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 21 , 1998
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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 15.3 14.0 109 22.5 24.4 92
COTTONWOOD CREEK 7600 21.7 22.1 98 25.3 27.4 92
GRANITE CREEK 6770 15.8 16.0 99 22.1 25.9 85
GRASSY LAKE 7265 32.6 36.3 90 37.6 40.6 93
GROS VENTRE SUMMIT 8775 12.9 15.2 85 14.6 17.5 83
LEWIS LAKE DIVIDE 7860 33.1 35.9 92 34.9 41.3 85
PHILLIPS BENCH 8200 27.5 30.4 90 27.8 32.6 85
SALT RIVER SUMMIT 7600 15.8 12.7 124 19.8 18.6 106
SNAKE RIVER STATION 6920 17.5 17.8 98 24.5 28.5 86
SPRING CREEK DIVIDE 9000 23.8 29.5 81 23.8 29.9 80
THUMB DIVIDE 7980 17.9 16.5 108 19.7 22.8 86
TOGWOTEE PASS 9580 25.3 27.5 92 26.4 30.9 85
TWO OCEAN PLATEAU 9360 30.9 27.0 114 30.0 33.6 89
WILLOW CREEK 8450 30.0 31.8 94 34.5 35.1 98
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Basin wide percent of average 96 89
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 20.7 25.7 81 18.1 20.2 90
BLACK BEAR 7950 41.5 40.1 103 39.5 44.8 88
CANYON 7940 13.7 12.5 110 16.4 15.7 104
FISHER CREEK 9100 32.4 38.2 85 30.5 40.5 75
MADISON PLATEAU 7750 23.2 24.9 93 25.5 28.8 89
NORTHEAST ENTRANCE 7350 6.2 7.8 79 12.7 13.2 96
PARKER PEAK 9400 20.8 23.4 89 17.7 17.4 102
SYLVAN LAKE 8420 19.7 23.9 82 22.4 21.3 105
THUMB DIVIDE 7980 17.9 16.5 108 19.7 22.8 86
TWO OCEAN PLATEAU 9360 30.9 27.0 114 30.0 33.6 89
WHISKEY CREEK 6800 16.4 17.1 96 21.1 24.0 88
WHITE MILL 8700 25.0 26.0 96 22.9 31.3 73
WOLVERINE 7650 8.8 10.4 85 10.9 14.4 76
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Basin wide percent of average 94 88
WIND RIVER
BURROUGHS CREEK 8750 17.6 14.4 122 19.2 18.5 104
COLD SPRINGS 9630 12.7 8.0 159 14.5 12.3 118
DEER PARK 9700 -M -M * 24.1 -M *
HOBBS PARK 10100 19.5 17.1 114 17.4 16.3 107
LITTLE WARM 9620 12.9 12.3 105 15.6 15.3 102
SOUTH PASS 9040 18.5 17.8 104 20.7 19.4 107
ST. LAWRENCE ALT 8620 12.1 6.5 186 12.5 11.7 107
TOGWOTEE PASS 9580 25.3 27.5 92 26.4 30.9 85
TOWNSEND CREEK 8700 13.4 10.1 133 16.6 14.5 114
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Basin wide percent of average 116 103
BIGHORN BASIN
BALD MTN. 9375 22.9 23.0 100 20.0 19.7 102
BEAR TRAP MEADOW 7900 8.5 5.9 144 11.3 9.8 115
BLACKWATER 9780 22.5 25.1 90 20.1 19.8 102
BONE SPRINGS DIV 9350 20.6 18.2 113 19.3 17.1 113
EVENING STAR 9200 24.7 29.8 83 26.9 24.8 108
GRAVE SPRINGS 8550 13.3 -M * 13.8 11.5 120
KIRWIN 9550 14.3 11.3 127 15.7 12.5 126
MARQUETTE 8760 16.1 8.7 185 16.1 12.2 132
MIDDLE POWDER 7760 13.9 14.1 99 13.3 13.8 96
OWL CREEK 8975 9.9 4.2 236 9.6 7.5 128
POWDER RIVER PASS 9480 15.0 11.2 134 15.9 13.6 117
SHELL CREEK 9580 17.4 16.5 105 13.7 15.0 91
SYLVAN LAKE 8420 19.7 23.9 82 22.4 21.3 105
SYLVAN ROAD 8120 9.9 9.7 102 15.2 17.8 85
TIMBER CREEK 7950 10.7 6.4 167 12.7 9.0 141
YOUNTS PEAK 8350 16.2 18.3 89 16.6 18.4 90
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Basin wide percent of average 107 108
SHOSHONE RIVER
BLACKWATER 9780 22.5 25.1 90 20.1 19.8 102
EVENING STAR 9200 24.7 29.8 83 26.9 24.8 108
KIRWIN 9550 14.3 11.3 127 15.7 12.5 126
MARQUETTE 8760 16.1 8.7 185 16.1 12.2 132
SYLVAN LAKE 8420 19.7 23.9 82 22.4 21.3 105
SYLVAN ROAD 8120 9.9 9.7 102 15.2 17.8 85
YOUNTS PEAK 8350 16.2 18.3 89 16.6 18.4 90
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Basin wide percent of average 97 105
POWDER-TONGUE
BEAR TRAP MEADOW 7900 8.5 5.9 144 11.3 9.8 115
BONE SPRINGS DIV 9350 20.6 18.2 113 19.3 17.1 113
BURGESS JUNCTION 7880 13.7 13.1 105 14.8 13.4 110
CLOUD PEAK RESERVOIR 9860 19.3 17.1 113 19.4 15.8 123
DOME LAKE 8880 -M 14.9 * 16.1 15.3 105
