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 TUESDAY: APRIL 6 , 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 23.9 17.2 139 27.5 23.4 119
COTTONWOOD CREEK 7600 25.4 24.2 106 28.4 26.2 109
GRANITE CREEK 6770 21.9 18.5 119 23.4 24.5 96
GRASSY LAKE 7265 43.3 36.9 118 40.9 38.8 106
GROS VENTRE SUMMIT 8775 16.2 16.0 102 16.0 16.7 96
LEWIS LAKE DIVIDE 7860 41.2 36.2 114 40.3 39.4 103
PHILLIPS BENCH 8200 33.3 30.0 111 32.3 31.2 104
SALT RIVER SUMMIT 7600 16.4 14.4 115 18.9 17.7 107
SNAKE RIVER STATION 6920 22.0 18.9 118 25.9 27.2 96
SPRING CREEK DIVIDE 9000 31.2 28.7 109 28.9 28.7 101
THUMB DIVIDE 7980 23.9 17.4 139 22.9 21.7 106
TOGWOTEE PASS 9580 -M 25.9 * 28.9 29.5 98
TWO OCEAN PLATEAU 9360 36.8 26.9 138 31.7 32.0 99
WILLOW CREEK 8450 33.8 31.0 110 38.4 33.5 115
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Basin wide percent of average 117 104
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 26.4 24.5 108 23.5 18.9 125
BLACK BEAR 7950 51.4 39.3 132 -M 42.3 *
CANYON 7940 18.2 13.4 137 19.4 14.9 132
FISHER CREEK 9100 40.7 36.8 111 37.3 38.0 98
MADISON PLATEAU 7750 -M 25.2 * 32.3 27.4 119
NORTHEAST ENTRANCE 7350 11.4 9.2 123 14.2 12.4 116
PARKER PEAK 9400 23.9 22.4 107 -M 16.2 *
SYLVAN LAKE 8420 26.7 22.9 117 28.0 19.9 141
THUMB DIVIDE 7980 23.9 17.4 139 22.9 21.7 106
TWO OCEAN PLATEAU 9360 36.8 26.9 138 31.7 32.0 99
WHISKEY CREEK 6800 21.2 17.9 120 24.4 22.7 108
WHITE MILL 8700 28.4 25.4 112 24.9 29.4 85
WOLVERINE 7650 11.7 11.9 100 13.0 13.4 97
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Basin wide percent of average 120 109
WIND RIVER
BURROUGHS CREEK 8750 17.2 15.2 114 18.5 17.2 108
COLD SPRINGS 9630 9.5 8.6 110 13.0 11.1 118
DEER PARK 9700 17.7 -M * 22.9 -M *
HOBBS PARK 10100 18.7 15.7 119 17.4 14.9 117
LITTLE WARM 9620 15.0 12.4 122 16.5 14.0 119
SOUTH PASS 9040 18.9 16.9 112 20.0 17.7 113
ST. LAWRENCE ALT 8620 7.8 7.5 105 11.5 10.6 108
TOGWOTEE PASS 9580 -M 25.9 * 28.9 29.5 98
TOWNSEND CREEK 8700 11.2 10.1 111 14.5 13.1 110
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Basin wide percent of average 114 110
BIGHORN BASIN
BALD MTN. 9375 20.4 21.2 97 18.9 18.0 106
BEAR TRAP MEADOW 7900 5.1 7.1 72 10.1 8.6 118
BLACKWATER 9780 31.4 23.4 135 25.9 18.7 139
BONE SPRINGS DIV 9350 17.4 17.2 102 16.9 15.7 108
EVENING STAR 9200 33.8 28.0 121 35.0 23.4 151
GRAVE SPRINGS 8550 8.7 10.0 87 11.7 10.1 116
KIRWIN 9550 13.1 10.5 126 15.0 11.4 132
MARQUETTE 8760 9.1 8.5 109 9.9 10.2 97
MIDDLE POWDER 7760 11.7 12.9 92 16.5 12.5 134
OWL CREEK 8975 7.1 4.8 152 7.3 6.6 110
POWDER RIVER PASS 9480 12.6 11.2 113 15.6 12.1 129
SHELL CREEK 9580 17.2 15.5 111 15.9 13.6 117
SYLVAN LAKE 8420 26.7 22.9 117 28.0 19.9 141
SYLVAN ROAD 8120 -M 12.0 * -M 16.7 *
TIMBER CREEK 7950 5.6 6.5 87 7.6 7.6 100
YOUNTS PEAK 8350 21.7 17.7 123 19.4 17.2 113
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Basin wide percent of average 112 124
SHOSHONE RIVER
BLACKWATER 9780 31.4 23.4 135 25.9 18.7 139
EVENING STAR 9200 33.8 28.0 121 35.0 23.4 151
KIRWIN 9550 13.1 10.5 126 15.0 11.4 132
MARQUETTE 8760 9.1 8.5 109 9.9 10.2 97
SYLVAN LAKE 8420 26.7 22.9 117 28.0 19.9 141
SYLVAN ROAD 8120 -M 12.0 * -M 16.7 *
YOUNTS PEAK 8350 21.7 17.7 123 19.4 17.2 113
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Basin wide percent of average 123 133
POWDER-TONGUE
BEAR TRAP MEADOW 7900 5.1 7.1 72 10.1 8.6 118
BIG GOOSE 7990 7.3 -M * 11.0 -M *
BONE SPRINGS DIV 9350 17.4 17.2 102 16.9 15.7 108
BURGESS JUNCTION 7880 9.5 12.2 78 11.2 12.0 94
CLOUD PEAK RESERVOIR 9860 16.0 15.6 102 14.5 14.0 103
DOME LAKE 8880 -M 14.2 * 12.0 13.9 87
