Colorado SNOTEL Snowpack Update Report

Colorado SNOTEL Snowpack 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 Tuesday, May 21, 2024

Basin Site Name	Elev (ft)	Snow Water Equivalent				Percent of
Basin Site Name	Elev (ft)	Current (in)	Today's Median (in)	Median Peak (in)	Median Peak Date	Today's Median	Median Peak
GUNNISON RIVER BASIN
Butte	10200	2.4	0.2	13.7	Apr 08	1200*	18*
Cochetopa Pass	10061	-M	0.0₍₁₆₎	4.8₍₁₆₎	Mar 29₍₁₆₎	*	*
Columbine Pass	9171	0.3	0.0	18.0	Mar 26	*	2*
Idarado	9812	0.2	0.0	14.4	Apr 06	*	1*
Mc Clure Pass	8774	0.3	0.0	16.6	Apr 04	*	2*
Mesa Lakes	10168	0.8	5.6	19.0	Apr 15	14	4
Overland Res.	9893	0.2	0.0	12.4	Apr 05	*	2*
Park Cone	9621	0.4	0.0	10.4	Apr 09	*	4*
Park Reservoir	9987	13.5	18.2	27.4	Apr 26	74	49
Porphyry Creek	10788	11.8	3.8	17.0	Apr 15	311	69
Red Mountain Pass	11080	13.6	15.0	25.0	Apr 25	91	54
Sargents Mesa	11499	3.8	4.8₍₁₂₎	11.4₍₁₂₎	Apr 13₍₁₂₎	79	33
Schofield Pass	10653	20.0	22.6	35.1	Apr 19	88	57
Slumgullion	11560	0.5	2.8	15.0	Apr 21	18	3
Upper Taylor	10717	4.3	1.2₍₁₁₎	13.6₍₁₁₎	Apr 03₍₁₁₎	358*	32*
Wager Gulch	11132	0.0	N/A	N/A	N/A	*	*
Basin Index (%)		97*
UPPER COLORADO RIVER BASIN
Arapaho Ridge	10976	20.7	19.1₍₁₈₎	25.2₍₁₈₎	May 01₍₁₈₎	108	82
Bear River	9112	1.8	3.6₍₁₆₎	12.0₍₁₆₎	Apr 21₍₁₆₎	50	15
Beaver Ck Village	8565	0.0	0.0₍₁₇₎	11.7₍₁₇₎	Apr 02₍₁₇₎	*	0*
Berthoud Summit	11314	19.1	16.0	23.2	May 03	119	82
Bison Lake	10964	22.4	24.4	26.9	Apr 29	92	83
Buffalo Park	9249	6.4	5.2₍₂₅₎	14.9₍₂₅₎	Apr 14₍₂₅₎	123	43
Chapman Tunnel	10100	8.5	5.7₍₁₃₎	15.4₍₁₃₎	Apr 19₍₁₃₎	149	55
Columbine	9167	3.4	0.4	24.6	Apr 05	850*	14*
Copper Mountain	10523	11.3	7.8	17.4	Apr 26	145	65
Elliot Ridge	10549	21.0	14.0₍₁₁₎	23.2₍₁₁₎	Apr 25₍₁₁₎	150	91
Fool Creek	11156	19.8	N/A	N/A	N/A	*	*
Fremont Pass	11326	21.2	17.8	20.8	May 11	119	102
Grizzly Peak	11139	13.9	8.9	19.6	Apr 21	156	71
High Lonesome	10638	18.5	N/A	N/A	N/A	*	*
Hoosier Pass	11611	18.9	10.4	17.3	Apr 27	182	109
Independence Pass	10598	9.6	5.2	17.4	Apr 18	185	55
Ivanhoe	10541	16.4	7.8₍₂₉₎	17.2₍₂₉₎	Apr 26₍₂₉₎	210	95
Jones Pass	10426	5.9	10.9₍₂₁₎	16.8₍₂₁₎	Apr 27₍₂₁₎	54	35
Kiln	9624	-M	0.0	13.2	Apr 07	*	*
Lake Irene	10682	18.1	16.4	25.4	Apr 26	110	71
Lynx Pass	8919	0.2	0.0	11.5	Apr 04	*	2*
Mc Clure Pass	8774	0.3	0.0	16.6	Apr 04	*	2*
