Western US SNOTEL Snow/Precipitation Update Report

Western US 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 Thursday, February 02, 2023

State River Basin	Snow Water Equivalent		Water Year-to-Date Precipitation
State River Basin	# of Sites	Percent of Median	# of Sites	Percent of Median
ALASKA
ANCHORAGE/SHIP CREEK BASIN	4/4	105	4/4	100
SUSITNA BASIN	2/5	117	4/5	124
NORTHERN KENAI MOUNTAINS	6/7	96	6/7	81
SOUTHERN KENAI	3/6	114	5/6	71
COPPER BASIN	2/3	119	2/3	131
PRINCE WILLIAM SOUND	1/7	103	3/7	97
CHENA BASIN	4/7	127	4/7	112
UPPER TANANA	2/4	175	2/4	128
KOYUKUK BASIN	2/6	99	4/6	108
CENTRAL YUKON BASIN	0/5	*	3/5	125
NORTON SOUND	0/4	*	2/4	107
KUPARUK-SAGAVANIRKTOK RIVER BASIN	0/3	*	3/3	123
NORTHWEST ARCTIC RIVER BASIN	0/1	*	1/1	193
SOUTHEAST ALASKA BASIN	1/3	100	2/3	114
ARIZONA
VERDE RIVER BASIN	8/10	288	8/10	155
SAN FRANCISCO PEAKS	1/1	195	1/1	159
CENTRAL MOGOLLON RIM	3/4	201	3/4	150
LITTLE COLORADO RIVER BASIN	10/11	199	10/11	147
SALT RIVER BASIN	9/10	137	7/10	135
SAN FRANCISCO / UPPER GILA RIVER BASIN	8/8	116	7/8	152
CHUSKA MOUNTAINS	1/2	144	2/2	136
CALIFORNIA
NORTHERN GREAT BASIN	7/8	149	7/8	118
TRUCKEE RIVER	11/12	177	11/12	154
LAKE TAHOE	11/11	187	11/11	175
CARSON RIVER	12/12	231	12/12	208
WALKER RIVER	7/7	249	7/7	222
COLORADO
GUNNISON RIVER BASIN	14/16	144	14/16	131
UPPER COLORADO RIVER BASIN	31/35	130	30/35	119
SOUTH PLATTE RIVER BASIN	21/22	116	21/22	104
LARAMIE AND NORTH PLATTE RIVER BASINS	12/12	134	11/12	121
YAMPA AND WHITE RIVER BASINS	20/22	149	19/22	134
ARKANSAS RIVER BASIN	11/11	81	11/11	88
UPPER RIO GRANDE BASIN	16/20	102	17/20	98
SAN MIGUEL, DOLORES, ANIMAS AND SAN JUAN RIVER BASINS	19/21	139	19/21	125
IDAHO
NORTHERN PANHANDLE REGION	9/10	85	8/10	77
COEUR D'ALENE-ST. JOE RIVER BASIN	7/7	90	7/7	74
CLEARWATER BASIN	16/16	91	16/16	76
SALMON BASIN	19/20	101	19/20	89
WEISER BASIN	3/4	112	3/4	92
PAYETTE BASIN	11/12	102	10/12	90
BOISE BASIN	9/11	111	10/11	99
BIG WOOD BASIN	8/9	128	8/9	107
LITTLE WOOD BASIN	4/5	133	4/5	126
BIG LOST BASIN	5/5	132	5/5	122
LITTLE LOST	3/3	130	3/3	120
BIRCH, MEDICINE LODGE, BEAVER, CAMAS BASINS	4/4	139	4/4	135
HENRYS FORK, TETON BASINS	8/8	110	8/8	107
SNAKE BASIN ABOVE PALISADES	21/21	104	21/21	97
WILLOW, BLACKFOOT, PORTNEUF BASINS	6/7	149	6/7	132
