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 TUESDAY: MAY 20 , 2008
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BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION
Data Site Name (Ft) % %
Current Average Avg Current Average Avg
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WYOMING
SNAKE RIVER
BASE CAMP 7030 8.1 4.3 188 31.2 26.1 120
COTTONWOOD CREEK 7670 15.0 11.5 130 29.8 34.5 86
GRAND TARGHEE 9260 57.9 -M * 42.1 -M *
GRANITE CREEK 6770 7.6 5.9 129 25.5 24.0 106
GRASSY LAKE 7265 27.8 23.3 119 49.8 43.5 114
GROS VENTRE SUMMIT 8750 6.2 8.2 76 16.7 16.7 100
GUNSIGHT PASS 9820 7.9 -M * 18.0 -M *
LEWIS LAKE DIVIDE 7850 29.4 26.2 112 42.4 44.0 96
PHILLIPS BENCH 8200 23.9 21.4 112 39.4 35.4 111
SALT RIVER SUMMIT 7760 1.6 2.5 64 18.9 23.2 81
SNAKE RIVER STATION 6920 4.7 3.1 152 31.6 27.3 116
SPRING CREEK DIVIDE 9000 17.8 22.3 80 27.5 32.1 86
THUMB DIVIDE 7980 8.0 7.5 107 24.2 23.8 102
TOGWOTEE PASS 9580 29.0 26.3 110 35.3 31.4 112
TWO OCEAN PLATEAU 9240 42.0 29.6 142 38.1 34.8 109
WILLOW CREEK 8380 23.0 22.5 102 46.3 40.9 113
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Basin wide percent of average 114 104
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 27.2 24.4 111 29.1 25.8 113
BLACK BEAR 8170 43.8 34.5 127 49.5 48.7 102
CANYON 7870 11.1 5.2 213 24.5 19.4 126
FISHER CREEK 9100 44.7 35.0 128 45.4 44.9 101
MADISON PLATEAU 7750 25.9 16.9 153 37.9 32.8 116
NORTHEAST ENTRANCE 7350 .0 1.7 0 16.5 16.5 100
PARKER PEAK 9400 28.5 23.1 123 30.3 21.8 139
SYLVAN LAKE 8420 20.9 18.2 115 32.1 27.3 118
THUMB DIVIDE 7980 8.0 7.5 107 24.2 23.8 102
TWO OCEAN PLATEAU 9240 42.0 29.6 142 38.1 34.8 109
WHISKEY CREEK 6800 14.6 7.2 203 29.3 26.1 112
WHITE MILL 8700 27.5 23.4 118 32.3 33.7 96
WOLVERINE 7650 .0 1.7 0 17.5 17.2 102
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Basin wide percent of average 129 109
WIND RIVER
BURROUGHS CREEK 8750 11.0 8.8 125 21.3 21.4 100
COLD SPRINGS 9630 .0 2.3 0 13.5 16.0 84
DEER PARK 9700 14.0 16.4 85 25.1 29.5 85
HOBBS PARK 10100 15.1 15.5 97 20.4 19.6 104
LITTLE WARM 9370 2.3 5.9 39 17.7 18.9 94
SOUTH PASS 9040 8.8 11.6 76 21.8 25.0 87
ST. LAWRENCE ALT 8620 .0 2.2 0 11.9 14.1 84
TOGWOTEE PASS 9580 29.0 26.3 110 35.3 31.4 112
TOWNSEND CREEK 8700 1.4 4.3 33 16.3 17.7 92
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Basin wide percent of average 87 95
BIGHORN BASIN
BALD MTN. 9380 17.7 22.0 80 20.7 24.0 86
BEAR TRAP MEADOW 8200 .0 .1 0 13.0 13.0 100
BLACKWATER 9780 28.5 28.7 99 30.0 27.3 110
BONE SPRINGS DIV 9350 16.6 14.6 114 23.7 20.9 113
EVENING STAR 9200 27.5 31.3 88 40.4 32.7 124
GRAVE SPRINGS 8550 8.5 5.2 163 14.6 15.1 97
