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 11 , 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 15.1 16.5 92 20.9 23.6 89
COTTONWOOD CREEK 7600 21.3 23.6 90 24.4 26.5 92
GRANITE CREEK 6770 16.3 18.1 90 21.2 24.9 85
GRASSY LAKE 7265 32.0 37.4 86 35.4 39.4 90
GROS VENTRE SUMMIT 8775 12.1 15.9 76 13.4 16.9 79
LEWIS LAKE DIVIDE 7860 31.6 36.5 87 33.1 40.0 83
PHILLIPS BENCH 8200 27.2 30.5 89 27.1 31.6 86
SALT RIVER SUMMIT 7600 15.6 14.0 111 19.1 17.9 107
SNAKE RIVER STATION 6920 17.1 18.7 91 22.5 27.6 82
SPRING CREEK DIVIDE 9000 22.0 29.1 76 22.7 29.0 78
THUMB DIVIDE 7980 16.6 17.3 96 18.0 22.1 81
TOGWOTEE PASS 9580 25.8 26.5 97 24.8 30.0 83
TWO OCEAN PLATEAU 9360 28.9 26.7 108 28.2 32.5 87
WILLOW CREEK 8450 28.8 31.4 92 32.8 34.0 96
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Basin wide percent of average 91 87
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 20.1 25.0 80 17.3 19.2 90
BLACK BEAR 7950 40.6 39.7 102 37.4 43.0 87
CANYON 7940 12.7 13.4 95 15.1 15.0 101
FISHER CREEK 9100 31.3 37.4 84 28.8 38.8 74
MADISON PLATEAU 7750 21.6 25.4 85 23.6 27.8 85
NORTHEAST ENTRANCE 7350 6.2 9.1 68 12.2 12.6 97
PARKER PEAK 9400 19.8 22.8 87 17.2 16.5 104
SYLVAN LAKE 8420 18.5 23.4 79 21.1 20.3 104
THUMB DIVIDE 7980 16.6 17.3 96 18.0 22.1 81
TWO OCEAN PLATEAU 9360 28.9 26.7 108 28.2 32.5 87
WHISKEY CREEK 6800 14.8 18.0 82 19.2 23.1 83
WHITE MILL 8700 24.0 25.6 94 22.0 30.0 73
WOLVERINE 7650 9.6 11.8 81 10.6 13.6 78
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Basin wide percent of average 90 86
WIND RIVER
BURROUGHS CREEK 8750 15.6 15.2 103 17.0 17.6 97
COLD SPRINGS 9630 11.1 8.6 129 12.7 11.4 111
DEER PARK 9700 -M -M * 22.0 -M *
HOBBS PARK 10100 16.8 16.1 104 15.1 15.2 99
LITTLE WARM 9620 11.7 13.0 90 14.0 14.3 98
SOUTH PASS 9040 16.5 17.3 95 18.6 18.3 102
ST. LAWRENCE ALT 8620 10.7 7.2 149 11.0 11.0 100
TOGWOTEE PASS 9580 25.8 26.5 97 24.8 30.0 83
TOWNSEND CREEK 8700 12.2 10.3 118 14.9 13.5 110
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Basin wide percent of average 105 98
BIGHORN BASIN
BALD MTN. 9375 20.7 21.8 95 18.1 18.5 98
BEAR TRAP MEADOW 7900 7.4 7.0 106 9.3 9.0 103
BLACKWATER 9780 21.1 24.0 88 18.8 18.9 99
BONE SPRINGS DIV 9350 18.2 17.6 103 17.2 16.1 107
EVENING STAR 9200 23.8 28.6 83 25.5 23.8 107
GRAVE SPRINGS 8550 11.5 -M * 12.0 10.5 114
KIRWIN 9550 13.4 10.8 124 14.5 11.6 125
MARQUETTE 8760 13.8 8.5 162 14.0 10.8 130
MIDDLE POWDER 7760 12.2 13.2 92 11.7 12.8 91
OWL CREEK 8975 8.3 4.7 177 7.7 6.8 113
POWDER RIVER PASS 9480 13.3 11.4 117 14.4 12.6 114
SHELL CREEK 9580 15.7 15.9 99 12.1 14.0 86
SYLVAN LAKE 8420 18.5 23.4 79 21.1 20.3 104
SYLVAN ROAD 8120 10.3 11.3 91 14.8 17.0 87
TIMBER CREEK 7950 9.0 6.5 138 10.9 8.0 136
YOUNTS PEAK 8350 15.2 18.0 84 15.4 17.6 88
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Basin wide percent of average 99 104
SHOSHONE RIVER
BLACKWATER 9780 21.1 24.0 88 18.8 18.9 99
EVENING STAR 9200 23.8 28.6 83 25.5 23.8 107
KIRWIN 9550 13.4 10.8 124 14.5 11.6 125
MARQUETTE 8760 13.8 8.5 162 14.0 10.8 130
SYLVAN LAKE 8420 18.5 23.4 79 21.1 20.3 104
SYLVAN ROAD 8120 10.3 11.3 91 14.8 17.0 87
YOUNTS PEAK 8350 15.2 18.0 84 15.4 17.6 88
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Basin wide percent of average 93 103
POWDER-TONGUE
BEAR TRAP MEADOW 7900 7.4 7.0 106 9.3 9.0 103
BONE SPRINGS DIV 9350 18.2 17.6 103 17.2 16.1 107
BURGESS JUNCTION 7880 12.0 12.6 95 13.2 12.5 106
CLOUD PEAK RESERVOIR 9860 15.6 16.3 96 15.9 14.6 109
DOME LAKE 8880 10.8 14.5 74 14.3 14.3 100
GRAVE SPRINGS 8550 11.5 -M * 12.0 10.5 114
