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, February 02, 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
KOOTENAI RIVER IN MONTANA
Banfield Mountain	5580	9.4	11.6	81	12.9	17.0	76
Bear Mountain	5460	30.5	35.7	85	34.6	48.2	72
Garver Creek	4250	6.3	6.8	93	10.2	13.4₍₂₄₎	76
Grave Creek	4350	11.0	11.0	100	17.9	22.0	81
Hand Creek	5040	6.6	7.4	89	8.3	12.0	69
Hawkins Lake	6460	14.3	16.6	86	20.0	21.3	94
Poorman Creek	5050	18.6	23.6₍₂₂₎	79	24.8	39.2₍₂₂₎	63
Stahl Peak	6040	21.9	22.0	100	23.1	26.2	88
Basin Index (%)		88			76
FLATHEAD RIVER BASIN
Ashley Divide	4820	-M	N/A	*	5.6	N/A	*
Badger Pass	6870	13.0	20.7₍₂₉₎	63	13.8	21.2₍₂₉₎	65
Bisson Creek	4880	5.4	6.1₍₂₉₎	89	11.2	10.8₍₂₈₎	104
Blacktail Mtn	5660	6.3	7.9₍₁₀₎	80	7.5	9.6₍₁₀₎	78
Emery Creek	4340	7.3	10.1	72	12.8	17.6	73
Flattop Mtn.	6290	21.2	28.7	74	24.6	35.0	70
Grave Creek	4350	11.0	11.0	100	17.9	22.0	81
Hand Creek	5040	6.6	7.4	89	8.3	12.0	69
Kraft Creek	4760	6.2	8.9	70	13.3	18.4	72
Many Glacier	4930	5.1	9.2	55	12.5	20.8	60
Moss Peak	6760	22.8	22.8	100	24.7	24.4	101
Noisy Basin	6070	29.8	27.0	110	29.3	30.1	97
North Fork Jocko	6110	23.9	26.1	92	23.8	34.4	69
Pike Creek	5930	3.0	N/A	*	14.5	N/A	*
Sleeping Woman	6120	7.2	9.9₍₂₉₎	73	10.2	14.8₍₂₈₎	69
Stahl Peak	6040	21.9	22.0	100	23.1	26.2	88
Stuart Mountain	7270	17.2	21.1₍₂₆₎	82	16.6	21.6₍₂₆₎	77
Basin Index (%)		86			78
UPPER CLARK FORK RIVER BASIN
Barker Lakes	8250	6.4	8.1	79	7.8	9.4	83
Basin Creek	7120	4.1	4.6	89	4.7	5.4	87
Black Pine	7170	5.6	6.8	82	6.6	8.4	79
Combination	5620	2.6	3.4	76	3.3	6.6	50
Copper Bottom	5200	5.3	6.2	85	7.8	11.0	71
Copper Camp	6980	12.8	26.8₍₁₇₎	48	12.9	20.3₍₁₇₎	64
Lubrecht Flume	4690	1.9	3.8	50	3.6	7.3	49
Nevada Ridge	7030	6.6	9.8₍₂₆₎	67	7.0	10.8₍₂₆₎	65
N Fk Elk Creek	6180	4.2	7.1	59	5.2	9.0	58
North Fork Jocko	6110	23.9	26.1	92	23.8	34.4	69
Peterson Meadows	7190	6.0	5.8	103	7.1	7.6₍₂₂₎	93
Rocker Peak	7960	6.5	8.6	76	5.9	8.6	69
Skalkaho Summit	7260	10.2	14.2	72	10.5	15.2	69
Stuart Mountain	7270	17.2	21.1₍₂₆₎	82	16.6	21.6₍₂₆₎	77
Warm Springs	7840	11.9	13.0	92	13.0	14.2	92
Basin Index (%)		76			72
BITTERROOT
Daly Creek	5780	5.7	7.0	81	8.0	8.8	91
Lolo Pass	5280	14.0	18.2	77	17.5	24.4	72
Moose Creek	6170	8.4	11.4	74	9.3	13.7	68
Nez Perce Camp	5670	9.0	9.2	98	10.9	14.2	77
Saddle Mtn.	7890	11.8	16.2	73	10.5	14.6	72