Mccoy Park	9516	0.2	0.0₍₁₈₎	14.6₍₁₈₎	Apr 07₍₁₈₎	*	1*
Mesa Lakes	10168	0.8	5.6	19.0	Apr 15	14	4
Middle Fork Camp	8969	0.1	0.0₍₁₉₎	11.5₍₁₉₎	Apr 04₍₁₉₎	*	1*
Nast Lake	8731	0.0	0.0	8.8	Mar 28	*	0*
North Lost Trail	9219	0.2	0.0	17.4	Apr 04	*	1*
Overland Res.	9893	0.2	0.0	12.4	Apr 05	*	2*
Park Reservoir	9987	13.5	18.2	27.4	Apr 26	74	49
Phantom Valley	9045	0.1	0.0	10.4	Mar 30	*	1*
Schofield Pass	10653	20.0	22.6	35.1	Apr 19	88	57
Stillwater Creek	8880	0.0	N/A	N/A	N/A	*	*
Summit Ranch	9371	-M	0.0	11.4	Apr 09	*	*
Vail Mountain	10310	9.0	11.3	20.8	Apr 27	80	43
Willow Creek Pass	9523	10.2	10.6	16.4	May 03	96	62
Basin Index (%)		113
SOUTH PLATTE RIVER BASIN
Bear Lake	9522	15.7	12.4	19.8	Apr 27	127	79
Berthoud Summit	11314	19.1	16.0	23.2	May 03	119	82
Black Mountain	8980	0.2	0.8₍₁₀₎	12.5₍₁₀₎	Apr 17₍₁₀₎	25*	2*
Buckskin Joe	11166	14.3	8.2₍₂₁₎	12.6₍₂₁₎	May 02₍₂₁₎	174	113
Copeland Lake	8555	0.1	0.0	6.0	Mar 08	*	2*
Deadman Hill	10239	17.1	15.8	21.8	May 04	108	78
Echo Lake	10694	8.2	6.5₍₂₂₎	9.0₍₂₂₎	Apr 29₍₂₂₎	126	91
Hoosier Pass	11611	18.9	10.4	17.3	Apr 27	182	109
Hourglass Lake	9417	0.1	3.0₍₁₂₎	13.0₍₁₂₎	Apr 19₍₁₂₎	3	1
Jackwhacker Gulch	11054	6.4	7.5₍₂₂₎	14.4₍₂₂₎	Apr 25₍₂₂₎	85	44
Joe Wright	10158	18.6	18.8	24.0	May 05	99	78
Lake Eldora	9728	0.0	0.0	14.0	Apr 09	*	0*
Lake Irene	10682	18.1	16.4	25.4	Apr 26	110	71
Long Draw Resv	10008	9.7	12.1₍₁₁₎	18.3₍₁₁₎	Apr 27₍₁₁₎	80	53
Loveland Basin	11427	19.6	19.1₍₂₈₎	24.4₍₂₈₎	May 02₍₂₈₎	103	80
Michigan Creek	10702	9.2	6.2₍₂₂₎	13.2₍₂₂₎	Apr 26₍₂₂₎	148	70
Niwot	9979	8.0	6.6	15.0	Apr 19	121	53
Rough And Tumble	10432	2.8	0.6₍₂₂₎	8.3₍₂₂₎	Apr 24₍₂₂₎	467*	34*
Sawtooth	9676	24.2	N/A	N/A	N/A	*	*
University Camp	10360	18.1	16.1	19.9	May 07	112	91
Wild Basin	9439	14.7	8.9₍₁₅₎	18.6₍₁₅₎	Apr 25₍₁₅₎	165	79
Willow Park	10732	17.9	12.2	21.0	Apr 29	147	85
Basin Index (%)		120
LARAMIE AND NORTH PLATTE RIVER BASINS
Arapaho Ridge	10976	20.7	19.1₍₁₈₎	25.2₍₁₈₎	May 01₍₁₈₎	108	82
Blackhall Mtn	9839	32.1	28.8₍₁₁₎	34.6₍₁₁₎	Apr 27₍₁₁₎	111	93
Columbine	9167	3.4	0.4	24.6	Apr 05	850*	14*
Deadman Hill	10239	17.1	15.8	21.8	May 04	108	78
Joe Wright	10158	18.6	18.8	24.0	May 05	99	78
Never Summer	10323	22.3	19.9₍₁₈₎	23.8₍₁₈₎	May 11₍₁₈₎	112	94
Rawah	9069	2.8	0.4₍₁₈₎	12.2₍₁₈₎	Apr 07₍₁₈₎	700*	23*
Roach	9740	7.0	9.4	17.5	Apr 25	74	40
