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 1 , 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 9.4 12.3 76 23.8 24.4 98
COTTONWOOD CREEK 7600 15.1 19.8 76 26.4 31.9 83
GRANITE CREEK 6770 5.7 12.8 45 18.0 22.4 80
GRASSY LAKE 7265 29.3 33.4 88 36.9 40.9 90
GROS VENTRE SUMMIT 8775 10.8 13.3 81 12.8 15.3 84
LEWIS LAKE DIVIDE 7860 31.4 34.6 91 33.1 41.6 80
PHILLIPS BENCH 8200 22.2 29.4 76 26.0 33.1 79
SALT RIVER SUMMIT 7600 4.2 10.6 40 15.1 21.6 70
SNAKE RIVER STATION 6920 5.4 12.2 44 23.5 25.5 92
SPRING CREEK DIVIDE 9000 24.6 28.6 86 24.8 30.2 82
THUMB DIVIDE 7980 11.3 14.9 76 19.3 22.0 88
TOGWOTEE PASS 9580 24.4 27.9 87 25.9 29.0 89
TWO OCEAN PLATEAU 9360 35.8 31.8 113 29.2 32.1 91
WILLOW CREEK 8450 23.3 30.6 76 37.0 37.7 98
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Basin wide percent of average 81 86
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 29.2 25.9 113 25.6 23.5 109
BLACK BEAR 8170 37.7 39.9 94 35.9 45.8 78
CANYON 8090 12.3 11.3 109 17.3 17.7 98
FISHER CREEK 9100 39.1 37.8 103 37.7 41.9 90
MADISON PLATEAU 7750 20.7 24.2 86 24.7 30.4 81
NORTHEAST ENTRANCE 7350 4.4 7.1 62 15.2 14.8 103
PARKER PEAK 9400 27.9 24.5 114 23.0 19.5 118
SYLVAN LAKE 8420 -M 23.8 * -M 24.7 *
THUMB DIVIDE 7980 11.3 14.9 76 19.3 22.0 88
TWO OCEAN PLATEAU 9360 35.8 31.8 113 29.2 32.1 91
WHISKEY CREEK 6800 11.1 15.2 73 19.3 24.2 80
WHITE MILL 8700 29.1 26.4 110 26.1 31.2 84
WOLVERINE 7650 4.7 7.2 65 13.8 15.2 91
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Basin wide percent of average 99 90
WIND RIVER
BURROUGHS CREEK 8750 16.9 13.6 124 20.7 19.3 107
COLD SPRINGS 9630 1.5 4.8 31 11.5 13.9 83
DEER PARK 9700 14.0 18.6 75 20.0 27.0 74
HOBBS PARK 10100 13.4 18.0 74 15.2 16.9 90
LITTLE WARM 9370 6.4 11.1 58 12.9 16.8 77
SOUTH PASS 9040 10.4 18.0 58 16.0 22.7 70
ST. LAWRENCE ALT 8620 1.2 6.1 20 9.9 12.1 82
TOGWOTEE PASS 9580 24.4 27.9 87 25.9 29.0 89
TOWNSEND CREEK 8700 5.3 9.1 58 13.6 15.5 88
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Basin wide percent of average 74 84
BIGHORN BASIN
BALD MTN. 9380 18.9 23.6 80 18.9 21.3 89
BEAR TRAP MEADOW 8200 -M 2.5 * -M 10.9 *
BLACKWATER 9780 28.7 28.8 100 25.0 24.7 101
BONE SPRINGS DIV 9350 17.6 18.3 96 19.0 18.3 104
EVENING STAR 9200 31.7 33.3 95 35.4 29.9 118
GRAVE SPRINGS 8550 -M 11.1 * 9.8 13.1 75
KIRWIN 9550 13.9 13.0 107 15.1 14.2 106
MARQUETTE 8760 13.7 11.3 121 16.6 13.7 121
MIDDLE POWDER 7760 7.6 14.3 53 9.6 15.8 61
OWL CREEK 8975 .7 4.0 18 7.5 8.2 91
POWDER RIVER PASS 9480 8.7 10.7 81 15.0 15.8 95
SHELL CREEK 9580 15.9 16.8 95 16.3 16.8 97
SYLVAN LAKE 8420 -M 23.8 * -M 24.7 *
SYLVAN ROAD 7120 9.1 8.1 112 19.6 20.5 96
TIMBER CREEK 7950 4.0 4.8 83 9.7 10.5 92
YOUNTS PEAK 8350 16.4 18.1 91 17.8 18.8 95
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Basin wide percent of average 91 97
SHOSHONE RIVER
BLACKWATER 9780 28.7 28.8 100 25.0 24.7 101
EVENING STAR 9200 31.7 33.3 95 35.4 29.9 118
KIRWIN 9550 13.9 13.0 107 15.1 14.2 106
MARQUETTE 8760 13.7 11.3 121 16.6 13.7 121
SYLVAN LAKE 8420 -M 23.8 * -M 24.7 *
SYLVAN ROAD 7120 9.1 8.1 112 19.6 20.5 96
YOUNTS PEAK 8350 16.4 18.1 91 17.8 18.8 95
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Basin wide percent of average 101 106
POWDER-TONGUE
BEAR TRAP MEADOW 8200 -M 2.5 * -M 10.9 *
BIG GOOSE 7990 10.8 11.6 93 16.3 12.9 126
BONE SPRINGS DIV 9350 17.6 18.3 96 19.0 18.3 104
BURGESS JUNCTION 7880 13.1 13.3 98 16.6 15.4 108
CLOUD PEAK RESERVOIR 9860 16.1 16.2 99 17.2 17.1 101
DOME LAKE 8880 11.6 13.5 86 18.2 16.8 108
GRAVE SPRINGS 8550 -M 11.1 * 9.8 13.1 75
