Wyoming Snow Precipitation Update
United States Natural Resources Water and Climate Center
Department of Conservation Portland, Oregon
Agriculture Service
S N O W - P R E C I P I T A T I O N U P D A T E
Based on Mountain Data from NRCS SNOTEL Sites
As of WEDNESDAY: MAY 1 , 2013
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BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION
Data Site Name (Ft) % %
Current Median Median Current Average Avg
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WYOMING
SNAKE RIVER
BASE CAMP 7030 10.5 9.3 113 21.8 22.8 96
BLACK BEAR 8170 40.0 37.4 107 37.3 41.7 89
BLIND BULL SUM 8650 22.0 23.1 95 16.2 21.3 76
COTTONWOOD CREEK 7670 16.1 15.3 105 26.0 27.5 95
EAST RIM DIVIDE 7930 3.1 8.2 38 10.1 12.9 78
GRAND TARGHEE 9260 41.7 44.8 93 31.0 34.6 90
GRANITE CREEK 6770 8.0 8.3 96 16.7 21.3 78
GRASSY LAKE 7265 24.6 29.1 85 33.9 39.3 86
GROS VENTRE SUMMIT 8750 9.9 11.6 85 12.9 14.6 88
GUNSIGHT PASS 9820 12.5 12.5 100 13.4 16.0 84
LEWIS LAKE DIVIDE 7850 27.7 30.1 92 34.2 38.5 89
PHILLIPS BENCH 8200 24.0 25.4 94 26.8 30.7 87
SALT RIVER SUMMIT 7760 7.4 7.9 94 15.8 18.4 86
SNAKE RIVER STATION 6920 7.9 7.4 107 23.0 24.7 93
SPRING CREEK DIVIDE 9000 25.1 24.3 103 25.0 26.2 95
THUMB DIVIDE 7980 13.0 12.4 105 18.7 20.9 89
TOGWOTEE PASS 9580 22.9 24.7 93 24.7 27.2 91
TWO OCEAN PLATEAU 9240 31.6 29.7 106 27.5 30.1 91
WILLOW CREEK 8380 25.7 23.0 112 34.6 37.5 92
YOUNTS PEAK 8350 13.9 15.5 90 13.4 17.6 76
----- -----
Basin wide percent 97 88
MADISON-GALLATIN
BLACK BEAR 8170 40.0 37.4 107 37.3 41.7 89
CANYON 7870 11.3 10.4 109 14.0 18.0 78
MADISON PLATEAU 7750 20.6 21.3 97 25.7 28.9 89
WEST YELLOWSTONE 6700 .0 1.8 0 14.2 16.0 89
WHISKEY CREEK 6800 9.8 14.6 67 19.1 22.3 86
----- -----
Basin wide percent 96 87
YELLOWSTONE
BEARTOOTH LAKE 9360 19.9 22.8 87 20.2 21.9 92
BURNT MTN 5880 .2 .0 * 12.0 15.9 75
CANYON 7870 11.3 10.4 109 14.0 18.0 78
COLE CREEK 7850 14.5 16.6 87 11.3 16.4 69
EVENING STAR 9200 26.2 24.9 105 30.8 30.4 101
FISHER CREEK 9100 32.9 32.7 101 33.4 35.1 95
NORTHEAST ENTRANCE 7350 3.3 3.0 110 12.5 13.8 91
PARKER PEAK 9400 25.6 21.3 120 23.3 20.0 116
SYLVAN LAKE 8420 17.8 19.8 90 25.3 25.1 101
THUMB DIVIDE 7980 13.0 12.4 105 18.7 20.9 89
TWO OCEAN PLATEAU 9240 31.6 29.7 106 27.5 30.1 91
WHITE MILL 8700 24.7 23.8 104 23.8 26.3 90
WOLVERINE 7650 5.9 2.5 236 12.2 13.7 89
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Basin wide percent 103 92
WIND RIVER
BURROUGHS CREEK 8750 12.5 12.9 97 12.4 17.9 69
CASTLE CREEK 8400 .6 -M * 9.2 -M *
COLD SPRINGS 9630 2.0 1.3 154 9.7 12.4 78
DEER PARK 9700 13.0 16.0 81 16.1 23.4 69
HOBBS PARK 10100 12.9 16.0 81 13.3 16.6 80
KIRWIN 9550 11.1 10.4 107 12.9 13.8 93
LITTLE WARM 9370 8.9 8.7 102 13.0 15.3 85
OWL CREEK 8975 4.4 1.0 440 7.6 7.9 96
SOUTH PASS 9040 11.4 14.9 77 11.9 20.3 59
