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 23 , 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 14.3 13.3 108 22.6 24.6 92
COTTONWOOD CREEK 7600 20.8 21.7 96 25.3 27.5 92
GRANITE CREEK 6770 15.3 15.4 99 22.1 26.1 85
GRASSY LAKE 7265 32.3 35.9 90 37.6 40.9 92
GROS VENTRE SUMMIT 8775 12.3 15.0 82 14.6 17.6 83
LEWIS LAKE DIVIDE 7860 32.8 35.6 92 34.9 41.6 84
PHILLIPS BENCH 8200 27.5 30.2 91 27.8 32.8 85
SALT RIVER SUMMIT 7600 15.2 12.3 124 19.9 18.7 106
SNAKE RIVER STATION 6920 17.3 17.5 99 24.5 28.7 85
SPRING CREEK DIVIDE 9000 24.7 29.5 84 23.9 30.1 79
THUMB DIVIDE 7980 17.8 16.2 110 19.8 23.0 86
TOGWOTEE PASS 9580 24.8 27.7 90 26.4 31.1 85
TWO OCEAN PLATEAU 9360 32.0 27.1 118 30.0 33.8 89
WILLOW CREEK 8450 27.8 31.8 87 34.5 35.3 98
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Basin wide percent of average 96 88
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 20.8 25.8 81 18.2 20.4 89
BLACK BEAR 7950 40.3 40.0 101 39.5 45.1 88
CANYON 7940 13.3 12.2 109 16.4 15.8 104
FISHER CREEK 9100 -M 38.3 * 30.6 40.8 75
MADISON PLATEAU 7750 22.6 24.7 91 25.5 29.0 88
NORTHEAST ENTRANCE 7350 5.1 7.5 68 12.7 13.4 95
PARKER PEAK 9400 20.5 23.4 88 17.7 17.5 101
SYLVAN LAKE 8420 19.2 23.9 80 22.4 21.5 104
THUMB DIVIDE 7980 17.8 16.2 110 19.8 23.0 86
TWO OCEAN PLATEAU 9360 32.0 27.1 118 30.0 33.8 89
WHISKEY CREEK 6800 16.2 16.7 97 21.2 24.2 88
WHITE MILL 8700 24.5 26.1 94 22.9 31.6 72
WOLVERINE 7650 7.7 10.0 77 10.9 14.6 75
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Basin wide percent of average 95 87
WIND RIVER
BURROUGHS CREEK 8750 17.2 14.1 122 19.2 18.7 103
COLD SPRINGS 9630 12.5 7.8 160 14.6 12.4 118
DEER PARK 9700 -M -M * 24.1 -M *
HOBBS PARK 10100 19.2 17.2 112 17.5 16.5 106
LITTLE WARM 9620 12.9 12.0 108 15.7 15.5 101
SOUTH PASS 9040 18.1 17.9 101 20.8 19.7 106
ST. LAWRENCE ALT 8620 11.7 6.2 189 12.7 11.9 107
TOGWOTEE PASS 9580 24.8 27.7 90 26.4 31.1 85
TOWNSEND CREEK 8700 13.3 10.0 133 16.7 14.7 114
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Basin wide percent of average 115 102
BIGHORN BASIN
BALD MTN. 9375 22.8 23.2 98 20.3 19.9 102
BEAR TRAP MEADOW 7900 7.8 5.6 139 11.5 10.0 115
BLACKWATER 9780 22.5 25.2 89 20.3 19.9 102
BONE SPRINGS DIV 9350 -M 18.2 * 19.5 17.3 113
EVENING STAR 9200 24.5 30.0 82 26.9 25.0 108
GRAVE SPRINGS 8550 13.2 -M * 13.8 11.7 118
KIRWIN 9550 14.0 11.4 123 15.7 12.6 125
MARQUETTE 8760 15.9 8.7 183 16.4 12.4 132
MIDDLE POWDER 7760 13.8 14.2 97 13.4 14.0 96
OWL CREEK 8975 9.3 4.1 227 9.6 7.6 126
POWDER RIVER PASS 9480 14.7 11.1 132 16.0 13.8 116
SHELL CREEK 9580 17.3 16.6 104 13.7 15.2 90
SYLVAN LAKE 8420 19.2 23.9 80 22.4 21.5 104
SYLVAN ROAD 8120 8.9 9.4 95 15.2 18.0 84
TIMBER CREEK 7950 10.0 6.3 159 12.7 9.2 138
YOUNTS PEAK 8350 16.2 18.3 89 16.6 18.6 89
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Basin wide percent of average 104 107
SHOSHONE RIVER
BLACKWATER 9780 22.5 25.2 89 20.3 19.9 102
EVENING STAR 9200 24.5 30.0 82 26.9 25.0 108
KIRWIN 9550 14.0 11.4 123 15.7 12.6 125
MARQUETTE 8760 15.9 8.7 183 16.4 12.4 132
SYLVAN LAKE 8420 19.2 23.9 80 22.4 21.5 104
SYLVAN ROAD 8120 8.9 9.4 95 15.2 18.0 84
YOUNTS PEAK 8350 16.2 18.3 89 16.6 18.6 89
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Basin wide percent of average 96 104
POWDER-TONGUE
BEAR TRAP MEADOW 7900 7.8 5.6 139 11.5 10.0 115
BONE SPRINGS DIV 9350 -M 18.2 * 19.5 17.3 113
BURGESS JUNCTION 7880 13.6 13.2 103 14.9 13.6 110
CLOUD PEAK RESERVOIR 9860 19.3 17.2 112 19.6 16.1 122
DOME LAKE 8880 -M 14.9 * 16.1 15.5 104
GRAVE SPRINGS 8550 13.2 -M * 13.8 11.7 118
