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 THURSDAY: APRIL 3 , 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 20.3 17.9 113 22.8 21.9 104
COTTONWOOD CREEK 7600 23.1 24.1 96 24.6 28.1 88
GRANITE CREEK 6770 14.4 18.4 78 17.4 20.3 86
GRASSY LAKE 7265 33.0 36.2 91 33.0 36.7 90
GROS VENTRE SUMMIT 8775 13.1 14.4 91 12.0 13.2 91
LEWIS LAKE DIVIDE 7860 34.4 35.9 96 30.5 37.5 81
PHILLIPS BENCH 8200 -M 29.4 * -M 29.6 *
SALT RIVER SUMMIT 7600 12.0 14.6 82 14.2 19.2 74
SNAKE RIVER STATION 6920 14.4 19.0 76 21.3 22.7 94
SPRING CREEK DIVIDE 9000 26.0 27.1 96 23.8 27.0 88
THUMB DIVIDE 7980 15.8 19.1 83 16.4 19.3 85
TOGWOTEE PASS 9580 24.3 25.4 96 24.4 25.2 97
TWO OCEAN PLATEAU 9360 32.6 28.7 114 26.8 28.3 95
WILLOW CREEK 8450 29.9 30.8 97 33.9 32.9 103
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Basin wide percent of average 94 91
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 26.5 23.9 111 23.0 20.5 112
BLACK BEAR 8170 32.3 40.0 81 30.0 41.2 73
CANYON 8090 13.8 13.9 99 14.7 15.7 94
FISHER CREEK 9100 36.9 35.6 104 34.0 37.1 92
MADISON PLATEAU 7750 19.2 25.6 75 19.1 27.3 70
NORTHEAST ENTRANCE 7350 11.0 11.2 98 13.4 12.9 104
PARKER PEAK 9400 25.2 22.1 114 20.6 16.6 124
SYLVAN LAKE 8420 -M 23.0 * -M 21.3 *
THUMB DIVIDE 7980 15.8 19.1 83 16.4 19.3 85
TWO OCEAN PLATEAU 9360 32.6 28.7 114 26.8 28.3 95
WHISKEY CREEK 6800 11.6 17.5 66 14.5 21.4 68
WHITE MILL 8700 27.2 24.8 110 23.6 27.6 86
WOLVERINE 7650 12.5 11.5 109 12.2 13.1 93
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Basin wide percent of average 97 88
WIND RIVER
BURROUGHS CREEK 8750 18.1 14.8 122 19.4 16.6 117
COLD SPRINGS 9630 8.7 8.7 100 10.7 10.9 98
DEER PARK 9700 15.2 17.1 89 17.8 22.4 79
HOBBS PARK 10100 14.9 15.3 97 13.3 13.2 101
LITTLE WARM 9370 10.0 12.1 83 11.5 13.7 84
SOUTH PASS 9040 14.5 16.8 86 14.8 18.9 78
ST. LAWRENCE ALT 8620 7.9 7.4 107 8.9 9.1 98
TOGWOTEE PASS 9580 24.3 25.4 96 24.4 25.2 97
TOWNSEND CREEK 8700 10.2 8.9 115 12.3 12.0 103
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Basin wide percent of average 98 94
BIGHORN BASIN
BALD MTN. 9380 19.5 20.2 97 17.6 17.8 99
BEAR TRAP MEADOW 8200 6.8 5.1 133 7.8 8.5 92
BLACKWATER 9780 26.3 25.1 105 22.7 21.0 108
BONE SPRINGS DIV 9350 17.7 16.6 107 16.5 14.9 111
EVENING STAR 9200 30.6 30.4 101 32.2 25.8 125
GRAVE SPRINGS 8550 6.7 9.6 70 7.9 9.9 80
KIRWIN 9550 12.6 11.6 109 13.4 11.5 117
MARQUETTE 8760 13.0 9.2 141 13.6 10.1 135
MIDDLE POWDER 7760 8.6 12.1 71 7.3 12.6 58
OWL CREEK 8975 7.2 5.5 131 6.4 6.1 105
POWDER RIVER PASS 9480 10.7 11.0 97 12.0 12.6 95
SHELL CREEK 9580 16.0 15.1 106 14.5 13.6 107
SYLVAN LAKE 8420 -M 23.0 * -M 21.3 *
SYLVAN ROAD 7120 14.1 12.8 110 17.6 18.0 98
TIMBER CREEK 7950 6.5 5.8 112 7.6 7.6 100
YOUNTS PEAK 8350 17.1 17.4 98 16.9 16.5 102
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Basin wide percent of average 103 104
SHOSHONE RIVER
BLACKWATER 9780 26.3 25.1 105 22.7 21.0 108
EVENING STAR 9200 30.6 30.4 101 32.2 25.8 125
KIRWIN 9550 12.6 11.6 109 13.4 11.5 117
MARQUETTE 8760 13.0 9.2 141 13.6 10.1 135
SYLVAN LAKE 8420 -M 23.0 * -M 21.3 *
SYLVAN ROAD 7120 14.1 12.8 110 17.6 18.0 98
YOUNTS PEAK 8350 17.1 17.4 98 16.9 16.5 102
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Basin wide percent of average 107 113
POWDER-TONGUE
BEAR TRAP MEADOW 8200 6.8 5.1 133 7.8 8.5 92
BIG GOOSE 7990 12.4 10.9 114 13.6 8.8 155
BONE SPRINGS DIV 9350 17.7 16.6 107 16.5 14.9 111
BURGESS JUNCTION 7880 -M 11.9 * -M 12.4 *
CLOUD PEAK RESERVOIR 9860 16.5 13.8 120 14.1 13.2 107
DOME LAKE 8880 14.5 12.8 113 14.9 13.4 111
GRAVE SPRINGS 8550 6.7 9.6 70 7.9 9.9 80
