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 TUESDAY: DECEMBER 29 , 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 8.2 7.5 109 10.3 10.7 96
COTTONWOOD CREEK 7600 8.1 8.4 96 11.2 11.4 98
GRANITE CREEK 6770 6.5 6.9 94 8.6 11.3 76
GRASSY LAKE 7265 13.9 13.6 102 15.5 17.5 89
GROS VENTRE SUMMIT 8775 6.2 6.6 94 6.6 7.7 86
LEWIS LAKE DIVIDE 7860 13.5 13.1 103 16.2 17.7 92
PHILLIPS BENCH 8200 11.3 10.9 104 11.7 13.7 85
SALT RIVER SUMMIT 7600 4.6 4.8 96 7.0 8.2 85
SNAKE RIVER STATION 6920 -M 7.2 * -M 12.3 *
SPRING CREEK DIVIDE 9000 9.8 11.1 88 10.7 12.7 84
THUMB DIVIDE 7980 9.7 6.9 141 10.0 10.1 99
TOGWOTEE PASS 9580 12.0 10.7 112 12.1 13.2 92
TWO OCEAN PLATEAU 9360 15.4 12.2 126 14.1 14.9 95
WILLOW CREEK 8450 11.3 12.2 93 16.8 15.0 112
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Basin wide percent of average 104 92
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 10.3 11.1 93 9.5 8.2 116
BLACK BEAR 7950 19.3 14.9 130 18.9 16.5 115
CANYON 7940 7.1 5.1 139 8.1 6.6 123
FISHER CREEK 9100 16.6 14.9 111 15.0 15.3 98
MADISON PLATEAU 7750 -M 9.7 * 13.1 11.2 117
NORTHEAST ENTRANCE 7350 4.0 3.8 105 5.7 5.6 102
PARKER PEAK 9400 10.0 10.3 97 -M 7.3 *
SYLVAN LAKE 8420 10.8 10.4 104 13.1 9.5 138
THUMB DIVIDE 7980 9.7 6.9 141 10.0 10.1 99
TWO OCEAN PLATEAU 9360 15.4 12.2 126 14.1 14.9 95
WHISKEY CREEK 6800 8.1 6.7 121 10.4 9.3 112
WHITE MILL 8700 10.0 10.9 92 9.6 12.3 78
WOLVERINE 7650 7.1 4.9 145 5.9 6.2 95
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Basin wide percent of average 115 106
WIND RIVER
BURROUGHS CREEK 8750 7.2 6.8 106 8.0 7.8 103
COLD SPRINGS 9630 4.9 4.3 114 6.5 5.4 120
DEER PARK 9700 6.2 -M * -M -M *
HOBBS PARK 10100 8.2 7.5 109 8.5 6.7 127
LITTLE WARM 9620 5.7 4.9 116 6.9 6.4 108
SOUTH PASS 9040 7.0 8.0 88 8.6 7.7 112
ST. LAWRENCE ALT 8620 3.9 3.2 122 6.5 4.9 133
TOGWOTEE PASS 9580 12.0 10.7 112 12.1 13.2 92
TOWNSEND CREEK 8700 4.4 4.3 102 7.1 5.6 127
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Basin wide percent of average 107 111
BIGHORN BASIN
BALD MTN. 9375 6.5 9.8 66 6.5 8.4 77
BEAR TRAP MEADOW 7900 2.8 3.5 80 6.1 4.2 145
BLACKWATER 9780 14.0 9.5 147 12.2 8.5 144
BONE SPRINGS DIV 9350 5.6 7.6 74 6.2 6.7 93
EVENING STAR 9200 14.1 12.5 113 14.5 10.4 139
GRAVE SPRINGS 8550 2.7 4.4 61 6.0 5.0 120
KIRWIN 9550 6.3 5.0 126 7.3 5.1 143
MARQUETTE 8760 5.0 3.7 135 6.2 4.6 135
MIDDLE POWDER 7760 3.2 5.5 58 9.8 5.8 169
OWL CREEK 8975 3.5 1.8 194 4.5 2.7 167
POWDER RIVER PASS 9480 3.9 4.9 80 5.8 5.4 107
SHELL CREEK 9580 6.1 7.3 84 5.5 6.2 89
SYLVAN LAKE 8420 10.8 10.4 104 13.1 9.5 138
SYLVAN ROAD 8120 6.8 5.6 121 8.5 7.7 110
TIMBER CREEK 7950 3.2 2.3 139 5.3 3.2 166
YOUNTS PEAK 8350 9.3 8.6 108 8.3 7.7 108
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Basin wide percent of average 101 124
SHOSHONE RIVER
BLACKWATER 9780 14.0 9.5 147 12.2 8.5 144
EVENING STAR 9200 14.1 12.5 113 14.5 10.4 139
KIRWIN 9550 6.3 5.0 126 7.3 5.1 143
MARQUETTE 8760 5.0 3.7 135 6.2 4.6 135
SYLVAN LAKE 8420 10.8 10.4 104 13.1 9.5 138
SYLVAN ROAD 8120 6.8 5.6 121 8.5 7.7 110
YOUNTS PEAK 8350 9.3 8.6 108 8.3 7.7 108
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Basin wide percent of average 120 131
POWDER-TONGUE
BEAR TRAP MEADOW 7900 2.8 3.5 80 6.1 4.2 145
BIG GOOSE 7990 2.8 -M * 6.2 -M *
BONE SPRINGS DIV 9350 5.6 7.6 74 6.2 6.7 93
BURGESS JUNCTION 7880 3.0 5.3 57 5.2 5.4 96
CLOUD PEAK RESERVOIR 9860 6.2 5.4 115 6.8 5.9 115
DOME LAKE 8880 3.2 6.1 52 4.9 6.7 73
