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 8 , 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 7.3 9.4 78 24.5 25.0 98
COTTONWOOD CREEK 7600 14.6 16.9 86 27.6 32.8 84
GRANITE CREEK 6770 3.2 10.3 31 18.5 23.0 80
GRASSY LAKE 7265 30.3 29.9 101 38.9 41.8 93
GROS VENTRE SUMMIT 8775 9.1 11.6 78 13.2 15.8 84
LEWIS LAKE DIVIDE 7860 32.6 31.8 103 34.9 42.5 82
PHILLIPS BENCH 8200 -M 26.8 * -M 33.9 *
SALT RIVER SUMMIT 7600 2.4 7.8 31 15.4 22.2 69
SNAKE RIVER STATION 6920 4.2 8.9 47 24.6 26.2 94
SPRING CREEK DIVIDE 9000 24.5 26.6 92 25.6 30.9 83
THUMB DIVIDE 7980 12.0 12.3 98 20.8 22.6 92
TOGWOTEE PASS 9580 25.6 27.6 93 27.2 29.8 91
TWO OCEAN PLATEAU 9360 37.3 31.2 120 30.3 33.0 92
WILLOW CREEK 8450 24.1 28.0 86 39.3 38.8 101
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Basin wide percent of average 90 89
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 30.4 25.7 118 26.7 24.3 110
BLACK BEAR 8170 41.3 38.2 108 39.7 46.8 85
CANYON 8090 12.9 9.2 140 18.6 18.3 102
FISHER CREEK 9100 41.5 37.2 112 39.7 43.0 92
MADISON PLATEAU 7750 22.2 21.9 101 26.8 31.3 86
NORTHEAST ENTRANCE 7350 3.1 5.2 60 16.1 15.4 105
PARKER PEAK 9400 29.6 24.2 122 24.7 20.3 122
SYLVAN LAKE 8420 23.1 22.1 105 29.0 25.7 113
THUMB DIVIDE 7980 12.0 12.3 98 20.8 22.6 92
TWO OCEAN PLATEAU 9360 37.3 31.2 120 30.3 33.0 92
WHISKEY CREEK 6800 11.2 12.5 90 21.3 24.9 86
WHITE MILL 8700 31.0 25.5 122 27.8 32.1 87
WOLVERINE 7650 1.2 5.2 23 14.5 15.9 91
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Basin wide percent of average 110 95
WIND RIVER
BURROUGHS CREEK 8750 16.2 12.0 135 21.2 20.0 106
COLD SPRINGS 9630 .8 4.0 20 11.9 14.6 82
DEER PARK 9700 12.7 17.9 71 20.2 27.9 72
HOBBS PARK 10100 12.1 17.4 70 15.6 17.8 88
LITTLE WARM 9370 4.5 9.4 48 13.4 17.5 77
SOUTH PASS 9040 8.0 16.1 50 16.2 23.4 69
ST. LAWRENCE ALT 8620 .5 4.9 10 10.2 12.8 80
TOGWOTEE PASS 9580 25.6 27.6 93 27.2 29.8 91
TOWNSEND CREEK 8700 2.2 7.4 30 13.8 16.2 85
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Basin wide percent of average 71 83
BIGHORN BASIN
BALD MTN. 9380 20.8 23.3 89 20.7 22.2 93
BEAR TRAP MEADOW 8200 1.4 1.6 87 11.3 11.6 97
BLACKWATER 9780 30.0 28.8 104 26.3 25.6 103
BONE SPRINGS DIV 9350 18.3 17.2 106 20.1 19.2 105
EVENING STAR 9200 33.6 32.9 102 37.2 30.9 120
GRAVE SPRINGS 8550 5.8 9.5 61 11.2 13.8 81
KIRWIN 9550 13.8 12.0 115 15.6 14.9 105
MARQUETTE 8760 14.8 10.1 147 17.8 14.7 121
MIDDLE POWDER 7760 8.4 12.7 66 10.5 16.5 64
OWL CREEK 8975 .8 3.1 26 8.3 8.9 93
POWDER RIVER PASS 9480 9.3 9.4 99 16.0 16.7 96
SHELL CREEK 9580 16.7 16.6 101 17.1 17.6 97
SYLVAN LAKE 8420 23.1 22.1 105 29.0 25.7 113
SYLVAN ROAD 7120 8.7 5.4 161 20.8 21.1 99
TIMBER CREEK 7950 2.9 3.5 83 10.5 11.4 92
YOUNTS PEAK 8350 16.3 16.8 97 18.4 19.5 94
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Basin wide percent of average 100 100
SHOSHONE RIVER
BLACKWATER 9780 30.0 28.8 104 26.3 25.6 103
EVENING STAR 9200 33.6 32.9 102 37.2 30.9 120
KIRWIN 9550 13.8 12.0 115 15.6 14.9 105
MARQUETTE 8760 14.8 10.1 147 17.8 14.7 121
SYLVAN LAKE 8420 23.1 22.1 105 29.0 25.7 113
SYLVAN ROAD 7120 8.7 5.4 161 20.8 21.1 99
YOUNTS PEAK 8350 16.3 16.8 97 18.4 19.5 94
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Basin wide percent of average 110 108
POWDER-TONGUE
BEAR TRAP MEADOW 8200 1.4 1.6 87 11.3 11.6 97
BIG GOOSE 7990 11.1 10.3 108 16.9 13.7 123
BONE SPRINGS DIV 9350 18.3 17.2 106 20.1 19.2 105
BURGESS JUNCTION 7880 13.3 11.8 113 17.3 16.1 107
CLOUD PEAK RESERVOIR 9860 17.2 15.5 111 18.4 18.1 102
DOME LAKE 8880 11.8 11.9 99 19.1 17.7 108
