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: MARCH 23 , 1999
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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 24.0 17.2 140 26.7 22.0 121
COTTONWOOD CREEK 7600 24.3 23.0 106 26.7 24.7 108
GRANITE CREEK 6770 21.2 17.9 118 22.6 23.2 97
GRASSY LAKE 7265 41.5 34.6 120 39.6 36.5 108
GROS VENTRE SUMMIT 8775 15.3 15.1 101 14.8 15.7 94
LEWIS LAKE DIVIDE 7860 40.2 34.2 118 39.1 37.0 106
PHILLIPS BENCH 8200 31.6 28.1 112 30.9 29.3 105
SALT RIVER SUMMIT 7600 15.6 13.9 112 17.9 16.7 107
SNAKE RIVER STATION 6920 21.8 18.2 120 25.1 25.6 98
SPRING CREEK DIVIDE 9000 28.3 27.0 105 26.8 26.9 100
THUMB DIVIDE 7980 -M 16.5 * -M 20.6 *
TOGWOTEE PASS 9580 -M 24.0 * 27.8 27.8 100
TWO OCEAN PLATEAU 9360 35.4 25.7 138 -M 30.3 *
WILLOW CREEK 8450 32.5 29.4 111 36.7 31.7 116
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Basin wide percent of average 117 106
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 25.7 22.7 113 23.0 17.3 133
BLACK BEAR 7950 49.0 36.8 133 -M 39.1 *
CANYON 7940 17.7 12.5 142 18.4 13.7 134
FISHER CREEK 9100 39.3 34.5 114 -M 35.2 *
MADISON PLATEAU 7750 -M 23.7 * -M 25.3 *
NORTHEAST ENTRANCE 7350 12.0 9.0 133 13.9 11.4 122
PARKER PEAK 9400 22.8 20.8 110 -M 14.9 *
SYLVAN LAKE 8420 25.2 21.3 118 26.8 18.4 146
THUMB DIVIDE 7980 -M 16.5 * -M 20.6 *
TWO OCEAN PLATEAU 9360 35.4 25.7 138 -M 30.3 *
WHISKEY CREEK 6800 20.2 16.7 121 23.5 21.0 112
WHITE MILL 8700 27.2 24.3 112 24.3 27.3 89
WOLVERINE 7650 12.7 11.3 112 12.3 12.3 100
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Basin wide percent of average 122 117
WIND RIVER
BURROUGHS CREEK 8750 16.6 14.6 114 17.8 15.9 112
COLD SPRINGS 9630 9.0 8.0 112 11.1 10.0 111
DEER PARK 9700 16.0 -M * 20.8 -M *
HOBBS PARK 10100 16.5 14.3 115 14.7 13.3 111
LITTLE WARM 9620 13.4 11.0 122 14.8 12.6 117
SOUTH PASS 9040 16.9 15.8 107 17.9 16.1 111
ST. LAWRENCE ALT 8620 6.5 7.3 89 9.5 9.6 99
TOGWOTEE PASS 9580 -M 24.0 * 27.8 27.8 100
TOWNSEND CREEK 8700 9.0 9.4 96 11.9 11.7 102
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Basin wide percent of average 109 107
BIGHORN BASIN
BALD MTN. 9375 19.1 19.6 97 17.8 16.4 109
BEAR TRAP MEADOW 7900 6.1 6.8 90 9.1 7.6 120
BLACKWATER 9780 29.3 21.2 138 24.0 17.3 139
BONE SPRINGS DIV 9350 15.1 15.7 96 15.2 14.1 108
EVENING STAR 9200 32.4 25.9 125 33.3 21.6 154
GRAVE SPRINGS 8550 8.0 9.0 89 10.6 9.0 118
KIRWIN 9550 12.2 9.5 128 13.8 10.2 135
MARQUETTE 8760 8.0 7.7 104 8.8 8.8 100
MIDDLE POWDER 7760 10.2 11.5 89 15.0 11.0 136
OWL CREEK 8975 6.0 4.3 140 6.6 5.8 114
POWDER RIVER PASS 9480 12.3 10.4 118 14.8 10.9 136
SHELL CREEK 9580 15.9 14.4 110 14.7 12.4 119
SYLVAN LAKE 8420 25.2 21.3 118 26.8 18.4 146
SYLVAN ROAD 8120 16.7 12.4 135 18.9 15.4 123
TIMBER CREEK 7950 4.8 5.9 81 6.4 6.4 100
YOUNTS PEAK 8350 20.9 16.6 126 18.8 15.9 118
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Basin wide percent of average 114 127
SHOSHONE RIVER
BLACKWATER 9780 29.3 21.2 138 24.0 17.3 139
EVENING STAR 9200 32.4 25.9 125 33.3 21.6 154
KIRWIN 9550 12.2 9.5 128 13.8 10.2 135
MARQUETTE 8760 8.0 7.7 104 8.8 8.8 100
SYLVAN LAKE 8420 25.2 21.3 118 26.8 18.4 146
SYLVAN ROAD 8120 16.7 12.4 135 18.9 15.4 123
YOUNTS PEAK 8350 20.9 16.6 126 18.8 15.9 118
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Basin wide percent of average 126 134
POWDER-TONGUE
BEAR TRAP MEADOW 7900 6.1 6.8 90 9.1 7.6 120
BIG GOOSE 7990 6.1 -M * 9.3 -M *
BONE SPRINGS DIV 9350 15.1 15.7 96 15.2 14.1 108
BURGESS JUNCTION 7880 8.3 11.2 74 10.0 10.7 93
CLOUD PEAK RESERVOIR 9860 14.2 13.9 102 12.7 12.4 102
DOME LAKE 8880 -M 13.1 * 10.4 12.4 84
