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 19 , 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 21.4 14.7 146 28.4 24.4 117
COTTONWOOD CREEK 7600 24.9 22.5 111 29.4 27.4 108
GRANITE CREEK 6770 21.4 16.7 129 24.0 25.7 94
GRASSY LAKE 7265 43.4 36.9 118 42.5 40.4 106
GROS VENTRE SUMMIT 8775 16.7 15.5 108 16.7 17.4 96
LEWIS LAKE DIVIDE 7860 40.8 36.3 113 41.3 41.2 101
PHILLIPS BENCH 8200 35.0 30.7 115 33.8 32.5 104
SALT RIVER SUMMIT 7600 15.6 13.1 120 19.4 18.5 105
SNAKE RIVER STATION 6920 20.0 18.2 111 26.5 28.4 94
SPRING CREEK DIVIDE 9000 32.2 29.5 109 30.0 29.9 101
THUMB DIVIDE 7980 -M 16.9 * -M 22.7 *
TOGWOTEE PASS 9580 -M 27.4 * 30.7 30.9 100
TWO OCEAN PLATEAU 9360 38.5 26.9 144 32.9 33.4 99
WILLOW CREEK 8450 34.3 31.9 108 39.9 34.9 115
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Basin wide percent of average 118 103
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 27.2 25.7 106 24.5 20.0 123
BLACK BEAR 7950 47.0 40.3 117 -M 44.5 *
CANYON 7940 17.9 13.0 139 20.2 15.6 130
FISHER CREEK 9100 -M 38.3 * 38.3 40.3 96
MADISON PLATEAU 7750 -M 25.2 * 33.7 28.7 118
NORTHEAST ENTRANCE 7350 11.1 8.4 134 14.7 13.2 112
PARKER PEAK 9400 24.9 23.4 106 -M 17.4 *
SYLVAN LAKE 8420 27.2 23.9 114 29.2 21.2 138
THUMB DIVIDE 7980 -M 16.9 * -M 22.7 *
TWO OCEAN PLATEAU 9360 38.5 26.9 144 32.9 33.4 99
WHISKEY CREEK 6800 -M 17.5 * -M 23.9 *
WHITE MILL 8700 28.7 26.0 111 25.9 31.2 84
WOLVERINE 7650 13.0 11.0 120 13.4 14.4 94
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Basin wide percent of average 119 107
WIND RIVER
BURROUGHS CREEK 8750 17.4 14.9 117 19.2 18.4 105
COLD SPRINGS 9630 9.4 8.4 113 13.5 12.2 110
DEER PARK 9700 18.4 -M * 24.5 -M *
HOBBS PARK 10100 19.5 16.9 116 18.2 16.2 114
LITTLE WARM 9620 15.6 12.9 122 17.5 15.2 116
SOUTH PASS 9040 19.4 17.9 109 21.5 19.4 112
ST. LAWRENCE ALT 8620 8.1 6.8 121 12.0 11.6 103
TOGWOTEE PASS 9580 -M 27.4 * 30.7 30.9 100
TOWNSEND CREEK 8700 11.6 10.2 114 15.6 14.5 109
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Basin wide percent of average 116 108
BIGHORN BASIN
BALD MTN. 9375 21.7 22.9 96 20.2 19.5 104
BEAR TRAP MEADOW 7900 2.3 6.3 37 11.0 9.7 113
BLACKWATER 9780 32.3 25.0 130 26.4 19.7 135
BONE SPRINGS DIV 9350 -M 18.2 * 19.4 17.0 114
EVENING STAR 9200 34.5 29.7 117 35.8 24.7 145
GRAVE SPRINGS 8550 10.5 11.0 96 13.6 11.4 121
KIRWIN 9550 13.7 11.4 122 15.5 12.5 125
MARQUETTE 8760 11.0 8.7 127 12.0 12.0 100
MIDDLE POWDER 7760 16.7 14.0 120 19.7 13.7 144
OWL CREEK 8975 7.1 4.5 162 8.0 7.5 107
POWDER RIVER PASS 9480 12.7 11.5 112 16.7 13.5 124
SHELL CREEK 9580 17.4 16.5 106 16.7 14.9 113
SYLVAN LAKE 8420 27.2 23.9 114 29.2 21.2 138
SYLVAN ROAD 8120 16.9 10.1 167 20.2 17.7 115
TIMBER CREEK 7950 6.3 6.5 96 8.7 9.0 98
YOUNTS PEAK 8350 22.4 18.4 122 20.2 18.4 111
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Basin wide percent of average 115 122
SHOSHONE RIVER
BLACKWATER 9780 32.3 25.0 130 26.4 19.7 135
EVENING STAR 9200 34.5 29.7 117 35.8 24.7 145
KIRWIN 9550 13.7 11.4 122 15.5 12.5 125
MARQUETTE 8760 11.0 8.7 127 12.0 12.0 100
SYLVAN LAKE 8420 27.2 23.9 114 29.2 21.2 138
SYLVAN ROAD 8120 16.9 10.1 167 20.2 17.7 115
YOUNTS PEAK 8350 22.4 18.4 122 20.2 18.4 111
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Basin wide percent of average 125 127
POWDER-TONGUE
BEAR TRAP MEADOW 7900 2.3 6.3 37 11.0 9.7 113
BIG GOOSE 7990 9.4 -M * 13.6 -M *
BONE SPRINGS DIV 9350 -M 18.2 * 19.4 17.0 114
BURGESS JUNCTION 7880 11.7 13.1 90 13.5 13.4 101
CLOUD PEAK RESERVOIR 9860 19.5 17.2 115 18.2 15.6 117
DOME LAKE 8880 -M 15.0 * 13.6 15.2 90
GRAVE SPRINGS 8550 10.5 11.0 96 13.6 11.4 121
