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 MONDAY: MAY 5 , 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 17.1 10.8 158 30.4 24.7 123
COTTONWOOD CREEK 7670 23.4 18.3 128 28.2 32.5 87
GRAND TARGHEE 9260 55.1 -M * 38.4 -M *
GRANITE CREEK 6770 15.1 11.5 131 24.9 22.7 110
GRASSY LAKE 7265 -M 31.7 * 47.9 41.5 115
GROS VENTRE SUMMIT 8750 13.4 12.5 107 16.0 15.6 103
GUNSIGHT PASS 9820 13.9 -M * 16.9 -M *
LEWIS LAKE DIVIDE 7850 39.3 33.3 118 41.0 42.2 97
PHILLIPS BENCH 8200 34.7 28.3 123 38.5 33.6 115
SALT RIVER SUMMIT 7760 12.2 9.2 133 18.1 21.9 83
SNAKE RIVER STATION 6920 16.9 10.5 161 30.3 25.9 117
SPRING CREEK DIVIDE 9000 24.0 27.9 86 26.5 30.6 87
THUMB DIVIDE 7980 16.3 13.6 120 23.1 22.4 103
TOGWOTEE PASS 9580 30.5 28.1 109 33.7 29.5 114
TWO OCEAN PLATEAU 9240 -M 31.7 * -M 32.7 *
WILLOW CREEK 8380 31.7 29.5 107 43.7 38.4 114
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Basin wide percent of average 118 105
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 27.8 26.0 107 26.7 24.0 111
BLACK BEAR 8170 50.3 39.2 128 47.5 46.5 102
CANYON 7870 18.3 10.1 181 23.3 18.1 129
FISHER CREEK 9100 45.0 37.6 120 43.2 42.6 101
MADISON PLATEAU 7750 32.9 23.1 142 35.9 30.9 116
NORTHEAST ENTRANCE 7350 8.0 5.9 136 15.3 15.1 101
PARKER PEAK 9400 31.6 24.5 129 -M 20.0 *
SYLVAN LAKE 8420 22.2 23.0 97 29.9 25.2 119
THUMB DIVIDE 7980 16.3 13.6 120 23.1 22.4 103
TWO OCEAN PLATEAU 9240 -M 31.7 * -M 32.7 *
WHISKEY CREEK 6800 20.5 13.8 149 27.7 24.6 113
WHITE MILL 8700 31.2 26.2 119 30.8 31.8 97
WOLVERINE 7650 7.8 6.2 126 15.5 15.6 99
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Basin wide percent of average 125 107
WIND RIVER
BURROUGHS CREEK 8750 16.7 12.6 133 20.7 19.8 105
COLD SPRINGS 9630 3.8 4.6 83 12.1 14.4 84
DEER PARK 9700 16.3 17.2 95 23.2 27.5 84
HOBBS PARK 10100 16.1 17.7 91 18.4 17.5 105
LITTLE WARM 9370 9.7 10.0 97 16.1 17.3 93
SOUTH PASS 9040 14.7 17.2 85 20.2 23.3 87
ST. LAWRENCE ALT 8620 4.9 5.4 91 10.1 12.6 80
TOGWOTEE PASS 9580 30.5 28.1 109 33.7 29.5 114
TOWNSEND CREEK 8700 8.6 8.0 108 14.9 16.0 93
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Basin wide percent of average 100 95
BIGHORN BASIN
BALD MTN. 9380 20.1 23.5 86 18.6 21.9 85
BEAR TRAP MEADOW 8200 7.1 1.9 374 11.7 11.4 103
BLACKWATER 9780 29.7 28.7 103 27.3 25.3 108
BONE SPRINGS DIV 9350 21.7 17.8 122 21.3 18.9 113
EVENING STAR 9200 32.6 33.2 98 38.4 30.5 126
GRAVE SPRINGS 8550 12.0 10.4 115 13.1 13.6 96
KIRWIN 9550 13.6 12.7 107 16.7 14.7 114
MARQUETTE 8760 9.4 10.7 88 12.7 14.3 89
MIDDLE POWDER 7760 15.1 13.6 111 12.4 16.3 76
OWL CREEK 8975 .8 3.6 22 8.5 8.6 99
POWDER RIVER PASS 9480 13.1 9.8 134 17.4 16.3 107
SHELL CREEK 9580 18.8 16.6 113 18.9 17.4 109
SYLVAN LAKE 8420 22.2 23.0 97 29.9 25.2 119
SYLVAN ROAD 7120 9.3 7.0 133 23.3 20.9 111
TIMBER CREEK 7950 4.8 4.5 107 10.4 11.0 95
YOUNTS PEAK 8350 18.3 17.8 103 19.7 19.2 103
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Basin wide percent of average 106 105
SHOSHONE RIVER
BLACKWATER 9780 29.7 28.7 103 27.3 25.3 108
EVENING STAR 9200 32.6 33.2 98 38.4 30.5 126
KIRWIN 9550 13.6 12.7 107 16.7 14.7 114
MARQUETTE 8760 9.4 10.7 88 12.7 14.3 89
SYLVAN LAKE 8420 22.2 23.0 97 29.9 25.2 119
SYLVAN ROAD 7120 9.3 7.0 133 23.3 20.9 111
YOUNTS PEAK 8350 18.3 17.8 103 19.7 19.2 103
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Basin wide percent of average 102 112
POWDER-TONGUE
BEAR TRAP MEADOW 8200 7.1 1.9 374 11.7 11.4 103
BIG GOOSE 7990 11.0 11.0 100 16.2 13.5 120
BONE SPRINGS DIV 9350 21.7 17.8 122 21.3 18.9 113
BURGESS JUNCTION 7880 16.8 12.6 133 18.3 15.9 115
CLOUD PEAK RESERVOIR 9860 19.2 16.0 120 19.8 17.8 111
DOME LAKE 8880 13.3 12.6 106 19.4 17.4 111
GRAVE SPRINGS 8550 12.0 10.4 115 13.1 13.6 96
