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 18 , 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 15.6 15.0 104 22.2 24.2 92
COTTONWOOD CREEK 7600 22.0 22.7 97 25.3 27.1 93
GRANITE CREEK 6770 16.2 16.9 96 22.0 25.6 86
GRASSY LAKE 7265 33.1 37.1 89 37.5 40.3 93
GROS VENTRE SUMMIT 8775 13.0 15.6 83 14.6 17.3 84
LEWIS LAKE DIVIDE 7860 33.3 36.4 91 34.7 40.9 85
PHILLIPS BENCH 8200 27.6 30.6 90 27.7 32.3 86
SALT RIVER SUMMIT 7600 15.9 13.2 120 19.7 18.4 107
SNAKE RIVER STATION 6920 18.1 18.2 99 24.5 28.2 87
SPRING CREEK DIVIDE 9000 23.4 29.4 80 23.8 29.6 80
THUMB DIVIDE 7980 18.0 17.0 106 19.6 22.6 87
TOGWOTEE PASS 9580 25.6 27.2 94 26.3 30.6 86
TWO OCEAN PLATEAU 9360 30.8 26.8 115 29.7 33.3 89
WILLOW CREEK 8450 29.8 31.7 94 34.5 34.8 99
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Basin wide percent of average 95 89
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 20.5 25.6 80 17.8 19.9 89
BLACK BEAR 7950 42.3 40.1 105 38.9 44.2 88
CANYON 7940 13.9 13.0 107 16.3 15.5 105
FISHER CREEK 9100 32.3 38.1 85 30.4 40.0 76
MADISON PLATEAU 7750 23.4 25.3 92 25.4 28.5 89
NORTHEAST ENTRANCE 7350 6.4 8.4 76 12.7 13.0 98
PARKER PEAK 9400 20.4 23.3 88 17.5 17.1 102
SYLVAN LAKE 8420 19.6 23.9 82 22.3 21.0 106
THUMB DIVIDE 7980 18.0 17.0 106 19.6 22.6 87
TWO OCEAN PLATEAU 9360 30.8 26.8 115 29.7 33.3 89
WHISKEY CREEK 6800 16.4 17.6 93 21.1 23.7 89
WHITE MILL 8700 25.0 25.9 97 22.8 30.9 74
WOLVERINE 7650 9.0 11.1 81 10.9 14.2 77
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Basin wide percent of average 94 88
WIND RIVER
BURROUGHS CREEK 8750 17.6 14.9 118 19.2 18.2 105
COLD SPRINGS 9630 12.9 8.3 155 14.4 12.0 120
DEER PARK 9700 -M -M * 23.9 -M *
HOBBS PARK 10100 19.2 16.8 114 17.2 16.0 108
LITTLE WARM 9620 12.7 12.9 98 15.5 15.0 103
SOUTH PASS 9040 18.4 17.7 104 20.6 19.1 108
ST. LAWRENCE ALT 8620 12.1 6.8 178 12.4 11.5 108
TOGWOTEE PASS 9580 25.6 27.2 94 26.3 30.6 86
TOWNSEND CREEK 8700 13.5 10.2 132 16.5 14.2 116
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Basin wide percent of average 115 104
BIGHORN BASIN
BALD MTN. 9375 22.6 22.6 100 19.9 19.3 103
BEAR TRAP MEADOW 7900 8.4 6.4 131 11.0 9.6 115
BLACKWATER 9780 22.0 24.9 88 19.7 19.5 101
BONE SPRINGS DIV 9350 20.2 18.2 111 19.0 16.8 113
EVENING STAR 9200 24.7 29.5 84 26.8 24.5 109
GRAVE SPRINGS 8550 13.2 -M * 13.7 11.2 122
KIRWIN 9550 14.1 11.2 126 15.3 12.2 125
MARQUETTE 8760 16.0 8.7 184 16.0 11.8 136
MIDDLE POWDER 7760 13.7 13.8 99 13.1 13.5 97
OWL CREEK 8975 9.9 4.5 220 9.4 7.3 129
POWDER RIVER PASS 9480 14.7 11.4 129 15.6 13.3 117
SHELL CREEK 9580 16.9 16.4 103 13.4 14.7 91
SYLVAN LAKE 8420 19.6 23.9 82 22.3 21.0 106
SYLVAN ROAD 8120 10.3 10.3 100 15.3 17.6 87
TIMBER CREEK 7950 10.7 6.5 165 12.7 8.7 146
YOUNTS PEAK 8350 16.1 18.3 88 16.4 18.2 90
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Basin wide percent of average 106 109
SHOSHONE RIVER
BLACKWATER 9780 22.0 24.9 88 19.7 19.5 101
EVENING STAR 9200 24.7 29.5 84 26.8 24.5 109
KIRWIN 9550 14.1 11.2 126 15.3 12.2 125
MARQUETTE 8760 16.0 8.7 184 16.0 11.8 136
SYLVAN LAKE 8420 19.6 23.9 82 22.3 21.0 106
SYLVAN ROAD 8120 10.3 10.3 100 15.3 17.6 87
YOUNTS PEAK 8350 16.1 18.3 88 16.4 18.2 90
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Basin wide percent of average 97 106
POWDER-TONGUE
BEAR TRAP MEADOW 7900 8.4 6.4 131 11.0 9.6 115
BONE SPRINGS DIV 9350 20.2 18.2 111 19.0 16.8 113
BURGESS JUNCTION 7880 13.5 13.0 104 14.7 13.1 112
CLOUD PEAK RESERVOIR 9860 18.9 17.0 111 19.0 15.5 123
DOME LAKE 8880 -M 14.8 * 15.9 15.0 106
GRAVE SPRINGS 8550 13.2 -M * 13.7 11.2 122