ST. LAWRENCE ALT 8620 .9 2.5 36 9.6 11.5 83
TOGWOTEE PASS 9580 22.9 24.7 93 24.7 27.2 91
TOWNSEND CREEK 8700 7.2 7.5 96 11.5 14.9 77
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Basin wide percent 92 79
BIGHORN BASIN
BALD MTN. 9380 17.5 20.5 85 12.8 19.7 65
BEAR TRAP MEADOW 8200 7.7 .9 856 11.5 10.6 108
BONE SPRINGS DIV 9350 17.0 16.5 103 13.9 18.2 76
GRAVE SPRINGS 8550 8.2 9.4 87 10.0 12.8 78
KIRWIN 9550 11.1 10.4 107 12.9 13.8 93
MARQUETTE 8760 9.2 -M * 11.3 -M *
MIDDLE POWDER 7760 13.1 11.6 113 15.6 14.1 111
OWL CREEK 8975 4.4 1.0 440 7.6 7.9 96
POWDER RIVER PASS 9480 13.6 9.4 145 16.8 15.1 111
SHELL CREEK 9580 17.5 15.9 110 15.9 16.3 98
TIMBER CREEK 7950 3.1 3.1 100 9.9 9.9 100
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Basin wide percent 115 92
SHOSHONE RIVER
BLACKWATER 9780 25.9 25.3 102 25.4 23.4 109
EVENING STAR 9200 26.2 24.9 105 30.8 30.4 101
MARQUETTE 8760 9.2 -M * 11.3 -M *
SYLVAN ROAD 7120 .9 5.8 16 16.8 18.6 90
YOUNTS PEAK 8350 13.9 15.5 90 13.4 17.6 76
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Basin wide percent 94 96
POWDER RIVER
BEAR TRAP MEADOW 8200 7.7 .9 856 11.5 10.6 108
CLOUD PEAK RESERVOIR 9860 15.7 16.5 95 14.9 16.6 90
GRAVE SPRINGS 8550 8.2 9.4 87 10.0 12.8 78
HANSEN SAWMILL 8360 7.1 2.5 284 10.8 10.8 100
MIDDLE POWDER 7760 13.1 11.6 113 15.6 14.1 111
POWDER RIVER PASS 9480 13.6 9.4 145 16.8 15.1 111
SOLDIER PARK 8720 6.0 -M * 10.3 -M *
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Basin wide percent 130 100
TONGUE RIVER
BIG GOOSE 7990 9.1 9.2 99 11.4 14.0 81
BONE SPRINGS DIV 9350 17.0 16.5 103 13.9 18.2 76
BURGESS JUNCTION 7880 12.3 12.1 102 11.5 14.8 78
DOME LAKE 8880 11.3 11.4 99 12.4 16.4 76
LITTLE GOOSE 8870 10.6 -M * 14.9 -M *
SUCKER CREEK 8880 14.0 12.2 115 15.4 17.3 89
TIE CREEK 6870 4.3 2.7 159 12.9 14.3 90
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Basin wide percent 106 82
BELLE FOURCHE
COLE CANYON 5910 3.6 .3 1200* 10.4 11.8 88
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Basin wide percent 1200* 88
CHEYENNE RIVER BASIN
BLIND PARK 6890 3.8 .8 475 14.1 14.3 99
NORTH RAPID CREEK 6130 4.4 .8 550 11.9 12.2 98
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Basin wide percent 512 98
UPPER N. PLATTE
ARAPAHO RIDGE 10960 21.1 22.3 95 23.9 26.2 91
BLACKHALL MTN 9820 29.1 -M * 31.0 -M *
COLUMBINE 9160 17.1 18.2 94 26.8 28.5 94
DIVIDE PEAK 8880 13.7 18.0 76 21.5 24.3 88
JOE WRIGHT 10120 22.0 23.3 94 30.9 29.8 104
LAPRELE CREEK 8375 4.8 6.1 79 10.6 15.0 71
MED BOW 10500 3.2 -M * 33.3 -M *
NORTH FRENCH CREEK 10130 25.9 32.9 79 27.0 30.7 88
NEVER SUMMER 10280 21.1 21.8 97 16.8 -M *
OLD BATTLE 10000 30.2 34.7 87 32.5 39.2 83
RAWAH 9020 11.2 6.1 184 18.0 17.2 105
SAGE CREEK BASIN 7850 -M 1.1 * 11.5 16.1 71
SAND LAKE 10050 26.1 31.4 83 26.7 29.0 92
