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 THURSDAY: APRIL 22 , 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 20.9 13.7 153 28.7 24.5 118
COTTONWOOD CREEK 7600 24.0 21.9 110 30.0 27.5 110
GRANITE CREEK 6770 20.5 15.7 131 24.2 26.0 94
GRASSY LAKE 7265 42.9 36.2 119 44.5 40.8 110
GROS VENTRE SUMMIT 8775 16.4 15.1 109 16.9 17.7 96
LEWIS LAKE DIVIDE 7860 41.3 35.8 116 42.7 41.5 103
PHILLIPS BENCH 8200 35.2 30.4 116 33.9 32.8 104
SALT RIVER SUMMIT 7600 15.2 12.5 122 19.5 18.7 105
SNAKE RIVER STATION 6920 19.9 17.7 113 27.9 28.7 98
SPRING CREEK DIVIDE 9000 32.2 29.5 109 30.4 30.0 102
THUMB DIVIDE 7980 23.5 16.4 144 24.4 23.0 107
TOGWOTEE PASS 9580 -M 27.7 * 31.0 31.2 100
TWO OCEAN PLATEAU 9360 40.8 27.2 151 34.2 33.8 101
WILLOW CREEK 8450 32.8 31.9 104 40.8 35.3 116
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Basin wide percent of average 121 105
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 27.9 25.9 108 25.2 20.4 124
BLACK BEAR 7950 48.2 40.2 120 -M 45.0 *
CANYON 7940 17.7 12.5 142 20.5 15.9 130
FISHER CREEK 9100 38.4 38.3 101 39.2 40.8 97
MADISON PLATEAU 7750 -M 24.9 * 34.3 29.0 118
NORTHEAST ENTRANCE 7350 10.5 7.8 136 15.0 13.5 112
PARKER PEAK 9400 26.0 23.5 111 -M 17.5 *
SYLVAN LAKE 8420 27.9 23.9 117 30.5 21.5 142
THUMB DIVIDE 7980 23.5 16.4 144 24.4 23.0 107
TWO OCEAN PLATEAU 9360 40.8 27.2 151 34.2 33.8 101
WHISKEY CREEK 6800 21.9 16.9 129 26.0 24.2 108
WHITE MILL 8700 29.4 26.2 113 26.4 31.5 84
WOLVERINE 7650 12.0 10.2 118 13.9 14.5 96
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Basin wide percent of average 121 108
WIND RIVER
BURROUGHS CREEK 8750 17.7 14.4 124 19.5 18.7 105
COLD SPRINGS 9630 9.2 8.0 117 13.6 12.5 110
DEER PARK 9700 18.5 -M * 24.7 -M *
HOBBS PARK 10100 -M 17.2 * -M 16.4 *
LITTLE WARM 9620 -M 12.2 * -M 15.5 *
SOUTH PASS 9040 18.2 17.9 102 21.7 19.7 111
ST. LAWRENCE ALT 8620 8.0 6.5 125 12.1 12.0 102
TOGWOTEE PASS 9580 -M 27.7 * 31.0 31.2 100
TOWNSEND CREEK 8700 11.2 10.1 111 15.9 14.7 108
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Basin wide percent of average 114 105
BIGHORN BASIN
BALD MTN. 9375 22.5 23.2 98 20.9 19.9 106
BEAR TRAP MEADOW 7900 1.4 5.8 23 11.5 10.0 116
BLACKWATER 9780 32.8 25.2 131 27.0 19.9 136
BONE SPRINGS DIV 9350 20.5 18.4 113 20.2 17.4 117
EVENING STAR 9200 35.0 30.0 117 36.8 25.0 147
GRAVE SPRINGS 8550 10.7 11.1 97 14.0 11.6 121
KIRWIN 9550 13.9 11.5 122 15.7 12.6 125
MARQUETTE 8760 12.0 8.7 137 13.0 12.5 105
MIDDLE POWDER 7760 16.7 14.2 117 20.2 14.0 144
OWL CREEK 8975 7.0 4.3 165 8.1 7.6 107
POWDER RIVER PASS 9480 13.0 11.2 116 17.4 13.9 126
SHELL CREEK 9580 18.4 16.7 111 17.2 15.1 114
SYLVAN LAKE 8420 27.9 23.9 117 30.5 21.5 142
SYLVAN ROAD 8120 -M 9.6 * -M 17.9 *
TIMBER CREEK 7950 6.5 6.5 102 9.7 9.2 106
YOUNTS PEAK 8350 22.4 18.4 122 20.7 18.7 111
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Basin wide percent of average 114 124
SHOSHONE RIVER
BLACKWATER 9780 32.8 25.2 131 27.0 19.9 136
EVENING STAR 9200 35.0 30.0 117 36.8 25.0 147
KIRWIN 9550 13.9 11.5 122 15.7 12.6 125
MARQUETTE 8760 12.0 8.7 137 13.0 12.5 105
SYLVAN LAKE 8420 27.9 23.9 117 30.5 21.5 142
SYLVAN ROAD 8120 -M 9.6 * -M 17.9 *
YOUNTS PEAK 8350 22.4 18.4 122 20.7 18.7 111
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Basin wide percent of average 123 131
POWDER-TONGUE
BEAR TRAP MEADOW 7900 1.4 5.8 23 11.5 10.0 116
BIG GOOSE 7990 9.9 -M * 14.2 -M *
BONE SPRINGS DIV 9350 20.5 18.4 113 20.2 17.4 117
BURGESS JUNCTION 7880 12.2 13.2 93 14.4 13.6 106
CLOUD PEAK RESERVOIR 9860 20.0 17.2 117 18.7 16.0 117
DOME LAKE 8880 -M 15.0 * 14.4 15.5 93
