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 SATURDAY: APRIL 17 , 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 23.2 15.5 151 28.4 24.2 118
COTTONWOOD CREEK 7600 25.4 22.9 111 29.4 27.2 109
GRANITE CREEK 6770 22.2 17.2 130 24.0 25.5 95
GRASSY LAKE 7265 43.4 37.4 117 42.5 40.3 106
GROS VENTRE SUMMIT 8775 -M 15.9 * -M 17.4 *
LEWIS LAKE DIVIDE 7860 41.5 36.5 114 41.3 40.8 101
PHILLIPS BENCH 8200 34.4 30.9 112 33.7 32.3 105
SALT RIVER SUMMIT 7600 16.5 13.5 123 19.4 18.4 105
SNAKE RIVER STATION 6920 -M 18.4 * -M 28.2 *
SPRING CREEK DIVIDE 9000 32.3 29.5 110 30.2 29.7 102
THUMB DIVIDE 7980 24.2 17.2 141 23.4 22.7 104
TOGWOTEE PASS 9580 -M 27.2 * 30.7 30.7 100
TWO OCEAN PLATEAU 9360 38.2 26.9 143 31.9 33.3 97
WILLOW CREEK 8450 34.9 31.9 110 39.9 34.8 115
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Basin wide percent of average 121 105
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 27.0 25.7 106 24.4 19.9 123
BLACK BEAR 7950 51.4 40.3 128 -M 44.2 *
CANYON 7940 18.9 13.2 144 20.2 15.5 131
FISHER CREEK 9100 41.3 38.0 109 38.2 39.9 96
MADISON PLATEAU 7750 -M 25.4 * 33.7 28.5 118
NORTHEAST ENTRANCE 7350 12.2 8.7 141 14.6 13.0 113
PARKER PEAK 9400 25.0 23.4 108 -M 17.2 *
SYLVAN LAKE 8420 27.4 23.9 115 29.2 21.0 140
THUMB DIVIDE 7980 24.2 17.2 141 23.4 22.7 104
TWO OCEAN PLATEAU 9360 38.2 26.9 143 31.9 33.3 97
WHISKEY CREEK 6800 -M 17.9 * -M 23.7 *
WHITE MILL 8700 28.9 25.9 112 25.9 30.9 84
WOLVERINE 7650 13.4 11.5 117 13.5 14.1 96
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Basin wide percent of average 121 107
WIND RIVER
BURROUGHS CREEK 8750 -M 15.1 * -M 18.2 *
COLD SPRINGS 9630 10.5 8.5 124 13.4 12.0 111
DEER PARK 9700 18.9 -M * 24.4 -M *
HOBBS PARK 10100 19.7 16.7 118 18.2 16.0 115
LITTLE WARM 9620 15.7 13.2 119 17.5 15.0 117
SOUTH PASS 9040 20.2 17.7 114 21.4 19.0 113
ST. LAWRENCE ALT 8620 8.5 7.0 122 12.0 11.5 105
TOGWOTEE PASS 9580 -M 27.2 * 30.7 30.7 100
TOWNSEND CREEK 8700 11.6 10.4 113 15.5 14.2 109
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Basin wide percent of average 118 109
BIGHORN BASIN
BALD MTN. 9375 21.9 22.7 97 19.9 19.4 104
BEAR TRAP MEADOW 7900 3.7 6.6 55 11.0 9.5 115
BLACKWATER 9780 32.2 24.9 129 26.5 19.5 136
BONE SPRINGS DIV 9350 20.7 18.2 114 19.2 16.9 114
EVENING STAR 9200 34.7 29.5 118 35.8 24.5 147
GRAVE SPRINGS 8550 10.5 10.9 98 13.6 11.1 123
KIRWIN 9550 13.9 11.2 124 15.5 12.2 127
MARQUETTE 8760 11.0 8.7 126 11.6 11.7 100
MIDDLE POWDER 7760 16.7 13.9 122 19.9 13.5 147
OWL CREEK 8975 7.6 4.6 166 7.5 7.3 103
POWDER RIVER PASS 9480 13.0 11.5 113 16.7 13.4 125
SHELL CREEK 9580 18.0 16.4 110 16.7 14.6 114
SYLVAN LAKE 8420 27.4 23.9 115 29.2 21.0 140
SYLVAN ROAD 8120 -M 10.5 * -M 17.5 *
TIMBER CREEK 7950 6.5 6.6 97 8.9 8.7 102
YOUNTS PEAK 8350 22.4 18.4 122 20.2 18.2 112
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Basin wide percent of average 114 123
SHOSHONE RIVER
BLACKWATER 9780 32.2 24.9 129 26.5 19.5 136
EVENING STAR 9200 34.7 29.5 118 35.8 24.5 147
KIRWIN 9550 13.9 11.2 124 15.5 12.2 127
MARQUETTE 8760 11.0 8.7 126 11.6 11.7 100
SYLVAN LAKE 8420 27.4 23.9 115 29.2 21.0 140
SYLVAN ROAD 8120 -M 10.5 * -M 17.5 *
YOUNTS PEAK 8350 22.4 18.4 122 20.2 18.2 112
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Basin wide percent of average 122 130
POWDER-TONGUE
BEAR TRAP MEADOW 7900 3.7 6.6 55 11.0 9.5 115
BIG GOOSE 7990 9.7 -M * 13.5 -M *
BONE SPRINGS DIV 9350 20.7 18.2 114 19.2 16.9 114
BURGESS JUNCTION 7880 11.9 13.0 91 13.4 13.1 102
CLOUD PEAK RESERVOIR 9860 19.7 17.0 116 17.7 15.5 115
DOME LAKE 8880 -M 15.0 * 13.6 15.0 91
GRAVE SPRINGS 8550 10.5 10.9 98 13.6 11.1 123