SOUTH BRUSH CREEK 8440 7.8 9.2 85 15.0 17.8 84
TOWER 10500 38.2 50.0 76 -M 44.7 *
WEBBER SPRINGS 9250 20.6 21.7 95 25.7 29.9 86
WILLOW CREEK PASS 9540 18.2 14.2 128 18.7 15.8 118
ZIRKEL 9340 23.7 21.0 113 31.9 31.0 103
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Basin wide percent 91 91
SWEETWATER
DEER PARK 9700 13.0 16.0 81 16.1 23.4 69
LARSEN CREEK 9000 .0 -M * 11.6 -M *
SOUTH PASS 9040 11.4 14.9 77 11.9 20.3 59
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Basin wide percent 79 64
LOWER N. PLATTE
CASPER MTN. 7900 12.0 13.3 90 11.2 17.9 63
LAPRELE CREEK 8375 4.8 6.1 79 10.6 15.0 71
RENO HILL 8400 12.0 12.6 95 15.4 18.9 81
WINDY PEAK 7900 4.0 4.0 100 10.1 13.0 78
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Basin wide percent 91 73
LARAMIE RIVER
BROOKLYN LAKE 10240 20.0 23.3 86 21.3 24.7 86
CINNABAR PARK 9574 15.1 19.4 78 22.4 26.9 83
CROW CREEK 8330 2.4 .0 * 11.7 13.4 87
DEADMAN HILL 10220 18.0 19.0 95 18.8 20.6 91
RAWAH 9020 11.2 6.1 184 18.0 17.2 105
ROACH 9700 16.1 17.2 94 20.0 22.2 90
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Basin wide percent 97 90
S. PLATTE
BLACK MOUNTAIN 8920 10.4 -M * 15.2 -M *
CROW CREEK 8330 2.4 .0 * 11.7 13.4 87
DEADMAN HILL 10220 18.0 19.0 95 18.8 20.6 91
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Basin wide percent 107* 90
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 1.6 .0 * 13.3 17.1 78
DIVIDE PEAK 8880 13.7 18.0 76 21.5 24.3 88
ELK RIVER 8700 12.8 13.2 97 19.7 22.7 87
LITTLE SNAKE RIVER 8915 20.9 22.3 94 29.6 32.7 91
OLD BATTLE 10000 30.2 34.7 87 32.5 39.2 83
SAGE CREEK BASIN 7850 -M 1.1 * 11.5 16.1 71
SANDSTONE RS 8150 5.3 5.9 90 14.3 20.8 69
WHISKEY PARK 8950 24.4 26.5 92 29.9 31.5 95
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Basin wide percent 90 84
UPPER GREEN RIVER
BIG SANDY OPENING 9080 10.3 10.6 97 11.8 15.1 78
BLIND BULL SUM 8650 22.0 23.1 95 16.2 21.3 76
EAST RIM DIVIDE 7930 3.1 8.2 38 10.1 12.9 78
ELKHART PARK G.S. 9400 10.1 11.3 89 11.2 15.0 75
GROS VENTRE SUMMIT 8750 9.9 11.6 85 12.9 14.6 88
GUNSIGHT PASS 9820 12.5 12.5 100 13.4 16.0 84
KENDALL R.S. 7740 2.0 4.3 47 11.8 15.5 76
LOOMIS PARK 8240 8.3 11.0 75 15.3 18.9 81
NEW FORK LAKE 8340 3.7 6.5 57 7.8 12.1 64
POCKET CREEK 9360 8.5 -M * 11.2 -M *
SNIDER BASIN 8060 4.3 9.4 46 14.9 15.6 96
SPRING CREEK DIVIDE 9000 25.1 24.3 103 25.0 26.2 95
TRIPLE PEAK 8500 19.6 17.5 112 25.8 27.9 92
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Basin wide percent 87 83
LOWER GREEN RIVER
BLACKS FORK JCT 8870 6.0 -M * 12.3 -M *
BUCK PASTURE 9700 13.4 -M * 18.1 -M *
EF BLACKS FORK GS 9308 11.4 -M * 12.7 -M *
HAMS FORK 7840 1.7 2.9 59 10.7 13.1 82
HEWINTA 9519 8.6 4.8 179 15.0 16.1 93
HICKERSON PARK 9145 6.3 4.2 150 11.9 12.0 99
HOLE-IN-ROCK 9150 7.8 2.5 312 13.0 11.4 114
INDIAN CREEK 9425 22.6 23.0 98 20.6 25.0 82