GRAVE SPRINGS 8550 8.7 10.0 87 11.7 10.1 116
HANSEN SAWMILL 8760 5.3 7.3 73 9.1 8.5 109
MIDDLE POWDER 7760 11.7 12.9 92 16.5 12.5 134
POWDER RIVER PASS 9480 12.6 11.2 113 15.6 12.1 129
SUCKER CREEK 8880 11.2 12.6 89 13.6 13.7 100
TIE CREEK 6870 3.3 -M * 9.5 11.5 82
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Basin wide percent of average 92 107
BELLE FOURCHE
BLIND PARK 6890 7.3 11.4 65 16.4 10.7 153
NORTH RAPID CREEK 6130 6.3 -M * 13.7 -M *
WARREN PEAK 6520 11.2 11.4 100 15.4 8.5 183
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Basin wide percent of average 82 166
UPPER N. PLATTE RIVER
COLUMBINE 9400 18.9 24.9 76 22.0 25.2 88
DIVIDE PEAK 8800 19.7 21.5 92 24.9 23.7 106
ELK RIVER 8700 16.5 20.2 82 22.4 19.7 114
JOE WRIGHT 10120 20.4 22.9 89 26.5 25.9 103
NORTH FRENCH CREEK 10100 30.2 26.7 114 29.2 24.4 120
OLD BATTLE 10000 29.9 33.5 89 36.0 31.2 116
SOUTH BRUSH CREEK 8400 11.0 13.4 83 19.9 17.2 116
TOWER 10500 44.7 46.8 96 39.0 37.4 105
WEBBER SPRINGS 9200 19.5 28.5 69 26.5 26.2 102
WILLOW CREEK PASS 9540 12.2 12.6 97 12.2 13.1 94
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Basin wide percent of average 89 107
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 15.2 27.4 56 22.7 20.2 112
CASPER MTN. 7900 11.6 17.5 67 16.9 15.0 114
DEADMAN HILL 10220 16.2 17.2 95 17.4 17.5 99
DEER PARK 9700 17.7 -M * 22.9 -M *
LAPRELE CREEK 8320 -M 10.5 * 14.9 12.4 121
RENO HILL 8400 14.5 14.9 98 19.0 19.9 96
ROACH 9700 15.5 17.7 88 19.7 21.9 90
SAND LAKE 10080 35.4 34.2 104 29.0 21.2 138
SOUTH PASS 9040 18.9 16.9 112 20.0 17.7 113
WINDY PEAK 7840 7.1 9.0 79 13.5 10.0 135
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Basin wide percent of average 87 112
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 11.5 11.2 103 17.7 16.0 112
DIVIDE PEAK 8800 19.7 21.5 92 24.9 23.7 106
OLD BATTLE 10000 29.9 33.5 89 36.0 31.2 116
SANDSTONE RS 8150 12.7 15.2 84 20.9 19.4 108
WHISKEY PARK 8950 26.9 29.7 91 29.7 29.2 102
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Basin wide percent of average 91 109
UPPER GREEN RIVER
BIG SANDY OPENING 9100 16.5 15.0 111 15.7 17.0 93
BLIND BULL SUM 8650 26.7 30.4 89 22.9 25.0 92
EAST RIM DIVIDE 7930 14.2 14.5 99 14.6 16.0 92
ELKHART PARK G.S. 9400 14.4 14.4 100 15.0 16.7 90
GROS VENTRE SUMMIT 8775 16.2 16.0 102 16.0 16.7 96
KENDALL R.S. 7740 15.1 14.2 107 16.7 16.2 103
LOOMIS PARK 8240 -M 17.4 * 20.7 19.7 106
NEW FORK LAKE 8340 12.5 11.1 112 12.0 15.1 80
SNIDER BASIN 8250 18.0 15.2 119 18.4 15.9 117
SPRING CREEK DIVIDE 9000 31.2 28.7 109 28.9 28.7 101
TRIPLE PEAK 8500 30.7 26.4 117 30.7 32.3 95
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Basin wide percent of average 106 97
LOWER GREEN RIVER
HAMS FORK 7840 14.5 10.0 146 12.1 14.0 87
HEWINTA 9500 12.6 10.7 118 14.9 13.7 109
HICKERSON PARK 9150 5.5 6.8 81 10.2 10.0 103
HOLE-IN-ROCK 9150 6.8 6.5 105 10.6 10.0 107
INDIAN CREEK 9425 31.2 29.5 106 26.0 27.2 96
KELLEY R.S. 8180 17.4 17.5 100 19.2 19.7 98
STEEL CREEK PARK 10100 15.2 17.2 89 17.2 13.5 129
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Basin wide percent of average 106 103
UPPER BEAR RIVER
BUG LAKE 7950 23.2 20.9 111 20.9 20.2 103
HAYDEN FORK 9400 15.5 14.5 107 21.0 19.9 107
KELLEY R.S. 8180 17.4 17.5 100 19.2 19.7 98
LILY LAKE 9050 12.1 13.4 91 18.5 15.5 121
MONTE CRISTO 8960 26.9 29.7 91 26.7 26.5 101
SALT RIVER SUMMIT 7600 16.4 14.4 115 18.9 17.7 107
TRIAL LAKE 9960 21.4 25.4 84 22.4 24.9 91
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Basin wide percent of average 98 103
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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.