HANSEN SAWMILL 8760 4.8 7.5 65 10.1 9.5 108
MIDDLE POWDER 7760 16.7 14.0 120 19.7 13.7 144
POWDER RIVER PASS 9480 12.7 11.5 112 16.7 13.5 124
SUCKER CREEK 8880 13.2 13.5 98 16.5 15.2 109
TIE CREEK 6870 -M -M * -M 12.7 *
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Basin wide percent of average 98 114
BELLE FOURCHE
BLIND PARK 6890 6.0 11.1 54 17.2 12.4 140
NORTH RAPID CREEK 6130 6.3 -M * 14.9 -M *
WARREN PEAK 6520 12.0 11.1 109 11.5 9.5 123
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Basin wide percent of average 81 132
UPPER N. PLATTE RIVER
COLUMBINE 9400 18.4 23.9 77 23.9 26.7 90
DIVIDE PEAK 8800 22.7 21.2 107 27.2 25.7 107
ELK RIVER 8700 17.2 19.4 89 23.9 21.0 114
JOE WRIGHT 10120 21.9 24.4 90 28.5 28.2 102
NORTH FRENCH CREEK 10100 34.3 28.5 121 32.5 26.4 124
OLD BATTLE 10000 33.0 36.4 91 39.4 33.7 118
SOUTH BRUSH CREEK 8400 10.2 12.5 82 21.2 18.9 112
TOWER 10500 48.4 49.7 98 41.2 40.5 102
WEBBER SPRINGS 9200 20.9 28.0 75 29.2 28.5 103
WILLOW CREEK PASS 9540 13.2 13.5 98 13.4 14.4 94
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Basin wide percent of average 94 107
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 16.0 29.0 56 24.5 22.2 111
CASPER MTN. 7900 15.0 18.9 80 19.9 16.9 118
DEADMAN HILL 10220 17.9 18.2 99 19.0 19.4 98
DEER PARK 9700 18.4 -M * 24.5 -M *
LAPRELE CREEK 8320 -M 9.1 * 17.4 13.6 128
RENO HILL 8400 17.4 15.0 116 22.9 21.2 108
ROACH 9700 17.7 18.2 97 22.5 24.0 94
SAND LAKE 10080 40.0 36.2 111 32.2 23.2 139
SOUTH PASS 9040 19.4 17.9 109 21.5 19.4 112
WINDY PEAK 7840 7.3 9.0 82 15.0 11.2 134
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Basin wide percent of average 93 114
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 10.1 9.5 108 19.0 17.4 110
DIVIDE PEAK 8800 22.7 21.2 107 27.2 25.7 107
OLD BATTLE 10000 33.0 36.4 91 39.4 33.7 118
SANDSTONE RS 8150 13.6 14.0 98 22.4 21.4 105
WHISKEY PARK 8950 29.2 30.5 96 32.3 31.7 102
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Basin wide percent of average 98 109
UPPER GREEN RIVER
BIG SANDY OPENING 9100 16.0 15.1 106 16.2 17.9 92
BLIND BULL SUM 8650 30.9 29.0 107 23.4 26.0 90
EAST RIM DIVIDE 7930 14.4 15.0 96 15.0 16.7 90
ELKHART PARK G.S. 9400 14.9 14.9 100 15.7 17.5 90
GROS VENTRE SUMMIT 8775 16.7 15.5 108 16.7 17.4 96
KENDALL R.S. 7740 15.0 12.5 120 17.5 17.0 103
LOOMIS PARK 8240 -M 16.5 * 21.2 20.7 103
NEW FORK LAKE 8340 12.6 10.5 122 13.0 15.9 82
SNIDER BASIN 8250 17.4 15.0 117 18.9 16.7 114
SPRING CREEK DIVIDE 9000 32.2 29.5 109 30.0 29.9 101
TRIPLE PEAK 8500 27.4 26.5 104 32.0 33.8 95
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Basin wide percent of average 108 96
LOWER GREEN RIVER
HAMS FORK 7840 12.0 5.8 207 12.5 14.6 85
HEWINTA 9500 11.2 8.1 139 15.5 15.1 102
HICKERSON PARK 9150 4.5 5.8 78 10.5 11.2 93
HOLE-IN-ROCK 9150 7.1 5.3 134 11.0 11.2 99
INDIAN CREEK 9425 33.2 30.2 110 27.0 28.2 96
KELLEY R.S. 8180 16.4 17.0 97 19.9 20.5 98
STEEL CREEK PARK 10100 15.9 18.2 87 18.0 14.9 122
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Basin wide percent of average 111 99
UPPER BEAR RIVER
BUG LAKE 7950 23.4 19.0 124 21.9 21.5 102
HAYDEN FORK 9400 12.7 9.9 130 22.2 21.5 104
KELLEY R.S. 8180 16.4 17.0 97 19.9 20.5 98
LILY LAKE 9050 11.9 12.0 100 19.0 16.9 114
MONTE CRISTO 8960 27.7 28.7 97 28.2 28.5 99
SALT RIVER SUMMIT 7600 15.6 13.1 120 19.4 18.5 105
TRIAL LAKE 9960 20.7 25.5 81 23.4 26.7 88
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Basin wide percent of average 103 100
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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.