HANSEN SAWMILL 8360 2.1 4.9 43 12.5 11.0 114
MIDDLE POWDER 7760 7.6 14.3 53 9.6 15.8 61
POWDER RIVER PASS 9480 8.7 10.7 81 15.0 15.8 95
SUCKER CREEK 8880 14.1 13.1 108 19.4 17.4 111
TIE CREEK 6870 3.3 3.9 85 16.6 13.5 123
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Basin wide percent of average 88 102
BELLE FOURCHE
BLIND PARK 6890 .5 4.0 12 12.7 14.2 89
COLE CANYON 5910 1.6 -M * 9.6 -M *
NORTH RAPID CREEK 6130 .7 3.8 18 11.1 11.4 97
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Basin wide percent of average 15 93
UPPER N. PLATTE RIVER
COLUMBINE 9400 18.3 20.9 88 28.6 29.2 98
DIVIDE PEAK 8800 19.4 19.3 101 25.2 24.3 104
ELK RIVER 8700 12.9 15.0 86 23.2 23.0 101
JOE WRIGHT 10120 30.1 25.1 120 35.2 30.1 117
NORTH FRENCH CREEK 10100 35.4 34.5 103 35.0 29.7 118
OLD BATTLE 10000 34.5 36.9 93 38.4 39.9 96
SAGE CREEK BASIN 7850 .1 11.2 1 14.7 14.1 104
SOUTH BRUSH CREEK 8400 11.2 11.1 101 22.0 20.1 109
TOWER 10500 50.1 52.2 96 50.0 45.1 111
WEBBER SPRINGS 9200 17.8 25.1 71 28.8 31.1 93
WILLOW CREEK PASS 9540 21.1 14.2 149 19.2 15.7 122
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Basin wide percent of average 95 106
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 18.9 28.2 67 24.6 27.0 91
CASPER MTN. 7900 11.4 17.1 67 14.5 19.5 74
DEADMAN HILL 10220 19.4 19.7 98 23.3 21.0 111
DEER PARK 9700 14.0 18.6 75 20.0 27.0 74
LAPRELE CREEK 8320 6.5 7.1 92 15.3 16.5 93
RENO HILL 8400 14.0 14.7 95 18.6 20.2 92
ROACH 9700 18.3 18.5 99 23.3 22.4 104
SAND LAKE 10080 31.3 37.0 85 27.5 29.3 94
SOUTH PASS 9040 10.4 18.0 58 16.0 22.7 70
WINDY PEAK 7840 8.5 4.9 173 15.7 13.5 116
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Basin wide percent of average 83 91
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .1 4.6 2 18.6 18.6 100
DIVIDE PEAK 8800 19.4 19.3 101 25.2 24.3 104
OLD BATTLE 10000 34.5 36.9 93 38.4 39.9 96
SANDSTONE RS 8150 6.4 9.5 67 22.3 21.9 102
WHISKEY PARK 8950 28.9 30.5 95 31.9 33.8 94
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Basin wide percent of average 89 98
UPPER GREEN RIVER
BIG SANDY OPENING 9100 9.2 13.5 68 12.6 15.9 79
BLIND BULL SUM 8650 22.5 27.9 81 18.4 25.2 73
EAST RIM DIVIDE 7930 7.7 13.1 59 11.2 13.9 81
ELKHART PARK G.S. 9400 10.7 12.8 84 13.6 16.0 85
GROS VENTRE SUMMIT 8775 10.8 13.3 81 12.8 15.3 84
KENDALL R.S. 7740 4.0 10.0 40 14.1 16.6 85
LOOMIS PARK 8240 9.5 14.3 66 17.5 19.9 88
NEW FORK LAKE 8340 5.4 8.4 64 -M 13.4 *
SNIDER BASIN 8250 6.9 12.6 55 14.0 18.5 76
SPRING CREEK DIVIDE 9000 24.6 28.6 86 24.8 30.2 82
TRIPLE PEAK 8500 16.4 23.7 69 28.0 28.6 98
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Basin wide percent of average 72 83
LOWER GREEN RIVER
HAMS FORK 7840 .8 6.0 13 11.7 14.7 80
HEWINTA 9500 3.9 9.3 42 13.8 17.8 78
HICKERSON PARK 9150 .0 5.7 0 9.6 10.2 94
HOLE-IN-ROCK 9150 2.0 4.7 43 10.3 9.7 106
INDIAN CREEK 9425 21.4 28.3 76 21.1 29.5 72
KELLEY R.S. 8180 8.9 14.1 63 15.1 23.6 64
STEEL CREEK PARK 10100 15.8 18.6 85 15.7 20.2 78
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Basin wide percent of average 61 77
UPPER BEAR RIVER
BUG LAKE 7950 10.7 18.0 59 17.3 22.4 77
HAYDEN FORK 9400 4.5 13.0 35 19.9 25.1 79
KELLEY R.S. 8180 8.9 14.1 63 15.1 23.6 64
LILY LAKE 9050 3.3 11.1 30 16.5 21.1 78
MONTE CRISTO 8960 9.2 28.3 33 23.1 30.3 76
SALT RIVER SUMMIT 7600 4.2 10.6 40 15.1 21.6 70
TRIAL LAKE 9960 12.4 26.5 47 19.2 29.4 65
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Basin wide percent of average 44 73
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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.