Missouri River Basin SNOTEL Snow/Precipitation Update Report

Missouri 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 Thursday, September 18, 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
JEFFERSON RIVER BASIN
Albro Lake	8500	-M	0.0₍₂₄₎	*	-M	36.0₍₂₄₎	*
Barker Lakes	8250	-M	0.0	*	-M	32.4	*
Basin Creek	7120	-M	0.0	*	-M	22.9	*
Beagle Springs	8880	-M	0.0	*	-M	22.4	*
Bloody Dick	7570	-M	0.0	*	-M	24.4	*
Calvert Creek	6410	-M	0.0	*	-M	18.2	*
Clover Meadow	8770	-M	0.0	*	-M	31.5	*
Darkhorse Lake	8930	-M	0.0	*	-M	43.6	*
Divide	7770	-M	0.0	*	-M	23.6	*
Frohner Meadow	6520	-M	0.0	*	-M	22.6	*
Lakeview Ridge	7340	-M	0.0	*	-M	25.1	*
Lemhi Ridge	8080	-M	0.0	*	-M	24.2	*
Lower Twin	7920	-M	0.0	*	-M	38.2	*
Moose Creek	6170	-M	0.0	*	-M	30.1	*
Mule Creek	8300	-M	0.0	*	-M	29.0	*
Peterson Meadows	7190	-M	0.0	*	-M	25.8₍₂₂₎	*
Rocker Peak	7960	-M	0.0	*	-M	28.5	*
Saddle Mtn.	7890	-M	0.0	*	-M	34.9	*
Short Creek	6980	-M	0.0	*	-M	17.6	*
White Elephant	7670	-M	0.0	*	-M	44.4	*
Basin Index (%)		*			*
MADISON RIVER BASIN
Albro Lake	8500	-M	0.0₍₂₄₎	*	-M	36.0₍₂₄₎	*
Beaver Creek	7820	-M	0.0	*	-M	34.5	*
Black Bear	8160	-M	0.0	*	-M	53.6	*
Carrot Basin	9200	-M	0.0	*	-M	45.2	*
Clover Meadow	8770	-M	0.0	*	-M	31.5	*
Lone Mountain	8810	-M	0.0₍₂₉₎	*	-M	32.3₍₂₉₎	*
Lower Twin	7920	-M	0.0	*	-M	38.2	*
Madison Plateau	7710	-M	0.0	*	-M	39.9	*
Tepee Creek	7950	-M	0.0	*	-M	25.3	*
West Yellowstone	6680	-M	0.0	*	-M	23.8₍₂₂₎	*
Whiskey Creek	6790	-M	0.0	*	-M	32.8	*
Basin Index (%)		*			*
GALLATIN RIVER BASIN
Beaver Creek	7820	-M	0.0	*	-M	34.5	*
Brackett Creek	7370	-M	0.0₍₂₆₎	*	-M	46.0₍₂₆₎	*
Carrot Basin	9200	-M	0.0	*	-M	45.2	*
Lick Creek	6880	-M	0.0	*	-M	29.0	*
Lone Mountain	8810	-M	0.0₍₂₉₎	*	-M	32.3₍₂₉₎	*
Sacajawea	6610	-M	0.0₍₂₁₎	*	-M	42.8₍₂₁₎	*
Shower Falls	8060	-M	0.0	*	-M	45.0	*
Basin Index (%)		*			*
MISSOURI HEADWATERS
Albro Lake	8500	-M	0.0₍₂₄₎	*	-M	36.0₍₂₄₎	*
Barker Lakes	8250	-M	0.0	*	-M	32.4	*
Basin Creek	7120	-M	0.0	*	-M	22.9	*
Beagle Springs	8880	-M	0.0	*	-M	22.4	*
Beaver Creek	7820	-M	0.0	*	-M	34.5	*
Black Bear	8160	-M	0.0	*	-M	53.6	*
