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: MAY 18 , 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 -M 5.4 * -M 25.9 *
COTTONWOOD CREEK 7600 8.1 12.3 66 28.1 34.0 83
GRANITE CREEK 6770 -M 6.6 * -M 23.8 *
GRASSY LAKE 7265 -M 24.3 * -M 43.2 *
GROS VENTRE SUMMIT 8775 6.1 8.8 69 14.2 16.6 86
LEWIS LAKE DIVIDE 7860 25.6 27.0 95 35.7 43.7 82
PHILLIPS BENCH 8200 -M 22.3 * -M 35.0 *
SALT RIVER SUMMIT 7600 .0 4.0 0 16.1 23.0 70
SNAKE RIVER STATION 6920 .4 4.7 9 25.1 27.1 93
SPRING CREEK DIVIDE 9000 -M 23.0 * -M 31.8 *
THUMB DIVIDE 7980 5.3 8.3 64 21.5 23.5 91
TOGWOTEE PASS 9580 25.5 26.4 97 28.4 31.0 92
TWO OCEAN PLATEAU 9360 37.4 29.7 126 31.5 34.4 92
WILLOW CREEK 8450 18.7 23.4 80 40.7 40.4 101
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Basin wide percent of average 88 88
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 27.7 24.5 113 27.4 25.4 108
BLACK BEAR 8170 39.1 34.7 113 40.3 48.3 83
CANYON 8090 9.6 6.1 157 19.1 19.2 99
FISHER CREEK 9100 39.7 35.5 112 41.6 44.5 93
MADISON PLATEAU 7750 16.9 17.6 96 27.2 32.5 84
NORTHEAST ENTRANCE 7350 -M 2.8 * -M 16.3 *
PARKER PEAK 9400 -M 23.0 * 25.2 21.5 117
SYLVAN LAKE 8420 -M 18.7 * -M 27.1 *
THUMB DIVIDE 7980 5.3 8.3 64 21.5 23.5 91
TWO OCEAN PLATEAU 9360 37.4 29.7 126 31.5 34.4 92
WHISKEY CREEK 6800 -M 8.3 * -M 25.9 *
WHITE MILL 8700 30.8 23.5 131 29.1 33.4 87
WOLVERINE 7650 .0 2.6 0 14.5 16.9 86
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Basin wide percent of average 113 93
WIND RIVER
BURROUGHS CREEK 8750 -M 9.2 * -M 21.1 *
COLD SPRINGS 9630 .4 2.9 14 13.6 15.7 87
DEER PARK 9700 12.4 15.6 79 22.4 29.1 77
HOBBS PARK 10100 11.8 15.5 76 17.4 19.1 91
LITTLE WARM 9370 1.4 6.8 21 14.8 18.6 80
SOUTH PASS 9040 5.1 12.7 40 17.9 24.5 73
ST. LAWRENCE ALT 8620 .2 3.2 6 11.8 13.8 86
TOGWOTEE PASS 9580 25.5 26.4 97 28.4 31.0 92
TOWNSEND CREEK 8700 .4 5.0 8 15.6 17.3 90
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Basin wide percent of average 65 84
BIGHORN BASIN
BALD MTN. 9380 20.6 21.9 94 21.4 23.5 91
BEAR TRAP MEADOW 8200 .1 .6 17 12.4 12.7 98
BLACKWATER 9780 29.8 28.1 106 27.6 27.0 102
BONE SPRINGS DIV 9350 16.9 14.8 114 21.5 20.5 105
EVENING STAR 9200 32.2 31.5 102 38.5 32.4 119
GRAVE SPRINGS 8550 3.4 6.8 50 12.3 14.7 84
KIRWIN 9550 12.8 10.0 128 17.1 16.0 107
MARQUETTE 8760 16.1 8.1 199 20.7 16.1 129
MIDDLE POWDER 7760 6.1 9.6 64 11.7 17.6 66
OWL CREEK 8975 .2 2.0 10 9.0 9.8 92
POWDER RIVER PASS 9480 7.9 7.1 111 16.8 17.9 94
SHELL CREEK 9580 16.8 15.3 110 17.6 18.8 94
SYLVAN LAKE 8420 -M 18.7 * -M 27.1 *
SYLVAN ROAD 7120 1.4 2.2 64 21.5 22.0 98
TIMBER CREEK 7950 1.4 1.9 74 12.3 12.6 98
YOUNTS PEAK 8350 14.6 13.9 105 19.5 20.6 95
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Basin wide percent of average 104 99
SHOSHONE RIVER
BLACKWATER 9780 29.8 28.1 106 27.6 27.0 102
EVENING STAR 9200 32.2 31.5 102 38.5 32.4 119
KIRWIN 9550 12.8 10.0 128 17.1 16.0 107
MARQUETTE 8760 16.1 8.1 199 20.7 16.1 129
SYLVAN LAKE 8420 -M 18.7 * -M 27.1 *
SYLVAN ROAD 7120 1.4 2.2 64 21.5 22.0 98
YOUNTS PEAK 8350 14.6 13.9 105 19.5 20.6 95
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Basin wide percent of average 114 108
POWDER-TONGUE
BEAR TRAP MEADOW 8200 .1 .6 17 12.4 12.7 98
BIG GOOSE 7990 9.3 8.0 116 18.3 14.8 124
BONE SPRINGS DIV 9350 16.9 14.8 114 21.5 20.5 105
BURGESS JUNCTION 7880 11.9 8.9 134 18.7 17.1 109
CLOUD PEAK RESERVOIR 9860 16.9 13.5 125 19.4 19.6 99
DOME LAKE 8880 9.3 9.1 102 20.3 18.9 107
GRAVE SPRINGS 8550 3.4 6.8 50 12.3 14.7 84
