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 Friday, August 21, 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	0.0	0.0	*	37.5	34.1	110
Bear Mountain	5460	0.0	0.0	*	84.4	85.7	98
Garver Creek	4250	0.0	0.0	*	28.9	25.0₍₂₄₎	116
Grave Creek	4350	0.0	0.0	*	59.3	45.4	131
Hand Creek	5030	0.0	0.0	*	29.8	25.6	116
Hawkins Lake	6460	0.0	0.0	*	52.6	43.6	121
Poorman Creek	5050	0.0	0.0₍₂₃₎	*	-M	72.2₍₂₂₎	*
Stahl Peak	6040	-M	0.0	*	62.5	59.0	106
Basin Index (%)		*			111
FLATHEAD RIVER BASIN
Ashley Divide	4820	-M	N/A	*	21.9	N/A	*
Badger Pass	6870	0.0	0.0₍₂₉₎	*	59.8	46.3₍₂₉₎	129
Bisson Creek	4880	-M	0.0₍₂₉₎	*	38.6	30.0₍₂₈₎	129
Blacktail Mtn	5660	0.0	0.0₍₁₀₎	*	23.9	22.2₍₁₀₎	108
Emery Creek	4340	0.0	0.0	*	45.3	37.8	120
Flattop Mtn.	6280	0.0	0.0	*	79.3	70.6	112
Grave Creek	4350	0.0	0.0	*	59.3	45.4	131
Hand Creek	5030	0.0	0.0	*	29.8	25.6	116
Kraft Creek	4770	0.0	0.0	*	44.7	35.8	125
Many Glacier	4930	0.0	0.0	*	54.6	42.2	129
Moss Peak	6760	0.0	0.0	*	69.7	58.2	120
Noisy Basin	6070	0.0	0.0	*	70.2	66.0	106
North Fork Jocko	6110	0.0	0.0	*	68.5	64.2	107
Pike Creek	5930	0.0	N/A	*	52.2	N/A	*
Sleeping Woman	6120	0.0	0.0₍₂₉₎	*	43.6	33.6₍₂₈₎	130
Stahl Peak	6040	-M	0.0	*	62.5	59.0	106
Stuart Mountain	7270	0.0	0.0₍₂₆₎	*	47.5	46.3₍₂₆₎	103
Basin Index (%)		*			117
UPPER CLARK FORK RIVER BASIN
Barker Lakes	8250	0.0	0.0	*	30.2	30.0	101
Basin Creek	7120	1.0	0.0	*	-M	21.6	*
Black Pine	7170	0.0	0.0	*	29.0	23.6	123
Combination	5620	0.0	0.0	*	19.7	18.0	109
Copper Bottom	5200	0.0	0.0	*	-M	22.5	*
Copper Camp	6980	0.0	0.0₍₁₇₎	*	57.9	37.7₍₁₇₎	154
Lubrecht Flume	4690	0.0	0.0	*	27.5	18.6	148
Nevada Ridge	7030	0.0	0.0₍₂₇₎	*	32.7	26.5₍₂₆₎	123
N Fk Elk Creek	6180	0.0	0.0	*	31.3	24.4	128
North Fork Jocko	6110	0.0	0.0	*	68.5	64.2	107
Peterson Meadows	7190	0.0	0.0	*	28.7	24.2₍₂₂₎	119
Rocker Peak	7960	0.0	0.0	*	-M	27.2	*
Skalkaho Summit	7260	0.1	0.0	*	37.2	34.4	108
Stuart Mountain	7270	0.0	0.0₍₂₆₎	*	47.5	46.3₍₂₆₎	103
Warm Springs	7840	0.0	0.0	*	44.9	37.8	119
Basin Index (%)		*			118
BITTERROOT
Daly Creek	5780	0.1	0.0	*	28.7	23.0	125
Lolo Pass	5280	-M	0.0	*	49.4	44.0	112
Moose Creek	6170	0.0	0.0	*	30.6	29.2	105
Nez Perce Camp	5670	0.0	0.0	*	36.4	30.5	119
Saddle Mtn.	7890	0.0	0.0	*	31.5	34.2	92
