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 SUNDAY: APRIL 13 , 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 -M 17.2 * -M 22.8 *
COTTONWOOD CREEK 7670 26.9 24.0 112 26.7 29.5 91
GRAND TARGHEE 9260 51.1 -M * 35.4 -M *
GRANITE CREEK 6770 19.4 17.3 112 24.5 21.0 117
GRASSY LAKE 7265 38.9 37.1 105 44.9 38.2 118
GROS VENTRE SUMMIT 8750 13.6 14.6 93 15.0 13.9 108
GUNSIGHT PASS 9820 13.0 -M * 15.3 -M *
LEWIS LAKE DIVIDE 7850 37.9 36.7 103 39.9 39.1 102
PHILLIPS BENCH 8200 35.7 30.5 117 37.0 30.9 120
SALT RIVER SUMMIT 7760 14.6 14.6 100 17.1 20.1 85
SNAKE RIVER STATION 6920 21.5 17.9 120 29.1 23.8 122
SPRING CREEK DIVIDE 9000 23.4 28.4 82 25.4 28.3 90
THUMB DIVIDE 7980 20.3 18.9 107 22.0 20.3 108
TOGWOTEE PASS 9580 29.1 26.5 110 31.3 26.5 118
TWO OCEAN PLATEAU 9240 -M 30.3 * -M 29.6 *
WILLOW CREEK 8380 35.4 31.8 111 40.3 34.6 116
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Basin wide percent of average 106 108
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 26.8 25.3 106 25.4 21.6 118
BLACK BEAR 8170 47.9 40.8 117 -M 43.0 *
CANYON 7870 18.7 14.1 133 22.0 16.5 133
FISHER CREEK 9100 43.3 36.9 117 -M 38.8 *
MADISON PLATEAU 7750 31.3 26.2 119 33.3 28.7 116
NORTHEAST ENTRANCE 7350 -M 10.9 * -M 13.6 *
PARKER PEAK 9400 28.4 23.3 122 -M 17.6 *
SYLVAN LAKE 8420 23.2 24.1 96 28.0 22.5 124
THUMB DIVIDE 7980 20.3 18.9 107 22.0 20.3 108
TWO OCEAN PLATEAU 9240 -M 30.3 * -M 29.6 *
WHISKEY CREEK 6800 19.6 17.8 110 25.9 22.5 115
WHITE MILL 8700 29.6 25.9 114 -M 28.9 *
WOLVERINE 7650 11.3 11.4 99 15.0 13.8 109
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Basin wide percent of average 113 118
WIND RIVER
BURROUGHS CREEK 8750 16.9 15.2 111 19.8 17.5 113
COLD SPRINGS 9630 7.9 7.6 104 11.0 11.9 92
DEER PARK 9700 17.1 16.8 102 21.7 23.9 91
HOBBS PARK 10100 15.7 16.8 93 15.6 14.4 108
LITTLE WARM 9370 11.1 12.6 88 14.8 14.6 101
SOUTH PASS 9040 15.9 17.7 90 18.8 20.1 94
ST. LAWRENCE ALT 8620 7.7 7.5 103 9.0 10.0 90
TOGWOTEE PASS 9580 29.1 26.5 110 31.3 26.5 118
TOWNSEND CREEK 8700 9.9 9.8 101 13.3 13.1 102
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Basin wide percent of average 101 102
BIGHORN BASIN
BALD MTN. 9380 17.8 21.6 82 16.4 18.9 87
BEAR TRAP MEADOW 8200 9.9 4.8 206 9.9 9.2 108
BLACKWATER 9780 27.8 26.6 105 25.4 22.4 113
BONE SPRINGS DIV 9350 19.3 17.5 110 18.8 16.0 118
EVENING STAR 9200 32.4 31.9 102 35.6 27.3 130
GRAVE SPRINGS 8550 10.9 10.5 104 11.1 11.1 100
KIRWIN 9550 13.2 12.3 107 15.8 12.3 128
MARQUETTE 8760 8.4 10.4 81 10.9 11.2 97
MIDDLE POWDER 7760 12.5 13.8 91 10.0 13.6 74
OWL CREEK 8975 6.1 5.4 113 7.3 6.7 109
POWDER RIVER PASS 9480 13.3 11.8 113 15.4 13.6 113
SHELL CREEK 9580 17.0 16.0 106 16.4 14.6 112
SYLVAN LAKE 8420 23.2 24.1 96 28.0 22.5 124
SYLVAN ROAD 7120 14.1 12.5 113 22.7 18.8 121
TIMBER CREEK 7950 5.3 5.7 93 8.9 8.4 106
YOUNTS PEAK 8350 18.2 18.0 101 18.9 17.3 109
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Basin wide percent of average 103 111
SHOSHONE RIVER
BLACKWATER 9780 27.8 26.6 105 25.4 22.4 113
EVENING STAR 9200 32.4 31.9 102 35.6 27.3 130
KIRWIN 9550 13.2 12.3 107 15.8 12.3 128
MARQUETTE 8760 8.4 10.4 81 10.9 11.2 97
SYLVAN LAKE 8420 23.2 24.1 96 28.0 22.5 124
SYLVAN ROAD 7120 14.1 12.5 113 22.7 18.8 121
YOUNTS PEAK 8350 18.2 18.0 101 18.9 17.3 109
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Basin wide percent of average 101 119
POWDER-TONGUE
BEAR TRAP MEADOW 8200 9.9 4.8 206 9.9 9.2 108
BIG GOOSE 7990 10.6 12.2 87 13.4 10.2 131
BONE SPRINGS DIV 9350 19.3 17.5 110 18.8 16.0 118
BURGESS JUNCTION 7880 14.0 13.1 107 15.4 13.4 115
CLOUD PEAK RESERVOIR 9860 17.4 15.0 116 16.8 14.4 117
DOME LAKE 8880 13.2 13.9 95 16.3 14.5 112
GRAVE SPRINGS 8550 10.9 10.5 104 11.1 11.1 100
