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 13 , 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 14.9 16.3 91 21.1 23.8 89
COTTONWOOD CREEK 7600 21.5 23.5 91 24.8 26.7 93
GRANITE CREEK 6770 16.1 17.9 90 21.2 25.1 84
GRASSY LAKE 7265 32.1 37.6 85 36.1 39.6 91
GROS VENTRE SUMMIT 8775 12.4 16.0 78 13.6 17.0 80
LEWIS LAKE DIVIDE 7860 32.0 36.6 87 33.4 40.3 83
PHILLIPS BENCH 8200 27.5 30.7 90 27.3 31.8 86
SALT RIVER SUMMIT 7600 15.7 13.9 113 19.3 18.1 107
SNAKE RIVER STATION 6920 17.0 18.6 91 22.8 27.8 82
SPRING CREEK DIVIDE 9000 22.8 29.2 78 23.3 29.2 80
THUMB DIVIDE 7980 16.7 17.4 96 18.4 22.2 83
TOGWOTEE PASS 9580 26.6 26.7 100 24.9 30.2 82
TWO OCEAN PLATEAU 9360 29.3 26.6 110 28.4 32.7 87
WILLOW CREEK 8450 29.1 31.5 92 33.8 34.2 99
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Basin wide percent of average 92 87
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 20.2 25.3 80 17.5 19.4 90
BLACK BEAR 7950 40.9 40.0 102 38.3 43.4 88
CANYON 7940 12.9 13.4 96 15.3 15.2 101
FISHER CREEK 9100 31.9 37.6 85 29.2 39.1 75
MADISON PLATEAU 7750 22.4 25.5 88 24.4 28.0 87
NORTHEAST ENTRANCE 7350 6.2 9.0 69 12.4 12.7 98
PARKER PEAK 9400 20.0 23.0 87 17.3 16.7 104
SYLVAN LAKE 8420 18.8 23.7 79 21.6 20.5 105
THUMB DIVIDE 7980 16.7 17.4 96 18.4 22.2 83
TWO OCEAN PLATEAU 9360 29.3 26.6 110 28.4 32.7 87
WHISKEY CREEK 6800 15.5 18.1 86 20.0 23.3 86
WHITE MILL 8700 24.4 25.7 95 22.4 30.3 74
WOLVERINE 7650 9.0 11.8 76 10.6 13.8 77
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Basin wide percent of average 90 87
WIND RIVER
BURROUGHS CREEK 8750 15.8 15.3 103 17.1 17.8 96
COLD SPRINGS 9630 11.3 8.7 130 12.7 11.6 109
DEER PARK 9700 -M -M * 22.3 -M *
HOBBS PARK 10100 17.1 16.3 105 15.2 15.4 99
LITTLE WARM 9620 11.5 13.2 87 14.2 14.5 98
SOUTH PASS 9040 16.5 17.4 95 18.9 18.5 102
ST. LAWRENCE ALT 8620 10.7 7.2 149 11.1 11.1 100
TOGWOTEE PASS 9580 26.6 26.7 100 24.9 30.2 82
TOWNSEND CREEK 8700 12.1 10.3 117 14.8 13.7 108
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Basin wide percent of average 106 97
BIGHORN BASIN
BALD MTN. 9375 20.9 22.0 95 18.2 18.8 97
BEAR TRAP MEADOW 7900 7.0 6.9 101 9.3 9.2 101
BLACKWATER 9780 21.1 24.4 86 18.8 19.1 98
BONE SPRINGS DIV 9350 18.5 17.9 103 17.5 16.3 107
EVENING STAR 9200 23.8 28.9 82 25.7 24.0 107
GRAVE SPRINGS 8550 11.8 -M * 12.4 10.7 116
KIRWIN 9550 13.4 10.9 123 14.6 11.8 124
MARQUETTE 8760 13.7 8.6 159 13.9 11.1 125
MIDDLE POWDER 7760 12.4 13.4 93 12.0 13.0 92
OWL CREEK 8975 8.1 4.7 172 7.6 7.0 109
POWDER RIVER PASS 9480 13.6 11.5 118 14.7 12.8 115
SHELL CREEK 9580 16.0 16.0 100 12.4 14.2 87
SYLVAN LAKE 8420 18.8 23.7 79 21.6 20.5 105
SYLVAN ROAD 8120 10.3 11.0 94 15.1 17.2 88
TIMBER CREEK 7950 9.0 6.6 136 10.9 8.2 133
YOUNTS PEAK 8350 15.2 18.2 84 15.5 17.7 88
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Basin wide percent of average 99 104
SHOSHONE RIVER
BLACKWATER 9780 21.1 24.4 86 18.8 19.1 98
EVENING STAR 9200 23.8 28.9 82 25.7 24.0 107
KIRWIN 9550 13.4 10.9 123 14.6 11.8 124
MARQUETTE 8760 13.7 8.6 159 13.9 11.1 125
SYLVAN LAKE 8420 18.8 23.7 79 21.6 20.5 105
SYLVAN ROAD 8120 10.3 11.0 94 15.1 17.2 88
YOUNTS PEAK 8350 15.2 18.2 84 15.5 17.7 88
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Basin wide percent of average 93 103
POWDER-TONGUE
BEAR TRAP MEADOW 7900 7.0 6.9 101 9.3 9.2 101
BONE SPRINGS DIV 9350 18.5 17.9 103 17.5 16.3 107
BURGESS JUNCTION 7880 12.1 12.7 95 13.3 12.7 105
CLOUD PEAK RESERVOIR 9860 15.7 16.5 95 16.0 14.8 108
DOME LAKE 8880 11.2 14.7 76 14.6 14.5 101
GRAVE SPRINGS 8550 11.8 -M * 12.4 10.7 116
