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 FRIDAY: MAY 2 , 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 18.6 11.9 156 30.2 24.5 123
COTTONWOOD CREEK 7670 25.3 19.4 130 28.3 32.1 88
GRAND TARGHEE 9260 54.7 -M * 38.3 -M *
GRANITE CREEK 6770 16.7 12.5 134 24.9 22.5 111
GRASSY LAKE 7265 39.4 33.0 119 47.8 41.0 117
GROS VENTRE SUMMIT 8750 13.6 13.1 104 15.9 15.3 104
GUNSIGHT PASS 9820 13.5 -M * 16.7 -M *
LEWIS LAKE DIVIDE 7850 40.0 34.3 117 41.0 41.8 98
PHILLIPS BENCH 8200 35.3 29.2 121 38.5 33.2 116
SALT RIVER SUMMIT 7760 12.6 10.3 122 17.9 21.7 82
SNAKE RIVER STATION 6920 18.5 11.8 157 30.3 25.6 118
SPRING CREEK DIVIDE 9000 23.6 28.4 83 26.4 30.3 87
THUMB DIVIDE 7980 17.8 14.6 122 23.1 22.1 105
TOGWOTEE PASS 9580 30.3 28.0 108 33.6 29.1 115
TWO OCEAN PLATEAU 9240 -M 31.8 * -M 32.2 *
WILLOW CREEK 8380 33.1 30.4 109 43.5 37.9 115
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Basin wide percent of average 117 106
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 27.8 25.9 107 26.6 23.6 113
BLACK BEAR 8170 48.5 39.8 122 47.4 46.0 103
CANYON 7870 18.3 11.0 166 23.3 17.8 131
FISHER CREEK 9100 44.6 37.7 118 42.8 42.1 102
MADISON PLATEAU 7750 32.7 24.0 136 35.8 30.5 117
NORTHEAST ENTRANCE 7350 9.0 6.7 134 15.3 14.9 103
PARKER PEAK 9400 31.0 24.5 127 -M 19.6 *
SYLVAN LAKE 8420 22.2 23.5 94 29.9 24.8 121
THUMB DIVIDE 7980 17.8 14.6 122 23.1 22.1 105
TWO OCEAN PLATEAU 9240 -M 31.8 * -M 32.2 *
WHISKEY CREEK 6800 20.7 14.9 139 27.7 24.3 114
WHITE MILL 8700 30.9 26.3 117 30.8 31.3 98
WOLVERINE 7650 8.9 6.9 129 15.5 15.3 101
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Basin wide percent of average 122 109
WIND RIVER
BURROUGHS CREEK 8750 16.8 13.4 125 20.8 19.4 107
COLD SPRINGS 9630 3.8 4.8 79 11.9 14.0 85
DEER PARK 9700 16.3 18.5 88 23.0 27.1 85
HOBBS PARK 10100 15.9 18.0 88 18.0 17.1 105
LITTLE WARM 9370 10.1 10.8 94 16.1 16.9 95
SOUTH PASS 9040 14.6 17.8 82 20.2 22.8 89
ST. LAWRENCE ALT 8620 4.7 6.0 78 10.0 12.2 82
TOGWOTEE PASS 9580 30.3 28.0 108 33.6 29.1 115
TOWNSEND CREEK 8700 8.6 8.8 98 14.7 15.6 94
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Basin wide percent of average 96 97
BIGHORN BASIN
BALD MTN. 9380 19.6 23.5 83 18.8 21.5 87
BEAR TRAP MEADOW 8200 7.6 2.3 330 11.6 11.0 105
BLACKWATER 9780 29.5 28.9 102 27.2 24.8 110
BONE SPRINGS DIV 9350 21.8 18.3 119 20.8 18.4 113
EVENING STAR 9200 33.3 33.3 100 38.2 30.0 127
GRAVE SPRINGS 8550 11.7 11.0 106 12.8 13.2 97
KIRWIN 9550 13.6 12.9 105 16.6 14.3 116
MARQUETTE 8760 9.0 11.2 80 12.4 13.8 90
MIDDLE POWDER 7760 14.8 14.2 104 12.2 15.9 77
OWL CREEK 8975 1.1 3.9 28 8.3 8.3 100
POWDER RIVER PASS 9480 13.1 10.5 125 17.3 15.9 109
SHELL CREEK 9580 19.0 16.8 113 18.6 16.9 110
SYLVAN LAKE 8420 22.2 23.5 94 29.9 24.8 121
SYLVAN ROAD 7120 10.5 7.8 135 23.4 20.6 114
TIMBER CREEK 7950 4.7 4.8 98 10.2 10.6 96
YOUNTS PEAK 8350 18.7 18.1 103 19.7 18.9 104
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Basin wide percent of average 104 107
SHOSHONE RIVER
BLACKWATER 9780 29.5 28.9 102 27.2 24.8 110
EVENING STAR 9200 33.3 33.3 100 38.2 30.0 127
KIRWIN 9550 13.6 12.9 105 16.6 14.3 116
MARQUETTE 8760 9.0 11.2 80 12.4 13.8 90
SYLVAN LAKE 8420 22.2 23.5 94 29.9 24.8 121
SYLVAN ROAD 7120 10.5 7.8 135 23.4 20.6 114
YOUNTS PEAK 8350 18.7 18.1 103 19.7 18.9 104
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Basin wide percent of average 101 114
POWDER-TONGUE
BEAR TRAP MEADOW 8200 7.6 2.3 330 11.6 11.0 105
BIG GOOSE 7990 10.6 11.5 92 15.2 13.0 117
BONE SPRINGS DIV 9350 21.8 18.3 119 20.8 18.4 113
BURGESS JUNCTION 7880 16.2 13.1 124 17.8 15.5 115
CLOUD PEAK RESERVOIR 9860 18.8 16.2 116 19.1 17.3 110
DOME LAKE 8880 12.9 13.3 97 18.3 16.9 108