Bloody Dick	7570	-M	0.0	*	-M	24.4	*
Brackett Creek	7370	-M	0.0₍₂₆₎	*	-M	46.0₍₂₆₎	*
Calvert Creek	6410	-M	0.0	*	-M	18.2	*
Carrot Basin	9200	-M	0.0	*	-M	45.2	*
Clover Meadow	8770	-M	0.0	*	-M	31.5	*
Darkhorse Lake	8930	-M	0.0	*	-M	43.6	*
Divide	7770	-M	0.0	*	-M	23.6	*
Frohner Meadow	6520	-M	0.0	*	-M	22.6	*
Lakeview Ridge	7340	-M	0.0	*	-M	25.1	*
Lemhi Ridge	8080	-M	0.0	*	-M	24.2	*
Lick Creek	6880	-M	0.0	*	-M	29.0	*
Lone Mountain	8810	-M	0.0₍₂₉₎	*	-M	32.3₍₂₉₎	*
Lower Twin	7920	-M	0.0	*	-M	38.2	*
Madison Plateau	7710	-M	0.0	*	-M	39.9	*
Moose Creek	6170	-M	0.0	*	-M	30.1	*
Mule Creek	8300	-M	0.0	*	-M	29.0	*
Peterson Meadows	7190	-M	0.0	*	-M	25.8₍₂₂₎	*
Rocker Peak	7960	-M	0.0	*	-M	28.5	*
Sacajawea	6610	-M	0.0₍₂₁₎	*	-M	42.8₍₂₁₎	*
Saddle Mtn.	7890	-M	0.0	*	-M	34.9	*
Short Creek	6980	-M	0.0	*	-M	17.6	*
Shower Falls	8060	-M	0.0	*	-M	45.0	*
Tepee Creek	7950	-M	0.0	*	-M	25.3	*
West Yellowstone	6680	-M	0.0	*	-M	23.8₍₂₂₎	*
Whiskey Creek	6790	-M	0.0	*	-M	32.8	*
White Elephant	7670	-M	0.0	*	-M	44.4	*
Basin Index (%)		*			*
HEADWATERS MISSOURI MAINSTEM
Boulder Mountain	7890	-M	0.0	*	-M	38.0	*
Frohner Meadow	6520	-M	0.0	*	-M	22.6	*
Nevada Ridge	7030	-M	0.0₍₂₇₎	*	-M	28.2₍₂₆₎	*
Rocker Peak	7960	-M	0.0	*	-M	28.5	*
Tizer Basin	6880	-M	0.0	*	-M	25.0	*
Basin Index (%)		*			*
SMITH, JUDITH, AND MUSSELSHELL RIVER BASINS
Boulder Mountain	7890	-M	0.0	*	-M	38.0	*
Crystal Lake	6130	-M	0.0	*	-M	40.1	*
Daisy Peak	7590	-M	0.0₍₂₅₎	*	-M	25.6₍₂₄₎	*
Deadman Creek	6440	-M	0.0	*	-M	25.8	*
Elk Peak	7600	-M	N/A	*	-M	N/A	*
Pickfoot Creek	6680	-M	N/A	*	-M	N/A	*
Porcupine	6480	-M	0.0	*	-M	24.8	*
Spur Park	8080	-M	0.0	*	-M	32.3	*
Basin Index (%)		*			*
SUN, TETON AND MARIAS RIVER BASINS
Badger Pass	6870	-M	0.0₍₂₉₎	*	-M	47.9₍₂₉₎	*
Dupuyer Creek	5740	-M	0.0	*	-M	26.7	*
Mount Lockhart	6430	-M	0.0	*	-M	39.6	*
Pike Creek	5930	-M	N/A	*	-M	N/A	*
Waldron	5640	-M	0.0	*	-M	28.7	*
Wood Creek	5970	-M	0.0	*	-M	27.0	*
Basin Index (%)		*			*
MISSOURI MAINSTEM RIVER BASIN
Badger Pass	6870	-M	0.0₍₂₉₎	*	-M	47.9₍₂₉₎	*
Boulder Mountain	7890	-M	0.0	*	-M	38.0	*
