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: APRIL 12 , 1999
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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 24.4 16.4 149 28.4 23.7 120
COTTONWOOD CREEK 7600 26.5 23.7 113 29.4 26.7 111
GRANITE CREEK 6770 22.4 18.2 124 23.7 25.2 95
GRASSY LAKE 7265 44.2 37.5 118 42.4 39.5 108
GROS VENTRE SUMMIT 8775 17.0 16.0 107 16.7 17.0 98
LEWIS LAKE DIVIDE 7860 41.9 36.7 115 41.3 40.3 103
PHILLIPS BENCH 8200 34.3 30.7 112 33.3 31.9 105
SALT RIVER SUMMIT 7600 17.0 14.0 122 19.4 18.0 108
SNAKE RIVER STATION 6920 22.5 18.7 121 26.5 27.7 96
SPRING CREEK DIVIDE 9000 32.3 29.2 111 29.5 29.2 102
THUMB DIVIDE 7980 -M 17.4 * -M 22.2 *
TOGWOTEE PASS 9580 -M 26.7 * 30.5 30.2 102
TWO OCEAN PLATEAU 9360 37.9 26.7 142 31.9 32.8 98
WILLOW CREEK 8450 35.7 31.5 114 39.3 34.3 115
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Basin wide percent of average 120 105
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 26.9 25.2 107 24.2 19.4 125
BLACK BEAR 7950 51.9 39.9 131 -M 43.3 *
CANYON 7940 18.9 13.5 140 20.2 15.1 134
FISHER CREEK 9100 41.3 37.7 110 37.8 39.0 97
MADISON PLATEAU 7750 -M 25.5 * 33.7 27.9 121
NORTHEAST ENTRANCE 7350 13.5 9.1 148 14.6 12.7 115
PARKER PEAK 9400 25.2 23.0 110 -M 16.7 *
SYLVAN LAKE 8420 27.5 23.7 117 29.2 20.5 142
THUMB DIVIDE 7980 -M 17.4 * -M 22.2 *
TWO OCEAN PLATEAU 9360 37.9 26.7 142 31.9 32.8 98
WHISKEY CREEK 6800 -M 18.2 * -M 23.2 *
WHITE MILL 8700 28.9 25.7 113 25.7 30.2 85
WOLVERINE 7650 13.0 11.9 111 13.1 13.7 96
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Basin wide percent of average 121 109
WIND RIVER
BURROUGHS CREEK 8750 17.7 15.4 116 19.2 17.7 108
COLD SPRINGS 9630 9.7 8.7 112 13.2 11.6 114
DEER PARK 9700 18.4 -M * 23.9 -M *
HOBBS PARK 10100 19.4 16.4 119 17.9 15.5 117
LITTLE WARM 9620 15.9 13.1 121 17.4 14.5 120
SOUTH PASS 9040 19.7 17.4 113 20.9 18.4 114
ST. LAWRENCE ALT 8620 7.5 7.3 103 11.5 11.1 104
TOGWOTEE PASS 9580 -M 26.7 * 30.5 30.2 102
TOWNSEND CREEK 8700 11.5 10.4 111 14.7 13.7 108
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Basin wide percent of average 115 110
BIGHORN BASIN
BALD MTN. 9375 21.2 22.0 96 19.4 18.7 104
BEAR TRAP MEADOW 7900 4.3 7.0 61 10.5 9.1 115
BLACKWATER 9780 31.9 24.4 132 26.4 19.2 139
BONE SPRINGS DIV 9350 19.4 17.9 109 18.0 16.4 111
EVENING STAR 9200 34.5 28.9 120 35.8 23.9 150
GRAVE SPRINGS 8550 10.5 10.5 100 13.2 10.7 124
KIRWIN 9550 13.7 11.0 126 15.4 11.9 130
MARQUETTE 8760 10.0 8.6 117 10.7 11.0 98
MIDDLE POWDER 7760 15.6 13.5 117 18.9 13.0 146
OWL CREEK 8975 7.3 4.8 154 7.3 7.0 106
POWDER RIVER PASS 9480 12.7 11.5 111 15.7 12.7 124
SHELL CREEK 9580 17.7 16.0 111 16.2 14.2 115
SYLVAN LAKE 8420 27.5 23.7 117 29.2 20.5 142
SYLVAN ROAD 8120 -M 11.2 * -M 17.2 *
TIMBER CREEK 7950 6.0 6.6 90 8.0 8.2 97
YOUNTS PEAK 8350 22.2 18.2 123 19.9 17.7 113
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Basin wide percent of average 114 124
SHOSHONE RIVER
BLACKWATER 9780 31.9 24.4 132 26.4 19.2 139
EVENING STAR 9200 34.5 28.9 120 35.8 23.9 150
KIRWIN 9550 13.7 11.0 126 15.4 11.9 130
MARQUETTE 8760 10.0 8.6 117 10.7 11.0 98
SYLVAN LAKE 8420 27.5 23.7 117 29.2 20.5 142
SYLVAN ROAD 8120 -M 11.2 * -M 17.2 *
YOUNTS PEAK 8350 22.2 18.2 123 19.9 17.7 113
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Basin wide percent of average 123 132
POWDER-TONGUE
BEAR TRAP MEADOW 7900 4.3 7.0 61 10.5 9.1 115
BIG GOOSE 7990 8.6 -M * 12.4 -M *
BONE SPRINGS DIV 9350 19.4 17.9 109 18.0 16.4 111
BURGESS JUNCTION 7880 11.0 12.7 87 12.5 12.6 100
CLOUD PEAK RESERVOIR 9860 18.0 16.4 110 16.4 14.7 111
DOME LAKE 8880 -M 14.6 * 12.6 14.5 88
GRAVE SPRINGS 8550 10.5 10.5 100 13.2 10.7 124
