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 Saturday, July 12, 2025

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	*	4/4	108
SUSITNA BASIN	2/5	*	4/5	112
NORTHERN KENAI MOUNTAINS	6/7	*	6/7	119
SOUTHERN KENAI	2/6	*	5/6	124
COPPER BASIN	2/3	*	2/3	93
PRINCE WILLIAM SOUND	1/7	*	3/7	125
CHENA BASIN	4/7	*	5/7	122
UPPER TANANA	2/5	*	2/5	96
KOYUKUK BASIN	0/6	*	4/6	118
CENTRAL YUKON BASIN	0/5	*	3/5	134
NORTON SOUND	0/4	*	1/4	92
KUPARUK-SAGAVANIRKTOK RIVER BASIN	0/3	*	2/3	102
NORTHWEST ARCTIC RIVER BASIN	1/1	*	1/1	58
SOUTHEAST ALASKA BASIN	1/3	*	2/3	111
ARIZONA
VERDE RIVER BASIN	9/10	*	8/10	66
SAN FRANCISCO PEAKS	1/1	*	1/1	76
CENTRAL MOGOLLON RIM	4/4	*	4/4	54
LITTLE COLORADO RIVER BASIN	11/11	*	11/11	61
SALT RIVER BASIN	7/10	*	8/10	41
SAN FRANCISCO / UPPER GILA RIVER BASIN	7/8	*	7/8	44
CHUSKA MOUNTAINS	2/2	*	2/2	69
CALIFORNIA
NORTHERN GREAT BASIN	7/8	*	7/8	107
TRUCKEE RIVER	11/12	*	11/12	95
LAKE TAHOE	11/11	*	11/11	95
CARSON RIVER	11/13	*	12/13	90
WALKER RIVER	7/8	*	7/8	89
COLORADO
GUNNISON RIVER BASIN	15/18	*	14/18	82
UPPER COLORADO RIVER BASIN	32/36	*	32/36	84
SOUTH PLATTE RIVER BASIN	20/22	*	20/22	91
LARAMIE AND NORTH PLATTE RIVER BASINS	12/12	*	12/12	89
YAMPA AND WHITE RIVER BASINS	20/22	*	21/22	85
ARKANSAS RIVER BASIN	11/11	*	11/11	92
UPPER RIO GRANDE BASIN	17/22	*	17/22	82
SAN MIGUEL, DOLORES, ANIMAS AND SAN JUAN RIVER BASINS	17/22	*	18/22	80
IDAHO
NORTHERN PANHANDLE REGION	9/10	*	9/10	83
COEUR D'ALENE-ST. JOE RIVER BASIN	6/7	*	7/7	76
CLEARWATER BASIN	12/16	*	13/16	84
SALMON BASIN	18/20	*	16/20	94
WEISER BASIN	4/4	*	3/4	100
PAYETTE BASIN	10/12	*	8/12	102
BOISE BASIN	10/11	*	10/11	98
BIG WOOD BASIN	8/9	*	8/9	89
LITTLE WOOD BASIN	4/5	*	4/5	79
BIG LOST BASIN	5/5	*	5/5	84
LITTLE LOST	3/3	*	3/3	87
BIRCH, MEDICINE LODGE, BEAVER, CAMAS BASINS	4/4	*	4/4	82
HENRYS FORK, TETON BASINS	8/8	*	8/8	88
SNAKE BASIN ABOVE PALISADES	19/21	*	19/21	90
WILLOW, BLACKFOOT, PORTNEUF BASINS	6/7	*	4/7	96
SNAKE BASIN ABOVE AMERICAN FALLS	27/29	*	26/29	90
RAFT BASIN	2/2	*	2/2	88
GOOSE CREEK BASIN	2/2	*	2/2	89
SALMON FALLS BASIN	4/6	*	4/6	89
BRUNEAU BASIN	5/8	*	5/8	91
OWYHEE BASIN	7/12	*	9/12	95
BEAR RIVER BASIN	21/21	*	21/21	90
MONTANA
KOOTENAI RIVER BASIN	8/8	*	8/8	84
FLATHEAD RIVER BASIN	14/17	*	14/17	87
UPPER CLARK FORK RIVER BASIN	14/14	*	14/14	84
BITTERROOT RIVER BASIN	7/8	*	8/8	84
LOWER CLARK FORK RIVER BASIN	9/9	*	9/9	77
JEFFERSON RIVER BASIN	19/21	*	19/21	88
MADISON RIVER BASIN	11/12	*	11/12	88
GALLATIN RIVER BASIN	6/7	*	6/7	89
MISSOURI HEADWATERS	30/31	*	30/31	88
HELENA VALLEY	4/4	*	4/4	90
SMITH, JUDITH, AND MUSSELSHELL RIVER BASINS	7/9	*	7/9	97
SUN, TETON AND MARIAS RIVER BASINS	5/6	*	5/6	69
MISSOURI MAINSTEM RIVER BASIN	18/21	*	18/21	86
ST. MARYS RIVER BASIN	2/2	*	2/2	74
MILK RIVER BASIN	1/1	*	1/1	96
UPPER YELLOWSTONE RIVER BASIN	20/22	*	21/22	91
WIND RIVER BASIN (WYOMING)	10/13	*	11/13	93
SHOSHONE RIVER BASIN (WYOMING)	6/6	*	6/6	89
BIGHORN RIVER BASIN (WYOMING)	23/26	*	24/26	91
TONGUE RIVER BASIN (WYOMING)	7/7	*	4/7	90