Tower	10620	43.3	42.2	49.0	May 07	103	88
Whiskey Park	9020	24.1	21.4	30.8	Apr 17	113	78
Willow Creek Pass	9523	10.2	10.6	16.4	May 03	96	62
Zirkel	9338	5.6	9.0₍₁₈₎	28.5₍₁₈₎	Apr 07₍₁₈₎	62	20
Basin Index (%)		106
YAMPA AND WHITE RIVER BASINS
Battle Mountain	7498	0.0	0.0	12.6	Mar 27	*	0*
Bear River	9112	1.8	3.6₍₁₆₎	12.0₍₁₆₎	Apr 21₍₁₆₎	50	15
Bison Lake	10964	22.4	24.4	26.9	Apr 29	92	83
Buffalo Park	9249	6.4	5.2₍₂₅₎	14.9₍₂₅₎	Apr 14₍₂₅₎	123	43
Burro Mountain	9317	0.4	0.8	16.6	Apr 13	50*	2*
Columbine	9167	3.4	0.4	24.6	Apr 05	850*	14*
Crosho	8973	0.1	0.0	12.6	Apr 05	*	1*
Divide Peak	8730	5.8	4.5	21.4	Apr 15	129	27
Dry Lake	8271	5.2	0.5	22.3	Apr 04	1040*	23*
Elk River	8739	0.3	0.0	19.4	Apr 05	*	2*
Elkhead Divide	8800	6.1	N/A	N/A	N/A	*	*
Little Snake River	8928	15.1	12.0₍₁₆₎	29.0₍₁₆₎	Apr 09₍₁₆₎	126	52
Lost Dog	9327	11.4	8.5₍₂₂₎	24.5₍₂₂₎	Apr 10₍₂₂₎	134	47
Lynx Pass	8919	0.2	0.0	11.5	Apr 04	*	2*
Old Battle	9860	32.9	32.6	38.8	May 05	101	85
Rabbit Ears	9411	16.1	14.2	27.9	Apr 21	113	58
Ripple Creek	10350	23.6	20.1	29.3	Apr 25	117	81
Sage Creek Basin	7850	-M	0.0₍₁₉₎	14.8₍₁₉₎	Apr 03₍₁₉₎	*	*
Sandstone RS	8152	0.1	0.0	14.2	Apr 05	*	1*
Tower	10620	43.3	42.2	49.0	May 07	103	88
Trapper Lake	9759	0.2	N/A	N/A	N/A	*	*
Whiskey Park	9020	24.1	21.4	30.8	Apr 17	113	78
Basin Index (%)		112
ARKANSAS RIVER BASIN
Apishapa	10027	0.1	0.0	7.6	Mar 16	*	1*
Brumley	10594	5.2	0.6	11.8	Apr 19	867*	44*
Fremont Pass	11326	21.2	17.8	20.8	May 11	119	102
Glen Cove	11391	5.0	0.6₍₁₆₎	5.7₍₁₆₎	Apr 23₍₁₆₎	833	88
Hayden Pass	10699	4.9	7.5₍₁₃₎	16.3₍₁₃₎	Apr 18₍₁₃₎	65	30
Medano Pass	9668	0.0	0.0₍₂₅₎	7.4₍₂₅₎	Mar 09₍₂₅₎	*	0*
Porphyry Creek	10788	11.8	3.8	17.0	Apr 15	311	69
Saint Elmo	10450	0.1	0.0₍₁₃₎	11.5₍₁₃₎	Apr 09₍₁₃₎	*	1*
South Colony	10868	5.3	10.9₍₂₉₎	20.9₍₂₉₎	Apr 23₍₂₉₎	49	25
Ute Creek	10734	-M	0.0₍₂₀₎	12.4₍₂₀₎	Apr 04₍₂₀₎	*	*
Whiskey Ck	10290	0.0	0.0	11.1	Apr 01	*	0*
Basin Index (%)		130*
UPPER RIO GRANDE BASIN
Beartown	11600	1.0	4.0	23.2	Apr 17	25	4
Cochetopa Pass	10061	-M	0.0₍₁₆₎	4.8₍₁₆₎	Mar 29₍₁₆₎	*	*
Culebra #2	10562	0.3	0.0	14.0	Apr 05	*	2*
Cumbres Trestle	10035	0.1	3.9	26.2	Apr 06	3	0
Grayback	11626	0.1	N/A	N/A	N/A	*	*
Hayden Pass	10699	4.9	7.5₍₁₃₎	16.3₍₁₃₎	Apr 18₍₁₃₎	65	30
Lily Pond	11069	0.1	0.0	14.8	Apr 04	*	1*
Medano Pass	9668	0.0	0.0₍₂₅₎	7.4₍₂₅₎	Mar 09₍₂₅₎	*	0*
