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: MARCH 31 , 2003
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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 20.9 18.1 115 22.8 21.6 106
COTTONWOOD CREEK 7600 23.3 24.0 97 24.4 27.6 88
GRANITE CREEK 6770 15.0 18.6 81 17.3 20.0 86
GRASSY LAKE 7265 32.8 35.9 91 32.7 36.2 90
GROS VENTRE SUMMIT 8775 13.1 14.3 92 12.0 12.9 93
LEWIS LAKE DIVIDE 7860 34.6 35.6 97 30.3 37.0 82
PHILLIPS BENCH 8200 -M 29.0 * -M 29.2 *
SALT RIVER SUMMIT 7600 12.0 14.5 83 14.2 18.9 75
SNAKE RIVER STATION 6920 15.2 19.1 80 21.2 22.4 95
SPRING CREEK DIVIDE 9000 -M 26.8 * -M 26.7 *
THUMB DIVIDE 7980 16.2 19.1 85 16.1 19.0 85
TOGWOTEE PASS 9580 24.3 25.1 97 24.4 24.8 98
TWO OCEAN PLATEAU 9360 32.3 28.2 115 26.5 27.9 95
WILLOW CREEK 8450 30.2 30.4 99 33.4 32.4 103
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Basin wide percent of average 95 92
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 26.4 23.5 112 23.1 20.2 114
BLACK BEAR 8170 31.7 39.6 80 29.5 40.7 72
CANYON 8090 13.6 13.8 99 14.5 15.5 94
FISHER CREEK 9100 36.3 35.2 103 33.3 36.6 91
MADISON PLATEAU 7750 18.6 25.4 73 18.7 26.9 70
NORTHEAST ENTRANCE 7350 11.3 11.3 100 13.3 12.7 105
PARKER PEAK 9400 25.0 21.8 115 20.3 16.3 125
SYLVAN LAKE 8420 21.1 22.7 93 23.2 21.0 110
THUMB DIVIDE 7980 16.2 19.1 85 16.1 19.0 85
TWO OCEAN PLATEAU 9360 32.3 28.2 115 26.5 27.9 95
WHISKEY CREEK 6800 11.3 17.3 65 14.3 21.1 68
WHITE MILL 8700 26.8 24.5 109 23.2 27.2 85
WOLVERINE 7650 12.9 11.6 111 12.4 12.8 97
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Basin wide percent of average 96 90
WIND RIVER
BURROUGHS CREEK 8750 18.2 14.7 124 19.4 16.3 119
COLD SPRINGS 9630 9.0 8.9 101 10.8 10.6 102
DEER PARK 9700 15.1 17.0 89 17.6 22.0 80
HOBBS PARK 10100 14.8 15.0 99 13.2 12.8 103
LITTLE WARM 9370 10.2 11.9 86 11.4 13.4 85
SOUTH PASS 9040 14.5 16.6 87 14.8 18.5 80
ST. LAWRENCE ALT 8620 7.9 7.4 107 9.0 8.8 102
TOGWOTEE PASS 9580 24.3 25.1 97 24.4 24.8 98
TOWNSEND CREEK 8700 10.6 8.7 122 12.2 11.6 105
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Basin wide percent of average 99 96
BIGHORN BASIN
BALD MTN. 9380 19.4 19.8 98 17.5 17.4 101
BEAR TRAP MEADOW 8200 7.4 5.2 142 7.7 8.2 94
BLACKWATER 9780 26.1 24.7 106 22.5 20.6 109
BONE SPRINGS DIV 9350 17.3 16.3 106 16.0 14.6 110
EVENING STAR 9200 30.4 29.9 102 31.5 25.4 124
GRAVE SPRINGS 8550 6.9 9.3 74 7.8 9.6 81
KIRWIN 9550 12.5 11.4 110 13.3 11.2 119
MARQUETTE 8760 13.3 8.9 149 13.8 9.7 142
MIDDLE POWDER 7760 8.8 11.7 75 7.4 12.3 60
OWL CREEK 8975 7.2 5.5 131 6.6 5.9 112
POWDER RIVER PASS 9480 10.8 10.8 100 11.8 12.3 96
SHELL CREEK 9580 15.8 14.8 107 14.2 13.3 107
SYLVAN LAKE 8420 21.1 22.7 93 23.2 21.0 110
SYLVAN ROAD 7120 14.1 12.9 109 17.5 17.7 99
TIMBER CREEK 7950 6.5 5.7 114 7.6 7.3 104
YOUNTS PEAK 8350 17.3 17.2 101 16.9 16.2 104
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Basin wide percent of average 104 106
SHOSHONE RIVER
BLACKWATER 9780 26.1 24.7 106 22.5 20.6 109
EVENING STAR 9200 30.4 29.9 102 31.5 25.4 124
KIRWIN 9550 12.5 11.4 110 13.3 11.2 119
MARQUETTE 8760 13.3 8.9 149 13.8 9.7 142
SYLVAN LAKE 8420 21.1 22.7 93 23.2 21.0 110
SYLVAN ROAD 7120 14.1 12.9 109 17.5 17.7 99
YOUNTS PEAK 8350 17.3 17.2 101 16.9 16.2 104
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Basin wide percent of average 106 114
POWDER-TONGUE
BEAR TRAP MEADOW 8200 7.4 5.2 142 7.7 8.2 94
BIG GOOSE 7990 12.5 10.6 118 13.6 8.4 162
BONE SPRINGS DIV 9350 17.3 16.3 106 16.0 14.6 110
BURGESS JUNCTION 7880 12.5 11.6 108 13.0 12.1 107
CLOUD PEAK RESERVOIR 9860 16.6 13.4 124 14.1 12.8 110
DOME LAKE 8880 14.6 12.5 117 14.7 13.1 112
GRAVE SPRINGS 8550 6.9 9.3 74 7.8 9.6 81
HANSEN SAWMILL 8360 9.8 6.5 151 10.7 8.1 132
MIDDLE POWDER 7760 8.8 11.7 75 7.4 12.3 60
