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 SUNDAY: DECEMBER 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 4.9 5.4 91 7.0 8.3 84
COTTONWOOD CREEK 7600 4.1 6.1 67 7.5 8.8 85
GRANITE CREEK 6770 3.3 5.0 66 5.2 8.7 60
GRASSY LAKE 7265 9.2 9.7 95 11.4 13.5 84
GROS VENTRE SUMMIT 8775 4.7 5.0 94 5.4 6.0 90
LEWIS LAKE DIVIDE 7860 9.3 9.5 98 11.9 13.7 87
PHILLIPS BENCH 8200 7.0 7.8 90 7.8 10.6 74
SALT RIVER SUMMIT 7600 2.1 3.2 66 4.7 6.3 75
SNAKE RIVER STATION 6920 4.7 5.3 89 7.1 9.4 76
SPRING CREEK DIVIDE 9000 5.6 8.4 67 6.8 9.7 70
THUMB DIVIDE 7980 7.7 5.1 151 8.3 7.7 108
TOGWOTEE PASS 9580 8.0 8.2 98 8.5 10.2 83
TWO OCEAN PLATEAU 9360 11.8 9.9 119 10.9 11.5 95
WILLOW CREEK 8450 6.7 9.0 74 12.1 11.6 104
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Basin wide percent of average 91 84
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 -M 8.8 * -M 6.4 *
BLACK BEAR 7950 15.0 11.2 134 15.0 12.7 118
CANYON 7940 5.0 3.8 132 5.9 5.3 111
FISHER CREEK 9100 12.9 11.5 112 12.0 11.8 102
MADISON PLATEAU 7750 -M 7.3 * 11.3 8.8 128
NORTHEAST ENTRANCE 7350 2.6 2.8 93 4.5 4.5 100
PARKER PEAK 9400 7.3 8.7 84 -M 6.0 *
SYLVAN LAKE 8420 9.0 8.5 106 11.2 7.8 144
THUMB DIVIDE 7980 7.7 5.1 151 8.3 7.7 108
TWO OCEAN PLATEAU 9360 11.8 9.9 119 10.9 11.5 95
WHISKEY CREEK 6800 6.8 5.0 136 8.9 7.2 124
WHITE MILL 8700 7.7 8.2 94 7.7 9.6 80
WOLVERINE 7650 3.9 3.5 111 4.5 5.0 90
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Basin wide percent of average 115 109
WIND RIVER
BURROUGHS CREEK 8750 3.9 5.2 75 4.5 6.3 71
COLD SPRINGS 9630 4.1 3.5 117 5.6 4.6 122
DEER PARK 9700 4.9 -M * 7.1 -M *
HOBBS PARK 10100 7.1 6.1 116 7.4 5.4 137
LITTLE WARM 9620 4.4 4.1 107 5.5 5.3 104
SOUTH PASS 9040 4.6 6.6 70 6.5 6.3 103
ST. LAWRENCE ALT 8620 3.4 2.5 136 6.0 4.3 140
TOGWOTEE PASS 9580 8.0 8.2 98 8.5 10.2 83
TOWNSEND CREEK 8700 3.7 3.5 106 6.5 4.6 141
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Basin wide percent of average 99 107
BIGHORN BASIN
BALD MTN. 9375 5.5 7.7 71 5.7 6.5 88
BEAR TRAP MEADOW 7900 2.3 2.7 85 5.6 3.6 156
BLACKWATER 9780 11.3 7.4 153 10.2 6.8 150
BONE SPRINGS DIV 9350 4.3 6.2 69 4.9 5.4 91
EVENING STAR 9200 10.3 10.5 98 10.8 8.3 130
GRAVE SPRINGS 8550 2.4 3.6 67 5.6 4.2 133
KIRWIN 9550 4.7 4.2 112 5.3 4.3 123
MARQUETTE 8760 4.8 3.1 155 5.8 4.0 145
MIDDLE POWDER 7760 2.3 4.5 51 8.4 4.8 175
OWL CREEK 8975 2.9 1.4 207 3.8 2.3 165
POWDER RIVER PASS 9480 2.5 4.1 61 4.5 4.5 100
SHELL CREEK 9580 4.9 5.9 83 4.5 5.0 90
SYLVAN LAKE 8420 9.0 8.5 106 11.2 7.8 144
SYLVAN ROAD 8120 5.2 4.4 118 6.6 6.3 105
TIMBER CREEK 7950 2.8 1.7 165 4.4 2.8 157
YOUNTS PEAK 8350 5.9 6.9 86 5.5 6.2 89
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Basin wide percent of average 98 124
SHOSHONE RIVER
BLACKWATER 9780 11.3 7.4 153 10.2 6.8 150
EVENING STAR 9200 10.3 10.5 98 10.8 8.3 130
KIRWIN 9550 4.7 4.2 112 5.3 4.3 123
MARQUETTE 8760 4.8 3.1 155 5.8 4.0 145
SYLVAN LAKE 8420 9.0 8.5 106 11.2 7.8 144
SYLVAN ROAD 8120 5.2 4.4 118 6.6 6.3 105
YOUNTS PEAK 8350 5.9 6.9 86 5.5 6.2 89
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Basin wide percent of average 114 127
POWDER-TONGUE
BEAR TRAP MEADOW 7900 2.3 2.7 85 5.6 3.6 156
BIG GOOSE 7990 -M -M * -M -M *
BONE SPRINGS DIV 9350 4.3 6.2 69 4.9 5.4 91
BURGESS JUNCTION 7880 2.3 4.4 52 4.6 4.5 102
CLOUD PEAK RESERVOIR 9860 4.3 4.3 100 5.8 5.0 116
DOME LAKE 8880 -M 4.9 * -M 5.6 *
