	101.5	93.0₍₂₇₎	109
Cougar Mountain	3210	0.2	0.0	*	93.1	84.5	110
Olallie Meadows	4010	6.9	48.3	14	114.4	108.7	105
Rainy Pass	4880	20.5	30.7	67	59.2	49.0	121
Sawmill Ridge	4640	0.0	28.7₍₁₄₎	0	64.8	63.0₍₁₄₎	103
Stampede Pass	3850	0.2	27.6	1	76.9	75.4	102
Thunder Basin	4310	0.0	21.6	0	76.2	59.0	129
Basin Index (%)		20			110

-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.