HANSEN SAWMILL 8360 9.2 6.5 142 10.7 8.4 127
MIDDLE POWDER 7760 8.6 12.1 71 7.3 12.6 58
POWDER RIVER PASS 9480 10.7 11.0 97 12.0 12.6 95
SUCKER CREEK 8880 15.0 12.0 125 15.7 13.9 113
TIE CREEK 6870 8.0 6.0 133 13.3 10.1 132
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Basin wide percent of average 108 106
BELLE FOURCHE
BLIND PARK 6890 7.3 8.5 86 9.9 11.3 88
COLE CANYON 5910 3.6 -M * 6.5 -M *
NORTH RAPID CREEK 6130 5.1 8.4 61 8.1 8.8 92
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Basin wide percent of average 73 90
UPPER N. PLATTE RIVER
COLUMBINE 9400 22.1 25.0 88 23.9 25.6 93
DIVIDE PEAK 8800 21.6 20.1 107 20.8 21.0 99
ELK RIVER 8700 17.4 19.6 89 18.9 19.9 95
JOE WRIGHT 10120 24.3 21.8 111 28.4 25.2 113
NORTH FRENCH CREEK 10100 31.0 29.9 104 29.6 25.1 118
OLD BATTLE 10000 -M 32.7 * -M 35.1 *
SAGE CREEK BASIN 7850 10.7 11.7 91 12.4 12.2 102
SOUTH BRUSH CREEK 8400 13.5 13.2 102 17.1 16.6 103
TOWER 10500 42.7 46.3 92 -M 39.0 *
WEBBER SPRINGS 9200 21.8 26.4 83 25.1 27.1 93
WILLOW CREEK PASS 9540 15.7 12.3 128 14.4 13.1 110
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Basin wide percent of average 98 103
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 18.0 24.3 74 21.1 22.4 94
CASPER MTN. 7900 14.6 14.9 98 11.5 14.7 78
DEADMAN HILL 10220 14.1 16.7 84 17.5 17.3 101
DEER PARK 9700 15.2 17.1 89 17.8 22.4 79
LAPRELE CREEK 8320 8.3 10.9 76 10.7 12.9 83
RENO HILL 8400 12.3 14.5 85 13.1 15.3 86
ROACH 9700 17.6 17.4 101 19.5 18.9 103
SAND LAKE 10080 25.5 33.0 77 -M 24.5 *
SOUTH PASS 9040 14.5 16.8 86 14.8 18.9 78
WINDY PEAK 7840 9.8 8.1 121 11.2 10.8 104
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Basin wide percent of average 86 89
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 9.9 10.7 93 15.4 16.1 96
DIVIDE PEAK 8800 21.6 20.1 107 20.8 21.0 99
OLD BATTLE 10000 -M 32.7 * -M 35.1 *
SANDSTONE RS 8150 12.4 14.6 85 18.0 19.0 95
WHISKEY PARK 8950 27.3 30.4 90 26.8 29.1 92
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Basin wide percent of average 94 95
UPPER GREEN RIVER
BIG SANDY OPENING 9100 12.0 14.8 81 11.2 13.7 82
BLIND BULL SUM 8650 23.8 28.4 84 17.4 22.7 77
EAST RIM DIVIDE 7930 10.8 13.4 81 10.6 12.3 86
ELKHART PARK G.S. 9400 13.4 13.7 98 12.9 13.6 95
GROS VENTRE SUMMIT 8775 13.1 14.4 91 12.0 13.2 91
KENDALL R.S. 7740 13.3 14.5 92 13.4 14.8 91
LOOMIS PARK 8240 18.3 17.4 105 16.4 17.8 92
NEW FORK LAKE 8340 10.7 11.3 95 -M 11.5 *
SNIDER BASIN 8250 13.5 14.7 92 13.5 16.4 82
SPRING CREEK DIVIDE 9000 26.0 27.1 96 23.8 27.0 88
TRIPLE PEAK 8500 25.0 25.3 99 26.7 25.3 106
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Basin wide percent of average 92 89
LOWER GREEN RIVER
HAMS FORK 7840 11.8 11.7 101 11.0 12.5 88
HEWINTA 9500 9.5 12.1 79 11.7 14.9 79
HICKERSON PARK 9150 6.5 7.8 83 8.3 8.1 102
HOLE-IN-ROCK 9150 7.3 7.2 101 8.8 7.6 116
INDIAN CREEK 9425 23.9 28.4 84 19.9 26.0 77
KELLEY R.S. 8180 13.7 17.1 80 14.6 20.8 70
STEEL CREEK PARK 10100 12.9 16.1 80 13.1 16.6 79
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Basin wide percent of average 85 82
UPPER BEAR RIVER
BUG LAKE 7950 15.9 21.3 75 15.8 19.7 80
HAYDEN FORK 9400 14.3 16.6 86 17.8 21.5 83
KELLEY R.S. 8180 13.7 17.1 80 14.6 20.8 70
LILY LAKE 9050 11.9 13.6 88 14.0 17.8 79
MONTE CRISTO 8960 15.2 30.2 50 20.6 26.0 79
SALT RIVER SUMMIT 7600 12.0 14.6 82 14.2 19.2 74
TRIAL LAKE 9960 14.3 25.5 56 16.0 25.5 63
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Basin wide percent of average 70 75
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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.