GRAVE SPRINGS 8550 11.7 11.0 106 12.8 13.2 97
HANSEN SAWMILL 8360 5.0 4.7 106 11.5 11.1 104
MIDDLE POWDER 7760 14.8 14.2 104 12.2 15.9 77
POWDER RIVER PASS 9480 13.1 10.5 125 17.3 15.9 109
SUCKER CREEK 8880 17.2 12.9 133 20.8 17.6 118
TIE CREEK 6870 7.3 3.9 187 15.1 13.6 111
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Basin wide percent of average 119 107
BELLE FOURCHE
BLIND PARK 6890 5.2 4.0 130 14.5 14.3 101
COLE CANYON 5910 6.1 4.5 136 11.1 9.6 116
NORTH RAPID CREEK 6130 8.6 3.4 253 13.1 11.5 114
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Basin wide percent of average 167 109
UPPER N. PLATTE RIVER
COLUMBINE 9160 25.2 20.5 123 32.4 29.3 111
DIVIDE PEAK 8880 23.7 19.0 125 27.4 24.4 112
ELK RIVER 8700 20.9 14.5 144 26.5 23.2 114
JOE WRIGHT 10120 27.9 25.1 111 33.3 30.3 110
NORTH FRENCH CREEK 10130 33.6 34.5 97 34.7 29.9 116
OLD BATTLE 10000 38.2 37.0 103 45.3 40.1 113
SAGE CREEK BASIN 7850 14.2 11.0 129 19.6 14.2 138
SOUTH BRUSH CREEK 8440 10.4 10.8 96 19.7 20.3 97
TOWER 10500 48.9 52.3 93 -M 45.3 *
WEBBER SPRINGS 9250 28.2 24.8 114 35.8 31.3 114
WILLOW CREEK PASS 9540 20.9 14.1 148 19.5 15.8 123
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Basin wide percent of average 111 114
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 23.0 28.1 82 26.4 27.1 97
CASPER MTN. 7900 15.5 16.9 92 18.3 19.7 93
DEADMAN HILL 10220 20.8 19.7 106 23.4 21.1 111
DEER PARK 9700 16.3 18.5 88 23.0 27.1 85
LAPRELE CREEK 8375 6.9 6.9 100 14.7 16.6 89
RENO HILL 8400 16.7 14.5 115 21.9 20.4 107
ROACH 9700 20.7 18.3 113 26.3 22.6 116
SAND LAKE 10050 33.3 37.0 90 34.7 29.5 118
SOUTH PASS 9040 14.6 17.8 82 20.2 22.8 89
WINDY PEAK 7900 7.2 4.7 153 12.8 13.6 94
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Basin wide percent of average 96 101
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 8.4 4.3 195 19.4 18.7 104
DIVIDE PEAK 8880 23.7 19.0 125 27.4 24.4 112
OLD BATTLE 10000 38.2 37.0 103 45.3 40.1 113
SANDSTONE RS 8150 15.6 9.1 171 24.5 22.0 111
WHISKEY PARK 8950 38.7 30.4 127 -M 34.0 *
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Basin wide percent of average 125 111
UPPER GREEN RIVER
BIG SANDY OPENING 9080 12.9 13.2 98 14.9 16.0 93
BLIND BULL SUM 8650 27.4 27.7 99 19.6 25.3 77
EAST RIM DIVIDE 7930 8.5 13.0 65 12.4 14.0 89
ELKHART PARK G.S. 9400 11.3 12.6 90 13.0 16.1 81
GROS VENTRE SUMMIT 8750 13.6 13.1 104 15.9 15.3 104
GUNSIGHT PASS 9820 13.5 -M * 16.7 -M *
KENDALL R.S. 7740 9.7 9.6 101 15.2 16.6 92
LOOMIS PARK 8240 13.9 14.0 99 19.8 20.0 99
NEW FORK LAKE 8340 7.9 8.2 96 10.4 13.5 77
SNIDER BASIN 8060 12.4 12.4 100 15.7 18.6 84
SPRING CREEK DIVIDE 9000 23.6 28.4 83 26.4 30.3 87
TRIPLE PEAK 8500 24.4 23.4 104 31.9 28.8 111
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Basin wide percent of average 94 91
LOWER GREEN RIVER
HAMS FORK 7840 9.8 5.6 175 11.8 14.8 80
HEWINTA 9519 11.2 9.0 124 19.3 17.9 108
HICKERSON PARK 9145 4.1 5.4 76 11.0 10.3 107
HOLE-IN-ROCK 9150 4.0 4.5 89 11.7 9.8 119
INDIAN CREEK 9425 27.0 28.1 96 -M 29.6 *
KELLEY R.S. 8180 14.9 13.8 108 19.9 23.7 84
STEEL CREEK PARK 10200 19.4 18.7 104 21.5 20.3 106
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Basin wide percent of average 106 98
UPPER BEAR RIVER
BUG LAKE 7950 18.4 17.6 105 18.6 22.5 83
HAYDEN FORK 9212 15.4 12.6 122 26.2 25.3 104
KELLEY R.S. 8180 14.9 13.8 108 19.9 23.7 84
LILY LAKE 9156 14.1 10.8 131 20.3 21.2 96
MONTE CRISTO 8960 30.8 28.0 110 29.4 30.4 97
SALT RIVER SUMMIT 7760 12.6 10.3 122 17.9 21.7 82
TRIAL LAKE 9992 24.2 26.4 92 27.5 29.6 93
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Basin wide percent of average 109 92
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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.