GRAVE SPRINGS 8550 2.4 3.6 67 5.6 4.2 133
HANSEN SAWMILL 8760 2.1 2.6 81 3.7 3.3 112
MIDDLE POWDER 7760 2.3 4.5 51 8.4 4.8 175
POWDER RIVER PASS 9480 2.5 4.1 61 4.5 4.5 100
SUCKER CREEK 8880 3.6 3.8 95 5.5 5.1 108
TIE CREEK 6870 .7 -M * 3.7 4.3 86
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Basin wide percent of average 72 117
BELLE FOURCHE
BLIND PARK 6890 1.2 4.2 29 7.6 3.8 200
NORTH RAPID CREEK 6130 1.3 -M * 8.1 -M *
WARREN PEAK 6520 1.6 4.2 38 7.6 3.2 238
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Basin wide percent of average 33 217
UPPER N. PLATTE RIVER
COLUMBINE 9400 3.3 6.8 49 6.2 8.0 78
DIVIDE PEAK 8800 5.5 7.3 75 11.7 8.7 134
ELK RIVER 8700 2.0 5.5 36 8.2 6.5 126
JOE WRIGHT 10120 6.4 8.2 78 9.5 9.3 102
NORTH FRENCH CREEK 10100 8.8 8.7 101 11.5 8.0 144
OLD BATTLE 10000 8.5 11.4 75 12.5 10.9 115
SOUTH BRUSH CREEK 8400 2.9 3.4 85 9.5 7.0 136
TOWER 10500 11.6 17.0 68 12.5 12.5 100
WEBBER SPRINGS 9200 4.8 9.1 53 9.2 10.3 89
WILLOW CREEK PASS 9540 4.0 4.2 95 5.0 4.8 104
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Basin wide percent of average 71 111
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 4.5 9.2 49 6.8 6.6 103
CASPER MTN. 7900 3.0 6.1 49 8.9 5.9 151
DEADMAN HILL 10220 5.7 6.0 95 6.7 6.0 112
DEER PARK 9700 4.9 -M * 7.1 -M *
LAPRELE CREEK 8320 .5 3.6 14 6.6 4.0 165
RENO HILL 8400 4.6 4.8 96 9.1 7.8 117
ROACH 9700 3.6 5.9 61 6.8 7.7 88
SAND LAKE 10080 9.9 11.5 86 11.7 7.3 160
SOUTH PASS 9040 4.6 6.6 70 6.5 6.3 103
WINDY PEAK 7840 .9 2.6 35 6.9 3.2 216
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Basin wide percent of average 66 128
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 -M 3.5 * 7.5 5.7 132
DIVIDE PEAK 8800 5.5 7.3 75 11.7 8.7 134
OLD BATTLE 10000 8.5 11.4 75 12.5 10.9 115
SANDSTONE RS 8150 2.2 4.4 50 8.3 6.7 124
WHISKEY PARK 8950 5.0 9.4 53 10.2 8.4 121
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Basin wide percent of average 65 124
UPPER GREEN RIVER
BIG SANDY OPENING 9100 4.3 4.2 102 4.2 6.1 69
BLIND BULL SUM 8650 6.2 9.7 64 6.7 8.1 83
EAST RIM DIVIDE 7930 2.5 3.7 68 3.5 5.6 63
ELKHART PARK G.S. 9400 3.4 4.2 81 4.3 6.0 72
GROS VENTRE SUMMIT 8775 4.7 5.0 94 5.4 6.0 90
KENDALL R.S. 7740 3.0 3.9 77 3.7 5.8 64
LOOMIS PARK 8240 3.2 4.8 67 4.6 7.0 66
NEW FORK LAKE 8340 2.4 3.1 77 3.1 5.4 57
SNIDER BASIN 8250 2.3 4.1 56 3.5 5.6 63
SPRING CREEK DIVIDE 9000 5.6 8.4 67 6.8 9.7 70
TRIPLE PEAK 8500 5.3 7.6 70 7.1 11.6 61
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Basin wide percent of average 73 69
LOWER GREEN RIVER
HAMS FORK 7840 1.4 2.8 50 3.1 5.0 62
HEWINTA 9500 2.1 2.9 72 5.0 5.2 96
HICKERSON PARK 9150 2.0 2.0 100 4.7 4.1 115
HOLE-IN-ROCK 9150 2.0 1.8 111 5.2 4.1 127
INDIAN CREEK 9425 5.6 8.3 67 5.9 9.4 63
KELLEY R.S. 8180 2.7 4.8 56 4.4 7.0 63
STEEL CREEK PARK 10100 3.3 5.8 57 6.2 5.5 113
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Basin wide percent of average 67 86
UPPER BEAR RIVER
BUG LAKE 7950 3.0 6.6 45 5.0 7.7 65
HAYDEN FORK 9400 3.4 4.9 69 6.6 6.8 97
KELLEY R.S. 8180 2.7 4.8 56 4.4 7.0 63
LILY LAKE 9050 3.6 4.5 80 6.8 5.9 115
MONTE CRISTO 8960 5.4 8.4 64 8.4 9.6 88
SALT RIVER SUMMIT 7600 2.1 3.2 66 4.7 6.3 75
TRIAL LAKE 9960 4.0 7.7 52 5.6 8.7 64
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Basin wide percent of average 60 80
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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.