KIRWIN 9550 8.7 10.0 87 18.0 16.3 110
MARQUETTE 8760 5.6 7.8 72 14.9 16.5 90
MIDDLE POWDER 7760 10.4 8.5 122 14.4 18.0 80
OWL CREEK 8975 .0 1.6 0 9.3 10.0 93
POWDER RIVER PASS 9480 9.0 6.4 141 19.1 18.2 105
SHELL CREEK 9580 17.7 15.1 117 20.9 19.2 109
SYLVAN LAKE 8420 20.9 18.2 115 32.1 27.3 118
SYLVAN ROAD 7120 .0 1.4 0 24.4 22.3 109
TIMBER CREEK 7950 .0 1.7 0 12.5 13.0 96
YOUNTS PEAK 8350 13.2 13.5 98 20.2 20.8 97
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Basin wide percent of average 99 104
SHOSHONE RIVER
BLACKWATER 9780 28.5 28.7 99 30.0 27.3 110
EVENING STAR 9200 27.5 31.3 88 40.4 32.7 124
KIRWIN 9550 8.7 10.0 87 18.0 16.3 110
MARQUETTE 8760 5.6 7.8 72 14.9 16.5 90
SYLVAN LAKE 8420 20.9 18.2 115 32.1 27.3 118
SYLVAN ROAD 7120 .0 1.4 0 24.4 22.3 109
YOUNTS PEAK 8350 13.2 13.5 98 20.2 20.8 97
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Basin wide percent of average 94 110
POWDER-TONGUE
BEAR TRAP MEADOW 8200 .0 .1 0 13.0 13.0 100
BIG GOOSE 7990 8.0 7.9 101 18.2 15.3 119
BONE SPRINGS DIV 9350 16.6 14.6 114 23.7 20.9 113
BURGESS JUNCTION 7880 14.2 8.1 175 20.4 17.5 117
CLOUD PEAK RESERVOIR 9860 16.2 13.4 121 22.2 20.1 110
DOME LAKE 8880 9.7 8.5 114 21.3 19.3 110
GRAVE SPRINGS 8550 8.5 5.2 163 14.6 15.1 97
HANSEN SAWMILL 8360 .0 1.2 0 13.2 12.9 102
MIDDLE POWDER 7760 10.4 8.5 122 14.4 18.0 80
POWDER RIVER PASS 9480 9.0 6.4 141 19.1 18.2 105
SUCKER CREEK 8880 15.7 8.5 185 24.5 20.2 121
TIE CREEK 6870 .0 .6 0 17.4 16.0 109
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Basin wide percent of average 130 108
BELLE FOURCHE
BLIND PARK 6890 .0 .0 100 16.6 16.5 101
COLE CANYON 5910 .0 .3 0 14.7 11.7 126
NORTH RAPID CREEK 6130 .0 .2 0 16.7 13.1 127
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Basin wide percent of average 0 116
UPPER N. PLATTE RIVER
COLUMBINE 9160 16.9 9.4 180 35.0 31.2 112
DIVIDE PEAK 8880 16.1 9.9 163 29.2 26.4 111
ELK RIVER 8700 10.7 5.1 210 28.8 25.0 115
JOE WRIGHT 10120 27.1 22.5 120 36.8 33.2 111
NORTH FRENCH CREEK 10130 31.8 31.4 101 37.3 32.8 114
OLD BATTLE 10000 -M 33.3 * 48.1 42.8 112
SAGE CREEK BASIN 7850 .9 5.7 16 20.6 15.3 135
SOUTH BRUSH CREEK 8440 .2 4.8 4 21.8 22.5 97
TOWER 10500 49.3 50.0 99 -M 48.5 *
WEBBER SPRINGS 9250 21.2 14.6 145 37.9 33.5 113
WILLOW CREEK PASS 9540 19.3 8.9 217 21.5 17.6 122
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Basin wide percent of average 119 113
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 16.8 20.0 84 28.3 29.8 95
CASPER MTN. 7900 12.3 9.2 134 21.4 22.5 95
DEADMAN HILL 10220 21.3 16.5 129 26.1 23.4 112
DEER PARK 9700 14.0 16.4 85 25.1 29.5 85
LAPRELE CREEK 8375 .0 2.5 0 16.6 18.9 88