HANSEN SAWMILL 8760 8.7 7.5 116 10.7 8.9 120
MIDDLE POWDER 7760 12.4 13.4 93 12.0 13.0 92
POWDER RIVER PASS 9480 13.6 11.5 118 14.7 12.8 115
SUCKER CREEK 8880 12.8 13.1 98 14.9 14.5 103
TIE CREEK 6870 7.4 -M * 13.8 12.1 114
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Basin wide percent of average 98 107
BELLE FOURCHE
BLIND PARK 6890 8.0 11.5 70 13.6 11.5 118
NORTH RAPID CREEK 6130 9.2 -M * 11.0 -M *
WARREN PEAK 6520 12.0 11.5 104 11.3 8.9 127
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Basin wide percent of average 87 122
UPPER N. PLATTE RIVER
COLUMBINE 9400 18.3 24.5 75 23.3 25.9 90
DIVIDE PEAK 8800 20.6 21.7 95 21.5 24.6 87
ELK RIVER 8700 17.3 20.3 85 20.2 20.4 99
JOE WRIGHT 10120 22.2 23.9 93 24.9 27.1 92
NORTH FRENCH CREEK 10100 33.1 27.8 119 30.6 25.3 121
OLD BATTLE 10000 33.9 35.3 96 36.7 32.4 113
SOUTH BRUSH CREEK 8400 8.3 13.1 63 13.5 18.0 75
TOWER 10500 49.2 48.5 101 40.9 39.0 105
WEBBER SPRINGS 9200 20.6 28.6 72 26.5 27.4 97
WILLOW CREEK PASS 9540 7.9 13.3 59 7.9 13.7 58
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Basin wide percent of average 90 97
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 23.1 28.6 81 22.4 21.2 106
CASPER MTN. 7900 12.7 18.7 68 13.5 15.9 85
DEADMAN HILL 10220 15.7 17.6 89 15.1 18.5 82
DEER PARK 9700 -M -M * 22.3 -M *
LAPRELE CREEK 8320 9.0 10.1 89 12.0 13.0 92
RENO HILL 8400 12.9 15.3 84 12.7 20.5 62
ROACH 9700 15.4 18.0 86 17.7 23.0 77
SAND LAKE 10080 28.9 35.3 82 25.3 22.1 114
SOUTH PASS 9040 16.5 17.4 95 18.9 18.5 102
WINDY PEAK 7840 7.4 9.2 80 9.7 10.6 92
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Basin wide percent of average 83 90
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 11.0 11.0 100 16.4 16.6 99
DIVIDE PEAK 8800 20.6 21.7 95 21.5 24.6 87
OLD BATTLE 10000 33.9 35.3 96 36.7 32.4 113
SANDSTONE RS 8150 14.7 15.3 96 20.6 20.4 101
WHISKEY PARK 8950 29.7 30.5 97 29.5 30.5 97
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Basin wide percent of average 97 100
UPPER GREEN RIVER
BIG SANDY OPENING 9100 13.2 15.3 86 12.6 17.4 72
BLIND BULL SUM 8650 25.3 30.8 82 20.3 25.5 80
EAST RIM DIVIDE 7930 13.2 14.9 89 13.0 16.2 80
ELKHART PARK G.S. 9400 13.5 14.8 91 14.1 17.1 82
GROS VENTRE SUMMIT 8775 12.4 16.0 78 13.6 17.0 80
KENDALL R.S. 7740 14.1 13.3 106 15.7 16.6 95
LOOMIS PARK 8240 13.1 17.0 77 18.1 20.1 90
NEW FORK LAKE 8340 11.4 10.8 106 11.2 15.4 73
SNIDER BASIN 8250 13.3 15.4 86 13.5 16.2 83
SPRING CREEK DIVIDE 9000 22.8 29.2 78 23.3 29.2 80
TRIPLE PEAK 8500 21.9 26.8 82 23.2 33.0 70
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Basin wide percent of average 85 80
LOWER GREEN RIVER
HAMS FORK 7840 10.4 6.6 158 12.3 14.3 86
HEWINTA 9500 13.6 9.4 145 16.2 14.4 112
HICKERSON PARK 9150 13.9 6.6 211 14.0 10.6 132
HOLE-IN-ROCK 9150 10.5 6.2 169 12.3 10.6 116
INDIAN CREEK 9425 26.1 30.2 86 20.9 27.6 76
KELLEY R.S. 8180 16.0 17.6 91 17.5 20.0 88
STEEL CREEK PARK 10100 18.3 17.7 103 20.0 14.1 142
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Basin wide percent of average 115 101
UPPER BEAR RIVER
BUG LAKE 7950 21.2 20.2 105 22.1 20.8 106
HAYDEN FORK 9400 14.1 11.6 122 21.8 20.7 105
KELLEY R.S. 8180 16.0 17.6 91 17.5 20.0 88
LILY LAKE 9050 15.2 13.0 117 18.9 16.1 117
MONTE CRISTO 8960 31.9 29.4 109 28.3 27.5 103
SALT RIVER SUMMIT 7600 15.7 13.9 113 19.3 18.1 107
TRIAL LAKE 9960 23.4 25.9 90 24.8 25.7 96
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Basin wide percent of average 104 103
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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.