KELLEY R.S. 8180 11.2 11.5 97 15.3 20.2 76
SPIRIT LK 10223 11.8 -M * 17.3 -M *
STEEL CREEK PARK 10200 16.1 17.1 94 18.2 19.1 95
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Basin wide percent 113 90
UPPER BEAR RIVER
BEAR RIVER RS 8500 1.0 -M * 13.4 -M *
BUG LAKE 7950 11.5 15.1 76 18.0 21.7 83
BURTS MILLER RANCH 8000 .0 -M * 8.7 -M *
CHALK CREEK #1 8993 19.6 24.2 81 24.3 28.4 86
HAYDEN FORK 9212 9.0 9.3 97 19.6 23.8 82
KELLEY R.S. 8180 11.2 11.5 97 15.3 20.2 76
LILY LAKE 9156 11.4 9.9 115 15.1 19.5 77
MONTE CRISTO 8960 21.3 26.5 80 24.8 29.2 85
SALT RIVER SUMMIT 7760 7.4 7.9 94 15.8 18.4 86
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Basin wide percent 88 82
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-M = Missing data
* = Data may not provide a valid measure of conditions.
Units = inches for the Current and Normal Snow Water Equivalent and
Total Precipitation values
If the Basin wide 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 Percent of Median represents the snow water
equivalent found at selected SNOTEL sites in or near the basin compared to
the Median value for those sites on this day.
The TOTAL PRECIPITATION Percent of Average represents the total precipitation
(beginning October 1st) found at selected SNOTEL sites in or near the basin
compared to the Average value for those sites on this day.
Contact your state water supply staff for assistance.
Reference period for comparison of conditions is 1981-2010.
Provisional data, subject to revision.
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-M = Missing data
* = Data may not provide a valid measure of conditions.
Units = inches for the Current and Normal Snow Water Equivalent and
Total Precipitation values
If the Basin Index (%) 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 Percent of Median represents the snow water
equivalent found at selected SNOTEL sites in or near the basin compared to
the Median value for those sites on this day.
The TOTAL PRECIPITATION Percent of Average represents the total precipitation
(beginning October 1st) found at selected SNOTEL sites in or near the basin
compared to the Average value for those sites on this day.
Contact your state water supply staff for assistance.
Medians and averages are calculated for the period 1981-2010.
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 for the day is less than 10% of the maximum
median value for the year.
* Basin - More than half of the sites within the basin are flagged with *,
preventing the calculation of a meaningful basin index.
The basin index is calculated as the sum of the valid current values
divided by the sum of the corresponding medians (for snow water equivalent)
or averages (for precipitation) and the resulting fraction multiplied by 100.