Skalkaho Summit	7260	10.2	14.2	72	10.5	15.2	69
Twelvemile Creek	5530	13.0	11.0	118	18.8	23.0	82
Twin Lakes	6390	22.7	26.2	87	26.5	32.6	81
Basin Index (%)		84			76
LOWER CLARK FORK RIVER BASIN
Hoodoo Basin	6060	20.3	25.4	80	25.0	30.8	81
Humboldt Gulch	4260	7.1	8.4₍₂₉₎	85	18.0	26.0	69
Lolo Pass	5280	14.0	18.2	77	17.5	24.4	72
Lookout	5180	13.2	18.6	71	19.2	26.6	72
Poorman Creek	5050	18.6	23.6₍₂₂₎	79	24.8	39.2₍₂₂₎	63
Sleeping Woman	6120	7.2	9.9₍₂₉₎	73	10.2	14.8₍₂₈₎	69
Stuart Mountain	7270	17.2	21.1₍₂₆₎	82	16.6	21.6₍₂₆₎	77
Sunset	5580	11.0	13.8	80	13.8	23.4	59
Basin Index (%)		78			70
IDAHO PANHANDLE REGION
Bear Mountain	5460	30.5	35.7	85	34.6	48.2	72
Bunchgrass Mdw	5020	17.7	17.5	101	20.7	25.5	81
Humboldt Gulch	4260	7.1	8.4₍₂₉₎	85	18.0	26.0	69
Lookout	5180	13.2	18.6	71	19.2	26.6	72
Lost Lake	6090	27.2	33.4	81	31.6	40.0	79
Mica Creek	4480	12.4	15.3₍₂₉₎	81	21.2	28.9₍₂₉₎	73
Mosquito Ridge	5270	18.9	22.6	84	21.5	31.0	69
Quartz Peak	4710	18.0	14.7	122	24.3	23.0	106
Schweitzer Basin	6090	31.8	31.3	102	25.1	27.0	93
Sherwin	3190	3.8	7.7₍₂₉₎	49	15.2	20.3₍₂₉₎	75
Sunset	5580	11.0	13.8	80	13.8	23.4	59
Basin Index (%)		87			77
COLUMBIA ABOVE METHOW
Bunchgrass Mdw	5020	17.7	17.5	101	20.7	25.5	81
Harts Pass	6490	20.5	29.4	70	19.6	27.6	71
Moses Mtn	5470	14.4	9.1₍₂₉₎	158	16.0	11.6₍₂₉₎	138
Salmon Meadows	4460	9.1	6.6	138	10.5	9.4	112
Basin Index (%)		99			90
CHELAN, ENTIAT, WENATCHEE
Blewett Pass	4240	10.5	10.2	103	16.5	19.7	84
Lyman Lake	5990	29.4	39.2	75	37.0	44.6	83
Park Creek Ridge	4610	16.2	32.6	50	33.1	43.0	77
Pope Ridge	3600	13.0	12.6	103	17.4	21.6	81
Stevens Pass	3940	21.8	27.9	78	36.6	53.4	69
Trough	5480	11.6	7.8	149	15.3	14.7	104
Upper Wheeler	4330	8.4	7.8	108	13.3	14.8	90
Basin Index (%)		80			80
YAKIMA, AHTANUM
Bumping Ridge	4600	17.7	18.6	95	30.6	39.4	78
Fish Lake	3430	12.4	20.0	62	25.1	40.6	62
Green Lake	5930	18.2	15.2	120	20.1	21.2	95
Grouse Camp	5390	14.0	13.1	107	17.1	17.9	96
Lost Horse	5100	14.1	12.4	114	15.6	17.0	92
Morse Lake	5400	36.9	37.3	99	45.2	49.4	91
Sasse Ridge	4340	20.5	21.0	98	26.4	36.2	73
White Pass E.S.	4440	19.1	14.8	129	25.0	28.6	87
Basin Index (%)		100			82
SNAKE ABOVE PALISADES
Base Camp	7040	9.7	11.8	82	10.4	13.7	76
Blind Bull Sum	8890	13.2	15.2	87	9.7	11.8	82
Cottonwood Creek	7710	14.2	13.6	104	15.8	15.6	101
East Rim Divide	8010	5.8	7.0	83	5.9	7.5	79