Skalkaho Summit	7260	0.1	0.0	*	37.2	34.4	108
Twelvemile Creek	5530	0.0	0.0	*	55.1	44.0	125
Twin Lakes	6380	0.0	0.0	*	72.2	61.2	118
Basin Index (%)		*			114
LOWER CLARK FORK RIVER BASIN
Hoodoo Basin	6060	0.0	0.0	*	-M	59.0	*
Humboldt Gulch	4260	-M	0.0	*	-M	49.6	*
Lolo Pass	5280	-M	0.0	*	49.4	44.0	112
Lookout	5180	0.0	0.0	*	49.9	47.4	105
Poorman Creek	5050	0.0	0.0₍₂₃₎	*	-M	72.2₍₂₂₎	*
Sleeping Woman	6120	0.0	0.0₍₂₉₎	*	43.6	33.6₍₂₈₎	130
Stuart Mountain	7270	0.0	0.0₍₂₆₎	*	47.5	46.3₍₂₆₎	103
Sunset	5570	0.0	0.0	*	48.7	48.7	100
Basin Index (%)		*			109
IDAHO PANHANDLE REGION
Bear Mountain	5460	0.0	0.0	*	84.4	85.7	98
Bunchgrass Mdw	5020	0.0	0.0	*	41.0	51.7	79
Humboldt Gulch	4260	-M	0.0	*	-M	49.6	*
Lookout	5180	0.0	0.0	*	49.9	47.4	105
Lost Lake	6090	0.0	0.0	*	80.0	74.4	108
Mica Creek	4480	0.0	0.0	*	48.5	51.2	95
Mosquito Ridge	5270	0.1	0.0	*	55.3	55.0	101
Quartz Peak	4710	0.0	0.0	*	41.5	47.0	88
Schweitzer Basin	6090	0.0	0.0	*	48.5	51.2	95
Sherwin	3190	-M	0.0	*	36.6	37.5₍₂₉₎	98
Sunset	5570	0.0	0.0	*	48.7	48.7	100
Basin Index (%)		*			97
COLUMBIA ABOVE METHOW
Bunchgrass Mdw	5020	0.0	0.0	*	41.0	51.7	79
Harts Pass	6490	0.0	0.0	*	50.5	49.2	103
Moses Mtn	5470	0.0	0.0₍₂₉₎	*	15.8	25.9₍₂₉₎	61
Salmon Meadows	4460	-M	0.0	*	16.9	20.2	84
Basin Index (%)		*			84
CHELAN, ENTIAT, WENATCHEE
Blewett Pass	4240	0.0	0.0	*	-M	32.2	*
Lyman Lake	5990	0.0	0.0	*	79.7	76.8	104
Park Creek Ridge	4610	0.1	0.0	*	70.7	63.2₍₂₉₎	112
Pope Ridge	3590	-M	0.0	*	-M	32.8	*
Stevens Pass	3940	0.0	0.0	*	-M	86.6	*
Trough	5480	0.0	0.0	*	-M	25.8	*
Upper Wheeler	4330	0.2	0.0	*	-M	26.0₍₂₉₎	*
Basin Index (%)		*			107*
YAKIMA, AHTANUM
Bumping Ridge	4600	0.0	0.0	*	77.4	59.5	130
Fish Lake	3440	-M	0.0	*	68.0	60.5	112
Green Lake	5920	0.0	0.0	*	39.6	35.9	110
Grouse Camp	5390	-M	0.0	*	-M	32.4	*
Lost Horse	5100	-M	0.0	*	-M	31.0	*
Morse Lake	5400	0.0	0.0	*	77.1	81.8	94
Sasse Ridge	4340	0.0	0.0	*	59.4	55.8	106
White Pass E.S.	4440	-M	0.0	*	-M	43.2	*
Basin Index (%)		*			110
SNAKE ABOVE PALISADES
Base Camp	7040	0.0	0.0	*	30.2	29.0	104
Blind Bull Sum	8880	0.0	0.0	*	-M	26.7	*
Cottonwood Creek	7710	0.0	0.0	*	34.6	36.8	94
East Rim Divide	8010	0.0	0.0	*	-M	18.4	*
Granite Creek	6770	0.0	0.0	*	27.5	28.5	96
