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: MAY 22 , 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 .0 3.8 0 25.4 26.2 97
COTTONWOOD CREEK 7600 4.1 10.3 40 27.9 34.5 81
GRANITE CREEK 6770 .1 4.9 2 19.4 24.1 80
GRASSY LAKE 7265 18.2 21.4 85 39.5 43.7 90
GROS VENTRE SUMMIT 8775 3.2 7.3 44 14.2 16.9 84
LEWIS LAKE DIVIDE 7860 22.3 24.4 91 35.9 44.2 81
PHILLIPS BENCH 8200 -M 19.9 * -M 35.5 *
SALT RIVER SUMMIT 7600 .0 2.9 0 16.1 23.3 69
SNAKE RIVER STATION 6920 .1 3.4 3 25.1 27.5 91
SPRING CREEK DIVIDE 9000 19.6 20.7 95 26.6 32.2 83
THUMB DIVIDE 7980 2.4 6.5 37 21.5 23.9 90
TOGWOTEE PASS 9580 24.8 25.1 99 28.3 31.5 90
TWO OCEAN PLATEAU 9360 35.7 28.4 126 31.6 34.9 91
WILLOW CREEK 8450 15.1 20.8 73 40.7 41.0 99
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Basin wide percent of average 81 87
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 27.5 23.3 118 27.6 25.9 107
BLACK BEAR 8170 38.1 32.2 118 40.7 48.8 83
CANYON 8090 8.0 4.7 170 19.3 19.6 98
FISHER CREEK 9100 40.1 33.9 118 41.9 45.2 93
MADISON PLATEAU 7750 15.7 15.2 103 27.7 33.0 84
NORTHEAST ENTRANCE 7350 .3 2.1 14 17.1 16.7 102
PARKER PEAK 9400 24.8 21.7 114 25.4 22.0 115
SYLVAN LAKE 8420 19.6 16.6 118 29.9 27.6 108
THUMB DIVIDE 7980 2.4 6.5 37 21.5 23.9 90
TWO OCEAN PLATEAU 9360 35.7 28.4 126 31.6 34.9 91
WHISKEY CREEK 6800 3.7 6.3 59 20.0 26.3 76
WHITE MILL 8700 30.2 21.9 138 29.4 33.9 87
WOLVERINE 7650 .0 1.9 0 15.6 17.3 90
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Basin wide percent of average 115 93
WIND RIVER
BURROUGHS CREEK 8750 11.8 7.5 157 22.6 21.5 105
COLD SPRINGS 9630 .3 2.4 12 13.5 16.1 84
DEER PARK 9700 10.4 13.4 78 22.5 29.6 76
HOBBS PARK 10100 9.9 14.0 71 17.9 19.7 91
LITTLE WARM 9370 .4 5.4 7 14.8 19.0 78
SOUTH PASS 9040 1.9 10.9 17 18.2 24.9 73
ST. LAWRENCE ALT 8620 .2 2.5 8 11.8 14.2 83
TOGWOTEE PASS 9580 24.8 25.1 99 28.3 31.5 90
TOWNSEND CREEK 8700 .0 4.1 0 15.6 17.7 88
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Basin wide percent of average 70 85
BIGHORN BASIN
BALD MTN. 9380 20.3 20.4 100 21.7 24.0 90
BEAR TRAP MEADOW 8200 .1 .4 25* 12.7 13.1 97
BLACKWATER 9780 29.8 27.1 110 27.9 27.5 101
BONE SPRINGS DIV 9350 16.4 12.9 127 21.8 21.0 104
EVENING STAR 9200 31.0 30.1 103 38.7 32.9 118
GRAVE SPRINGS 8550 .7 5.4 13 12.4 15.1 82
KIRWIN 9550 10.8 8.7 124 17.4 16.4 106
MARQUETTE 8760 -M 7.0 * -M 16.6 *
MIDDLE POWDER 7760 3.8 7.6 50 12.1 18.0 67
OWL CREEK 8975 .3 1.6 19 9.0 10.2 88
POWDER RIVER PASS 9480 6.1 5.7 107 17.0 18.4 92
SHELL CREEK 9580 15.8 13.9 114 18.0 19.3 93
SYLVAN LAKE 8420 19.6 16.6 118 29.9 27.6 108
SYLVAN ROAD 7120 .1 1.6 6 21.6 22.4 96
TIMBER CREEK 7950 .3 1.5 20 12.4 13.1 95
YOUNTS PEAK 8350 13.2 11.9 111 19.6 21.0 93
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Basin wide percent of average 102 97
SHOSHONE RIVER
BLACKWATER 9780 29.8 27.1 110 27.9 27.5 101
EVENING STAR 9200 31.0 30.1 103 38.7 32.9 118
KIRWIN 9550 10.8 8.7 124 17.4 16.4 106
MARQUETTE 8760 -M 7.0 * -M 16.6 *
SYLVAN LAKE 8420 19.6 16.6 118 29.9 27.6 108
SYLVAN ROAD 7120 .1 1.6 6 21.6 22.4 96
YOUNTS PEAK 8350 13.2 11.9 111 19.6 21.0 93
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Basin wide percent of average 109 105
POWDER-TONGUE
BEAR TRAP MEADOW 8200 .1 .4 25* 12.7 13.1 97
BIG GOOSE 7990 8.0 6.5 123 18.5 15.3 121
BONE SPRINGS DIV 9350 16.4 12.9 127 21.8 21.0 104
BURGESS JUNCTION 7880 11.2 7.1 158 19.1 17.5 109
CLOUD PEAK RESERVOIR 9860 16.3 11.9 137 19.7 20.2 98
DOME LAKE 8880 8.3 7.4 112 20.6 19.4 106