Middle Creek	11269	3.1	8.4	19.2	Apr 15	37	16
Moon Pass	11128	0.0	0.0₍₁₂₎	6.8₍₁₂₎	Apr 08₍₁₂₎	*	0*
North Costilla	10598	0.2	0.0	7.0	Mar 20	*	3*
San Antonio Sink	9143	0.0	N/A	N/A	N/A	*	*
Sargents Mesa	11499	3.8	4.8₍₁₂₎	11.4₍₁₂₎	Apr 13₍₁₂₎	79	33
Shuree	10092	0.0	0.0₍₁₀₎	6.0₍₁₀₎	Mar 08₍₁₀₎	*	0*
Slumgullion	11560	0.5	2.8	15.0	Apr 21	18	3
Trinchera	10922	0.2	0.0	11.2	Apr 05	*	2*
Upper Rio Grande	9379	0.0	0.0	6.6	Mar 18	*	0*
Ute Creek	10734	-M	0.0₍₂₀₎	12.4₍₂₀₎	Apr 04₍₂₀₎	*	*
Wager Gulch	11132	0.0	N/A	N/A	N/A	*	*
Wolf Creek Summit	10957	8.0	27.4	35.5	Apr 29	29	23
Basin Index (%)		38*
SAN MIGUEL, DOLORES, ANIMAS AND SAN JUAN RIVER BASINS
Beartown	11600	1.0	4.0	23.2	Apr 17	25	4
Black Mesa	11564	18.6	N/A	N/A	N/A	*	*
Cascade	8880	-M	0.0	12.7	Mar 10	*	*
Cascade #2	9012	0.0	0.0	10.4	Mar 06	*	0*
Columbine Pass	9171	0.3	0.0	18.0	Mar 26	*	2*
Columbus Basin	10781	12.0	14.1₍₂₆₎	25.8₍₂₆₎	Apr 17₍₂₆₎	85	47
El Diente Peak	10217	0.0	0.0	14.6	Apr 04	*	0*
Lizard Head Pass	10193	0.0	0.0	15.2	Apr 05	*	0*
Lone Cone	9755	0.0	0.0	15.2	Apr 01	*	0*
Mancos	10044	0.0	0.0₍₂₆₎	16.3₍₂₆₎	Mar 23₍₂₆₎	*	0*
Mineral Creek	10046	0.1	0.0	15.6	Apr 09	*	1*
Molas Lake	10631	0.1	1.6	22.0	Apr 11	6*	0*
Red Mountain Pass	11080	13.6	15.0	25.0	Apr 25	91	54
Scotch Creek	9195	0.1	0.0	12.0	Mar 18	*	1*
Sharkstooth	10747	0.1	5.8₍₁₆₎	18.8₍₁₆₎	Apr 12₍₁₆₎	2	1
Spud Mountain	10674	0.2	4.2	25.6	Apr 04	5	1
Stump Lakes	11248	3.3	11.2	18.8	Apr 22	29	18
Upper San Juan	10140	-M	11.0	29.7	Apr 09	*	*
Vallecito	10782	0.0	0.0	14.8	Apr 05	*	0*
Weminuche Creek	10749	0.0	0.2₍₁₀₎	16.4₍₁₀₎	Mar 28₍₁₀₎	0*	0*
Wolf Creek Summit	10957	8.0	27.4	35.5	Apr 29	29	23
Basin Index (%)		46*

-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.

The snow water equivalent percent of median (or average) represents the current snow water
equivalent found at selected SNOTEL sites in or near the basin compared to the median (or average) value
for those sites on this day.

The snow water equivalent percent of median (or average) peak represents the current
snow water equivalent at selected SNOTEL sites in or near the basin compared to the median (or average)
of the maximum seasonal values observed each water year for those sites.

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.