Crystal Lake	6130	-M	0.0	*	-M	40.1	*
Daisy Peak	7590	-M	0.0₍₂₅₎	*	-M	25.6₍₂₄₎	*
Deadman Creek	6440	-M	0.0	*	-M	25.8	*
Dupuyer Creek	5740	-M	0.0	*	-M	26.7	*
Elk Peak	7600	-M	N/A	*	-M	N/A	*
Frohner Meadow	6520	-M	0.0	*	-M	22.6	*
Mount Lockhart	6430	-M	0.0	*	-M	39.6	*
Nevada Ridge	7030	-M	0.0₍₂₇₎	*	-M	28.2₍₂₆₎	*
Pickfoot Creek	6680	-M	N/A	*	-M	N/A	*
Pike Creek	5930	-M	N/A	*	-M	N/A	*
Porcupine	6480	-M	0.0	*	-M	24.8	*
Rocker Peak	7960	-M	0.0	*	-M	28.5	*
Rocky Boy	4730	-M	0.0	*	-M	24.5₍₂₄₎	*
Spur Park	8080	-M	0.0	*	-M	32.3	*
Tizer Basin	6880	-M	0.0	*	-M	25.0	*
Waldron	5640	-M	0.0	*	-M	28.7	*
Wood Creek	5970	-M	0.0	*	-M	27.0	*
Basin Index (%)		*			*
ST MARY AND MILK RIVER BASINS
Flattop Mtn.	6290	-M	0.0	*	-M	72.6	*
Many Glacier	4930	-M	0.0	*	-M	44.8	*
Rocky Boy	4730	-M	0.0	*	-M	24.5₍₂₄₎	*
Basin Index (%)		*			*
UPPER YELLOWSTONE RIVER BASIN
Beartooth Lake	9360	-M	0.0	*	-M	34.2	*
Box Canyon	6720	-M	0.0	*	-M	23.0	*
Brackett Creek	7370	-M	0.0₍₂₆₎	*	-M	46.0₍₂₆₎	*
Burnt Mtn	5920	-M	0.0₍₂₀₎	*	-M	27.0₍₂₀₎	*
Canyon	7870	-M	0.0	*	-M	26.9₍₂₉₎	*
Cole Creek	7910	-M	0.0	*	-M	28.8	*
East Boulder Mine	6310	-M	0.0₍₁₃₎	*	-M	27.5₍₁₂₎	*
Evening Star	9040	-M	0.0	*	-M	42.9	*
Fisher Creek	9110	-M	0.0	*	-M	51.2	*
Monument Peak	8740	-M	0.0	*	-M	37.0	*
Northeast Entrance	7420	-M	0.0	*	-M	24.0	*
Parker Peak	9420	-M	0.0	*	-M	32.2	*
Placer Basin	8790	-M	0.0	*	-M	35.2	*
Porcupine	6480	-M	0.0	*	-M	24.8	*
S Fork Shields	8090	-M	0.0	*	-M	40.8	*
Sacajawea	6610	-M	0.0₍₂₁₎	*	-M	42.8₍₂₁₎	*
Shower Falls	8060	-M	0.0	*	-M	45.0	*
Sylvan Lake	8440	-M	0.0	*	-M	38.0	*
Sylvan Road	7140	-M	0.0	*	-M	26.5	*
Thumb Divide	7970	-M	0.0	*	-M	28.6	*
Two Ocean Plateau	9240	-M	0.0	*	-M	40.8	*
White Mill	8730	-M	0.0	*	-M	38.7	*
Wolverine	7650	-M	0.0	*	-M	22.0	*
Younts Peak	8340	-M	0.0₍₂₉₎	*	-M	27.0₍₂₈₎	*
Basin Index (%)		*			*
WIND RIVER BASIN
Burroughs Creek	8760	-M	N/A	*	-M	N/A	*
Castle Creek	8410	-M	0.0₍₁₁₎	*	-M	17.8₍₁₀₎	*
Cold Springs	9640	-M	0.0	*	-M	20.1	*
Deer Park	9690	-M	0.0₍₂₃₎	*	-M	29.8₍₂₃₎	*
Hobbs Park	10080	-M	0.0	*	-M	26.2	*