GRAVE SPRINGS 8550 .7 5.4 13 12.4 15.1 82
HANSEN SAWMILL 8360 .3 1.4 21 14.6 13.1 111
MIDDLE POWDER 7760 3.8 7.6 50 12.1 18.0 67
POWDER RIVER PASS 9480 6.1 5.7 107 17.0 18.4 92
SUCKER CREEK 8880 12.1 7.5 161 22.7 20.2 112
TIE CREEK 6870 .2 .8 25 19.5 16.0 122
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Basin wide percent of average 112 102
BELLE FOURCHE
BLIND PARK 6890 .4 .1 400* 14.8 16.7 89
COLE CANYON 5910 .1 -M * 13.0 -M *
NORTH RAPID CREEK 6130 .1 .4 25* 13.1 13.2 99
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Basin wide percent of average 100* 93
UPPER N. PLATTE RIVER
COLUMBINE 9400 4.5 8.5 53 31.5 31.2 101
DIVIDE PEAK 8800 7.8 9.1 86 27.5 26.5 104
ELK RIVER 8700 .5 5.0 10 25.3 25.0 101
JOE WRIGHT 10120 28.1 21.0 134 39.0 33.3 117
NORTH FRENCH CREEK 10100 34.9 29.4 119 38.6 32.8 118
OLD BATTLE 10000 -M 31.4 * -M 42.8 *
SAGE CREEK BASIN 7850 .0 5.2 0 16.6 15.3 108
SOUTH BRUSH CREEK 8400 1.8 4.5 40 24.0 22.5 107
TOWER 10500 48.7 47.8 102 55.3 48.4 114
WEBBER SPRINGS 9200 7.7 13.3 58 31.7 33.5 95
WILLOW CREEK PASS 9540 17.4 7.9 220 21.8 17.8 122
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Basin wide percent of average 100 109
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 14.5 18.4 79 27.9 29.8 94
CASPER MTN. 7900 2.8 8.6 33 16.9 22.5 75
DEADMAN HILL 10220 18.4 15.2 121 26.2 23.5 111
DEER PARK 9700 10.4 13.4 78 22.5 29.6 76
LAPRELE CREEK 8320 -M 2.4 * 17.0 18.9 90
RENO HILL 8400 7.0 7.1 99 21.2 23.2 91
ROACH 9700 12.2 10.3 118 25.5 25.1 102
SAND LAKE 10080 31.6 31.5 100 32.0 32.7 98
SOUTH PASS 9040 1.9 10.9 17 18.2 24.9 73
WINDY PEAK 7840 .3 1.0 30 16.6 15.9 104
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Basin wide percent of average 85 91
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .1 .4 25* 20.4 20.2 101
DIVIDE PEAK 8800 7.8 9.1 86 27.5 26.5 104
OLD BATTLE 10000 -M 31.4 * -M 42.8 *
SANDSTONE RS 8150 .4 2.2 18 24.5 23.9 103
WHISKEY PARK 8950 23.5 21.2 111 35.2 36.5 96
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Basin wide percent of average 97 100
UPPER GREEN RIVER
BIG SANDY OPENING 9100 .6 5.9 10 14.6 17.7 82
BLIND BULL SUM 8650 22.0 22.0 100 20.3 27.2 75
EAST RIM DIVIDE 7930 .9 6.0 15 11.8 15.4 77
ELKHART PARK G.S. 9400 3.6 6.9 52 15.1 18.0 84
GROS VENTRE SUMMIT 8775 3.2 7.3 44 14.2 16.9 84
KENDALL R.S. 7740 .0 2.2 0 15.4 18.0 86
LOOMIS PARK 8240 .9 6.7 13 19.1 21.7 88
NEW FORK LAKE 8340 .0 2.2 0 -M 15.1 *
SNIDER BASIN 8250 .0 4.5 0 15.1 19.8 76
SPRING CREEK DIVIDE 9000 19.6 20.7 95 26.6 32.2 83
TRIPLE PEAK 8500 6.6 12.0 55 30.7 30.8 100
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Basin wide percent of average 60 84
LOWER GREEN RIVER
HAMS FORK 7840 .1 .6 17* 14.2 16.3 87
HEWINTA 9500 .0 2.9 0 16.1 19.5 83
HICKERSON PARK 9150 .0 1.2 0 12.3 11.8 104
HOLE-IN-ROCK 9150 .0 1.0 0 13.3 11.4 117
INDIAN CREEK 9425 17.0 20.0 85 23.7 31.5 75
KELLEY R.S. 8180 .4 5.9 7 16.4 25.4 65
STEEL CREEK PARK 10100 15.5 15.5 100 18.8 22.2 85
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Basin wide percent of average 70 83
UPPER BEAR RIVER
BUG LAKE 7950 .4 7.5 5 20.4 24.2 84
HAYDEN FORK 9400 .6 4.9 12 22.1 27.4 81
KELLEY R.S. 8180 .4 5.9 7 16.4 25.4 65
LILY LAKE 9050 .0 4.3 0 18.7 23.1 81
MONTE CRISTO 8960 3.0 18.5 16 26.9 32.8 82
SALT RIVER SUMMIT 7600 .0 2.9 0 16.1 23.3 69
TRIAL LAKE 9960 7.7 19.6 39 22.9 32.0 72
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Basin wide percent of average 19 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.