HANSEN SAWMILL 8360 7.9 6.3 125 10.1 9.2 110
MIDDLE POWDER 7760 12.5 13.8 91 10.0 13.6 74
POWDER RIVER PASS 9480 13.3 11.8 113 15.4 13.6 113
SUCKER CREEK 8880 16.4 13.4 122 18.3 15.0 122
TIE CREEK 6870 8.9 5.4 165 13.1 11.2 117
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Basin wide percent of average 112 111
BELLE FOURCHE
BLIND PARK 6890 9.7 7.9 123 12.7 12.1 105
COLE CANYON 5910 7.7 7.2 107 9.2 7.5 123
NORTH RAPID CREEK 6130 10.7 8.9 120 11.0 9.4 117
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Basin wide percent of average 117 113
UPPER N. PLATTE RIVER
COLUMBINE 9160 30.2 24.8 122 31.1 26.9 116
DIVIDE PEAK 8880 26.7 20.8 128 26.2 22.2 118
ELK RIVER 8700 29.5 19.9 148 25.5 21.0 121
JOE WRIGHT 10120 27.4 23.3 118 29.7 26.9 110
NORTH FRENCH CREEK 10130 34.9 32.2 108 32.9 26.6 124
OLD BATTLE 10000 38.0 34.4 110 40.6 36.8 110
SAGE CREEK BASIN 7850 18.9 12.1 156 19.0 12.9 147
SOUTH BRUSH CREEK 8440 16.6 13.4 124 19.0 17.9 106
TOWER 10500 47.9 49.1 98 33.6 41.2 82
WEBBER SPRINGS 9250 30.8 26.2 118 34.0 28.6 119
WILLOW CREEK PASS 9540 19.4 13.4 145 18.4 14.0 131
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Basin wide percent of average 119 113
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 24.1 26.1 92 24.9 24.1 103
CASPER MTN. 7900 16.0 16.5 97 16.0 16.3 98
DEADMAN HILL 10220 20.6 18.1 114 21.7 18.5 117
DEER PARK 9700 17.1 16.8 102 21.7 23.9 91
LAPRELE CREEK 8375 9.7 10.5 92 13.1 14.0 94
RENO HILL 8400 16.1 15.8 102 18.2 17.0 107
ROACH 9700 22.0 18.3 120 24.6 20.1 122
SAND LAKE 10050 33.3 34.7 96 32.8 26.2 125
SOUTH PASS 9040 15.9 17.7 90 18.8 20.1 94
WINDY PEAK 7900 10.3 8.2 126 11.7 11.6 101
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Basin wide percent of average 101 106
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 18.5 9.1 203 18.3 17.0 108
DIVIDE PEAK 8880 26.7 20.8 128 26.2 22.2 118
OLD BATTLE 10000 38.0 34.4 110 40.6 36.8 110
SANDSTONE RS 8150 20.4 13.7 149 23.8 19.9 120
WHISKEY PARK 8950 37.3 30.7 121 37.8 30.7 123
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Basin wide percent of average 130 116
UPPER GREEN RIVER
BIG SANDY OPENING 9080 14.3 15.3 93 14.3 14.4 99
BLIND BULL SUM 8650 27.3 28.9 94 19.2 23.6 81
EAST RIM DIVIDE 7930 10.1 13.9 73 12.0 12.8 94
ELKHART PARK G.S. 9400 12.0 14.0 86 12.5 14.4 87
GROS VENTRE SUMMIT 8750 13.6 14.6 93 15.0 13.9 108
GUNSIGHT PASS 9820 13.0 -M * 15.3 -M *
KENDALL R.S. 7740 12.8 13.8 93 14.9 15.4 97
LOOMIS PARK 8240 17.1 17.2 99 19.0 18.5 103
NEW FORK LAKE 8340 10.1 11.4 89 10.1 12.2 83
SNIDER BASIN 8060 14.7 15.0 98 15.4 17.3 89
SPRING CREEK DIVIDE 9000 23.4 28.4 82 25.4 28.3 90
TRIPLE PEAK 8500 27.4 25.9 106 30.6 26.5 115
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Basin wide percent of average 92 95
LOWER GREEN RIVER
HAMS FORK 7840 13.3 10.3 129 11.2 13.2 85
HEWINTA 9519 17.9 12.4 144 18.6 16.0 116
HICKERSON PARK 9145 9.1 8.4 108 11.2 8.8 127
HOLE-IN-ROCK 9150 8.0 7.4 108 11.6 8.3 140
INDIAN CREEK 9425 28.0 29.5 95 -M 27.4 *
KELLEY R.S. 8180 16.8 17.3 97 19.2 21.9 88
STEEL CREEK PARK 10200 18.2 17.1 106 20.7 18.0 115
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Basin wide percent of average 109 107
UPPER BEAR RIVER
BUG LAKE 7950 19.1 21.8 88 18.0 20.6 87
HAYDEN FORK 9212 22.4 16.7 134 25.0 22.8 110
KELLEY R.S. 8180 16.8 17.3 97 19.2 21.9 88
LILY LAKE 9156 17.1 14.6 117 19.6 19.1 103
MONTE CRISTO 8960 31.6 30.6 103 28.1 27.5 102
SALT RIVER SUMMIT 7760 14.6 14.6 100 17.1 20.1 85
TRIAL LAKE 9992 24.2 26.3 92 26.5 26.9 99
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Basin wide percent of average 103 97
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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.