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: MAY 16 , 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 2.7 4.5 60 24.0 26.5 91
COTTONWOOD CREEK 7600 10.4 13.2 79 28.4 29.6 96
GRANITE CREEK 6770 5.4 7.0 77 23.7 28.3 84
GRASSY LAKE 7265 20.4 26.3 78 40.0 44.0 91
GROS VENTRE SUMMIT 8775 8.4 9.5 88 16.2 19.1 85
LEWIS LAKE DIVIDE 7860 22.0 29.0 76 36.6 44.8 82
PHILLIPS BENCH 8200 23.3 24.8 94 30.7 35.3 87
SALT RIVER SUMMIT 7600 4.2 .0 * 22.7 20.3 112
SNAKE RIVER STATION 6920 1.0 10.8 9 26.1 30.9 84
SPRING CREEK DIVIDE 9000 20.7 25.6 81 26.2 32.3 81
THUMB DIVIDE 7980 6.0 10.5 57 21.3 24.8 86
TOGWOTEE PASS 9580 23.6 25.9 91 27.9 33.5 83
TWO OCEAN PLATEAU 9360 27.4 26.1 105 31.6 36.5 87
WILLOW CREEK 8450 18.0 27.3 66 37.7 38.0 99
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Basin wide percent of average 79 89
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 17.0 24.6 69 18.9 23.0 82
BLACK BEAR 7950 35.5 36.4 98 42.4 48.5 87
CANYON 7940 2.7 6.2 44 17.0 17.6 97
FISHER CREEK 9100 27.3 37.1 74 32.2 44.5 72
MADISON PLATEAU 7750 15.6 18.2 86 27.8 31.5 88
NORTHEAST ENTRANCE 7350 .0 2.5 0 13.2 15.2 87
PARKER PEAK 9400 14.7 22.5 65 18.6 19.8 94
SYLVAN LAKE 8420 10.7 20.2 53 23.8 24.2 98
THUMB DIVIDE 7980 6.0 10.5 57 21.3 24.8 86
TWO OCEAN PLATEAU 9360 27.4 26.1 105 31.6 36.5 87
WHISKEY CREEK 6800 8.7 9.0 97 23.1 26.2 88
WHITE MILL 8700 20.4 24.6 83 24.4 34.5 71
WOLVERINE 7650 .0 2.8 0 10.8 16.6 65
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Basin wide percent of average 77 84
WIND RIVER
BURROUGHS CREEK 8750 12.0 6.6 182 20.3 20.9 97
COLD SPRINGS 9630 6.1 2.7 226 16.3 14.6 112
DEER PARK 9700 -M -M * 26.1 -M *
HOBBS PARK 10100 19.9 16.5 121 20.5 19.0 108
LITTLE WARM 9620 6.3 5.1 124 17.1 17.8 96
SOUTH PASS 9040 13.3 16.1 83 22.7 22.2 102
ST. LAWRENCE ALT 8620 3.9 2.3 170 14.9 13.6 110
TOGWOTEE PASS 9580 23.6 25.9 91 27.9 33.5 83
TOWNSEND CREEK 8700 7.7 5.8 133 18.4 17.0 108
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Basin wide percent of average 115 100
BIGHORN BASIN
BALD MTN. 9375 19.6 24.1 81 20.6 23.0 90
BEAR TRAP MEADOW 7900 .0 1.3 0 13.1 12.2 107
BLACKWATER 9780 21.0 24.4 86 21.3 22.2 96
BONE SPRINGS DIV 9350 15.5 16.1 96 20.1 20.1 100
EVENING STAR 9200 19.2 30.0 64 28.2 27.8 101
GRAVE SPRINGS 8550 8.6 -M * 15.6 14.2 110
KIRWIN 9550 10.6 9.8 108 17.4 14.7 118
MARQUETTE 8760 10.5 7.4 142 17.3 15.3 113
MIDDLE POWDER 7760 7.1 13.3 53 14.5 16.4 88
OWL CREEK 8975 .1 .9 11 10.7 9.4 114
POWDER RIVER PASS 9480 9.2 5.9 156 17.4 16.4 106
SHELL CREEK 9580 13.3 16.7 80 14.4 17.8 81
SYLVAN LAKE 8420 10.7 20.2 53 23.8 24.2 98
SYLVAN ROAD 8120 .0 3.8 0 16.0 20.1 80
TIMBER CREEK 7950 1.3 2.4 54 13.0 11.8 110
YOUNTS PEAK 8350 13.1 15.4 85 17.8 20.8 86
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Basin wide percent of average 79 98
SHOSHONE RIVER
BLACKWATER 9780 21.0 24.4 86 21.3 22.2 96
EVENING STAR 9200 19.2 30.0 64 28.2 27.8 101
KIRWIN 9550 10.6 9.8 108 17.4 14.7 118
MARQUETTE 8760 10.5 7.4 142 17.3 15.3 113
SYLVAN LAKE 8420 10.7 20.2 53 23.8 24.2 98
SYLVAN ROAD 8120 .0 3.8 0 16.0 20.1 80
YOUNTS PEAK 8350 13.1 15.4 85 17.8 20.8 86
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Basin wide percent of average 77 98
POWDER-TONGUE
BEAR TRAP MEADOW 7900 .0 1.3 0 13.1 12.2 107
BONE SPRINGS DIV 9350 15.5 16.1 96 20.1 20.1 100
BURGESS JUNCTION 7880 8.0 10.6 75 15.3 16.0 96
CLOUD PEAK RESERVOIR 9860 15.3 15.6 98 20.9 19.1 109
DOME LAKE 8880 -M 9.9 * 17.2 18.2 95
GRAVE SPRINGS 8550 8.6 -M * 15.6 14.2 110