HANSEN SAWMILL 8360 5.0 4.2 119 11.7 11.4 103
MIDDLE POWDER 7760 15.1 13.6 111 12.4 16.3 76
POWDER RIVER PASS 9480 13.1 9.8 134 17.4 16.3 107
SUCKER CREEK 8880 17.7 12.2 145 21.8 18.0 121
TIE CREEK 6870 7.6 3.4 224 15.6 14.0 111
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Basin wide percent of average 127 108
BELLE FOURCHE
BLIND PARK 6890 5.3 3.4 156 15.0 14.7 102
COLE CANYON 5910 6.9 3.2 216 12.1 10.1 120
NORTH RAPID CREEK 6130 9.4 2.4 392 14.1 11.8 119
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Basin wide percent of average 240 113
UPPER N. PLATTE RIVER
COLUMBINE 9160 26.1 19.1 137 33.2 29.6 112
DIVIDE PEAK 8880 23.7 17.9 132 27.6 24.8 111
ELK RIVER 8700 21.0 13.0 162 27.0 23.5 115
JOE WRIGHT 10120 28.4 25.1 113 34.1 30.8 111
NORTH FRENCH CREEK 10130 34.3 34.5 99 35.3 30.4 116
OLD BATTLE 10000 38.6 37.3 103 45.8 40.6 113
SAGE CREEK BASIN 7850 14.1 10.4 136 19.8 14.4 138
SOUTH BRUSH CREEK 8440 10.5 9.9 106 20.5 20.7 99
TOWER 10500 49.6 52.4 95 48.0 46.0 104
WEBBER SPRINGS 9250 28.1 23.7 119 36.3 31.7 115
WILLOW CREEK PASS 9540 21.3 13.8 154 19.8 16.1 123
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Basin wide percent of average 115 113
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 22.6 27.5 82 26.8 27.7 97
CASPER MTN. 7900 16.7 16.1 104 19.2 20.3 95
DEADMAN HILL 10220 21.4 19.6 109 23.8 21.5 111
DEER PARK 9700 16.3 17.2 95 23.2 27.5 84
LAPRELE CREEK 8375 7.0 6.1 115 15.5 17.0 91
RENO HILL 8400 17.8 13.6 131 23.6 20.9 113
ROACH 9700 20.9 17.6 119 26.7 23.0 116
SAND LAKE 10050 34.0 37.0 92 35.4 30.1 118
SOUTH PASS 9040 14.7 17.2 85 20.2 23.3 87
WINDY PEAK 7900 7.5 3.9 192 13.4 14.0 96
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Basin wide percent of average 102 101
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 7.7 3.5 220 19.5 19.0 103
DIVIDE PEAK 8880 23.7 17.9 132 27.6 24.8 111
OLD BATTLE 10000 38.6 37.3 103 45.8 40.6 113
SANDSTONE RS 8150 15.4 7.9 195 24.6 22.3 110
WHISKEY PARK 8950 38.9 30.0 130 41.2 34.6 119
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Basin wide percent of average 129 112
UPPER GREEN RIVER
BIG SANDY OPENING 9080 12.1 12.4 98 15.1 16.3 93
BLIND BULL SUM 8650 27.0 27.2 99 19.7 25.6 77
EAST RIM DIVIDE 7930 7.8 12.3 63 12.5 14.2 88
ELKHART PARK G.S. 9400 10.8 12.1 89 13.2 16.4 80
GROS VENTRE SUMMIT 8750 13.4 12.5 107 16.0 15.6 103
GUNSIGHT PASS 9820 13.9 -M * 16.9 -M *
KENDALL R.S. 7740 8.6 8.4 102 15.2 16.8 90
LOOMIS PARK 8240 12.8 13.2 97 19.9 20.3 98
NEW FORK LAKE 8340 6.6 7.3 90 10.5 13.7 77
SNIDER BASIN 8060 11.1 11.5 97 15.8 18.8 84
SPRING CREEK DIVIDE 9000 24.0 27.9 86 26.5 30.6 87
TRIPLE PEAK 8500 23.5 22.3 105 32.0 29.1 110
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Basin wide percent of average 94 90
LOWER GREEN RIVER
HAMS FORK 7840 8.1 4.7 172 11.9 15.1 79
HEWINTA 9519 11.0 8.0 138 19.4 18.2 107
HICKERSON PARK 9145 3.3 4.7 70 11.1 10.5 106
HOLE-IN-ROCK 9150 3.2 3.9 82 11.8 10.1 117
INDIAN CREEK 9425 26.2 27.3 96 -M 29.9 *
KELLEY R.S. 8180 14.0 12.8 109 20.0 24.0 83
STEEL CREEK PARK 10200 19.5 18.9 103 21.6 20.7 104
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Basin wide percent of average 106 97
UPPER BEAR RIVER
BUG LAKE 7950 16.5 16.2 102 18.8 22.8 82
HAYDEN FORK 9212 13.6 11.5 118 26.3 25.6 103
KELLEY R.S. 8180 14.0 12.8 109 20.0 24.0 83
LILY LAKE 9156 13.5 9.8 138 20.5 21.5 95
MONTE CRISTO 8960 29.3 27.0 109 29.4 30.9 95
SALT RIVER SUMMIT 7760 12.2 9.2 133 18.1 21.9 83
TRIAL LAKE 9992 24.2 26.0 93 27.6 30.0 92
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Basin wide percent of average 110 91
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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.