Granite Creek	6770	9.2	10.4	88	9.7	12.6	77
Grassy Lake	7330	15.6	20.5	76	18.5	23.2	80
Gros Ventre Summit	8760	6.1	8.0	76	6.1	7.8	78
Lewis Lake Divide	7880	15.2	19.5	78	17.4	21.6	81
Loomis Park	8240	8.5	9.9	86	8.7	10.6	82
Phillips Bench	8160	13.1	16.0	82	13.4	17.2	78
Salt River Summit	7630	7.0	7.7	91	6.6	9.8	67
Spring Creek Divide	9020	13.0	15.3	85	13.7	15.0	91
Togwotee Pass	9590	12.2	14.7	83	13.5	15.9	85
Two Ocean Plateau	9240	13.4	19.1	70	11.9	16.4	73
Willow Creek	8060	18.5	17.0	109	20.0	21.0	95
Basin Index (%)		85			83
HENRYS FORK, TETON, WILLOW, BLACKFOOT, PORTNEUF
Black Bear	8160	17.8	23.0	77	18.6	23.4	79
Crab Creek	6870	6.2	7.1	87	7.4	9.8	76
Grassy Lake	7330	15.6	20.5	76	18.5	23.2	80
Island Park	6300	8.0	9.4	85	9.2	11.9	77
Lewis Lake Divide	7880	15.2	19.5	78	17.4	21.6	81
Madison Plateau	7710	10.6	14.0	76	12.9	15.4	84
Phillips Bench	8160	13.1	16.0	82	13.4	17.2	78
Pine Creek Pass	6710	9.8	9.9	99	11.1	13.9	80
Sedgwick Peak	7780	10.7	10.8	99	12.8	13.3	96
Sheep Mtn.	6630	7.3	8.5	86	8.1	10.6	76
Slug Creek Divide	7240	9.6	9.0	107	11.8	12.8	92
Somsen Ranch	6830	7.9	8.4	94	9.2	11.0	84
Whiskey Creek	6790	8.0	9.2	87	11.2	12.3	91
White Elephant	7670	12.8	15.1	85	14.0	16.8	83
Wildhorse Divide	6480	13.0	9.3	140	14.3	12.7	113
Basin Index (%)		87			84
BIG AND LITTLE WOOD BASINS
Camas Creek Divide	5720	11.5	9.2₍₂₈₎	125	12.1	12.0₍₂₈₎	101
Chocolate Gulch	6310	7.4	7.3₍₂₇₎	101	7.7	9.7₍₂₇₎	79
Dollarhide Summit	8390	12.8	14.2	90	10.5	16.1	65
Galena	7470	10.1	10.2	99	9.3	11.8	79
Galena Summit	8780	11.5	12.2	94	11.4	12.6	90
Garfield R.S.	6580	5.0	6.2	81	5.4	7.8	69
Hyndman	7590	6.1	6.9	88	6.7	9.6	70
Lost-Wood Divide	7870	10.7	11.4	94	9.3	12.2	76
Swede Peak	7640	6.6	8.4	79	6.8	10.6	64
Vienna Mine	8930	16.7	20.0	84	15.8	20.6	77
Basin Index (%)		93			77
BIG AND LITTLE LOST BASINS
Bear Canyon	7920	7.0	8.2	85	6.3	10.8	58
Hilts Creek	8080	5.1	7.7	66	4.8	8.3	58
Lost-Wood Divide	7870	10.7	11.4	94	9.3	12.2	76
Meadow Lake	9190	7.8	9.6	81	7.8	10.4	75
Moonshine	7490	6.0	6.0	100	6.3	7.8	81
Stickney Mill	7440	4.0	5.1	78	4.1	6.4	64
Basin Index (%)		85			69
RAFT, GOOSE, SALMON FALLS, BRUNEAU
Bear Creek	8090	10.5	11.5	91	11.5	13.4	86
Big Bend	6890	6.6	5.6	118	8.3	7.2	115
Bostetter R.S.	7530	11.9	10.4	114	13.0	12.2	107
Howell Canyon	8010	18.0	15.5	116	17.5	17.8	98
Magic Mountain	6940	14.4	12.7	113	13.3	14.6	91