HANSEN SAWMILL 8760 .5 3.8 13 14.5 11.6 125
MIDDLE POWDER 7760 7.1 13.3 53 14.5 16.4 88
POWDER RIVER PASS 9480 9.2 5.9 156 17.4 16.4 106
SUCKER CREEK 8880 7.2 10.1 71 17.1 18.4 93
TIE CREEK 6870 .0 -M * 16.5 15.3 108
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Basin wide percent of average 82 102
BELLE FOURCHE
BLIND PARK 6890 .5 4.3 12 15.7 15.9 99
NORTH RAPID CREEK 6130 .0 -M * 13.0 -M *
WARREN PEAK 6520 .3 4.3 7 13.2 11.8 112
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Basin wide percent of average 9 104
UPPER N. PLATTE RIVER
COLUMBINE 9400 2.2 13.4 16 26.8 29.5 91
DIVIDE PEAK 8800 9.9 11.9 83 24.3 29.0 84
ELK RIVER 8700 3.6 8.0 45 23.4 23.3 100
JOE WRIGHT 10120 21.5 23.3 92 30.0 32.5 92
NORTH FRENCH CREEK 10100 32.2 26.3 122 35.7 30.1 119
OLD BATTLE 10000 35.5 36.1 98 41.5 37.6 110
SOUTH BRUSH CREEK 8400 .9 5.6 16 16.2 21.9 74
TOWER 10500 54.0 50.4 107 47.8 46.2 103
WEBBER SPRINGS 9200 13.6 19.9 68 30.3 32.1 94
WILLOW CREEK PASS 9540 7.2 10.2 71 10.7 16.8 64
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Basin wide percent of average 88 96
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 20.1 24.2 83 27.3 25.4 107
CASPER MTN. 7900 .4 10.7 4 15.4 20.8 74
DEADMAN HILL 10220 16.1 18.1 89 19.3 22.8 85
DEER PARK 9700 -M -M * 26.1 -M *
LAPRELE CREEK 8320 .0 3.3 0 13.1 16.3 80
RENO HILL 8400 .0 8.3 0 14.5 23.3 62
ROACH 9700 12.8 15.5 83 21.7 27.9 78
SAND LAKE 10080 30.4 34.8 87 29.8 26.5 112
SOUTH PASS 9040 13.3 16.1 83 22.7 22.2 102
WINDY PEAK 7840 .0 3.3 0 11.6 13.9 83
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Basin wide percent of average 69 88
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .1 .0 * 18.0 19.7 91
DIVIDE PEAK 8800 9.9 11.9 83 24.3 29.0 84
OLD BATTLE 10000 35.5 36.1 98 41.5 37.6 110
SANDSTONE RS 8150 .0 2.2 0 22.9 24.5 93
WHISKEY PARK 8950 28.9 24.5 118 34.7 36.1 96
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Basin wide percent of average 99 96
UPPER GREEN RIVER
BIG SANDY OPENING 9100 8.8 9.2 96 16.1 19.5 83
BLIND BULL SUM 8650 22.1 22.0 100 22.6 28.2 80
EAST RIM DIVIDE 7930 7.9 12.4 64 14.3 18.2 79
ELKHART PARK G.S. 9400 8.3 9.5 87 17.1 19.2 89
GROS VENTRE SUMMIT 8775 8.4 9.5 88 16.2 19.1 85
KENDALL R.S. 7740 .1 .0 * 17.7 18.6 95
LOOMIS PARK 8240 -M 10.6 * 20.5 22.6 91
NEW FORK LAKE 8340 1.7 5.8 29 13.6 17.3 79
SNIDER BASIN 8250 6.5 8.0 81 15.6 18.2 86
SPRING CREEK DIVIDE 9000 20.7 25.6 81 26.2 32.3 81
TRIPLE PEAK 8500 12.5 20.8 60 26.1 36.8 71
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Basin wide percent of average 79 82
LOWER GREEN RIVER
HAMS FORK 7840 .0 .0 100* 14.2 16.0 89
HEWINTA 9500 4.3 .0 * 18.6 17.6 106
HICKERSON PARK 9150 6.5 .6 1083* 17.8 13.7 130
HOLE-IN-ROCK 9150 2.0 .5 400* 15.3 13.7 112
INDIAN CREEK 9425 22.2 24.5 91 23.9 30.7 78
KELLEY R.S. 8180 7.9 9.4 84 20.3 22.5 90
STEEL CREEK PARK 10100 22.4 16.3 137 23.0 17.9 128
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Basin wide percent of average 119* 101
UPPER BEAR RIVER
BUG LAKE 7950 13.9 9.6 145 25.4 23.7 107
HAYDEN FORK 9400 6.6 .7 943* 25.9 24.5 106
KELLEY R.S. 8180 7.9 9.4 84 20.3 22.5 90
LILY LAKE 9050 7.2 5.4 133 22.5 19.5 115
MONTE CRISTO 8960 -M 21.2 * -M 31.9 *
SALT RIVER SUMMIT 7600 4.2 .0 * 22.7 20.3 112
TRIAL LAKE 9960 21.0 20.5 102 29.0 29.9 97
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Basin wide percent of average 124 104
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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.