Grassy Lake	7330	-M	0.0	*	-M	47.6	*
Gros Ventre Summit	8760	-M	0.0	*	-M	20.3	*
Lewis Lake Divide	7880	0.0	0.0	*	50.4	45.4	111
Loomis Park	8240	0.0	0.0	*	-M	25.6	*
Phillips Bench	8170	0.0	0.0	*	37.2	37.4	99
Salt River Summit	7630	0.0	0.0	*	21.2	23.4	91
Spring Creek Divide	9020	0.1	0.0	*	-M	33.6	*
Togwotee Pass	9590	0.0	0.0	*	40.5	35.2	115
Two Ocean Plateau	9240	0.0	0.0	*	43.2	39.2	110
Willow Creek	8060	0.2	0.0	*	43.6	48.3	90
Basin Index (%)		*			102
HENRYS FORK, TETON, WILLOW, BLACKFOOT, PORTNEUF
Black Bear	8160	0.0	0.0	*	51.1	51.1	100
Crab Creek	6870	0.0	0.0	*	25.5	24.3	105
Grassy Lake	7330	-M	0.0	*	-M	47.6	*
Island Park	6300	0.0	0.0	*	24.5	26.5	92
Lewis Lake Divide	7880	0.0	0.0	*	50.4	45.4	111
Madison Plateau	7710	0.2	0.0	*	38.4	37.4	103
Phillips Bench	8170	0.0	0.0	*	37.2	37.4	99
Pine Creek Pass	6710	0.2	0.0	*	26.5	30.8	86
Sedgwick Peak	7800	0.0	0.0	*	26.8	29.9	90
Sheep Mtn.	6630	0.0	0.0	*	-M	23.6	*
Slug Creek Divide	7240	0.0	0.0	*	28.3	31.0	91
Somsen Ranch	6830	-M	0.0	*	-M	24.8	*
Whiskey Creek	6790	0.0	0.0	*	33.2	31.0	107
White Elephant	7670	0.0	0.0	*	41.9	42.4	99
Wildhorse Divide	6480	0.0	0.0	*	25.3	26.0	97
Basin Index (%)		*			99
BIG AND LITTLE WOOD BASINS
Camas Creek Divide	5720	0.0	0.0₍₂₉₎	*	19.6	22.6₍₂₈₎	87
Chocolate Gulch	6310	0.0	0.0₍₂₈₎	*	19.2	20.1₍₂₇₎	96
Dollarhide Summit	8390	0.0	0.0	*	25.9	30.6	85
Galena	7470	0.1	0.0	*	24.3	23.8	102
Galena Summit	8790	0.0	0.0	*	27.0	27.4	99
Garfield R.S.	6580	0.0	0.0	*	18.7	18.6	101
Hyndman	7590	0.0	0.0	*	21.2	21.6	98
Lost-Wood Divide	7870	0.0	0.0	*	27.1	26.4	103
Swede Peak	7640	0.2	0.0	*	21.3	22.8	93
Vienna Mine	8930	0.1	0.0	*	40.7	40.6	100
Basin Index (%)		*			96
BIG AND LITTLE LOST BASINS
Bear Canyon	7920	0.2	0.0	*	27.2	24.6	111
Hilts Creek	8090	0.0	0.0	*	23.9	19.6	122
Lost-Wood Divide	7870	0.0	0.0	*	27.1	26.4	103
Meadow Lake	9190	0.0	0.0	*	30.5	28.9	106
Moonshine	7490	0.0	0.0	*	21.8	18.9	115
Stickney Mill	7440	0.0	0.0	*	17.8	17.4	102
Basin Index (%)		*			109
RAFT, GOOSE, SALMON FALLS, BRUNEAU
Bear Creek	8090	0.0	0.0	*	23.4	33.1	71
Big Bend	6890	0.0	0.0	*	12.2	16.6	73
Bostetter R.S.	7530	0.0	0.0	*	22.5	26.8	84
Howell Canyon	8010	0.0	0.0	*	31.5	38.7₍₂₉₎	81
Magic Mountain	6940	0.0	0.0	*	18.6	30.9	60