GRAVE SPRINGS 8550 2.7 4.4 61 6.0 5.0 120
HANSEN SAWMILL 8760 2.9 3.2 91 5.0 3.8 132
MIDDLE POWDER 7760 3.2 5.5 58 9.8 5.8 169
POWDER RIVER PASS 9480 3.9 4.9 80 5.8 5.4 107
SUCKER CREEK 8880 3.9 5.0 78 6.7 6.3 106
TIE CREEK 6870 .9 -M * 4.1 5.2 79
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Basin wide percent of average 73 110
BELLE FOURCHE
BLIND PARK 6890 1.6 5.1 31 8.5 4.6 185
NORTH RAPID CREEK 6130 1.8 -M * 8.6 -M *
WARREN PEAK 6520 1.9 5.1 37 8.0 3.8 211
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Basin wide percent of average 34 196
UPPER N. PLATTE RIVER
COLUMBINE 9400 6.3 9.3 68 9.1 10.4 88
DIVIDE PEAK 8800 6.9 9.2 75 13.4 11.4 118
ELK RIVER 8700 3.7 7.7 48 9.8 8.4 117
JOE WRIGHT 10120 7.3 10.1 72 11.3 11.2 101
NORTH FRENCH CREEK 10100 10.7 11.0 97 13.2 10.4 127
OLD BATTLE 10000 10.3 14.3 72 15.2 13.7 111
SOUTH BRUSH CREEK 8400 3.5 4.6 76 10.6 9.4 113
TOWER 10500 14.3 21.1 68 15.9 16.0 99
WEBBER SPRINGS 9200 6.7 11.7 57 11.3 12.7 89
WILLOW CREEK PASS 9540 5.0 5.5 91 6.4 5.9 108
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Basin wide percent of average 71 106
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 6.4 11.6 55 9.0 8.3 108
CASPER MTN. 7900 3.5 7.3 48 9.4 6.9 136
DEADMAN HILL 10220 8.6 7.6 113 8.6 7.2 119
DEER PARK 9700 6.2 -M * -M -M *
LAPRELE CREEK 8320 .9 4.5 20 7.2 4.9 147
RENO HILL 8400 4.9 6.0 82 9.8 9.4 104
ROACH 9700 5.9 7.4 80 9.0 9.8 92
SAND LAKE 10080 11.8 14.5 81 13.5 9.1 148
SOUTH PASS 9040 7.0 8.0 88 8.6 7.7 112
WINDY PEAK 7840 1.6 3.2 50 7.9 4.0 198
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Basin wide percent of average 72 123
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 3.1 4.8 65 8.6 7.2 119
DIVIDE PEAK 8800 6.9 9.2 75 13.4 11.4 118
OLD BATTLE 10000 10.3 14.3 72 15.2 13.7 111
SANDSTONE RS 8150 -M 5.9 * -M 8.6 *
WHISKEY PARK 8950 7.2 12.3 59 12.7 11.3 112
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Basin wide percent of average 68 114
UPPER GREEN RIVER
BIG SANDY OPENING 9100 7.1 5.7 125 6.7 7.9 85
BLIND BULL SUM 8650 10.6 12.1 88 9.3 10.5 89
EAST RIM DIVIDE 7930 5.1 5.4 94 5.9 7.3 81
ELKHART PARK G.S. 9400 5.5 5.6 98 6.3 7.7 82
GROS VENTRE SUMMIT 8775 6.2 6.6 94 6.6 7.7 86
KENDALL R.S. 7740 5.8 5.6 104 6.6 7.5 88
LOOMIS PARK 8240 6.6 6.7 99 7.8 9.1 86
NEW FORK LAKE 8340 4.8 4.4 109 5.4 7.0 77
SNIDER BASIN 8250 5.3 5.7 93 6.3 7.3 86
SPRING CREEK DIVIDE 9000 9.8 11.1 88 10.7 12.7 84
TRIPLE PEAK 8500 10.0 10.4 96 11.6 15.0 77
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Basin wide percent of average 97 83
LOWER GREEN RIVER
HAMS FORK 7840 3.8 4.1 93 4.5 6.4 70
HEWINTA 9500 3.0 3.7 81 5.6 6.2 90
HICKERSON PARK 9150 2.2 2.5 88 5.0 4.7 106
HOLE-IN-ROCK 9150 3.0 2.2 136 5.5 4.7 117
INDIAN CREEK 9425 9.4 11.1 85 8.5 12.1 70
KELLEY R.S. 8180 5.5 6.4 86 7.3 9.0 81
STEEL CREEK PARK 10100 4.6 7.0 66 7.1 6.6 108
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Basin wide percent of average 85 88
UPPER BEAR RIVER
BUG LAKE 7950 5.2 8.5 61 6.5 9.2 71
HAYDEN FORK 9400 4.6 6.5 71 8.0 8.5 94
KELLEY R.S. 8180 5.5 6.4 86 7.3 9.0 81
LILY LAKE 9050 4.4 5.9 75 7.4 7.0 106
MONTE CRISTO 8960 6.6 10.6 62 10.1 11.9 85
SALT RIVER SUMMIT 7600 4.6 4.8 96 7.0 8.2 85
TRIAL LAKE 9960 4.7 10.3 46 6.0 10.6 57
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Basin wide percent of average 67 81
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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.