POWDER RIVER BASIN (WYOMING)	7/7	*	7/7	90
LOWER YELLOWSTONE RIVER BASIN	32/35	*	30/35	91
NEVADA
NORTHERN GREAT BASIN	7/8	*	7/8	107
SNAKE RIVER	7/11	*	7/11	90
OWYHEE RIVER	5/10	*	7/10	91
UPPER HUMBOLDT RIVER	9/17	*	10/17	97
LOWER HUMBOLDT RIVER	6/10	*	7/10	98
CLOVER VALLEY & FRANKLIN RIVER	5/7	*	5/7	105
EASTERN NEVADA BASINS	5/14	*	4/14	91
SOUTHERN NEVADA - Spring Mountains	3/3	*	3/3	87
NEW MEXICO
RIO CHAMA RIVER BASIN	4/5	*	4/5	75
UPPER RIO GRANDE BASIN - New Mexico	9/12	*	10/12	94
SANGRE DE CRISTO MOUNTAIN RANGE BASINS	10/11	*	10/11	91
JEMEZ RIVER BASIN	2/4	*	3/4	76
SAN FRANCISCO RIVER BASIN	5/6	*	5/6	41
GILA RIVER BASIN	3/3	*	3/3	46
MIMBRES RIVER BASIN	1/2	*	2/2	58
PECOS RIVER BASIN	3/3	*	3/3	95
SAN JUAN RIVER BASIN	11/13	*	11/13	78
ANIMAS RIVER BASIN	5/7	*	5/7	84
CANADIAN RIVER BASIN	6/7	*	6/7	106
ZUNI/BLUEWATER RIVER BASIN	1/1	*	1/1	79
RIO HONDO BASIN	1/1	*	1/1	69
CHUSKA MOUNTAINS	2/2	*	2/2	69
OREGON
OWYHEE	7/12	*	9/12	95
MALHEUR	3/3	*	3/3	116
GRANDE RONDE, POWDER, BURNT, IMNAHA	17/19	*	19/19	92
UMATILLA, WALLA WALLA, WILLOW	10/10	*	10/10	88
JOHN DAY	11/13	*	13/13	110
UPPER DESCHUTES, CROOKED	14/14	*	12/14	106
HOOD, SANDY, LOWER DESCHUTES	9/10	*	9/10	87
COAST RANGE	2/2	*	2/2	98
WILLAMETTE	21/23	*	20/23	98
ROGUE, UMPQUA	11/13	*	9/13	117
KLAMATH	12/20	*	12/20	120
LAKE COUNTY, GOOSE LAKE	4/7	*	5/7	116
HARNEY	10/12	*	11/12	116
UTAH
RAFT RIVER	2/2	*	2/2	88
BEAR RIVER	25/26	*	25/26	89
WEBER-OGDEN RIVERS	18/23	*	20/23	89
PROVO R.-UTAH LAKE-JORDAN R.	18/26	*	18/26	90
TOOELE VALLEY-VERNON CREEK	3/4	*	3/4	83
NORTHEASTERN UINTAHS	10/13	*	11/13	83
DUCHESNE RIVER	13/15	*	14/15	86
PRICE-SAN RAFAEL	8/14	*	8/14	90
DIRTY DEVIL	5/9	*	5/9	87
SOUTH EASTERN UTAH	5/12	*	5/12	69
UPPER SEVIER RIVER	17/23	*	14/23	78
SAN PITCH RIVER	6/12	*	6/12	92
LOWER SEVIER RIVER	3/5	*	2/5	76
BEAVER RIVER	3/3	*	0/3	*
ESCALANTE RIVER	4/5	*	4/5	74
SOUTHWESTERN UTAH	10/13	*	9/13	72
WASHINGTON
SPOKANE	8/9	*	9/9	79
LOWER PEND OREILLE	5/5	*	5/5	83
UPPER COLUMBIA	6/9	*	6/9	75
CENTRAL COLUMBIA	11/11	*	11/11	77
UPPER YAKIMA	7/7	*	7/7	74
NACHES	8/8	*	7/8	81
LOWER YAKIMA	2/4	*	3/4	78
KLICKITAT	3/5	*	4/5	80
LOWER SNAKE, WALLA WALLA	13/14	*	14/14	88
LOWER COLUMBIA	13/17	1*	14/17	93
SOUTH PUGET SOUND	13/14	14*	12/14	76
CENTRAL PUGET SOUND	9/9	*	9/9	76
NORTH PUGET SOUND	12/13	5*	11/13	82
OLYMPIC	4/4	*	4/4	87
WYOMING
SNAKE RIVER	20/22	*	20/22	90
MADISON HEADWATERS IN WYOMING	5/5	*	5/5	84
YELLOWSTONE HEADWATERS IN WYOMING	10/12	*	11/12	91
WIND RIVER	8/11	*	9/11	93
BIGHORN BASIN	11/11	*	11/11	91
SHOSHONE RIVER	6/6	*	6/6	89
POWDER RIVER	7/7	*	7/7	90
TONGUE RIVER	7/7	*	4/7	90
BELLE FOURCHE	3/3	*	3/3	108
CHEYENNE RIVER BASIN	2/2	*	2/2	104
UPPER N. PLATTE	19/20	*	19/20	87
SWEETWATER	3/3	*	3/3	97
LOWER N. PLATTE	4/4	*	4/4	80
LARAMIE RIVER	7/7	*	7/7	85
S. PLATTE	1/1	*	1/1	77
LITTLE SNAKE RIVER	8/9	*	8/9	84
UPPER GREEN RIVER	14/15	*	13/15	91
LOWER GREEN RIVER	10/12	*	10/12	86
UPPER BEAR RIVER	12/12	*	12/12	88

-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.