Pole Creek R.S.	8360	11.5	12.2	94	6.4	7.0	91
Seventysix Creek	7360	9.2	7.0	131	10.2	9.5	107
Wilson Creek	7110	7.7	9.3	83	10.7	11.0	97
Basin Index (%)		107			98
WEISER, PAYETTE, BOISE
Atlanta Summit	7570	20.0	19.2	104	17.9	21.7	82
Banner Summit	7040	16.2	16.2	100	18.2	19.8	92
Bear Basin	5350	12.2	10.8	113	15.7	15.7	100
Bear Saddle	6170	20.3	14.2	143	20.1	15.8	127
Big Creek Summit	6560	19.3	19.4	99	17.4	23.5	74
Brundage Reservoir	6280	19.9	18.0	111	22.7	24.2	94
Cozy Cove	5410	-M	9.6	*	13.9	16.2	86
Deadwood Summit	6990	26.8	24.8	108	22.8	28.2	81
Dollarhide Summit	8390	12.8	14.2	90	10.5	16.1	65
Graham Guard Sta.	5680	10.6	9.2	115	14.0	15.4	91
Jackson Peak	7060	17.4	16.8	104	20.7	21.2	98
Mores Creek Summit	6090	19.9	19.0	105	21.6	23.8	91
Prairie	4800	-M	4.4	*	9.9	10.4	95
Secesh Summit	6520	22.6	18.6	122	23.2	19.0	122
Puhi Flat	6240	15.3	12.8	120	20.8	18.7	111
Trinity Mtn.	7790	22.4	21.8	103	21.9	24.2	90
Vienna Mine	8930	16.7	20.0	84	15.8	20.6	77
West Branch	5590	16.7	13.8	121	22.8	19.8	115
Basin Index (%)		108			93
OWYHEE MALHEUR
Big Bend	6890	6.6	5.6	118	8.3	7.2	115
Blue Mountain Spring	5880	14.4	11.1	130	20.4	16.2	126
Fawn Creek	7040	10.0	10.0	100	13.2	13.4	99
Jack Creek Upper	7380	9.6	9.2	104	11.2	12.4	90
Jacks Peak	8440	-M	N/A	*	13.5	15.2	89
Lake Creek R.S.	5250	12.9	8.4	154	17.1	12.4	138
Laurel Draw	6680	7.8	7.2	108	12.6	11.7	108
Mud Flat	5750	4.9	5.0	98	6.6	6.9	96
South Mtn.	6650	11.6	10.0	116	17.7	14.4	123
Taylor Canyon	6320	1.3	4.2	31	4.8	5.6	86
Basin Index (%)		112			109
GRAND RONDE, POWDER, BURNT, IMNAHA
Aneroid Lake #2	7430	12.5	12.5	100	18.7	18.2	103
Beaver Reservoir	5140	9.8	6.8	144	14.3	13.6	105
Bourne	5850	13.0	9.8	133	19.2	15.7	122
County Line	4840	2.8	3.3	85	-M	9.2	*
Eilertson Meadows	5510	10.7	7.5	143	16.2	12.8	127
Gold Center	5400	12.6	7.2	175	17.5	11.9	147
Moss Springs	5760	-M	15.3	*	-M	24.2	*
Mt. Howard	7840	7.6	9.4	81	17.4	17.0	102
Schneider Meadows	5400	28.0	19.0	147	32.0	24.4	131
Taylor Green	5730	21.2	13.4	158	22.9	18.5	124
Wolf Creek	5730	12.7	10.2	125	15.3	14.0	109
Basin Index (%)		132			119
CLEARWATER AND SALMON
Banner Summit	7040	16.2	16.2	100	18.2	19.8	92
Beagle Springs	8880	4.6	5.4	85	4.4	5.9	75
Bear Basin	5350	12.2	10.8	113	15.7	15.7	100
Big Creek Summit	6560	19.3	19.4	99	17.4	23.5	74
Brundage Reservoir	6280	19.9	18.0	111	22.7	24.2	94