Kirwin	9580	-M	0.0	*	-M	25.7	*
Little Warm	9370	-M	0.0	*	-M	23.6	*
Owl Creek	8990	-M	0.0	*	-M	17.3	*
South Pass	9040	-M	0.0	*	-M	25.4	*
St. Lawrence Alt	8610	-M	N/A	*	-M	N/A	*
Togwotee Pass	9590	-M	0.0	*	-M	37.0	*
Townsend Creek	8720	-M	0.0	*	-M	24.6	*
Younts Peak	8340	-M	0.0₍₂₉₎	*	-M	27.0₍₂₈₎	*
Basin Index (%)		*			*
SHOSHONE BASIN
Blackwater	9840	-M	0.0	*	-M	35.5	*
Evening Star	9040	-M	0.0	*	-M	42.9	*
Marquette	8800	-M	0.0	*	-M	24.5	*
Sylvan Lake	8440	-M	0.0	*	-M	38.0	*
Sylvan Road	7140	-M	0.0	*	-M	26.5	*
Younts Peak	8340	-M	0.0₍₂₉₎	*	-M	27.0₍₂₈₎	*
Basin Index (%)		*			*
BIGHORN BASIN ABOVE YELLOWTAIL DAM
Bald Mtn.	9360	-M	0.0	*	-M	30.0	*
Bear Trap Meadow	8200	-M	0.0	*	-M	19.4	*
Blackwater	9840	-M	0.0	*	-M	35.5	*
Bone Springs Div	9340	-M	0.0	*	-M	29.0	*
Burroughs Creek	8760	-M	N/A	*	-M	N/A	*
Castle Creek	8410	-M	0.0₍₁₁₎	*	-M	17.8₍₁₀₎	*
Cold Springs	9640	-M	0.0	*	-M	20.1	*
Deer Park	9690	-M	0.0₍₂₃₎	*	-M	29.8₍₂₃₎	*
Evening Star	9040	-M	0.0	*	-M	42.9	*
Grave Springs	8560	-M	0.0₍₂₉₎	*	-M	18.8₍₂₈₎	*
Kirwin	9580	-M	0.0	*	-M	25.7	*
Little Warm	9370	-M	0.0	*	-M	23.6	*
Marquette	8800	-M	0.0	*	-M	24.5	*
Middle Powder	7760	-M	0.0	*	-M	20.4	*
Owl Creek	8990	-M	0.0	*	-M	17.3	*
Powder River Pass	9480	-M	0.0	*	-M	26.6	*
Shell Creek	9570	-M	0.0	*	-M	26.2	*
South Pass	9040	-M	0.0	*	-M	25.4	*
St. Lawrence Alt	8610	-M	N/A	*	-M	N/A	*
Sylvan Lake	8440	-M	0.0	*	-M	38.0	*
Sylvan Road	7140	-M	0.0	*	-M	26.5	*
Timber Creek	7910	-M	0.0	*	-M	21.9	*
Togwotee Pass	9590	-M	0.0	*	-M	37.0	*
Townsend Creek	8720	-M	0.0	*	-M	24.6	*
Younts Peak	8340	-M	0.0₍₂₉₎	*	-M	27.0₍₂₈₎	*
Basin Index (%)		*			*
TONGUE RIVER BASIN
Big Goose	8010	-M	0.0₍₂₃₎	*	-M	23.8₍₂₂₎	*
Bone Springs Div	9340	-M	0.0	*	-M	29.0	*
Burgess Junction	7900	-M	0.0	*	-M	24.5	*
Dome Lake	8890	-M	0.0	*	-M	27.6	*
Little Goose	8560	-M	0.0₍₁₁₎	*	-M	27.2₍₁₀₎	*
Sucker Creek	8840	-M	0.0	*	-M	29.6	*
Tie Creek	7050	-M	0.0₍₂₇₎	*	-M	25.4₍₂₆₎	*
Basin Index (%)		*			*
POWDER RIVER BASIN
Bear Trap Meadow	8200	-M	0.0	*	-M	19.4	*
Cloud Peak Reservoir	9830	-M	0.0	*	-M	29.2	*
Grave Springs	8560	-M	0.0₍₂₉₎	*	-M	18.8₍₂₈₎	*