Pole Creek R.S.	8370	0.0	0.0	*	15.4	20.2	76
Seventysix Creek	7360	-M	0.0	*	-M	19.8	*
Wilson Creek	7110	0.3	0.0	*	18.8	26.6	71
Basin Index (%)		*			74
WEISER, PAYETTE, BOISE
Atlanta Summit	7570	0.1	0.0	*	-M	41.8	*
Banner Summit	7040	0.0	0.0	*	41.1	39.1	105
Bear Basin	5350	0.0	0.0	*	31.4	33.2	95
Bear Saddle	6170	0.0	0.0	*	25.0	31.8	79
Big Creek Summit	6550	0.0	0.0	*	44.6	43.8	102
Brundage Reservoir	6280	0.0	0.0	*	48.1	48.9	98
Cozy Cove	5410	-M	0.0	*	27.7	30.1	92
Deadwood Summit	6990	0.0	0.0	*	52.5	52.0	101
Dollarhide Summit	8390	0.0	0.0	*	25.9	30.6	85
Graham Guard Sta.	5690	0.0	0.0	*	29.5	28.8	102
Jackson Peak	7060	0.0	0.0	*	42.0	42.3	99
Mores Creek Summit	6090	0.0	0.0	*	38.2	43.3	88
Prairie	4800	0.0	0.0	*	18.3	20.2	91
Secesh Summit	6530	0.0	0.0	*	47.7	38.6	124
Puhi Flat	6240	-M	0.0	*	41.6	42.6	98
Trinity Mtn.	7790	0.0	0.0	*	38.8	45.4	85
Vienna Mine	8930	0.1	0.0	*	40.7	40.6	100
West Branch	5590	0.0	0.0	*	37.2	40.4	92
Basin Index (%)		*			97
OWYHEE MALHEUR
Big Bend	6890	0.0	0.0	*	12.2	16.6	73
Blue Mountain Spring	5880	0.0	0.0	*	25.1	31.8	79
Fawn Creek	7040	0.0	0.0	*	19.5	31.2	62
Jack Creek Upper	7380	0.0	0.0	*	20.0	26.5	75
Jacks Peak	8440	-M	N/A	*	23.7	31.3	76
Lake Creek R.S.	5250	0.0	0.0	*	18.8	22.5	84
Laurel Draw	6680	0.0	0.0	*	20.0	24.6	81
Mud Flat	5750	0.0	0.0	*	9.5	15.9	60
South Mtn.	6650	0.0	0.0	*	24.7	31.2	79
Taylor Canyon	6320	0.1	0.0	*	11.2	11.6	97
Basin Index (%)		*			76
GRAND RONDE, POWDER, BURNT, IMNAHA
Aneroid Lake #2	7430	0.1	0.0	*	35.2	43.4	81
Beaver Reservoir	5140	0.0	0.0	*	22.4	29.3	76
Bourne	5850	0.2	0.0	*	23.1	31.2	74
County Line	4840	0.0	0.0	*	19.0	22.2	86
Eilertson Meadows	5510	0.0	0.0	*	24.3	28.9	84
Gold Center	5400	-M	0.0	*	18.7	25.0	75
Moss Springs	5760	0.0	0.0	*	42.7	49.9	86
Mt. Howard	7840	0.0	0.0	*	28.9	42.1	69
Schneider Meadows	5400	0.0	0.0	*	32.4	45.8	71
Taylor Green	5730	0.0	0.0	*	27.6	35.8	77
Wolf Creek	5730	0.2	0.0	*	20.1	27.6	73
Basin Index (%)		*			77
CLEARWATER AND SALMON
Banner Summit	7040	0.0	0.0	*	41.1	39.1	105
Beagle Springs	8880	0.0	0.0	*	20.0	20.9	96
Bear Basin	5350	0.0	0.0	*	31.4	33.2	95
Big Creek Summit	6550	0.0	0.0	*	44.6	43.8	102
Brundage Reservoir	6280	0.0	0.0	*	48.1	48.9	98