GRAVE SPRINGS 8550 13.3 -M * 13.8 11.5 120
HANSEN SAWMILL 8760 11.4 7.3 156 13.5 9.5 142
MIDDLE POWDER 7760 13.9 14.1 99 13.3 13.8 96
POWDER RIVER PASS 9480 15.0 11.2 134 15.9 13.6 117
SUCKER CREEK 8880 14.7 13.5 109 16.5 15.4 107
TIE CREEK 6870 -M -M * -M 12.9 *
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Basin wide percent of average 117 114
BELLE FOURCHE
BLIND PARK 6890 8.3 10.8 77 14.1 12.5 113
NORTH RAPID CREEK 6130 9.7 -M * 11.6 -M *
WARREN PEAK 6520 13.3 10.8 123 12.4 9.5 131
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Basin wide percent of average 100 120
UPPER N. PLATTE RIVER
COLUMBINE 9400 20.4 23.5 87 25.0 26.9 93
DIVIDE PEAK 8800 21.6 20.9 103 22.5 25.8 87
ELK RIVER 8700 18.8 18.8 100 22.4 21.1 106
JOE WRIGHT 10120 24.0 24.4 98 26.9 28.5 94
NORTH FRENCH CREEK 10100 34.0 28.7 118 32.3 26.5 122
OLD BATTLE 10000 35.9 36.7 98 38.3 33.9 113
SOUTH BRUSH CREEK 8400 6.3 12.1 52 14.3 19.2 74
TOWER 10500 53.2 49.8 107 40.9 40.9 100
WEBBER SPRINGS 9200 21.8 27.6 79 28.2 28.8 98
WILLOW CREEK PASS 9540 9.6 13.5 71 9.4 14.5 65
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Basin wide percent of average 96 98
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 25.5 29.0 88 24.4 22.3 109
CASPER MTN. 7900 13.7 18.6 74 14.8 17.2 86
DEADMAN HILL 10220 17.1 18.3 93 16.9 19.6 86
DEER PARK 9700 -M -M * 24.1 -M *
LAPRELE CREEK 8320 9.1 8.6 106 12.6 13.7 92
RENO HILL 8400 14.1 14.7 96 13.8 21.3 65
ROACH 9700 16.9 18.1 93 19.1 24.2 79
SAND LAKE 10080 31.2 36.3 86 27.1 23.3 116
SOUTH PASS 9040 18.5 17.8 104 20.7 19.4 107
WINDY PEAK 7840 7.8 8.8 89 11.0 11.3 97
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Basin wide percent of average 90 93
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 11.1 8.6 129 17.1 17.4 98
DIVIDE PEAK 8800 21.6 20.9 103 22.5 25.8 87
OLD BATTLE 10000 35.9 36.7 98 38.3 33.9 113
SANDSTONE RS 8150 14.7 13.2 111 21.5 21.5 100
WHISKEY PARK 8950 31.4 30.3 104 30.9 32.1 96
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Basin wide percent of average 105 100
UPPER GREEN RIVER
BIG SANDY OPENING 9100 14.3 14.8 97 13.6 17.9 76
BLIND BULL SUM 8650 26.2 27.9 94 20.7 26.1 79
EAST RIM DIVIDE 7930 13.8 14.9 93 13.4 16.7 80
ELKHART PARK G.S. 9400 14.1 14.6 97 15.0 17.6 85
GROS VENTRE SUMMIT 8775 12.9 15.2 85 14.6 17.5 83
KENDALL R.S. 7740 14.0 12.2 115 16.5 17.0 97
LOOMIS PARK 8240 -M 16.2 * 18.9 20.7 91
NEW FORK LAKE 8340 12.2 10.1 121 12.1 15.9 76
SNIDER BASIN 8250 13.5 14.6 92 13.9 16.6 84
SPRING CREEK DIVIDE 9000 23.8 29.5 81 23.8 29.9 80
TRIPLE PEAK 8500 21.7 26.2 83 23.9 33.9 71
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Basin wide percent of average 93 81
LOWER GREEN RIVER
HAMS FORK 7840 10.4 5.7 182 12.8 14.7 87
HEWINTA 9500 16.2 7.6 213 17.0 15.2 112
HICKERSON PARK 9150 15.4 5.2 296 14.8 11.4 130
HOLE-IN-ROCK 9150 11.0 4.7 234 12.9 11.4 113
INDIAN CREEK 9425 27.0 29.8 91 21.5 28.3 76
KELLEY R.S. 8180 16.1 16.6 97 18.0 20.6 87
STEEL CREEK PARK 10100 19.6 18.3 107 21.0 15.0 140
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Basin wide percent of average 132 101
UPPER BEAR RIVER
BUG LAKE 7950 21.8 18.5 118 23.0 21.6 106
HAYDEN FORK 9400 16.0 9.2 174 23.3 21.7 107
KELLEY R.S. 8180 16.1 16.6 97 18.0 20.6 87
LILY LAKE 9050 15.7 11.3 139 20.4 16.9 121
MONTE CRISTO 8960 33.0 28.1 117 29.2 28.8 101
SALT RIVER SUMMIT 7600 15.8 12.7 124 19.8 18.6 106
TRIAL LAKE 9960 25.3 25.2 100 26.1 26.9 97
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Basin wide percent of average 118 103
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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.