Cool Creek	6310	24.1	28.6₍₂₉₎	84	27.4	36.6₍₂₉₎	75
Crater Meadows	5960	26.3	30.6	86	29.4	36.2	81
Darkhorse Lake	8930	14.2	19.9	71	14.9	18.2	82
Deadwood Summit	6990	26.8	24.8	108	22.8	28.2	81
Elk Butte	5680	20.2	23.8	85	22.6	30.4	74
Galena	7470	10.1	10.2	99	9.3	11.8	79
Galena Summit	8780	11.5	12.2	94	11.4	12.6	90
Hemlock Butte	5800	27.9	30.0	93	20.1	N/A	*
Hoodoo Basin	6060	20.3	25.4	80	25.0	30.8	81
Lemhi Ridge	8080	5.1	7.0	73	6.2	8.4	74
Lolo Pass	5280	14.0	18.2	77	17.5	24.4	72
Lost Lake	6090	27.2	33.4	81	31.6	40.0	79
Meadow Lake	9190	7.8	9.6	81	7.8	10.4	75
Mill Creek Summit	8790	9.3	13.0₍₂₉₎	72	9.3	12.0	78
Moonshine	7490	6.0	6.0	100	6.3	7.8	81
Moose Creek	6170	8.4	11.4	74	9.3	13.7	68
Morgan Creek	7620	6.7	6.8	99	7.9	10.4	76
Mountain Meadows	6340	13.8	14.0	99	16.6	18.0	92
Nez Perce Camp	5670	9.0	9.2	98	10.9	14.2	77
Saddle Mtn.	7890	11.8	16.2	73	10.5	14.6	72
Savage Pass	6170	11.7	16.4	71	16.2	21.0	77
Secesh Summit	6520	22.6	18.6	122	23.2	19.0	122
Shanghi Summit	4590	16.3	17.4	94	23.3	29.3	80
Sherwin	3190	3.8	7.7₍₂₉₎	49	15.2	20.3₍₂₉₎	75
Puhi Flat	6240	15.3	12.8	120	20.8	18.7	111
Twelvemile Creek	5530	13.0	11.0	118	18.8	23.0	82
Twin Lakes	6390	22.7	26.2	87	26.5	32.6	81
Vienna Mine	8930	16.7	20.0	84	15.8	20.6	77
West Branch	5590	16.7	13.8	121	22.8	19.8	115
Basin Index (%)		91			83
UMATILLA, WALLA WALLA, WILLOW
Arbuckle Mtn	5770	17.8	11.4	156	21.3	15.8	135
Bowman Springs	4540	8.0	5.9	136	13.4	12.2	110
Emigrant Springs	3780	2.0	4.0	50	14.9	16.7	89
High Ridge	4900	18.4	16.8	110	24.4	27.2	90
Touchet	5520	19.8	19.8	100	24.2	30.4	80
Basin Index (%)		114			96
DESCHUTES, CROOKED, JOHN DAY
Arbuckle Mtn	5770	17.8	11.4	156	21.3	15.8	135
Blue Mountain Spring	5880	14.4	11.1	130	20.4	16.2	126
Cascade Summit	5100	26.5	19.8	134	40.8	36.7	111
Chemult Alternate	4850	11.6	6.6	176	19.1	14.2	135
Derr.	5850	14.5	9.1	159	17.7	13.2	134
Hogg Pass	4800	12.6	14.3₍₁₇₎	88	35.8	37.9₍₁₇₎	94
Irish Taylor	5540	30.6	20.6	149	-M	34.9	*
Lucky Strike	4970	10.2	5.6	182	17.9	11.5	156
New Crescent Lake	4910	15.6	9.2	170	31.1	22.0	141
Ochoco Meadows	5430	10.8	7.2	150	17.6	13.6	129
Starr Ridge	5240	7.2	5.0	144	12.9	9.4	137
Three Creeks Meadow	5680	12.1	11.9	102	25.8	24.2	107
Tipton	5150	13.8	7.6	182	15.9	11.3	141
Basin Index (%)		142			122
LOWER COLUMBIA, HOOD RIVER
Madison Butte	5150	5.4	3.6	150	9.7	8.2	118
