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 21 , 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 7.1 3.8 187 31.2 26.1 120
COTTONWOOD CREEK 7670 14.0 11.0 127 29.7 34.6 86
GRAND TARGHEE 9260 55.8 -M * 42.1 -M *
GRANITE CREEK 6770 7.0 5.4 130 25.7 24.0 107
GRASSY LAKE 7265 26.9 22.7 119 50.0 43.6 115
GROS VENTRE SUMMIT 8750 5.3 7.9 67 16.7 16.8 99
GUNSIGHT PASS 9820 7.2 -M * 18.1 -M *
LEWIS LAKE DIVIDE 7850 28.6 25.5 112 42.5 44.2 96
PHILLIPS BENCH 8200 23.0 20.8 111 39.5 35.5 111
SALT RIVER SUMMIT 7760 .7 2.0 35 18.9 23.3 81
SNAKE RIVER STATION 6920 3.4 2.6 131 31.7 27.4 116
SPRING CREEK DIVIDE 9000 16.9 21.7 78 27.5 32.2 85
THUMB DIVIDE 7980 6.9 7.1 97 24.3 23.9 102
TOGWOTEE PASS 9580 28.1 26.0 108 35.5 31.5 113
TWO OCEAN PLATEAU 9240 41.3 29.3 141 38.3 34.9 110
WILLOW CREEK 8380 22.3 21.9 102 46.5 41.1 113
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Basin wide percent of average 111 104
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 26.9 24.2 111 29.1 25.9 112
BLACK BEAR 8170 42.9 33.9 127 49.5 48.8 101
CANYON 7870 10.5 4.7 223 24.5 19.5 126
FISHER CREEK 9100 -M 34.5 * 45.3 45.1 100
MADISON PLATEAU 7750 25.1 16.3 154 37.9 32.9 115
NORTHEAST ENTRANCE 7350 .2 1.5 13 16.6 16.6 100
PARKER PEAK 9400 27.3 22.8 120 -M 21.9 *
SYLVAN LAKE 8420 20.1 17.6 114 32.2 27.4 118
THUMB DIVIDE 7980 6.9 7.1 97 24.3 23.9 102
TWO OCEAN PLATEAU 9240 41.3 29.3 141 38.3 34.9 110
WHISKEY CREEK 6800 14.0 6.6 212 29.2 26.2 111
WHITE MILL 8700 26.9 23.0 117 32.5 33.8 96
WOLVERINE 7650 .0 1.5 0 17.7 17.3 102
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Basin wide percent of average 128 107
WIND RIVER
BURROUGHS CREEK 8750 10.3 8.2 126 21.3 21.5 99
COLD SPRINGS 9630 -M 2.0 * 13.6 16.1 84
DEER PARK 9700 13.4 15.9 84 25.1 29.7 85
HOBBS PARK 10100 14.2 15.1 94 20.4 19.7 104
LITTLE WARM 9370 1.0 5.4 19 17.7 19.0 93
SOUTH PASS 9040 7.8 11.0 71 21.8 25.1 87
ST. LAWRENCE ALT 8620 .2 1.9 11 12.0 14.2 85
TOGWOTEE PASS 9580 28.1 26.0 108 35.5 31.5 113
TOWNSEND CREEK 8700 .5 3.9 13 16.2 17.8 91
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Basin wide percent of average 86 94
BIGHORN BASIN
BALD MTN. 9380 16.8 21.6 78 20.7 24.1 86
BEAR TRAP MEADOW 8200 .1 .0 13.0 13.1 99
BLACKWATER 9780 28.1 28.5 99 30.1 27.4 110
BONE SPRINGS DIV 9350 15.1 14.0 108 23.8 21.0 113
EVENING STAR 9200 27.3 31.0 88 40.4 32.8 123
GRAVE SPRINGS 8550 7.5 4.4 170 14.5 15.2 95
KIRWIN 9550 8.0 9.7 82 18.0 16.4 110
MARQUETTE 8760 4.4 7.4 59 14.9 16.6 90
MIDDLE POWDER 7760 9.4 7.9 119 14.2 18.1 78
OWL CREEK 8975 .2 1.4 14 9.3 10.1 92
POWDER RIVER PASS 9480 7.9 5.8 136 19.1 18.4 104
SHELL CREEK 9580 17.0 14.8 115 20.9 19.3 108
SYLVAN LAKE 8420 20.1 17.6 114 32.2 27.4 118
SYLVAN ROAD 7120 .0 1.1 0 24.3 22.4 108
TIMBER CREEK 7950 .3 1.5 20 12.4 13.1 95
YOUNTS PEAK 8350 12.8 13.0 98 20.6 20.9 99
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Basin wide percent of average 97 104
SHOSHONE RIVER
BLACKWATER 9780 28.1 28.5 99 30.1 27.4 110
EVENING STAR 9200 27.3 31.0 88 40.4 32.8 123
KIRWIN 9550 8.0 9.7 82 18.0 16.4 110
MARQUETTE 8760 4.4 7.4 59 14.9 16.6 90
SYLVAN LAKE 8420 20.1 17.6 114 32.2 27.4 118
SYLVAN ROAD 7120 .0 1.1 0 24.3 22.4 108
YOUNTS PEAK 8350 12.8 13.0 98 20.6 20.9 99
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Basin wide percent of average 93 110
POWDER-TONGUE
BEAR TRAP MEADOW 8200 .1 .0 13.0 13.1 99
BIG GOOSE 7990 6.9 7.6 91 18.2 15.4 118
BONE SPRINGS DIV 9350 15.1 14.0 108 23.8 21.0 113
BURGESS JUNCTION 7880 13.3 7.6 175 20.4 17.6 116
CLOUD PEAK RESERVOIR 9860 15.3 12.8 120 22.1 20.2 109