HANSEN SAWMILL 8760 5.1 7.6 68 10.1 9.2 110
MIDDLE POWDER 7760 16.7 13.9 122 19.9 13.5 147
POWDER RIVER PASS 9480 13.0 11.5 113 16.7 13.4 125
SUCKER CREEK 8880 13.5 13.5 101 16.4 15.0 109
TIE CREEK 6870 -M -M * -M 12.5 *
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Basin wide percent of average 103 115
BELLE FOURCHE
BLIND PARK 6890 6.6 11.5 58 17.0 12.1 141
NORTH RAPID CREEK 6130 6.8 -M * 14.7 -M *
WARREN PEAK 6520 12.5 11.5 110 11.2 9.4 121
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Basin wide percent of average 84 132
UPPER N. PLATTE RIVER
COLUMBINE 9400 18.4 24.2 77 23.4 26.5 88
DIVIDE PEAK 8800 22.2 21.5 104 26.9 25.4 107
ELK RIVER 8700 17.7 19.9 89 23.2 20.9 112
JOE WRIGHT 10120 21.7 24.4 90 28.2 27.9 102
NORTH FRENCH CREEK 10100 34.3 28.4 121 32.2 26.0 124
OLD BATTLE 10000 32.9 36.3 91 38.9 33.3 118
SOUTH BRUSH CREEK 8400 10.6 12.9 83 21.2 18.7 114
TOWER 10500 48.2 49.3 98 40.9 40.0 103
WEBBER SPRINGS 9200 20.9 28.4 74 28.9 28.2 103
WILLOW CREEK PASS 9540 13.4 13.5 99 12.5 14.1 88
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Basin wide percent of average 93 106
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 15.7 29.0 55 24.4 21.9 112
CASPER MTN. 7900 15.1 18.9 80 19.9 16.7 120
DEADMAN HILL 10220 17.7 18.0 99 18.5 19.2 97
DEER PARK 9700 18.9 -M * 24.4 -M *
LAPRELE CREEK 8320 .0 9.6 0 17.0 13.5 127
RENO HILL 8400 17.9 15.4 117 22.2 21.0 106
ROACH 9700 17.5 18.2 97 22.4 23.7 95
SAND LAKE 10080 39.8 35.9 111 31.9 22.9 140
SOUTH PASS 9040 20.2 17.7 114 21.4 19.0 113
WINDY PEAK 7840 7.6 9.2 83 14.6 11.0 133
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Basin wide percent of average 89 114
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 12.4 10.2 121 19.2 17.2 112
DIVIDE PEAK 8800 22.2 21.5 104 26.9 25.4 107
OLD BATTLE 10000 32.9 36.3 91 38.9 33.3 118
SANDSTONE RS 8150 15.4 14.7 105 22.2 21.0 106
WHISKEY PARK 8950 29.2 30.7 96 32.2 31.4 103
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Basin wide percent of average 99 109
UPPER GREEN RIVER
BIG SANDY OPENING 9100 16.7 15.4 110 16.2 17.7 91
BLIND BULL SUM 8650 30.7 30.0 103 23.4 25.9 90
EAST RIM DIVIDE 7930 14.5 15.0 97 15.0 16.5 91
ELKHART PARK G.S. 9400 15.0 15.0 101 15.7 17.4 91
GROS VENTRE SUMMIT 8775 -M 15.9 * -M 17.4 *
KENDALL R.S. 7740 15.5 12.9 122 17.4 16.9 103
LOOMIS PARK 8240 -M 16.7 * 21.2 20.5 104
NEW FORK LAKE 8340 13.5 10.5 128 12.9 15.7 82
SNIDER BASIN 8250 18.9 15.2 124 18.7 16.5 114
SPRING CREEK DIVIDE 9000 32.3 29.5 110 30.2 29.7 102
TRIPLE PEAK 8500 30.4 26.7 114 31.9 33.5 96
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Basin wide percent of average 111 97
LOWER GREEN RIVER
HAMS FORK 7840 13.5 5.8 233 12.5 14.5 86
HEWINTA 9500 12.7 8.6 148 15.5 15.0 104
HICKERSON PARK 9150 5.3 6.3 86 10.6 11.0 97
HOLE-IN-ROCK 9150 7.1 5.8 123 11.0 11.0 100
INDIAN CREEK 9425 31.9 30.4 105 26.9 28.0 97
KELLEY R.S. 8180 17.4 17.4 101 19.9 20.4 98
STEEL CREEK PARK 10100 16.0 18.2 89 17.9 14.6 123
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Basin wide percent of average 113 100
UPPER BEAR RIVER
BUG LAKE 7950 23.9 19.5 123 21.7 21.4 102
HAYDEN FORK 9400 14.7 10.4 143 22.0 21.2 104
KELLEY R.S. 8180 17.4 17.4 101 19.9 20.4 98
LILY LAKE 9050 12.6 12.5 102 19.2 16.7 116
MONTE CRISTO 8960 27.5 29.0 95 28.0 28.2 100
SALT RIVER SUMMIT 7600 16.5 13.5 123 19.4 18.4 105
TRIAL LAKE 9960 22.0 25.9 86 23.4 26.4 89
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Basin wide percent of average 106 101
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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.