POWDER RIVER PASS 9480 10.8 10.8 100 11.8 12.3 96
SUCKER CREEK 8880 15.2 11.7 130 15.5 13.5 115
TIE CREEK 6870 9.0 6.1 148 13.2 9.8 135
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Basin wide percent of average 112 108
BELLE FOURCHE
BLIND PARK 6890 8.4 8.7 97 10.0 11.0 91
COLE CANYON 5910 4.6 -M * 6.5 -M *
NORTH RAPID CREEK 6130 5.6 8.3 67 8.3 8.6 97
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Basin wide percent of average 82 93
UPPER N. PLATTE RIVER
COLUMBINE 9400 22.5 24.9 90 23.8 25.2 94
DIVIDE PEAK 8800 21.8 19.9 110 20.8 20.7 100
ELK RIVER 8700 17.8 19.5 91 18.9 19.6 96
JOE WRIGHT 10120 24.3 21.4 114 28.2 24.7 114
NORTH FRENCH CREEK 10100 30.7 29.3 105 27.1 24.7 110
OLD BATTLE 10000 -M 32.2 * -M 34.6 *
SAGE CREEK BASIN 7850 11.5 11.5 100 12.3 12.0 103
SOUTH BRUSH CREEK 8400 14.2 13.1 108 16.9 16.3 104
TOWER 10500 42.8 45.5 94 33.6 38.4 88
WEBBER SPRINGS 9200 22.3 26.3 85 24.9 26.6 94
WILLOW CREEK PASS 9540 15.7 12.0 131 14.2 12.8 111
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Basin wide percent of average 100 100
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 17.9 23.7 76 20.9 22.0 95
CASPER MTN. 7900 14.6 14.5 101 11.3 14.3 79
DEADMAN HILL 10220 13.9 16.3 85 17.4 16.9 103
DEER PARK 9700 15.1 17.0 89 17.6 22.0 80
LAPRELE CREEK 8320 8.8 10.9 81 10.7 12.5 86
RENO HILL 8400 12.9 14.2 91 13.2 14.9 89
ROACH 9700 17.9 17.1 105 19.5 18.6 105
SAND LAKE 10080 25.3 32.5 78 -M 24.0 *
SOUTH PASS 9040 14.5 16.6 87 14.8 18.5 80
WINDY PEAK 7840 10.3 8.0 129 11.3 10.5 108
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Basin wide percent of average 89 91
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 12.6 11.0 115 15.3 15.8 97
DIVIDE PEAK 8800 21.8 19.9 110 20.8 20.7 100
OLD BATTLE 10000 -M 32.2 * -M 34.6 *
SANDSTONE RS 8150 14.0 14.8 95 18.1 18.7 97
WHISKEY PARK 8950 26.8 30.2 89 26.6 28.6 93
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Basin wide percent of average 99 96
UPPER GREEN RIVER
BIG SANDY OPENING 9100 12.0 14.6 82 11.1 13.4 83
BLIND BULL SUM 8650 23.8 28.1 85 17.4 22.4 78
EAST RIM DIVIDE 7930 10.9 13.2 83 10.6 12.1 88
ELKHART PARK G.S. 9400 13.6 13.5 101 12.9 13.3 97
GROS VENTRE SUMMIT 8775 13.1 14.3 92 12.0 12.9 93
KENDALL R.S. 7740 13.1 14.6 90 13.4 14.6 92
LOOMIS PARK 8240 18.5 17.4 106 16.4 17.5 94
NEW FORK LAKE 8340 10.8 11.3 96 -M 11.3 *
SNIDER BASIN 8250 13.8 14.6 95 13.6 16.2 84
SPRING CREEK DIVIDE 9000 -M 26.8 * -M 26.7 *
TRIPLE PEAK 8500 25.6 25.1 102 26.6 25.0 106
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Basin wide percent of average 93 91
LOWER GREEN RIVER
HAMS FORK 7840 11.9 12.0 99 11.0 12.2 90
HEWINTA 9500 10.5 12.0 88 11.6 14.6 79
HICKERSON PARK 9150 6.9 7.6 91 8.4 7.9 106
HOLE-IN-ROCK 9150 7.8 7.2 108 9.0 7.4 122
INDIAN CREEK 9425 24.0 28.0 86 20.0 25.6 78
KELLEY R.S. 8180 13.8 17.0 81 14.7 20.5 72
STEEL CREEK PARK 10100 12.8 15.8 81 12.9 16.2 80
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Basin wide percent of average 88 84
UPPER BEAR RIVER
BUG LAKE 7950 16.1 21.1 76 15.9 19.4 82
HAYDEN FORK 9400 14.5 16.5 88 17.7 21.1 84
KELLEY R.S. 8180 13.8 17.0 81 14.7 20.5 72
LILY LAKE 9050 12.0 13.4 90 13.9 17.5 79
MONTE CRISTO 8960 15.8 30.0 53 20.5 25.6 80
SALT RIVER SUMMIT 7600 12.0 14.5 83 14.2 18.9 75
TRIAL LAKE 9960 14.0 25.2 56 15.8 25.0 63
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Basin wide percent of average 71 76
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-M = Missing data
* = Data may not provide a valid measure of conditions.
Units = inches for the Current and Average Snow Water Equivalent and
Total Precipitation values
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 1971-2000.
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.