Blazed Alder	3660	11.4	20.2	56	54.3	68.0	80
Clear Lake	3810	5.9	7.6	78	20.8	23.8	87
Greenpoint	3320	11.4	11.3	101	39.6	43.1	92
North Fork	3070	5.3	13.2	40	72.0	87.6	82
Red Hill	4410	27.3	29.6	92	49.5	63.5	78
Basin Index (%)		78			84
WILLAMETTE
Summit Lake	5610	31.6	22.1	143	44.1	37.1	119
Irish Taylor	5540	30.6	20.6	149	-M	34.9	*
Cascade Summit	5100	26.5	19.8	134	40.8	36.7	111
Roaring River	4960	19.3	17.0	114	40.0	37.8	106
Holland Meadows	4930	17.2	11.6	148	41.9	41.8	100
Mckenzie	4770	25.8	25.5	101	48.6	51.2	95
Hogg Pass	4800	12.6	14.3₍₁₇₎	88	35.8	37.9₍₁₇₎	94
Salt Creek Falls	4220	8.8	14.0	63	43.7	41.0	107
Mud Ridge	4070	13.0	16.6₍₂₉₎	78	34.8	40.2	87
Little Meadows	4020	14.2	16.2	88	60.4	63.4	95
Clear Lake	3810	5.9	7.6	78	20.8	23.8	87
Santiam Jct.	3740	6.5	10.9	60	40.8	41.2	99
Daly Lake	3690	0.7	8.0	9	42.5	45.5	93
Jump Off Joe	3530	0.4	7.3	5	44.8	46.5	96
Peavine Ridge	3420	5.6	8.2	68	34.9	34.4	101
Clackamas Lake	3400	7.9	7.9	100	26.2	30.5	86
Saddle Mountain	3090	0.9	0.0	*	53.5	54.0	99
Railroad Overpass	2680	-M	0.0	*	37.3	28.2	132
Marion Forks	2590	0.5	6.4	8	42.7	44.6	96
Seine Creek	2070	0.3	0.0	*	40.8	40.4	101
Miller Woods	420	0.0	0.0₍₁₄₎	*	32.1	34.0₍₁₄₎	94
Basin Index (%)		98			100
LEWIS, COWLITZ
June Lake	3440	25.3	26.4	96	81.1	99.6	81
Lone Pine	3940	27.6	24.6	112	54.5	54.7	100
Paradise	5150	44.4	45.8	97	53.0	68.6	77
Pigtail Peak	5800	30.9	33.0	94	35.5	44.6	80
Potato Hill	4480	25.0	19.8	126	33.8	39.2	86
Sheep Canyon	3990	21.4	22.7	94	82.6	77.8	106
Spencer Meadow	3400	13.6	18.6	73	53.1	60.8	87
Spirit Lake	3520	7.5	3.6	208	47.9	51.2	94
Lost Horse	5100	14.1	12.4	114	15.6	17.0	92
Surprise Lakes	4280	34.5	31.0	111	52.0	59.6	87
Basin Index (%)		103			89
WHITE, GREEN, CEDAR, SKYKOMISH, SNOQUALMI, BAKER, SKAGIT
Corral Pass	5810	20.4	23.3₍₂₉₎	88	22.7	31.1₍₂₉₎	73
Meadows Pass	3230	11.2	18.2₍₂₇₎	62	41.6	57.4₍₂₇₎	72
Mount Gardner	2930	2.7	11.9₍₂₇₎	23	39.4	56.7₍₂₇₎	69
Tinkham Creek	3000	11.5	17.6₍₂₇₎	65	43.8	59.6₍₂₇₎	73
Cougar Mountain	3210	3.0	12.7	24	36.6	51.6	71
Olallie Meadows	4010	27.7	32.0	87	47.1	71.4	66
Rainy Pass	4880	15.8	25.1	63	21.1	34.1	62
Sawmill Ridge	4640	11.7	25.8₍₁₄₎	45	20.5	38.0₍₁₄₎	54
Stampede Pass	3850	15.5	25.2	62	30.9	50.8	61
Thunder Basin	4310	18.0	20.8	87	31.6	41.0	77
Basin Index (%)		65			68

-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.