SNAKE BASIN ABOVE AMERICAN FALLS	29/29	113	29/29	105
RAFT BASIN	2/2	129	2/2	117
GOOSE CREEK BASIN	2/2	124	2/2	104
SALMON FALLS BASIN	4/6	118	4/6	108
BRUNEAU BASIN	5/8	121	5/8	119
OWYHEE BASIN	8/12	129	9/12	113
BEAR RIVER BASIN	21/21	149	21/21	130
MONTANA
KOOTENAI RIVER BASIN	8/8	78	8/8	75
FLATHEAD RIVER BASIN	14/17	98	14/17	87
UPPER CLARK FORK RIVER BASIN	14/14	90	14/14	90
BITTERROOT RIVER BASIN	8/8	82	8/8	75
LOWER CLARK FORK RIVER BASIN	9/9	83	9/9	73
JEFFERSON RIVER BASIN	18/21	104	19/21	106
MADISON RIVER BASIN	11/12	123	11/12	120
GALLATIN RIVER BASIN	7/7	111	7/7	108
MISSOURI HEADWATERS	30/31	111	31/31	110
HELENA VALLEY	4/4	104	4/4	115
SMITH, JUDITH, AND MUSSELSHELL RIVER BASINS	7/9	119	6/9	117
SUN, TETON AND MARIAS RIVER BASINS	5/6	90	5/6	90
MISSOURI MAINSTEM RIVER BASIN	18/21	107	17/21	107
ST. MARYS RIVER BASIN	2/2	79	2/2	76
MILK RIVER BASIN	1/1	169	1/1	139
UPPER YELLOWSTONE RIVER BASIN	20/22	97	21/22	99
WIND RIVER BASIN (WYOMING)	11/13	121	11/13	111
SHOSHONE RIVER BASIN (WYOMING)	6/6	93	6/6	91
BIGHORN RIVER BASIN (WYOMING)	24/26	107	24/26	102
TONGUE RIVER BASIN (WYOMING)	7/7	111	7/7	112
POWDER RIVER BASIN (WYOMING)	7/7	114	7/7	108
LOWER YELLOWSTONE RIVER BASIN	33/35	109	33/35	105
NEVADA
NORTHERN GREAT BASIN	7/8	149	7/8	118
SNAKE RIVER	7/11	122	7/11	114
OWYHEE RIVER	6/10	136	7/10	116
UPPER HUMBOLDT RIVER	9/17	174	10/17	146
LOWER HUMBOLDT RIVER	6/10	168	7/10	145
CLOVER VALLEY & FRANKLIN RIVER	5/7	199	5/7	172
EASTERN NEVADA BASINS	5/14	244	5/14	207
SOUTHERN NEVADA - Spring Mountains	3/3	249	3/3	173
NEW MEXICO
RIO CHAMA RIVER BASIN	4/5	123	3/5	106
UPPER RIO GRANDE BASIN - New Mexico	9/12	90	10/12	101
SANGRE DE CRISTO MOUNTAIN RANGE BASINS	9/11	89	10/11	102
JEMEZ RIVER BASIN	3/4	99	3/4	111
SAN FRANCISCO RIVER BASIN	6/6	126	5/6	153
GILA RIVER BASIN	3/3	99	3/3	155
MIMBRES RIVER BASIN	2/2	104	2/2	150
PECOS RIVER BASIN	3/3	89	3/3	114
SAN JUAN RIVER BASIN	12/13	129	12/13	118
ANIMAS RIVER BASIN	6/7	126	6/7	121
CANADIAN RIVER BASIN	5/7	77	6/7	93
ZUNI/BLUEWATER RIVER BASIN	1/1	141	1/1	164
RIO HONDO BASIN	1/1	33	1/1	149
CHUSKA MOUNTAINS	1/2	144	2/2	136
OREGON
OWYHEE	8/12	129	9/12	113
MALHEUR	2/3	97	3/3	96
GRANDE RONDE, POWDER, BURNT, IMNAHA	19/19	103	19/19	92