GRAVE SPRINGS 8550 10.7 11.1 97 14.0 11.6 121
HANSEN SAWMILL 8760 4.8 7.3 66 11.1 9.6 116
MIDDLE POWDER 7760 16.7 14.2 117 20.2 14.0 144
POWDER RIVER PASS 9480 13.0 11.2 116 17.4 13.9 126
SUCKER CREEK 8880 13.7 13.6 101 17.4 15.5 112
TIE CREEK 6870 -M -M * -M 13.0 *
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Basin wide percent of average 101 116
BELLE FOURCHE
BLIND PARK 6890 3.8 10.9 36 17.7 12.7 140
NORTH RAPID CREEK 6130 5.0 -M * 16.0 -M *
WARREN PEAK 6520 10.7 10.9 100 12.6 9.7 130
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Basin wide percent of average 68 136
UPPER N. PLATTE RIVER
COLUMBINE 9400 17.4 23.4 74 24.7 27.2 91
DIVIDE PEAK 8800 21.2 20.9 102 27.7 26.0 107
ELK RIVER 8700 15.0 18.7 81 24.4 21.4 115
JOE WRIGHT 10120 22.4 24.5 92 28.9 28.9 100
NORTH FRENCH CREEK 10100 35.2 28.9 122 33.5 26.7 126
OLD BATTLE 10000 33.8 36.9 92 40.3 34.2 118
SOUTH BRUSH CREEK 8400 10.5 12.0 88 21.5 19.4 111
TOWER 10500 49.8 50.0 100 42.3 41.3 103
WEBBER SPRINGS 9200 21.2 27.5 78 29.5 29.0 102
WILLOW CREEK PASS 9540 13.5 13.5 100 13.5 14.6 92
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Basin wide percent of average 94 107
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 16.9 29.0 59 25.7 22.5 114
CASPER MTN. 7900 14.7 18.5 80 20.4 17.4 117
DEADMAN HILL 10220 18.4 18.4 100 19.7 19.9 99
DEER PARK 9700 18.5 -M * 24.7 -M *
LAPRELE CREEK 8320 -M 8.5 * 17.4 14.0 126
RENO HILL 8400 17.2 14.6 118 22.9 21.5 107
ROACH 9700 18.7 18.2 103 23.5 24.4 97
SAND LAKE 10080 40.8 36.4 113 32.8 23.5 140
SOUTH PASS 9040 18.2 17.9 102 21.7 19.7 111
WINDY PEAK 7840 6.8 8.7 78 14.5 11.5 128
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Basin wide percent of average 94 114
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 7.5 8.4 90 19.4 17.7 111
DIVIDE PEAK 8800 21.2 20.9 102 27.7 26.0 107
OLD BATTLE 10000 33.8 36.9 92 40.3 34.2 118
SANDSTONE RS 8150 11.4 13.0 88 22.7 21.7 105
WHISKEY PARK 8950 29.5 30.4 98 32.8 32.3 102
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Basin wide percent of average 95 109
UPPER GREEN RIVER
BIG SANDY OPENING 9100 16.2 14.9 109 16.5 18.0 92
BLIND BULL SUM 8650 30.2 27.4 110 23.5 26.4 90
EAST RIM DIVIDE 7930 14.5 15.0 97 15.0 16.9 90
ELKHART PARK G.S. 9400 -M 14.6 * -M 17.7 *
GROS VENTRE SUMMIT 8775 16.4 15.1 109 16.9 17.7 96
KENDALL R.S. 7740 14.2 12.1 118 17.7 17.2 103
LOOMIS PARK 8240 -M 16.2 * 21.4 20.9 103
NEW FORK LAKE 8340 12.5 10.0 125 13.0 16.0 82
SNIDER BASIN 8250 17.7 14.5 122 18.9 16.7 114
SPRING CREEK DIVIDE 9000 32.2 29.5 109 30.4 30.0 102
TRIPLE PEAK 8500 28.7 26.2 110 32.3 34.2 95
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Basin wide percent of average 111 97
LOWER GREEN RIVER
HAMS FORK 7840 11.0 5.8 188 12.5 14.9 85
HEWINTA 9500 10.5 7.5 142 15.9 15.5 103
HICKERSON PARK 9150 4.8 5.0 95 11.4 11.5 99
HOLE-IN-ROCK 9150 7.3 4.5 161 11.5 11.5 100
INDIAN CREEK 9425 32.4 29.9 109 27.2 28.5 96
KELLEY R.S. 8180 16.2 16.5 99 20.2 20.7 98
STEEL CREEK PARK 10100 16.5 18.4 90 18.7 15.2 123
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Basin wide percent of average 113 100
UPPER BEAR RIVER
BUG LAKE 7950 21.9 18.4 120 22.0 21.9 101
HAYDEN FORK 9400 11.9 9.0 132 22.4 21.9 102
KELLEY R.S. 8180 16.2 16.5 99 20.2 20.7 98
LILY LAKE 9050 11.7 11.1 106 19.7 17.2 116
MONTE CRISTO 8960 27.9 28.0 100 28.7 29.0 99
SALT RIVER SUMMIT 7600 15.2 12.5 122 19.5 18.7 105
TRIAL LAKE 9960 20.5 25.2 82 23.9 27.2 89
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Basin wide percent of average 104 100
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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.