HANSEN SAWMILL 8360 .4 1.8 22 14.5 12.7 114
MIDDLE POWDER 7760 6.1 9.6 64 11.7 17.6 66
POWDER RIVER PASS 9480 7.9 7.1 111 16.8 17.9 94
SUCKER CREEK 8880 13.0 9.0 144 22.0 19.6 112
TIE CREEK 6870 .3 1.1 27 19.3 15.5 125
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Basin wide percent of average 106 103
BELLE FOURCHE
BLIND PARK 6890 .3 .1 300* 14.6 16.2 90
COLE CANYON 5910 .2 -M * 12.5 -M *
NORTH RAPID CREEK 6130 .1 .5 20* 13.1 12.8 102
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Basin wide percent of average 67* 96
UPPER N. PLATTE RIVER
COLUMBINE 9400 9.9 11.1 89 31.5 30.8 102
DIVIDE PEAK 8800 13.2 11.2 118 27.3 26.1 105
ELK RIVER 8700 4.1 6.5 63 25.4 24.6 103
JOE WRIGHT 10120 31.9 22.6 141 38.9 32.7 119
NORTH FRENCH CREEK 10100 36.9 31.6 117 38.3 32.2 119
OLD BATTLE 10000 -M 33.8 * -M 42.3 *
SAGE CREEK BASIN 7850 .1 6.5 2 16.4 15.1 109
SOUTH BRUSH CREEK 8400 5.5 5.7 96 23.9 22.0 109
TOWER 10500 51.1 49.9 102 54.8 47.8 115
WEBBER SPRINGS 9200 11.5 16.1 71 31.2 33.1 94
WILLOW CREEK PASS 9540 20.0 9.8 204 21.8 17.4 125
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Basin wide percent of average 108 110
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 16.7 21.1 79 27.6 29.2 95
CASPER MTN. 7900 5.9 10.4 57 16.7 22.0 76
DEADMAN HILL 10220 19.6 16.8 117 26.2 23.0 114
DEER PARK 9700 12.4 15.6 79 22.4 29.1 77
LAPRELE CREEK 8320 .2 3.1 6 16.3 18.5 88
RENO HILL 8400 9.6 8.6 112 20.7 22.7 91
ROACH 9700 14.5 12.1 120 25.5 24.6 104
SAND LAKE 10080 33.0 33.8 98 30.9 32.0 97
SOUTH PASS 9040 5.1 12.7 40 17.9 24.5 73
WINDY PEAK 7840 .4 1.4 29 16.5 15.5 106
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Basin wide percent of average 87 92
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .2 .5 40* 20.6 19.9 104
DIVIDE PEAK 8800 13.2 11.2 118 27.3 26.1 105
OLD BATTLE 10000 -M 33.8 * -M 42.3 *
SANDSTONE RS 8150 .3 3.1 10 24.2 23.5 103
WHISKEY PARK 8950 27.6 24.2 114 35.1 36.0 98
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Basin wide percent of average 106 102
UPPER GREEN RIVER
BIG SANDY OPENING 9100 4.9 7.7 64 14.6 17.4 84
BLIND BULL SUM 8650 -M 23.6 * -M 26.8 *
EAST RIM DIVIDE 7930 2.9 7.8 37 12.0 15.1 79
ELKHART PARK G.S. 9400 6.9 8.3 83 15.0 17.6 85
GROS VENTRE SUMMIT 8775 6.1 8.8 69 14.2 16.6 86
KENDALL R.S. 7740 .0 3.0 0 15.1 17.7 85
LOOMIS PARK 8240 -M 8.4 * -M 21.3 *
NEW FORK LAKE 8340 .0 3.1 0 -M 14.8 *
SNIDER BASIN 8250 .0 6.3 0 15.1 19.5 77
SPRING CREEK DIVIDE 9000 -M 23.0 * -M 31.8 *
TRIPLE PEAK 8500 -M 14.9 * -M 30.4 *
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Basin wide percent of average 46 83
LOWER GREEN RIVER
HAMS FORK 7840 .2 .9 22* 14.1 16.0 88
HEWINTA 9500 .0 3.8 0 15.9 19.2 83
HICKERSON PARK 9150 .0 1.7 0 12.6 11.5 110
HOLE-IN-ROCK 9150 .0 1.4 0 13.9 11.1 125
INDIAN CREEK 9425 19.9 22.1 90 23.7 31.1 76
KELLEY R.S. 8180 2.6 7.7 34 16.4 25.0 66
STEEL CREEK PARK 10100 16.8 17.0 99 18.7 21.8 86
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Basin wide percent of average 72 85
UPPER BEAR RIVER
BUG LAKE 7950 5.3 9.4 56 20.4 23.9 85
HAYDEN FORK 9400 -M 6.3 * -M 27.0 *
KELLEY R.S. 8180 2.6 7.7 34 16.4 25.0 66
LILY LAKE 9050 .1 5.4 2 19.2 22.7 85
MONTE CRISTO 8960 6.8 20.9 33 26.7 32.3 83
SALT RIVER SUMMIT 7600 .0 4.0 0 16.1 23.0 70
TRIAL LAKE 9960 11.6 21.7 53 22.6 31.5 72
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Basin wide percent of average 38 77
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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.