RENO HILL 8400 14.4 7.6 189 26.3 23.3 113
ROACH 9700 18.4 11.1 166 28.7 25.0 115
SAND LAKE 10050 33.6 33.7 100 37.9 32.6 116
SOUTH PASS 9040 8.8 11.6 76 21.8 25.0 87
WINDY PEAK 7900 .8 1.0 80 14.2 15.8 90
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Basin wide percent of average 108 100
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .0 .0 100 20.7 20.2 102
DIVIDE PEAK 8880 16.1 9.9 163 29.2 26.4 111
OLD BATTLE 10000 -M 33.3 * 48.1 42.8 112
SANDSTONE RS 8150 5.0 2.2 227 26.0 23.8 109
WHISKEY PARK 8950 31.7 23.5 135 -M 36.6 *
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Basin wide percent of average 148 110
UPPER GREEN RIVER
BIG SANDY OPENING 9080 3.0 7.0 43 15.9 17.6 90
BLIND BULL SUM 8650 25.7 23.3 110 20.7 27.1 76
EAST RIM DIVIDE 7930 .0 7.1 0 12.8 15.2 84
ELKHART PARK G.S. 9400 3.9 7.8 50 14.1 17.9 79
GROS VENTRE SUMMIT 8750 6.2 8.2 76 16.7 16.7 100
GUNSIGHT PASS 9820 7.9 -M * 18.0 -M *
KENDALL R.S. 7740 .1 1.1 9 16.0 17.9 89
LOOMIS PARK 8240 3.0 7.7 39 20.5 21.6 95
NEW FORK LAKE 8340 .0 1.9 0 12.3 14.9 83
SNIDER BASIN 8060 1.0 5.4 19 16.0 19.7 81
SPRING CREEK DIVIDE 9000 17.8 22.3 80 27.5 32.1 86
TRIPLE PEAK 8500 15.2 13.8 110 33.6 30.8 109
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Basin wide percent of average 72 89
LOWER GREEN RIVER
HAMS FORK 7840 .0 .0 100 12.9 16.2 80
HEWINTA 9519 -M 2.9 * 20.3 19.4 105
HICKERSON PARK 9145 .0 1.1 0 11.5 11.7 98
HOLE-IN-ROCK 9150 .0 .9 0 12.0 11.3 106
INDIAN CREEK 9425 -M 21.4 * -M 31.4 *
KELLEY R.S. 8180 5.6 7.0 80 21.3 25.3 84
STEEL CREEK PARK 10200 17.4 16.8 104 22.5 22.1 102
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Basin wide percent of average 89 95
UPPER BEAR RIVER
BUG LAKE 7950 9.5 8.1 117 20.2 24.2 83
HAYDEN FORK 9212 .8 5.2 15 27.6 27.3 101
KELLEY R.S. 8180 5.6 7.0 80 21.3 25.3 84
LILY LAKE 9156 1.5 4.6 33 21.4 23.0 93
MONTE CRISTO 8960 18.8 20.0 94 30.4 32.8 93
SALT RIVER SUMMIT 7760 1.6 2.5 64 18.9 23.2 81
TRIAL LAKE 9992 14.2 21.0 68 28.7 31.9 90
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Basin wide percent of average 76 90
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-M = Missing data
* = Data may not provide a valid measure of conditions.
Units = inches for the Current and Average Snow Water Equivalent and
Total Precipitation values
If the Basin wide percent of average 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 Average represents the snow water
equivalent found at selected SNOTEL sites in or near the basin compared to
the average 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 average conditions is 1961-90.
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.