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: MAY 20 , 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 4.6 * -M 26.1 *
COTTONWOOD CREEK 7600 6.4 11.3 57 27.9 34.3 81
GRANITE CREEK 6770 .0 5.7 0 19.3 23.9 81
GRASSY LAKE 7265 -M 22.8 * -M 43.5 *
GROS VENTRE SUMMIT 8775 4.8 8.1 59 14.1 16.8 84
LEWIS LAKE DIVIDE 7860 -M 25.7 * -M 43.9 *
PHILLIPS BENCH 8200 -M 21.1 * -M 35.2 *
SALT RIVER SUMMIT 7600 .0 3.5 0 16.1 23.1 70
SNAKE RIVER STATION 6920 -M 4.0 * -M 27.3 *
SPRING CREEK DIVIDE 9000 21.0 21.8 96 26.6 32.0 83
THUMB DIVIDE 7980 4.2 7.4 57 21.4 23.7 90
TOGWOTEE PASS 9580 -M 25.8 * -M 31.3 *
TWO OCEAN PLATEAU 9360 36.7 29.1 126 31.6 34.7 91
WILLOW CREEK 8450 -M 22.1 * -M 40.7 *
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Basin wide percent of average 84 83
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 27.2 23.9 114 27.2 25.6 106
BLACK BEAR 8170 -M 33.4 * -M 48.6 *
CANYON 8090 -M 5.4 * -M 19.4 *
FISHER CREEK 9100 41.0 34.7 118 41.6 44.8 93
MADISON PLATEAU 7750 17.1 16.4 104 27.6 32.8 84
NORTHEAST ENTRANCE 7350 -M 2.4 * -M 16.5 *
PARKER PEAK 9400 26.0 22.4 116 25.1 21.8 115
SYLVAN LAKE 8420 -M 17.7 * -M 27.3 *
THUMB DIVIDE 7980 4.2 7.4 57 21.4 23.7 90
TWO OCEAN PLATEAU 9360 36.7 29.1 126 31.6 34.7 91
WHISKEY CREEK 6800 -M 7.3 * -M 26.1 *
WHITE MILL 8700 31.1 22.7 137 29.0 33.7 86
WOLVERINE 7650 .0 2.3 0 14.7 17.1 86
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Basin wide percent of average 115 93
WIND RIVER
BURROUGHS CREEK 8750 -M 8.3 * -M 21.3 *
COLD SPRINGS 9630 .2 2.7 7 13.6 15.9 86
DEER PARK 9700 11.9 14.5 82 22.3 29.4 76
HOBBS PARK 10100 12.1 14.8 82 17.3 19.4 89
LITTLE WARM 9370 -M 6.1 * -M 18.8 *
SOUTH PASS 9040 4.1 11.8 35 17.8 24.7 72
ST. LAWRENCE ALT 8620 .0 2.8 0 11.8 14.0 84
TOGWOTEE PASS 9580 -M 25.8 * -M 31.3 *
TOWNSEND CREEK 8700 .0 4.5 0 15.9 17.5 91
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Basin wide percent of average 55 82
BIGHORN BASIN
BALD MTN. 9380 20.8 21.1 99 21.4 23.8 90
BEAR TRAP MEADOW 8200 .1 .5 20* 12.2 12.9 95
BLACKWATER 9780 30.0 27.6 109 27.6 27.3 101
BONE SPRINGS DIV 9350 17.3 13.8 125 21.3 20.8 102
EVENING STAR 9200 32.6 30.8 106 38.6 32.7 118
GRAVE SPRINGS 8550 1.5 6.1 25 12.1 14.9 81
KIRWIN 9550 12.1 9.4 129 16.9 16.2 104
MARQUETTE 8760 -M 7.5 * -M 16.3 *
MIDDLE POWDER 7760 5.5 8.6 64 11.8 17.8 66
OWL CREEK 8975 .2 1.8 11 8.9 10.0 89
POWDER RIVER PASS 9480 7.4 6.4 116 16.7 18.1 92
SHELL CREEK 9580 16.7 14.6 114 18.0 19.1 94
SYLVAN LAKE 8420 -M 17.7 * -M 27.3 *
SYLVAN ROAD 7120 -M 1.9 * -M 22.2 *
TIMBER CREEK 7950 .9 1.7 53 12.5 12.9 97
YOUNTS PEAK 8350 14.3 12.9 111 19.4 20.8 93
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Basin wide percent of average 103 96
SHOSHONE RIVER
BLACKWATER 9780 30.0 27.6 109 27.6 27.3 101
EVENING STAR 9200 32.6 30.8 106 38.6 32.7 118
KIRWIN 9550 12.1 9.4 129 16.9 16.2 104
MARQUETTE 8760 -M 7.5 * -M 16.3 *
SYLVAN LAKE 8420 -M 17.7 * -M 27.3 *
SYLVAN ROAD 7120 -M 1.9 * -M 22.2 *
YOUNTS PEAK 8350 14.3 12.9 111 19.4 20.8 93
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Basin wide percent of average 110 106
POWDER-TONGUE
BEAR TRAP MEADOW 8200 .1 .5 20* 12.2 12.9 95
BIG GOOSE 7990 8.9 7.2 124 18.2 15.0 121
BONE SPRINGS DIV 9350 17.3 13.8 125 21.3 20.8 102
BURGESS JUNCTION 7880 11.5 8.0 144 18.7 17.3 108
CLOUD PEAK RESERVOIR 9860 16.8 12.7 132 19.3 19.9 97
DOME LAKE 8880 8.8 8.3 106 20.7 19.1 108
GRAVE SPRINGS 8550 1.5 6.1 25 12.1 14.9 81
