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 7 , 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 7.8 9.8 80 24.4 24.9 98
COTTONWOOD CREEK 7600 14.6 17.3 84 27.5 32.7 84
GRANITE CREEK 6770 3.6 10.7 34 18.4 22.9 80
GRASSY LAKE 7265 30.4 30.4 100 38.9 41.7 93
GROS VENTRE SUMMIT 8775 9.1 11.8 77 13.0 15.8 82
LEWIS LAKE DIVIDE 7860 32.8 32.2 102 34.9 42.3 83
PHILLIPS BENCH 8200 -M 27.1 * -M 33.8 *
SALT RIVER SUMMIT 7600 2.8 8.2 34 15.4 22.1 70
SNAKE RIVER STATION 6920 4.6 9.4 49 24.6 26.1 94
SPRING CREEK DIVIDE 9000 24.4 26.9 91 25.5 30.8 83
THUMB DIVIDE 7980 12.2 12.7 96 20.7 22.5 92
TOGWOTEE PASS 9580 25.3 27.7 91 26.8 29.7 90
TWO OCEAN PLATEAU 9360 37.2 31.3 119 30.3 32.9 92
WILLOW CREEK 8450 24.0 28.3 85 39.2 38.6 102
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Basin wide percent of average 89 89
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 30.4 25.7 118 26.5 24.2 110
BLACK BEAR 8170 -M 38.4 * -M 46.7 *
CANYON 8090 13.1 9.5 138 18.6 18.2 102
FISHER CREEK 9100 41.1 37.3 110 39.2 42.8 92
MADISON PLATEAU 7750 22.3 22.2 100 26.8 31.2 86
NORTHEAST ENTRANCE 7350 3.7 5.5 67 16.1 15.3 105
PARKER PEAK 9400 29.6 24.3 122 24.5 20.2 121
SYLVAN LAKE 8420 23.1 22.3 104 28.9 25.5 113
THUMB DIVIDE 7980 12.2 12.7 96 20.7 22.5 92
TWO OCEAN PLATEAU 9360 37.2 31.3 119 30.3 32.9 92
WHISKEY CREEK 6800 11.4 12.9 88 21.2 24.8 85
WHITE MILL 8700 30.9 25.7 120 27.7 32.0 87
WOLVERINE 7650 1.5 5.5 27 14.3 15.8 91
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Basin wide percent of average 109 97
WIND RIVER
BURROUGHS CREEK 8750 16.2 12.2 133 21.0 19.9 106
COLD SPRINGS 9630 .4 4.2 10 11.6 14.5 80
DEER PARK 9700 12.7 18.0 71 20.0 27.8 72
HOBBS PARK 10100 12.8 17.4 74 15.3 17.7 86
LITTLE WARM 9370 4.9 9.7 51 13.1 17.4 75
SOUTH PASS 9040 8.7 16.3 53 16.1 23.3 69
ST. LAWRENCE ALT 8620 .1 5.1 2 9.9 12.7 78
TOGWOTEE PASS 9580 25.3 27.7 91 26.8 29.7 90
TOWNSEND CREEK 8700 2.3 7.6 30 13.6 16.1 84
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Basin wide percent of average 71 82
BIGHORN BASIN
BALD MTN. 9380 20.8 23.3 89 20.5 22.1 93
BEAR TRAP MEADOW 8200 1.6 1.7 94 11.3 11.5 98
BLACKWATER 9780 29.8 28.8 103 26.0 25.5 102
BONE SPRINGS DIV 9350 18.3 17.4 105 19.8 19.1 104
EVENING STAR 9200 33.6 33.0 102 37.1 30.8 120
GRAVE SPRINGS 8550 5.7 9.7 59 11.3 13.7 82
KIRWIN 9550 13.7 12.1 113 15.4 14.8 104
MARQUETTE 8760 14.5 10.3 141 17.5 14.5 121
MIDDLE POWDER 7760 8.5 12.9 66 10.4 16.4 63
OWL CREEK 8975 .2 3.3 6 7.8 8.8 89
POWDER RIVER PASS 9480 9.4 9.6 98 15.8 16.5 96
SHELL CREEK 9580 16.7 16.6 101 17.1 17.5 98
SYLVAN LAKE 8420 23.1 22.3 104 28.9 25.5 113
SYLVAN ROAD 7120 8.8 5.8 152 20.7 21.0 99
TIMBER CREEK 7950 2.8 3.7 76 10.0 11.3 88
YOUNTS PEAK 8350 16.2 16.9 96 18.2 19.4 94
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Basin wide percent of average 98 100
SHOSHONE RIVER
BLACKWATER 9780 29.8 28.8 103 26.0 25.5 102
EVENING STAR 9200 33.6 33.0 102 37.1 30.8 120
KIRWIN 9550 13.7 12.1 113 15.4 14.8 104
MARQUETTE 8760 14.5 10.3 141 17.5 14.5 121
SYLVAN LAKE 8420 23.1 22.3 104 28.9 25.5 113
SYLVAN ROAD 7120 8.8 5.8 152 20.7 21.0 99
YOUNTS PEAK 8350 16.2 16.9 96 18.2 19.4 94
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Basin wide percent of average 108 108
POWDER-TONGUE
BEAR TRAP MEADOW 8200 1.6 1.7 94 11.3 11.5 98
BIG GOOSE 7990 10.8 10.5 103 16.5 13.6 121
BONE SPRINGS DIV 9350 18.3 17.4 105 19.8 19.1 104
BURGESS JUNCTION 7880 13.3 12.0 111 17.1 16.0 107
CLOUD PEAK RESERVOIR 9860 16.6 15.6 106 17.8 18.0 99
DOME LAKE 8880 11.7 12.2 96 19.0 17.5 109
GRAVE SPRINGS 8550 5.7 9.7 59 11.3 13.7 82
