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 WEDNESDAY: MAY 21 , 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 4.2 * -M 26.1 *
COTTONWOOD CREEK 7600 5.2 10.8 48 27.9 34.4 81
GRANITE CREEK 6770 -M 5.3 * -M 24.0 *
GRASSY LAKE 7265 -M 22.1 * -M 43.6 *
GROS VENTRE SUMMIT 8775 -M 7.7 * -M 16.8 *
LEWIS LAKE DIVIDE 7860 -M 25.1 * -M 44.1 *
PHILLIPS BENCH 8200 -M 20.5 * -M 35.4 *
SALT RIVER SUMMIT 7600 -M 3.2 * -M 23.2 *
SNAKE RIVER STATION 6920 .0 3.7 0 25.1 27.4 92
SPRING CREEK DIVIDE 9000 20.4 21.3 96 26.6 32.1 83
THUMB DIVIDE 7980 3.4 6.9 49 21.5 23.8 90
TOGWOTEE PASS 9580 -M 25.5 * -M 31.4 *
TWO OCEAN PLATEAU 9360 36.3 28.8 126 31.5 34.8 91
WILLOW CREEK 8450 -M 21.4 * -M 40.9 *
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Basin wide percent of average 91* 87*
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 -M 23.6 * -M 25.8 *
BLACK BEAR 8170 -M 32.8 * -M 48.7 *
CANYON 8090 -M 5.1 * -M 19.5 *
FISHER CREEK 9100 41.0 34.3 120 41.8 45.0 93
MADISON PLATEAU 7750 16.3 15.8 103 27.6 32.9 84
NORTHEAST ENTRANCE 7350 -M 2.3 * -M 16.6 *
PARKER PEAK 9400 25.2 22.1 114 25.3 21.9 116
SYLVAN LAKE 8420 -M 17.2 * -M 27.5 *
THUMB DIVIDE 7980 3.4 6.9 49 21.5 23.8 90
TWO OCEAN PLATEAU 9360 36.3 28.8 126 31.5 34.8 91
WHISKEY CREEK 6800 -M 6.8 * -M 26.2 *
WHITE MILL 8700 30.6 22.3 137 29.2 33.8 86
WOLVERINE 7650 .0 2.1 0 14.6 17.2 85
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Basin wide percent of average 115 91
WIND RIVER
BURROUGHS CREEK 8750 -M 7.9 * -M 21.4 *
COLD SPRINGS 9630 -M 2.5 * -M 16.0 *
DEER PARK 9700 11.3 14.0 81 22.5 29.5 76
HOBBS PARK 10100 10.9 14.4 76 17.8 19.5 91
LITTLE WARM 9370 -M 5.7 * -M 18.9 *
SOUTH PASS 9040 3.3 11.3 29 18.1 24.8 73
ST. LAWRENCE ALT 8620 .1 2.6 4 11.8 14.1 84
TOGWOTEE PASS 9580 -M 25.5 * -M 31.4 *
TOWNSEND CREEK 8700 .0 4.3 0 15.8 17.6 90
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Basin wide percent of average 55 82
BIGHORN BASIN
BALD MTN. 9380 20.8 20.8 100 21.6 23.9 90
BEAR TRAP MEADOW 8200 .0 .5 0* 12.5 13.0 96
BLACKWATER 9780 29.8 27.4 109 27.8 27.4 101
BONE SPRINGS DIV 9350 16.7 13.4 125 21.6 20.9 103
EVENING STAR 9200 31.9 30.5 105 38.7 32.8 118
GRAVE SPRINGS 8550 1.1 5.7 19 12.2 15.0 81
KIRWIN 9550 11.5 9.1 126 17.2 16.3 106
MARQUETTE 8760 -M 7.2 * -M 16.5 *
MIDDLE POWDER 7760 4.9 8.1 60 11.9 17.9 66
OWL CREEK 8975 -M 1.7 * -M 10.1 *
POWDER RIVER PASS 9480 6.7 6.1 110 16.9 18.3 92
SHELL CREEK 9580 16.3 14.2 115 18.0 19.2 94
SYLVAN LAKE 8420 -M 17.2 * -M 27.5 *
SYLVAN ROAD 7120 -M 1.7 * -M 22.3 *
TIMBER CREEK 7950 .6 1.6 37 12.5 13.0 96
YOUNTS PEAK 8350 -M 12.4 * -M 20.9 *
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Basin wide percent of average 102 97
SHOSHONE RIVER
BLACKWATER 9780 29.8 27.4 109 27.8 27.4 101
EVENING STAR 9200 31.9 30.5 105 38.7 32.8 118
KIRWIN 9550 11.5 9.1 126 17.2 16.3 106
MARQUETTE 8760 -M 7.2 * -M 16.5 *
SYLVAN LAKE 8420 -M 17.2 * -M 27.5 *
SYLVAN ROAD 7120 -M 1.7 * -M 22.3 *
YOUNTS PEAK 8350 -M 12.4 * -M 20.9 *
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Basin wide percent of average 109* 109*
POWDER-TONGUE
BEAR TRAP MEADOW 8200 .0 .5 0* 12.5 13.0 96
BIG GOOSE 7990 8.5 6.8 125 18.4 15.2 121
BONE SPRINGS DIV 9350 16.7 13.4 125 21.6 20.9 103
BURGESS JUNCTION 7880 11.4 7.5 152 18.9 17.4 109
CLOUD PEAK RESERVOIR 9860 16.6 12.3 135 19.6 20.1 98
DOME LAKE 8880 8.5 7.9 108 20.6 19.3 107
GRAVE SPRINGS 8550 1.1 5.7 19 12.2 15.0 81
HANSEN SAWMILL 8360 .3 1.5 20 14.5 13.0 112