Cool Creek	6320	0.1	0.0	*	63.4	67.3	94
Crater Meadows	5960	0.0	0.0	*	75.2	67.9	111
Darkhorse Lake	8930	0.0	0.0	*	44.5	41.8	106
Deadwood Summit	6990	0.0	0.0	*	52.5	52.0	101
Elk Butte	5680	0.0	0.0	*	45.6	55.0	83
Galena	7470	0.1	0.0	*	24.3	23.8	102
Galena Summit	8790	0.0	0.0	*	27.0	27.4	99
Hemlock Butte	5800	0.1	0.0	*	53.5	N/A	*
Hoodoo Basin	6060	0.0	0.0	*	-M	59.0	*
Lemhi Ridge	8080	0.0	0.0	*	21.9	22.4	98
Lolo Pass	5280	-M	0.0	*	49.4	44.0	112
Lost Lake	6090	0.0	0.0	*	80.0	74.4	108
Meadow Lake	9190	0.0	0.0	*	30.5	28.9	106
Mill Creek Summit	8780	0.1	0.0	*	27.3	26.4	103
Moonshine	7490	0.0	0.0	*	21.8	18.9	115
Moose Creek	6170	0.0	0.0	*	30.6	29.2	105
Morgan Creek	7620	0.0	0.0	*	21.9	22.0	100
Mountain Meadows	6340	-M	0.0	*	39.1	41.4	94
Nez Perce Camp	5670	0.0	0.0	*	36.4	30.5	119
Saddle Mtn.	7890	0.0	0.0	*	31.5	34.2	92
Savage Pass	6170	-M	0.0	*	48.7	44.7	109
Secesh Summit	6530	0.0	0.0	*	47.7	38.6	124
Shanghi Summit	4590	0.0	0.0	*	54.6	55.6	98
Sherwin	3190	-M	0.0	*	36.6	37.5₍₂₉₎	98
Puhi Flat	6240	-M	0.0	*	41.6	42.6	98
Twelvemile Creek	5530	0.0	0.0	*	55.1	44.0	125
Twin Lakes	6380	0.0	0.0	*	72.2	61.2	118
Vienna Mine	8930	0.1	0.0	*	40.7	40.6	100
West Branch	5590	0.0	0.0	*	37.2	40.4	92
Basin Index (%)		*			103
UMATILLA, WALLA WALLA, WILLOW
Arbuckle Mtn	5770	-M	0.0	*	23.4	33.6	70
Bowman Springs	4550	0.0	0.0	*	19.9	25.4	78
Emigrant Springs	3790	0.0	0.0	*	26.3	33.8	78
High Ridge	4900	0.0	0.0	*	42.0	50.2	84
Touchet	5520	0.0	0.0	*	52.1	54.2	96
Basin Index (%)		*			83
DESCHUTES, CROOKED, JOHN DAY
Arbuckle Mtn	5770	-M	0.0	*	23.4	33.6	70
Blue Mountain Spring	5880	0.0	0.0	*	25.1	31.8	79
Cascade Summit	5100	0.0	0.0	*	47.8	60.7	79
Chemult Alternate	4850	0.0	0.0	*	-M	25.0	*
Derr.	5850	0.0	0.0	*	17.3	27.7	62
Hogg Pass	4800	0.0	0.0₍₁₇₎	*	52.0	69.1₍₁₇₎	75
Irish Taylor	5540	0.2	0.0	*	47.8	62.9	76
Lucky Strike	4970	0.0	0.0	*	21.3	25.8	83
New Crescent Lake	4910	0.1	0.0	*	28.3	36.4	78
Ochoco Meadows	5430	-M	0.0	*	16.5	24.9	66
Starr Ridge	5240	0.0	0.0	*	13.6	18.6	73
Three Creeks Meadow	5680	0.0	0.0	*	32.9	38.7	85
Tipton	5150	-M	0.0	*	14.6	22.0	66
Basin Index (%)		*			75
LOWER COLUMBIA, HOOD RIVER
Madison Butte	5150	0.0	0.0	*	13.9	18.4	76
Blazed Alder	3660	0.0	0.0	*	116.4	118.3	98