DOME LAKE 8880 8.5 7.8 109 21.3 19.5 109
GRAVE SPRINGS 8550 7.5 4.4 170 14.5 15.2 95
HANSEN SAWMILL 8360 .3 1.0 30 13.2 13.0 102
MIDDLE POWDER 7760 9.4 7.9 119 14.2 18.1 78
POWDER RIVER PASS 9480 7.9 5.8 136 19.1 18.4 104
SUCKER CREEK 8880 14.7 8.1 181 24.7 20.3 122
TIE CREEK 6870 .3 .5 60 17.3 16.1 107
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Basin wide percent of average 128 107
BELLE FOURCHE
BLIND PARK 6890 -M .0 * 16.6 16.6 100
COLE CANYON 5910 .0 .1 0 14.7 11.8 125
NORTH RAPID CREEK 6130 -M .1 * 16.7 13.2 127
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Basin wide percent of average 0* 115
UPPER N. PLATTE RIVER
COLUMBINE 9160 15.4 8.7 177 35.2 31.3 112
DIVIDE PEAK 8880 14.7 9.3 158 29.2 26.5 110
ELK RIVER 8700 9.0 4.6 196 28.7 25.1 114
JOE WRIGHT 10120 26.0 22.2 117 36.8 33.4 110
NORTH FRENCH CREEK 10130 30.3 30.9 98 37.4 32.9 114
OLD BATTLE 10000 35.0 32.8 107 48.1 43.0 112
SAGE CREEK BASIN 7850 .3 5.4 6 20.6 15.4 134
SOUTH BRUSH CREEK 8440 .2 4.5 4 21.9 22.6 97
TOWER 10500 48.7 49.6 98 -M 48.6 *
WEBBER SPRINGS 9250 19.9 13.9 143 37.9 33.6 113
WILLOW CREEK PASS 9540 18.5 8.4 220 21.5 17.7 121
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Basin wide percent of average 115 113
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 15.9 19.3 82 28.3 29.9 95
CASPER MTN. 7900 11.1 8.7 128 21.4 22.7 94
DEADMAN HILL 10220 20.6 16.1 128 26.1 23.5 111
DEER PARK 9700 13.4 15.9 84 25.1 29.7 85
LAPRELE CREEK 8375 .0 2.3 0 16.5 19.0 87
RENO HILL 8400 13.1 7.1 185 26.6 23.4 114
ROACH 9700 17.4 10.6 164 28.8 25.1 115
SAND LAKE 10050 32.8 33.2 99 37.9 32.8 116
SOUTH PASS 9040 7.8 11.0 71 21.8 25.1 87
WINDY PEAK 7900 .8 .9 89 14.2 15.9 89
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Basin wide percent of average 106 100
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .0 .0 100 20.7 20.2 102
DIVIDE PEAK 8880 14.7 9.3 158 29.2 26.5 110
OLD BATTLE 10000 35.0 32.8 107 48.1 43.0 112
SANDSTONE RS 8150 3.5 2.0 175 26.0 23.9 109
WHISKEY PARK 8950 31.7 22.8 139 43.6 36.7 119
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Basin wide percent of average 127 112
UPPER GREEN RIVER
BIG SANDY OPENING 9080 1.6 6.5 25 16.0 17.7 90
BLIND BULL SUM 8650 24.9 22.9 109 20.9 27.1 77
EAST RIM DIVIDE 7930 .0 6.7 0 12.9 15.3 84
ELKHART PARK G.S. 9400 3.0 7.4 41 14.4 18.0 80
GROS VENTRE SUMMIT 8750 5.3 7.9 67 16.7 16.8 99
GUNSIGHT PASS 9820 7.2 -M * 18.1 -M *
KENDALL R.S. 7740 .1 .5 20 16.1 17.9 90
LOOMIS PARK 8240 2.0 7.2 28 20.5 21.7 94
NEW FORK LAKE 8340 .0 1.6 0 12.8 15.0 85
SNIDER BASIN 8060 .4 4.9 8 16.1 19.8 81
SPRING CREEK DIVIDE 9000 16.9 21.7 78 27.5 32.2 85
TRIPLE PEAK 8500 14.2 13.1 108 33.7 30.9 109
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Basin wide percent of average 68 89
LOWER GREEN RIVER
HAMS FORK 7840 .1 .0 13.0 16.3 80
HEWINTA 9519 -M 2.6 * 20.3 19.5 104
HICKERSON PARK 9145 .0 .9 0 11.4 11.8 97
HOLE-IN-ROCK 9150 .0 .7 0 12.0 11.4 105
INDIAN CREEK 9425 -M 20.9 * -M 31.5 *
KELLEY R.S. 8180 4.8 6.5 74 21.4 25.4 84
STEEL CREEK PARK 10200 16.5 16.4 101 22.5 22.2 101
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Basin wide percent of average 87 94
UPPER BEAR RIVER
BUG LAKE 7950 8.4 7.5 112 20.3 24.3 84
HAYDEN FORK 9212 .2 4.8 4 27.6 27.4 101
KELLEY R.S. 8180 4.8 6.5 74 21.4 25.4 84
LILY LAKE 9156 1.0 4.3 23 21.7 23.1 94
MONTE CRISTO 8960 17.4 19.4 90 30.4 32.9 92
SALT RIVER SUMMIT 7760 .7 2.0 35 18.9 23.3 81
TRIAL LAKE 9992 13.1 20.5 64 28.8 32.1 90
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Basin wide percent of average 70 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.