MIDDLE POWDER 7760 4.9 8.1 60 11.9 17.9 66
POWDER RIVER PASS 9480 6.7 6.1 110 16.9 18.3 92
SUCKER CREEK 8880 12.6 7.9 159 22.5 20.0 112
TIE CREEK 6870 .1 .8 12 19.4 15.9 122
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Basin wide percent of average 111 101
BELLE FOURCHE
BLIND PARK 6890 .2 .1 200* 14.7 16.6 89
COLE CANYON 5910 .0 -M * 12.8 -M *
NORTH RAPID CREEK 6130 .0 .4 0* 13.0 13.1 99
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Basin wide percent of average 40* 93
UPPER N. PLATTE RIVER
COLUMBINE 9400 6.1 9.2 66 31.4 31.1 101
DIVIDE PEAK 8800 9.4 9.6 98 27.4 26.4 104
ELK RIVER 8700 .4 5.4 7 25.3 24.9 102
JOE WRIGHT 10120 29.5 21.4 138 39.0 33.1 118
NORTH FRENCH CREEK 10100 36.1 29.9 121 38.6 32.7 118
OLD BATTLE 10000 -M 32.0 * -M 42.7 *
SAGE CREEK BASIN 7850 .0 5.5 0 16.6 15.3 108
SOUTH BRUSH CREEK 8400 3.0 4.8 62 23.9 22.4 107
TOWER 10500 49.7 48.3 103 55.2 48.3 114
WEBBER SPRINGS 9200 9.4 14.0 67 31.6 33.4 95
WILLOW CREEK PASS 9540 18.2 8.4 217 21.8 17.7 123
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Basin wide percent of average 103 109
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 15.4 19.0 81 27.8 29.6 94
CASPER MTN. 7900 4.1 9.1 45 16.8 22.4 75
DEADMAN HILL 10220 18.8 15.6 121 26.2 23.4 112
DEER PARK 9700 11.3 14.0 81 22.5 29.5 76
LAPRELE CREEK 8320 .1 2.6 4 16.4 18.8 87
RENO HILL 8400 8.2 7.5 109 21.0 23.1 91
ROACH 9700 13.2 10.8 122 25.5 25.0 102
SAND LAKE 10080 32.3 32.1 101 32.3 32.5 99
SOUTH PASS 9040 3.3 11.3 29 18.1 24.8 73
WINDY PEAK 7840 .2 1.1 18 16.5 15.8 104
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Basin wide percent of average 87 91
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .0 .4 0* 20.2 20.1 100
DIVIDE PEAK 8800 9.4 9.6 98 27.4 26.4 104
OLD BATTLE 10000 -M 32.0 * -M 42.7 *
SANDSTONE RS 8150 .3 2.5 12 24.5 23.8 103
WHISKEY PARK 8950 -M 21.9 * -M 36.4 *
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Basin wide percent of average 78* 103
UPPER GREEN RIVER
BIG SANDY OPENING 9100 1.6 6.3 25 14.6 17.6 83
BLIND BULL SUM 8650 -M 22.4 * -M 27.1 *
EAST RIM DIVIDE 7930 1.7 6.5 26 11.9 15.3 78
ELKHART PARK G.S. 9400 -M 7.2 * -M 17.9 *
GROS VENTRE SUMMIT 8775 -M 7.7 * -M 16.8 *
KENDALL R.S. 7740 .0 2.4 0 15.2 17.9 85
LOOMIS PARK 8240 -M 7.1 * -M 21.6 *
NEW FORK LAKE 8340 .0 2.5 0 -M 15.0 *
SNIDER BASIN 8250 .0 5.0 0 15.1 19.7 77
SPRING CREEK DIVIDE 9000 20.4 21.3 96 26.6 32.1 83
TRIPLE PEAK 8500 7.9 12.8 62 30.7 30.7 100
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Basin wide percent of average 56 86
LOWER GREEN RIVER
HAMS FORK 7840 .0 .7 0* 14.1 16.2 87
HEWINTA 9500 -M 3.1 * -M 19.4 *
HICKERSON PARK 9150 .0 1.4 0 12.4 11.7 106
HOLE-IN-ROCK 9150 .0 1.1 0 13.3 11.3 118
INDIAN CREEK 9425 18.0 20.5 88 23.7 31.4 75
KELLEY R.S. 8180 .5 6.4 8 16.4 25.3 65
STEEL CREEK PARK 10100 16.0 15.9 101 18.7 22.1 85
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Basin wide percent of average 75 84
UPPER BEAR RIVER
BUG LAKE 7950 1.9 8.0 24 20.4 24.1 85
HAYDEN FORK 9400 .6 5.2 12 22.2 27.3 81
KELLEY R.S. 8180 .5 6.4 8 16.4 25.3 65
LILY LAKE 9050 .0 4.6 0 18.7 23.0 81
MONTE CRISTO 8960 4.2 19.1 22 26.8 32.7 82
SALT RIVER SUMMIT 7600 -M 3.2 * -M 23.2 *
TRIAL LAKE 9960 9.1 20.1 45 22.9 31.9 72
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Basin wide percent of average 26 78
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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.