Hansen Sawmill	8360	-M	0.0	*	-M	21.8	*
Middle Powder	7760	-M	0.0	*	-M	20.4	*
Powder River Pass	9480	-M	0.0	*	-M	26.6	*
Soldier Park	8680	-M	0.0₍₁₁₎	*	-M	21.6₍₁₀₎	*
Basin Index (%)		*			*
LOWER YELLOWSTONE RIVER BASIN
Bald Mtn.	9360	-M	0.0	*	-M	30.0	*
Bear Trap Meadow	8200	-M	0.0	*	-M	19.4	*
Big Goose	8010	-M	0.0₍₂₃₎	*	-M	23.8₍₂₂₎	*
Blackwater	9840	-M	0.0	*	-M	35.5	*
Bone Springs Div	9340	-M	0.0	*	-M	29.0	*
Burgess Junction	7900	-M	0.0	*	-M	24.5	*
Burroughs Creek	8760	-M	N/A	*	-M	N/A	*
Castle Creek	8410	-M	0.0₍₁₁₎	*	-M	17.8₍₁₀₎	*
Cloud Peak Reservoir	9830	-M	0.0	*	-M	29.2	*
Cold Springs	9640	-M	0.0	*	-M	20.1	*
Deer Park	9690	-M	0.0₍₂₃₎	*	-M	29.8₍₂₃₎	*
Dome Lake	8890	-M	0.0	*	-M	27.6	*
Evening Star	9040	-M	0.0	*	-M	42.9	*
Grave Springs	8560	-M	0.0₍₂₉₎	*	-M	18.8₍₂₈₎	*
Hansen Sawmill	8360	-M	0.0	*	-M	21.8	*
Hobbs Park	10080	-M	0.0	*	-M	26.2	*
Kirwin	9580	-M	0.0	*	-M	25.7	*
Little Goose	8560	-M	0.0₍₁₁₎	*	-M	27.2₍₁₀₎	*
Little Warm	9370	-M	0.0	*	-M	23.6	*
Marquette	8800	-M	0.0	*	-M	24.5	*
Middle Powder	7760	-M	0.0	*	-M	20.4	*
Owl Creek	8990	-M	0.0	*	-M	17.3	*
Powder River Pass	9480	-M	0.0	*	-M	26.6	*
Shell Creek	9570	-M	0.0	*	-M	26.2	*
Soldier Park	8680	-M	0.0₍₁₁₎	*	-M	21.6₍₁₀₎	*
South Pass	9040	-M	0.0	*	-M	25.4	*
St. Lawrence Alt	8610	-M	N/A	*	-M	N/A	*
Sucker Creek	8840	-M	0.0	*	-M	29.6	*
Sylvan Lake	8440	-M	0.0	*	-M	38.0	*
Sylvan Road	7140	-M	0.0	*	-M	26.5	*
Tie Creek	7050	-M	0.0₍₂₇₎	*	-M	25.4₍₂₆₎	*
Timber Creek	7910	-M	0.0	*	-M	21.9	*
Togwotee Pass	9590	-M	0.0	*	-M	37.0	*
Townsend Creek	8720	-M	0.0	*	-M	24.6	*
Younts Peak	8340	-M	0.0₍₂₉₎	*	-M	27.0₍₂₈₎	*
Basin Index (%)		*			*
BELLE FOURCHE
Cole Canyon	5930	-M	0.0₍₂₁₎	*	-M	24.3₍₂₁₎	*
Blind Park	6900	-M	0.0	*	-M	26.6	*
North Rapid Creek	6150	-M	0.0₍₂₅₎	*	-M	24.4₍₂₄₎	*
Basin Index (%)		*			*
UPPER NORTH PLATTE RIVER BASIN
Arapaho Ridge	10960	-M	0.0₍₁₉₎	*	-M	36.0₍₁₈₎	*
Blackhall Mtn	9830	-M	0.0₍₁₁₎	*	-M	43.1₍₁₁₎	*
Brooklyn Lake	10250	-M	0.0	*	-M	33.8	*
Cinnabar Park	9670	-M	0.0₍₁₇₎	*	-M	34.1₍₁₇₎	*
Columbine	9170	-M	0.0	*	-M	36.6	*