GRAVE SPRINGS 8550 5.8 9.5 61 11.2 13.8 81
HANSEN SAWMILL 8360 2.6 3.6 72 13.6 11.7 116
MIDDLE POWDER 7760 8.4 12.7 66 10.5 16.5 64
POWDER RIVER PASS 9480 9.3 9.4 99 16.0 16.7 96
SUCKER CREEK 8880 14.3 11.6 123 20.2 18.3 110
TIE CREEK 6870 2.9 2.6 112 17.5 14.3 122
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Basin wide percent of average 99 102
BELLE FOURCHE
BLIND PARK 6890 .0 2.0 0 13.5 15.0 90
COLE CANYON 5910 .1 -M * 11.4 -M *
NORTH RAPID CREEK 6130 .0 2.2 0 11.6 12.0 97
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Basin wide percent of average 0 93
UPPER N. PLATTE RIVER
COLUMBINE 9400 17.7 17.0 104 30.0 29.9 100
DIVIDE PEAK 8800 18.7 16.1 116 26.1 25.0 104
ELK RIVER 8700 11.8 11.3 104 24.0 23.7 101
JOE WRIGHT 10120 30.7 24.5 125 36.2 31.2 116
NORTH FRENCH CREEK 10100 36.5 33.9 108 36.0 30.7 117
OLD BATTLE 10000 35.8 36.2 99 39.7 40.9 97
SAGE CREEK BASIN 7850 .2 9.3 2 15.3 14.5 106
SOUTH BRUSH CREEK 8400 9.8 8.8 111 22.2 20.9 106
TOWER 10500 51.9 51.9 100 52.3 46.2 113
WEBBER SPRINGS 9200 16.6 21.6 77 29.8 31.9 93
WILLOW CREEK PASS 9540 21.1 12.7 166 19.8 16.4 121
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Basin wide percent of average 103 106
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 18.9 25.6 74 25.5 27.9 91
CASPER MTN. 7900 10.8 14.4 75 15.7 20.5 77
DEADMAN HILL 10220 19.7 18.9 104 24.0 21.8 110
DEER PARK 9700 12.7 17.9 71 20.2 27.9 72
LAPRELE CREEK 8320 5.2 5.3 98 15.8 17.3 91
RENO HILL 8400 13.7 12.2 112 19.5 21.2 92
ROACH 9700 17.4 15.9 109 23.9 23.3 103
SAND LAKE 10080 32.3 36.2 89 28.3 30.4 93
SOUTH PASS 9040 8.0 16.1 50 16.2 23.4 69
WINDY PEAK 7840 6.0 3.3 182 16.0 14.3 112
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Basin wide percent of average 87 90
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .2 2.6 8 19.5 19.1 102
DIVIDE PEAK 8800 18.7 16.1 116 26.1 25.0 104
OLD BATTLE 10000 35.8 36.2 99 39.7 40.9 97
SANDSTONE RS 8150 3.9 6.7 58 23.2 22.6 103
WHISKEY PARK 8950 30.1 28.5 106 33.4 34.7 96
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Basin wide percent of average 98 100
UPPER GREEN RIVER
BIG SANDY OPENING 9100 7.6 11.2 68 13.4 16.5 81
BLIND BULL SUM 8650 22.6 26.4 86 19.0 25.9 73
EAST RIM DIVIDE 7930 6.6 11.1 59 11.4 14.4 79
ELKHART PARK G.S. 9400 -M 11.1 * -M 16.7 *
GROS VENTRE SUMMIT 8775 9.1 11.6 78 13.2 15.8 84
KENDALL R.S. 7740 .0 6.8 0 14.4 17.1 84
LOOMIS PARK 8240 6.9 12.0 58 17.9 20.5 87
NEW FORK LAKE 8340 3.1 6.1 51 -M 14.0 *
SNIDER BASIN 8250 4.6 10.2 45 14.4 18.9 76
SPRING CREEK DIVIDE 9000 24.5 26.6 92 25.6 30.9 83
TRIPLE PEAK 8500 15.7 20.4 77 29.3 29.3 100
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Basin wide percent of average 71 84
LOWER GREEN RIVER
HAMS FORK 7840 .5 3.5 14 12.5 15.2 82
HEWINTA 9500 3.7 6.9 54 14.5 18.4 79
HICKERSON PARK 9150 .0 3.9 0 9.8 10.7 92
HOLE-IN-ROCK 9150 .6 3.2 19 10.9 10.3 106
INDIAN CREEK 9425 21.7 26.0 83 22.0 30.2 73
KELLEY R.S. 8180 8.0 11.6 69 15.9 24.2 66
STEEL CREEK PARK 10100 16.9 18.4 92 16.9 20.9 81
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Basin wide percent of average 70 79
UPPER BEAR RIVER
BUG LAKE 7950 10.3 14.4 72 18.5 23.0 80
HAYDEN FORK 9400 4.6 10.2 45 21.7 25.9 84
KELLEY R.S. 8180 8.0 11.6 69 15.9 24.2 66
LILY LAKE 9050 2.7 8.7 31 17.9 21.8 82
MONTE CRISTO 8960 10.2 25.5 40 24.6 31.1 79
SALT RIVER SUMMIT 7600 2.4 7.8 31 15.4 22.2 69
TRIAL LAKE 9960 13.7 24.9 55 20.8 30.3 69
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Basin wide percent of average 50 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.