HANSEN SAWMILL 8760 5.1 7.5 69 9.4 8.9 106
MIDDLE POWDER 7760 15.6 13.5 117 18.9 13.0 146
POWDER RIVER PASS 9480 12.7 11.5 111 15.7 12.7 124
SUCKER CREEK 8880 12.4 13.1 94 15.0 14.5 104
TIE CREEK 6870 -M -M * -M 12.1 *
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Basin wide percent of average 99 112
BELLE FOURCHE
BLIND PARK 6890 7.0 11.5 61 16.9 11.5 149
NORTH RAPID CREEK 6130 6.8 -M * 14.5 -M *
WARREN PEAK 6520 12.5 11.5 108 11.6 9.0 131
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Basin wide percent of average 84 141
UPPER N. PLATTE RIVER
COLUMBINE 9400 19.0 24.7 78 23.4 25.9 90
DIVIDE PEAK 8800 21.5 21.7 100 26.5 24.5 109
ELK RIVER 8700 17.5 20.4 86 23.9 20.4 118
JOE WRIGHT 10120 21.4 23.9 90 27.7 27.0 103
NORTH FRENCH CREEK 10100 33.7 27.7 122 31.9 25.2 127
OLD BATTLE 10000 32.0 35.2 92 38.7 32.3 120
SOUTH BRUSH CREEK 8400 11.6 13.1 89 20.7 17.9 116
TOWER 10500 47.3 48.3 98 40.8 38.8 105
WEBBER SPRINGS 9200 20.0 28.7 70 28.0 27.2 103
WILLOW CREEK PASS 9540 12.6 13.2 96 12.9 13.7 94
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Basin wide percent of average 93 109
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 16.0 28.5 56 23.5 21.2 112
CASPER MTN. 7900 13.2 18.5 72 18.2 15.9 116
DEADMAN HILL 10220 16.9 17.7 97 17.9 18.4 97
DEER PARK 9700 18.4 -M * 23.9 -M *
LAPRELE CREEK 8320 -M 10.2 * 16.2 13.0 126
RENO HILL 8400 16.0 15.4 104 20.7 20.4 101
ROACH 9700 15.5 18.0 87 20.5 22.9 90
SAND LAKE 10080 37.8 35.3 108 30.5 22.0 139
SOUTH PASS 9040 19.7 17.4 113 20.9 18.4 114
WINDY PEAK 7840 7.6 9.2 83 14.1 10.5 135
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Basin wide percent of average 90 113
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 12.7 11.0 116 19.0 16.5 116
DIVIDE PEAK 8800 21.5 21.7 100 26.5 24.5 109
OLD BATTLE 10000 32.0 35.2 92 38.7 32.3 120
SANDSTONE RS 8150 14.1 15.4 93 22.4 20.4 110
WHISKEY PARK 8950 29.5 30.4 98 32.0 30.4 106
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Basin wide percent of average 97 112
UPPER GREEN RIVER
BIG SANDY OPENING 9100 17.0 15.4 112 16.2 17.4 94
BLIND BULL SUM 8650 28.7 30.9 94 23.4 25.5 92
EAST RIM DIVIDE 7930 14.5 14.9 98 15.0 16.2 92
ELKHART PARK G.S. 9400 15.0 14.9 102 15.7 17.0 93
GROS VENTRE SUMMIT 8775 17.0 16.0 107 16.7 17.0 98
KENDALL R.S. 7740 16.2 13.5 120 17.2 16.7 104
LOOMIS PARK 8240 -M 17.2 * 21.2 20.2 105
NEW FORK LAKE 8340 13.4 11.0 123 12.6 15.5 82
SNIDER BASIN 8250 18.5 15.5 121 18.7 16.2 116
SPRING CREEK DIVIDE 9000 32.3 29.2 111 29.5 29.2 102
TRIPLE PEAK 8500 31.4 26.7 118 31.9 33.0 97
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Basin wide percent of average 109 98
LOWER GREEN RIVER
HAMS FORK 7840 14.7 7.3 205 12.5 14.4 87
HEWINTA 9500 13.5 9.6 141 15.4 14.4 107
HICKERSON PARK 9150 6.0 6.8 90 10.5 10.6 100
HOLE-IN-ROCK 9150 7.3 6.3 115 11.0 10.6 104
INDIAN CREEK 9425 32.2 30.2 107 26.9 27.7 98
KELLEY R.S. 8180 18.2 17.7 103 20.0 20.0 100
STEEL CREEK PARK 10100 16.0 17.7 90 17.9 14.1 127
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Basin wide percent of average 113 103
UPPER BEAR RIVER
BUG LAKE 7950 24.0 20.4 119 21.7 20.9 105
HAYDEN FORK 9400 16.2 12.1 134 21.7 20.7 106
KELLEY R.S. 8180 18.2 17.7 103 20.0 20.0 100
LILY LAKE 9050 13.1 13.1 100 19.0 16.0 119
MONTE CRISTO 8960 28.4 29.5 96 28.2 27.4 103
SALT RIVER SUMMIT 7600 17.0 14.0 122 19.4 18.0 108
TRIAL LAKE 9960 22.2 25.9 87 23.4 25.7 92
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Basin wide percent of average 105 104
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-M = Missing data
* = Data may not provide a valid measure of conditions.
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.