Divide Peak	8700	-M	0.0	*	-M	31.2	*
Joe Wright	10140	-M	0.0	*	-M	42.2	*
Laprele Creek	8370	-M	0.0	*	-M	22.4	*
Little Snake River	8930	-M	0.0₍₁₆₎	*	-M	46.5₍₁₆₎	*
Lost Dog	9340	-M	0.0₍₂₂₎	*	-M	35.0₍₂₂₎	*
Med Bow	10500	-M	N/A	*	-M	N/A	*
Never Summer	10300	-M	0.0₍₁₈₎	*	-M	31.2₍₁₈₎	*
North French Creek	10150	-M	0.0	*	-M	42.2	*
Old Battle	9850	-M	0.0	*	-M	49.7	*
Rabbit Ears	9390	-M	0.0	*	-M	44.4	*
Rawah	9100	-M	0.0₍₁₈₎	*	-M	27.6₍₁₈₎	*
Roach	9710	-M	0.0	*	-M	32.2	*
Sage Creek Basin	7830	-M	0.0₍₁₉₎	*	-M	21.0₍₁₉₎	*
Sand Lake	10080	-M	0.0	*	-M	39.9	*
South Brush Creek	8480	-M	0.0	*	-M	24.6	*
Tower	10610	-M	0.0	*	-M	56.6	*
Webber Springs	9250	-M	0.0	*	-M	39.2	*
Whiskey Park	8950	-M	0.0	*	-M	41.2	*
Willow Creek Pass	9520	-M	0.0	*	-M	25.0	*
Zirkel	9320	-M	0.0₍₁₈₎	*	-M	41.8₍₁₈₎	*
Basin Index (%)		*			*
LOWER N. PLATTE, SWEETWATER & LARAMIE RIVERS
Brooklyn Lake	10250	-M	0.0	*	-M	33.8	*
Casper Mtn.	7940	-M	0.0	*	-M	24.8	*
Deadman Hill	10240	-M	0.0	*	-M	29.3	*
Deer Park	9690	-M	0.0₍₂₃₎	*	-M	29.8₍₂₃₎	*
Laprele Creek	8370	-M	0.0	*	-M	22.4	*
Larsen Creek	8880	-M	0.0₍₁₁₎	*	-M	20.8₍₁₀₎	*
Reno Hill	8410	-M	0.0	*	-M	27.6	*
Roach	9710	-M	0.0	*	-M	32.2	*
South Pass	9040	-M	0.0	*	-M	25.4	*
Windy Peak	7900	-M	0.0	*	-M	21.8	*
Basin Index (%)		*			*
SOUTH PLATTE RIVER BASIN
Bear Lake	9490	-M	0.0	*	-M	33.0	*
Buckskin Joe	11160	-M	0.0₍₂₂₎	*	-M	27.3₍₂₁₎	*
Copeland Lake	8570	-M	0.0	*	-M	27.0	*
Deadman Hill	10240	-M	0.0	*	-M	29.3	*
Echo Lake	10660	-M	0.0₍₂₂₎	*	-M	26.0₍₂₂₎	*
Hoosier Pass	11600	-M	0.0	*	-M	29.1	*
Jackwhacker Gulch	11030	-M	0.0₍₂₂₎	*	-M	29.9₍₂₂₎	*
Joe Wright	10140	-M	0.0	*	-M	42.2	*
Lake Eldora	9700	-M	0.0	*	-M	29.8	*
Lake Irene	10680	-M	0.0	*	-M	34.4	*
Loveland Basin	11410	-M	0.0₍₂₈₎	*	-M	32.2₍₂₈₎	*
Michigan Creek	10700	0.1	0.0₍₂₂₎	*	22.3	28.0₍₂₂₎	80
Niwot	9940	-M	0.0	*	-M	30.2	*
Phantom Valley	9030	-M	0.0	*	-M	23.6	*
Rough And Tumble	10420	-M	0.0₍₂₂₎	*	-M	19.8₍₂₂₎	*
University Camp	10330	-M	0.0	*	-M	35.6	*
Willow Park	10710	-M	0.0	*	-M	36.2	*
Basin Index (%)		*			80*

-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.