HANSEN SAWMILL 8760 8.9 7.5 119 10.6 8.7 122
MIDDLE POWDER 7760 12.2 13.2 92 11.7 12.8 91
POWDER RIVER PASS 9480 13.3 11.4 117 14.4 12.6 114
SUCKER CREEK 8880 12.8 13.0 98 14.7 14.2 104
TIE CREEK 6870 7.8 -M * 13.7 11.9 115
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Basin wide percent of average 98 107
BELLE FOURCHE
BLIND PARK 6890 8.5 11.5 74 13.6 11.3 120
NORTH RAPID CREEK 6130 9.8 -M * 10.9 -M *
WARREN PEAK 6520 12.4 11.5 108 11.3 8.8 128
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Basin wide percent of average 91 124
UPPER N. PLATTE RIVER
COLUMBINE 9400 20.0 24.5 82 22.8 25.7 89
DIVIDE PEAK 8800 20.5 21.7 94 21.2 24.3 87
ELK RIVER 8700 17.3 20.3 85 19.6 20.2 97
JOE WRIGHT 10120 21.2 23.6 90 24.2 26.8 90
NORTH FRENCH CREEK 10100 32.3 27.5 117 29.7 25.0 119
OLD BATTLE 10000 33.2 34.8 95 35.9 32.0 112
SOUTH BRUSH CREEK 8400 8.0 13.1 61 13.2 17.7 75
TOWER 10500 47.5 48.0 99 37.5 38.5 97
WEBBER SPRINGS 9200 20.1 28.5 71 26.0 27.0 96
WILLOW CREEK PASS 9540 7.6 13.1 58 7.7 13.5 57
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Basin wide percent of average 89 95
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 22.6 28.3 80 22.0 20.9 105
CASPER MTN. 7900 13.1 18.3 72 13.4 15.6 86
DEADMAN HILL 10220 15.3 17.5 87 14.9 18.2 82
DEER PARK 9700 -M -M * 22.0 -M *
LAPRELE CREEK 8320 9.6 10.2 94 12.0 12.8 94
RENO HILL 8400 13.3 15.2 88 12.7 20.3 63
ROACH 9700 15.6 17.9 87 17.3 22.7 76
SAND LAKE 10080 28.5 35.0 81 24.9 21.8 114
SOUTH PASS 9040 16.5 17.3 95 18.6 18.3 102
WINDY PEAK 7840 7.8 9.2 85 9.9 10.4 95
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Basin wide percent of average 84 90
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 11.7 11.0 106 16.2 16.4 99
DIVIDE PEAK 8800 20.5 21.7 94 21.2 24.3 87
OLD BATTLE 10000 33.2 34.8 95 35.9 32.0 112
SANDSTONE RS 8150 15.1 15.2 99 20.0 20.1 100
WHISKEY PARK 8950 29.7 30.2 98 28.7 30.1 95
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Basin wide percent of average 98 99
UPPER GREEN RIVER
BIG SANDY OPENING 9100 13.1 15.2 86 12.3 17.2 72
BLIND BULL SUM 8650 25.3 30.7 82 20.1 25.4 79
EAST RIM DIVIDE 7930 13.1 14.7 89 13.0 16.1 81
ELKHART PARK G.S. 9400 13.6 14.7 93 14.0 16.9 83
GROS VENTRE SUMMIT 8775 12.1 15.9 76 13.4 16.9 79
KENDALL R.S. 7740 14.5 13.6 107 15.8 16.5 96
LOOMIS PARK 8240 11.6 17.1 68 18.0 20.0 90
NEW FORK LAKE 8340 11.7 10.9 107 11.4 15.3 75
SNIDER BASIN 8250 12.8 15.3 84 13.2 16.1 82
SPRING CREEK DIVIDE 9000 22.0 29.1 76 22.7 29.0 78
TRIPLE PEAK 8500 21.9 26.6 82 23.1 32.8 70
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Basin wide percent of average 84 80
LOWER GREEN RIVER
HAMS FORK 7840 10.8 7.6 142 12.1 14.2 85
HEWINTA 9500 13.8 9.7 142 16.1 14.2 113
HICKERSON PARK 9150 13.7 6.7 204 13.9 10.4 134
HOLE-IN-ROCK 9150 10.9 6.3 173 12.1 10.4 116
INDIAN CREEK 9425 25.8 30.0 86 20.7 27.5 75
KELLEY R.S. 8180 16.0 17.5 91 17.1 19.9 86
STEEL CREEK PARK 10100 18.0 17.5 103 19.7 13.9 142
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Basin wide percent of average 114 101
UPPER BEAR RIVER
BUG LAKE 7950 20.9 20.4 102 21.9 20.6 106
HAYDEN FORK 9400 14.6 12.4 118 21.6 20.4 106
KELLEY R.S. 8180 16.0 17.5 91 17.1 19.9 86
LILY LAKE 9050 14.9 13.0 115 18.7 15.9 118
MONTE CRISTO 8960 31.0 29.5 105 27.9 27.2 103
SALT RIVER SUMMIT 7600 15.6 14.0 111 19.1 17.9 107
TRIAL LAKE 9960 23.0 25.7 89 24.3 25.4 96
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Basin wide percent of average 103 102
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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.