UMATILLA, WALLA WALLA, WILLOW	10/10	97	10/10	92
JOHN DAY	13/13	109	13/13	94
UPPER DESCHUTES, CROOKED	13/14	93	13/14	79
HOOD, SANDY, LOWER DESCHUTES	7/10	96	7/10	80
COAST RANGE	2/2	*	2/2	89
WILLAMETTE	20/23	89	20/23	78
ROGUE, UMPQUA	12/13	95	12/13	85
KLAMATH	18/20	106	18/20	91
LAKE COUNTY, GOOSE LAKE	6/7	123	6/7	104
HARNEY	10/12	142	11/12	112
UTAH
RAFT RIVER	2/2	129	2/2	117
BEAR RIVER	25/26	150	25/26	131
WEBER-OGDEN RIVERS	20/23	166	20/23	132
PROVO R.-UTAH LAKE-JORDAN R.	19/25	180	19/25	147
TOOELE VALLEY-VERNON CREEK	3/4	216	3/4	163
NORTHEASTERN UINTAHS	11/13	168	11/13	123
DUCHESNE RIVER	14/15	170	14/15	144
PRICE-SAN RAFAEL	8/14	194	8/14	150
DIRTY DEVIL	5/9	170	5/9	144
SOUTH EASTERN UTAH	5/11	203	5/11	159
UPPER SEVIER RIVER	17/23	181	18/23	151
SAN PITCH RIVER	6/12	190	6/12	146
LOWER SEVIER RIVER	3/5	208	3/5	190
BEAVER RIVER	3/3	187	3/3	158
ESCALANTE RIVER	4/5	179	4/5	138
SOUTHWESTERN UTAH	10/13	222	10/13	185
WASHINGTON
SPOKANE	9/9	93	9/9	78
LOWER PEND OREILLE	4/5	90	4/5	78
UPPER COLUMBIA	7/9	111	6/9	99
CENTRAL COLUMBIA	11/11	86	8/11	86
UPPER YAKIMA	7/7	91	7/7	79
NACHES	8/8	81	7/8	81
LOWER YAKIMA	3/4	95	2/4	107
KLICKITAT	4/5	98	3/5	94
LOWER SNAKE, WALLA WALLA	14/14	100	14/14	92
LOWER COLUMBIA	15/17	102	14/17	88
SOUTH PUGET SOUND	13/14	85	12/14	83
CENTRAL PUGET SOUND	9/9	89	8/9	78
NORTH PUGET SOUND	12/13	79	9/13	73
OLYMPIC	4/4	79	4/4	86
WYOMING
SNAKE RIVER	22/22	104	22/22	96
MADISON HEADWATERS IN WYOMING	4/5	126	4/5	123
YELLOWSTONE HEADWATERS IN WYOMING	11/12	96	11/12	99
WIND RIVER	9/11	121	9/11	111
BIGHORN BASIN	11/11	107	11/11	103
SHOSHONE RIVER	6/6	93	6/6	91
POWDER RIVER	7/7	114	7/7	108
TONGUE RIVER	7/7	111	7/7	112
BELLE FOURCHE	3/3	116	3/3	106
CHEYENNE RIVER BASIN	2/2	106	2/2	104
UPPER N. PLATTE	18/20	134	18/20	121
SWEETWATER	3/3	159	3/3	131
LOWER N. PLATTE	4/4	130	4/4	117
LARAMIE RIVER	6/7	123	7/7	111
S. PLATTE	1/1	77	1/1	92
LITTLE SNAKE RIVER	8/9	154	8/9	136
UPPER GREEN RIVER	14/15	103	13/15	99
LOWER GREEN RIVER	10/12	143	10/12	115
UPPER BEAR RIVER	12/12	144	12/12	127

-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.

Home NRCS USDA Accessibility FOIA Privacy Policy Non-Discrimination Statement

Natural Resources Conservation Service

National Water and Climate Center