HANSEN SAWMILL 8360 .3 1.6 19 14.5 12.9 112
MIDDLE POWDER 7760 5.5 8.6 64 11.8 17.8 66
POWDER RIVER PASS 9480 7.4 6.4 116 16.7 18.1 92
SUCKER CREEK 8880 12.7 8.3 153 22.1 19.9 111
TIE CREEK 6870 .1 .9 11 19.3 15.8 122
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Basin wide percent of average 110 101
BELLE FOURCHE
BLIND PARK 6890 .0 .1 0* 14.6 16.5 88
COLE CANYON 5910 .0 -M * 12.2 -M *
NORTH RAPID CREEK 6130 .0 .4 0* 12.9 13.0 99
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Basin wide percent of average 0* 93
UPPER N. PLATTE RIVER
COLUMBINE 9400 7.5 9.8 77 31.3 31.0 101
DIVIDE PEAK 8800 10.5 10.1 104 27.4 26.3 104
ELK RIVER 8700 1.1 5.7 19 25.3 24.8 102
JOE WRIGHT 10120 30.7 21.8 141 38.9 33.0 118
NORTH FRENCH CREEK 10100 36.6 30.5 120 38.6 32.5 119
OLD BATTLE 10000 -M 32.6 * -M 42.5 *
SAGE CREEK BASIN 7850 .0 5.8 0 16.6 15.2 109
SOUTH BRUSH CREEK 8400 4.4 5.1 86 23.8 22.2 107
TOWER 10500 50.4 48.9 103 55.1 48.1 115
WEBBER SPRINGS 9200 10.7 14.7 73 31.4 33.3 94
WILLOW CREEK PASS 9540 18.8 8.8 214 21.7 17.6 123
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Basin wide percent of average 106 109
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 16.4 19.7 83 27.6 29.5 94
CASPER MTN. 7900 4.9 9.5 52 16.7 22.3 75
DEADMAN HILL 10220 19.0 16.0 119 26.2 23.3 112
DEER PARK 9700 11.9 14.5 82 22.3 29.4 76
LAPRELE CREEK 8320 .0 2.8 0 16.3 18.7 87
RENO HILL 8400 9.0 7.8 115 20.7 23.0 90
ROACH 9700 13.8 11.2 123 25.5 24.9 102
SAND LAKE 10080 33.0 32.6 101 33.0 32.4 102
SOUTH PASS 9040 4.1 11.8 35 17.8 24.7 72
WINDY PEAK 7840 .2 1.2 17 16.5 15.7 105
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Basin wide percent of average 88 91
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .0 .4 0* 20.1 20.0 101
DIVIDE PEAK 8800 10.5 10.1 104 27.4 26.3 104
OLD BATTLE 10000 -M 32.6 * -M 42.5 *
SANDSTONE RS 8150 .3 2.7 11 24.5 23.7 103
WHISKEY PARK 8950 26.0 22.7 115 35.2 36.3 97
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Basin wide percent of average 103 101
UPPER GREEN RIVER
BIG SANDY OPENING 9100 3.0 6.8 44 14.6 17.6 83
BLIND BULL SUM 8650 -M 22.8 * -M 27.0 *
EAST RIM DIVIDE 7930 2.2 6.9 32 11.9 15.2 78
ELKHART PARK G.S. 9400 -M 7.6 * -M 17.8 *
GROS VENTRE SUMMIT 8775 4.8 8.1 59 14.1 16.8 84
KENDALL R.S. 7740 .0 2.6 0 15.0 17.8 84
LOOMIS PARK 8240 -M 7.5 * -M 21.5 *
NEW FORK LAKE 8340 .0 2.7 0 -M 14.9 *
SNIDER BASIN 8250 .0 5.4 0 15.1 19.7 77
SPRING CREEK DIVIDE 9000 21.0 21.8 96 26.6 32.0 83
TRIPLE PEAK 8500 -M 13.5 * -M 30.6 *
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Basin wide percent of average 57 82
LOWER GREEN RIVER
HAMS FORK 7840 .0 .8 0* 14.1 16.1 88
HEWINTA 9500 .0 3.4 0 16.1 19.3 83
HICKERSON PARK 9150 .0 1.5 0 12.5 11.7 107
HOLE-IN-ROCK 9150 .0 1.2 0 13.4 11.2 120
INDIAN CREEK 9425 19.0 21.1 90 23.6 31.3 75
KELLEY R.S. 8180 .9 6.8 13 16.3 25.2 65
STEEL CREEK PARK 10100 16.3 16.2 101 18.7 22.0 85
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Basin wide percent of average 71 84
UPPER BEAR RIVER
BUG LAKE 7950 3.3 8.5 39 20.4 24.1 85
HAYDEN FORK 9400 .6 5.6 11 22.2 27.2 82
KELLEY R.S. 8180 .9 6.8 13 16.3 25.2 65
LILY LAKE 9050 .0 4.9 0 18.7 22.9 82
MONTE CRISTO 8960 5.0 19.7 25 26.7 32.6 82
SALT RIVER SUMMIT 7600 .0 3.5 0 16.1 23.1 70
TRIAL LAKE 9960 10.2 20.6 50 22.9 31.8 72
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Basin wide percent of average 29 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.