GRAVE SPRINGS 8550 8.0 9.0 89 10.6 9.0 118
HANSEN SAWMILL 8760 5.3 6.8 78 7.8 7.3 107
MIDDLE POWDER 7760 10.2 11.5 89 15.0 11.0 136
POWDER RIVER PASS 9480 12.3 10.4 118 14.8 10.9 136
SUCKER CREEK 8880 9.9 11.5 86 12.4 12.3 101
TIE CREEK 6870 3.2 -M * 8.0 10.2 78
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Basin wide percent of average 92 107
BELLE FOURCHE
BLIND PARK 6890 7.6 10.6 72 14.9 9.3 160
NORTH RAPID CREEK 6130 5.7 -M * 12.6 -M *
WARREN PEAK 6520 10.4 10.6 98 14.0 7.5 187
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Basin wide percent of average 85 172
UPPER N. PLATTE RIVER
COLUMBINE 9400 20.0 24.1 83 20.7 23.3 89
DIVIDE PEAK 8800 17.8 19.9 89 22.6 21.6 105
ELK RIVER 8700 16.5 19.2 86 20.4 18.1 113
JOE WRIGHT 10120 19.7 20.8 95 24.9 23.6 106
NORTH FRENCH CREEK 10100 27.2 24.2 112 27.3 22.2 123
OLD BATTLE 10000 26.3 30.3 87 33.2 28.5 116
SOUTH BRUSH CREEK 8400 11.3 12.2 93 18.1 15.3 118
TOWER 10500 40.8 43.2 94 36.8 34.4 107
WEBBER SPRINGS 9200 17.9 26.5 68 24.1 23.9 101
WILLOW CREEK PASS 9540 11.1 11.2 99 11.3 11.8 96
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Basin wide percent of average 90 107
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 16.0 24.4 66 20.8 18.3 114
CASPER MTN. 7900 10.5 15.2 69 15.5 13.1 118
DEADMAN HILL 10220 15.2 15.8 96 16.6 15.6 106
DEER PARK 9700 16.0 -M * 20.8 -M *
LAPRELE CREEK 8320 -M 10.0 * 13.7 11.0 125
RENO HILL 8400 12.7 13.3 95 17.3 17.9 97
ROACH 9700 15.4 16.4 94 18.2 20.0 91
SAND LAKE 10080 32.1 31.4 102 26.5 19.2 138
SOUTH PASS 9040 16.9 15.8 107 17.9 16.1 111
WINDY PEAK 7840 6.3 8.2 77 12.1 8.8 138
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Basin wide percent of average 89 113
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 11.5 11.0 105 16.1 14.5 111
DIVIDE PEAK 8800 17.8 19.9 89 22.6 21.6 105
OLD BATTLE 10000 26.3 30.3 87 33.2 28.5 116
SANDSTONE RS 8150 11.3 14.3 79 18.9 17.7 107
WHISKEY PARK 8950 24.5 27.6 89 27.6 26.5 104
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Basin wide percent of average 89 109
UPPER GREEN RIVER
BIG SANDY OPENING 9100 15.9 14.0 114 14.8 16.0 93
BLIND BULL SUM 8650 28.1 28.4 99 21.5 23.6 91
EAST RIM DIVIDE 7930 13.4 13.6 99 13.5 14.9 91
ELKHART PARK G.S. 9400 13.5 13.3 102 13.9 15.7 89
GROS VENTRE SUMMIT 8775 15.3 15.1 101 14.8 15.7 94
KENDALL R.S. 7740 15.0 14.5 103 15.5 15.3 101
LOOMIS PARK 8240 -M 17.0 * 19.4 18.6 104
NEW FORK LAKE 8340 12.5 11.0 114 11.6 14.2 82
SNIDER BASIN 8250 16.0 14.4 111 16.1 14.9 108
SPRING CREEK DIVIDE 9000 28.3 27.0 105 26.8 26.9 100
TRIPLE PEAK 8500 27.7 24.8 112 28.3 30.6 92
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Basin wide percent of average 105 95
LOWER GREEN RIVER
HAMS FORK 7840 13.4 12.1 111 10.8 13.2 82
HEWINTA 9500 11.0 10.7 103 13.5 12.3 110
HICKERSON PARK 9150 6.3 6.3 100 9.0 8.8 102
HOLE-IN-ROCK 9150 5.5 6.0 92 -M 8.8 *
INDIAN CREEK 9425 28.4 27.5 103 23.7 25.4 93
KELLEY R.S. 8180 16.5 16.6 99 18.0 18.5 97
STEEL CREEK PARK 10100 13.8 15.4 90 15.7 12.1 130
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Basin wide percent of average 100 100
UPPER BEAR RIVER
BUG LAKE 7950 21.5 20.0 108 18.7 18.5 101
HAYDEN FORK 9400 15.0 15.9 94 19.8 18.0 110
KELLEY R.S. 8180 16.5 16.6 99 18.0 18.5 97
LILY LAKE 9050 12.8 12.6 102 17.3 13.9 124
MONTE CRISTO 8960 25.0 28.0 89 25.0 24.3 103
SALT RIVER SUMMIT 7600 15.6 13.9 112 17.9 16.7 107
TRIAL LAKE 9960 20.5 24.3 84 21.0 22.8 92
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Basin wide percent of average 97 104
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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.