Clear Lake	3810	0.0	0.0	*	33.2	40.6	82
Greenpoint	3320	0.0	0.0	*	70.9	68.8	103
North Fork	3070	0.0	0.0	*	-M	144.6	*
Red Hill	4410	0.0	0.0	*	106.0	108.7	98
Basin Index (%)		*			96
WILLAMETTE
Summit Lake	5610	0.0	0.0₍₂₉₎	*	51.7	69.4₍₂₉₎	74
Irish Taylor	5540	0.2	0.0	*	47.8	62.9	76
Cascade Summit	5100	0.0	0.0	*	47.8	60.7	79
Roaring River	4960	0.5	0.0	*	57.7	66.2	87
Holland Meadows	4930	0.0	0.0	*	53.7	74.0	73
Mckenzie	4770	0.4	0.0	*	73.9	92.8	80
Hogg Pass	4800	0.0	0.0₍₁₇₎	*	52.0	69.1₍₁₇₎	75
Salt Creek Falls	4220	0.4	0.0	*	55.0	70.2	78
Mud Ridge	4070	-M	0.0₍₂₉₎	*	65.2	66.6	98
Little Meadows	4020	0.1	0.0	*	94.6	111.6	85
Clear Lake	3810	0.0	0.0	*	33.2	40.6	82
Santiam Jct.	3740	0.0	0.0	*	58.6	71.2	82
Daly Lake	3690	0.5	0.0	*	63.5	78.6	81
Jump Off Joe	3530	0.0	0.0	*	63.3	82.4	77
Peavine Ridge	3420	0.0	0.0	*	53.8	61.5	87
Clackamas Lake	3400	0.0	0.0	*	45.8	52.8	87
Saddle Mountain	3090	0.0	0.0	*	93.7	87.8	107
Railroad Overpass	2680	0.0	0.0	*	-M	52.6	*
Marion Forks	2590	0.0	0.0	*	68.1	72.8	94
Seine Creek	2070	0.0	0.0	*	70.6	66.9	106
Miller Woods	420	0.0	0.0₍₁₄₎	*	48.9	52.8₍₁₄₎	93
Basin Index (%)		*			85
LEWIS, COWLITZ
June Lake	3440	0.0	0.0	*	152.4	159.6	95
Lone Pine	3940	0.0	0.0	*	89.6	95.2	94
Paradise	5150	0.0	0.0	*	121.2	115.3	105
Pigtail Peak	5800	0.0	0.0	*	79.2	80.1	99
Potato Hill	4480	0.0	0.0	*	61.3	64.1	96
Sheep Canyon	3990	0.0	0.0	*	144.2	133.0	108
Spencer Meadow	3400	0.1	0.0	*	88.8	94.5	94
Spirit Lake	3520	0.0	0.0	*	91.8	87.5	105
Lost Horse	5100	-M	0.0	*	-M	31.0	*
Surprise Lakes	4280	0.0	0.0	*	98.8	99.5₍₂₉₎	99
Basin Index (%)		*			100
WHITE, GREEN, CEDAR, SKYKOMISH, SNOQUALMI, BAKER, SKAGIT
Corral Pass	5810	0.1	0.0	*	59.3	59.3	100
Meadows Pass	3230	0.0	0.0₍₂₇₎	*	109.5	94.6₍₂₇₎	116
Mount Gardner	2930	-M	0.0₍₂₇₎	*	105.3	100.5₍₂₇₎	105
Tinkham Creek	3000	0.0	0.0₍₂₇₎	*	112.7	104.2₍₂₇₎	108
Cougar Mountain	3210	-M	0.0	*	103.2	97.4	106
Olallie Meadows	4010	-M	0.0	*	125.0	120.0	104
Rainy Pass	4880	-M	0.0	*	63.0	53.6	118
Sawmill Ridge	4640	0.0	0.0₍₁₅₎	*	71.3	69.4₍₁₄₎	103
Stampede Pass	3850	0.0	0.0	*	83.2	82.6	101
Thunder Basin	4310	0.0	0.0	*	80.6	67.6₍₂₉₎	119
Basin Index (%)		*			108

-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.