HANSEN SAWMILL 8360 2.1 3.7 57 12.9 11.6 111
MIDDLE POWDER 7760 8.5 12.9 66 10.4 16.4 63
POWDER RIVER PASS 9480 9.4 9.6 98 15.8 16.5 96
SUCKER CREEK 8880 14.5 11.9 122 19.9 18.2 109
TIE CREEK 6870 2.8 2.8 100 17.3 14.2 122
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Basin wide percent of average 96 102
BELLE FOURCHE
BLIND PARK 6890 .0 2.3 0 13.4 14.9 90
COLE CANYON 5910 .0 -M * 11.0 -M *
NORTH RAPID CREEK 6130 .0 2.4 0 11.5 11.9 97
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Basin wide percent of average 0 93
UPPER N. PLATTE RIVER
COLUMBINE 9400 17.7 17.6 101 29.8 29.8 100
DIVIDE PEAK 8800 18.5 16.5 112 25.7 24.9 103
ELK RIVER 8700 12.5 11.8 106 23.8 23.6 101
JOE WRIGHT 10120 30.6 24.5 125 36.1 31.0 116
NORTH FRENCH CREEK 10100 36.3 33.9 107 35.8 30.6 117
OLD BATTLE 10000 35.5 36.3 98 39.3 40.7 97
SAGE CREEK BASIN 7850 .0 9.6 0 14.9 14.4 103
SOUTH BRUSH CREEK 8400 9.9 9.1 109 22.2 20.8 107
TOWER 10500 51.6 51.9 99 51.9 46.0 113
WEBBER SPRINGS 9200 16.9 22.1 76 29.4 31.8 92
WILLOW CREEK PASS 9540 21.3 12.9 165 19.7 16.3 121
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Basin wide percent of average 102 106
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 19.1 26.0 73 25.3 27.8 91
CASPER MTN. 7900 10.5 14.8 71 15.3 20.4 75
DEADMAN HILL 10220 19.7 19.0 104 23.8 21.7 110
DEER PARK 9700 12.7 18.0 71 20.0 27.8 72
LAPRELE CREEK 8320 5.8 5.6 104 15.7 17.2 91
RENO HILL 8400 13.7 12.6 109 19.1 21.1 91
ROACH 9700 17.7 16.3 109 23.8 23.2 103
SAND LAKE 10080 32.2 36.4 88 28.4 30.3 94
SOUTH PASS 9040 8.7 16.3 53 16.1 23.3 69
WINDY PEAK 7840 6.5 3.5 186 15.9 14.2 112
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Basin wide percent of average 87 90
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .1 2.9 3 18.9 19.0 99
DIVIDE PEAK 8800 18.5 16.5 112 25.7 24.9 103
OLD BATTLE 10000 35.5 36.3 98 39.3 40.7 97
SANDSTONE RS 8150 3.8 7.1 54 22.5 22.5 100
WHISKEY PARK 8950 29.7 28.8 103 33.1 34.6 96
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Basin wide percent of average 96 98
UPPER GREEN RIVER
BIG SANDY OPENING 9100 7.2 11.6 62 12.6 16.4 77
BLIND BULL SUM 8650 22.6 26.6 85 18.9 25.8 73
EAST RIM DIVIDE 7930 6.8 11.4 60 11.3 14.3 79
ELKHART PARK G.S. 9400 -M 11.3 * -M 16.6 *
GROS VENTRE SUMMIT 8775 9.1 11.8 77 13.0 15.8 82
KENDALL R.S. 7740 .1 7.3 1 14.2 17.0 84
LOOMIS PARK 8240 7.6 12.3 62 17.8 20.4 87
NEW FORK LAKE 8340 3.3 6.4 52 -M 13.9 *
SNIDER BASIN 8250 4.7 10.5 45 14.2 18.9 75
SPRING CREEK DIVIDE 9000 24.4 26.9 91 25.5 30.8 83
TRIPLE PEAK 8500 15.7 20.9 75 29.2 29.2 100
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Basin wide percent of average 70 83
LOWER GREEN RIVER
HAMS FORK 7840 .1 3.9 3 12.0 15.1 79
HEWINTA 9500 3.8 7.2 53 14.3 18.3 78
HICKERSON PARK 9150 .0 4.2 0 9.6 10.7 90
HOLE-IN-ROCK 9150 .3 3.4 9 10.6 10.2 104
INDIAN CREEK 9425 21.3 26.3 81 21.6 30.1 72
KELLEY R.S. 8180 8.1 12.0 68 16.1 24.1 67
STEEL CREEK PARK 10100 16.8 18.4 91 16.6 20.8 80
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Basin wide percent of average 67 78
UPPER BEAR RIVER
BUG LAKE 7950 9.8 15.0 65 17.9 22.9 78
HAYDEN FORK 9400 4.2 10.6 40 21.5 25.8 83
KELLEY R.S. 8180 8.1 12.0 68 16.1 24.1 67
LILY LAKE 9050 2.5 9.0 28 17.8 21.7 82
MONTE CRISTO 8960 9.9 25.9 38 24.4 31.0 79
SALT RIVER SUMMIT 7600 2.8 8.2 34 15.4 22.1 70
TRIAL LAKE 9960 13.2 25.1 53 20.4 30.2 68
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Basin wide percent of average 48 75
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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.