HANSEN SAWMILL 8760 11.3 7.5 151 -M 9.3 *
MIDDLE POWDER 7760 13.7 13.8 99 13.1 13.5 97
POWDER RIVER PASS 9480 14.7 11.4 129 15.6 13.3 117
SUCKER CREEK 8880 14.6 13.4 109 16.2 15.0 108
TIE CREEK 6870 9.3 -M * 15.9 12.6 126
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Basin wide percent of average 114 114
BELLE FOURCHE
BLIND PARK 6890 8.1 11.2 72 13.8 12.2 113
NORTH RAPID CREEK 6130 9.4 -M * 11.3 -M *
WARREN PEAK 6520 13.0 11.2 116 12.1 9.3 130
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Basin wide percent of average 94 120
UPPER N. PLATTE RIVER
COLUMBINE 9400 19.8 24.0 83 24.5 26.5 92
DIVIDE PEAK 8800 21.4 21.3 100 22.3 25.4 88
ELK RIVER 8700 18.3 19.6 93 21.8 20.8 105
JOE WRIGHT 10120 23.0 24.3 95 25.7 28.0 92
NORTH FRENCH CREEK 10100 34.4 28.4 121 31.7 26.1 121
OLD BATTLE 10000 35.6 36.2 98 37.9 33.3 114
SOUTH BRUSH CREEK 8400 5.7 12.6 45 14.1 18.7 75
TOWER 10500 52.1 49.4 105 41.0 40.2 102
WEBBER SPRINGS 9200 21.8 28.1 78 27.9 28.3 99
WILLOW CREEK PASS 9540 8.9 13.5 66 8.8 14.2 62
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Basin wide percent of average 94 98
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 25.2 29.0 87 23.9 21.9 109
CASPER MTN. 7900 13.7 18.8 73 14.7 16.7 88
DEADMAN HILL 10220 16.5 18.0 92 16.2 19.2 84
DEER PARK 9700 -M -M * 23.9 -M *
LAPRELE CREEK 8320 9.3 9.3 100 12.6 13.4 94
RENO HILL 8400 14.0 15.1 93 13.6 21.0 65
ROACH 9700 16.4 18.1 91 18.7 23.8 79
SAND LAKE 10080 30.8 36.0 86 26.8 22.9 117
SOUTH PASS 9040 18.4 17.7 104 20.6 19.1 108
WINDY PEAK 7840 8.0 9.0 89 10.8 11.0 98
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Basin wide percent of average 89 93
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 11.2 9.8 114 16.9 17.1 99
DIVIDE PEAK 8800 21.4 21.3 100 22.3 25.4 88
OLD BATTLE 10000 35.6 36.2 98 37.9 33.3 114
SANDSTONE RS 8150 14.7 14.3 103 21.2 21.1 100
WHISKEY PARK 8950 31.0 30.5 102 30.4 31.5 97
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Basin wide percent of average 102 100
UPPER GREEN RIVER
BIG SANDY OPENING 9100 14.2 15.1 94 13.5 17.7 76
BLIND BULL SUM 8650 25.8 29.4 88 20.7 25.9 80
EAST RIM DIVIDE 7930 13.7 15.0 91 13.3 16.5 81
ELKHART PARK G.S. 9400 14.1 14.8 95 14.9 17.4 86
GROS VENTRE SUMMIT 8775 13.0 15.6 83 14.6 17.3 84
KENDALL R.S. 7740 14.3 12.6 113 16.3 16.9 96
LOOMIS PARK 8240 -M 16.6 * 18.9 20.5 92
NEW FORK LAKE 8340 12.2 10.4 117 11.7 15.7 75
SNIDER BASIN 8250 13.5 15.0 90 13.6 16.5 82
SPRING CREEK DIVIDE 9000 23.4 29.4 80 23.8 29.6 80
TRIPLE PEAK 8500 22.0 26.5 83 23.7 33.6 71
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Basin wide percent of average 90 81
LOWER GREEN RIVER
HAMS FORK 7840 10.8 5.7 189 12.7 14.6 87
HEWINTA 9500 15.5 8.3 187 16.8 14.9 113
HICKERSON PARK 9150 15.2 5.9 258 14.7 11.1 132
HOLE-IN-ROCK 9150 11.9 5.5 216 12.9 11.1 116
INDIAN CREEK 9425 26.4 30.1 88 21.3 28.1 76
KELLEY R.S. 8180 16.3 17.1 95 17.8 20.4 87
STEEL CREEK PARK 10100 19.3 18.1 107 20.5 14.7 139
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Basin wide percent of average 127 102
UPPER BEAR RIVER
BUG LAKE 7950 22.2 19.2 116 22.9 21.3 108
HAYDEN FORK 9400 15.4 10.0 154 23.2 21.3 109
KELLEY R.S. 8180 16.3 17.1 95 17.8 20.4 87
LILY LAKE 9050 16.4 12.1 136 20.2 16.6 122
MONTE CRISTO 8960 32.6 28.7 114 29.1 28.3 103
SALT RIVER SUMMIT 7600 15.9 13.2 120 19.7 18.4 107
TRIAL LAKE 9960 25.0 25.6 98 26.1 26.4 99
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Basin wide percent of average 114 104
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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.