HANSEN SAWMILL 8760 10.9 7.2 151 13.6 9.7 140
MIDDLE POWDER 7760 13.8 14.2 97 13.4 14.0 96
POWDER RIVER PASS 9480 14.7 11.1 132 16.0 13.8 116
SUCKER CREEK 8880 14.2 13.6 104 16.6 15.6 106
TIE CREEK 6870 8.8 -M * 16.1 13.1 123
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Basin wide percent of average 115 114
BELLE FOURCHE
BLIND PARK 6890 7.4 10.6 70 14.1 12.8 110
NORTH RAPID CREEK 6130 9.2 -M * 11.7 -M *
WARREN PEAK 6520 12.8 10.6 121 12.5 9.7 129
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Basin wide percent of average 95 118
UPPER N. PLATTE RIVER
COLUMBINE 9400 19.9 23.2 86 25.2 27.1 93
DIVIDE PEAK 8800 21.1 20.6 102 22.7 26.1 87
ELK RIVER 8700 17.6 18.3 96 22.5 21.3 106
JOE WRIGHT 10120 23.8 24.4 98 27.0 28.9 93
NORTH FRENCH CREEK 10100 34.4 28.8 119 32.4 26.8 121
OLD BATTLE 10000 35.8 37.0 97 38.5 34.2 113
SOUTH BRUSH CREEK 8400 6.7 11.8 57 14.3 19.5 73
TOWER 10500 53.1 50.1 106 -M 41.3 *
WEBBER SPRINGS 9200 21.8 27.3 80 28.4 29.2 97
WILLOW CREEK PASS 9540 9.4 13.5 70 9.5 14.7 65
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Basin wide percent of average 96 97
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 25.6 28.9 89 24.5 22.6 108
CASPER MTN. 7900 13.7 18.4 74 15.0 17.5 86
DEADMAN HILL 10220 17.1 18.5 92 16.9 19.9 85
DEER PARK 9700 -M -M * 24.1 -M *
LAPRELE CREEK 8320 8.6 8.2 105 12.8 13.9 92
RENO HILL 8400 13.4 14.5 92 13.8 21.5 64
ROACH 9700 16.9 18.1 93 19.1 24.5 78
SAND LAKE 10080 31.1 36.5 85 27.1 23.6 115
SOUTH PASS 9040 18.1 17.9 101 20.8 19.7 106
WINDY PEAK 7840 7.8 8.6 91 10.8 11.5 94
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Basin wide percent of average 90 92
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 9.5 7.9 120 17.2 17.6 98
DIVIDE PEAK 8800 21.1 20.6 102 22.7 26.1 87
OLD BATTLE 10000 35.8 37.0 97 38.5 34.2 113
SANDSTONE RS 8150 12.9 12.6 102 21.5 21.8 99
WHISKEY PARK 8950 30.9 30.2 102 30.9 32.5 95
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Basin wide percent of average 102 99
UPPER GREEN RIVER
BIG SANDY OPENING 9100 13.7 14.7 93 13.7 18.0 76
BLIND BULL SUM 8650 25.5 26.9 95 20.7 26.3 79
EAST RIM DIVIDE 7930 13.6 14.9 91 13.3 16.8 79
ELKHART PARK G.S. 9400 13.5 14.5 93 15.0 17.7 85
GROS VENTRE SUMMIT 8775 12.3 15.0 82 14.6 17.6 83
KENDALL R.S. 7740 12.9 11.8 109 16.5 17.1 96
LOOMIS PARK 8240 -M 16.0 * 18.9 20.8 91
NEW FORK LAKE 8340 11.2 9.9 113 12.3 16.0 77
SNIDER BASIN 8250 13.7 14.2 96 14.0 16.7 84
SPRING CREEK DIVIDE 9000 24.7 29.5 84 23.9 30.1 79
TRIPLE PEAK 8500 21.3 25.9 82 24.0 34.1 70
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Basin wide percent of average 92 81
LOWER GREEN RIVER
HAMS FORK 7840 8.8 5.7 154 12.8 14.8 86
HEWINTA 9500 13.0 7.2 181 17.1 15.4 111
HICKERSON PARK 9150 13.8 4.8 288 15.0 11.6 129
HOLE-IN-ROCK 9150 8.6 4.2 205 13.0 11.6 112
INDIAN CREEK 9425 26.5 29.6 90 21.6 28.5 76
KELLEY R.S. 8180 15.2 16.3 93 18.1 20.7 87
STEEL CREEK PARK 10100 19.3 18.4 105 21.1 15.2 139
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Basin wide percent of average 122 101
UPPER BEAR RIVER
BUG LAKE 7950 20.7 18.0 115 23.1 21.8 106
HAYDEN FORK 9400 14.8 8.7 170 23.4 22.0 106
KELLEY R.S. 8180 15.2 16.3 93 18.1 20.7 87
LILY LAKE 9050 14.9 10.8 138 20.4 17.1 119
MONTE CRISTO 8960 31.9 27.8 115 29.3 29.1 101
SALT RIVER SUMMIT 7600 15.2 12.3 124 19.9 18.7 106
TRIAL LAKE 9960 25.0 25.0 100 26.1 27.2 96
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Basin wide percent of average 116 102
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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.