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: MARCH 19 , 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 19.0 17.5 109 20.1 20.4 99
COTTONWOOD CREEK 7600 21.6 22.1 98 22.6 25.8 88
GRANITE CREEK 6770 14.2 18.1 78 15.8 19.0 83
GRASSY LAKE 7265 29.0 33.6 86 29.2 34.1 86
GROS VENTRE SUMMIT 8775 11.1 13.3 83 10.3 12.1 85
LEWIS LAKE DIVIDE 7860 30.8 33.5 92 27.3 34.8 78
PHILLIPS BENCH 8200 22.3 27.1 82 19.8 27.4 72
SALT RIVER SUMMIT 7600 11.6 13.7 85 13.3 17.7 75
SNAKE RIVER STATION 6920 14.7 18.5 79 19.3 21.2 91
SPRING CREEK DIVIDE 9000 23.8 25.0 95 21.9 25.0 88
THUMB DIVIDE 7980 13.8 17.8 78 13.9 17.8 78
TOGWOTEE PASS 9580 21.8 23.3 94 22.0 23.1 95
TWO OCEAN PLATEAU 9360 28.0 26.3 106 23.3 26.1 89
WILLOW CREEK 8450 27.0 28.6 94 30.8 30.3 102
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Basin wide percent of average 91 86
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 23.9 22.3 107 20.9 19.0 110
BLACK BEAR 8170 29.5 37.2 79 27.5 37.7 73
CANYON 8090 12.6 13.0 97 13.2 14.5 91
FISHER CREEK 9100 32.9 33.0 100 30.1 34.2 88
MADISON PLATEAU 7750 16.9 23.7 71 17.1 25.0 68
NORTHEAST ENTRANCE 7350 10.3 10.8 95 11.9 12.0 99
PARKER PEAK 9400 22.0 20.4 108 18.1 15.3 118
SYLVAN LAKE 8420 18.8 21.1 89 20.9 19.8 106
THUMB DIVIDE 7980 13.8 17.8 78 13.9 17.8 78
TWO OCEAN PLATEAU 9360 28.0 26.3 106 23.3 26.1 89
WHISKEY CREEK 6800 10.8 16.3 66 13.2 19.6 67
WHITE MILL 8700 24.4 22.8 107 21.0 25.4 83
WOLVERINE 7650 12.2 11.4 107 11.1 12.2 91
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Basin wide percent of average 93 87
WIND RIVER
BURROUGHS CREEK 8750 16.1 13.8 117 17.2 15.3 112
COLD SPRINGS 9630 8.3 8.2 101 9.7 9.7 100
DEER PARK 9700 12.9 15.7 82 15.4 20.3 76
HOBBS PARK 10100 12.7 13.6 93 11.2 11.6 97
LITTLE WARM 9370 9.1 10.9 83 10.2 12.4 82
SOUTH PASS 9040 12.6 15.7 80 13.0 17.1 76
ST. LAWRENCE ALT 8620 6.9 6.8 101 7.8 8.1 96
TOGWOTEE PASS 9580 21.8 23.3 94 22.0 23.1 95
TOWNSEND CREEK 8700 9.0 7.9 114 10.5 10.5 100
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Basin wide percent of average 94 91
BIGHORN BASIN
BALD MTN. 9380 17.9 18.1 99 16.1 16.1 100
BEAR TRAP MEADOW 8200 -M 5.0 * 6.5 7.5 87
BLACKWATER 9780 22.9 23.0 100 19.8 19.2 103
BONE SPRINGS DIV 9350 15.3 14.9 103 14.0 13.4 104
EVENING STAR 9200 27.2 28.0 97 28.8 23.9 121
GRAVE SPRINGS 8550 5.0 8.5 59 5.6 8.9 63
KIRWIN 9550 10.5 10.4 101 11.0 10.4 106
MARQUETTE 8760 10.4 7.9 132 10.9 8.8 124
MIDDLE POWDER 7760 7.4 10.5 70 6.4 11.2 57
OWL CREEK 8975 6.2 4.9 127 5.6 5.3 106
POWDER RIVER PASS 9480 9.7 10.0 97 10.9 11.4 96
SHELL CREEK 9580 14.5 13.4 108 13.1 12.3 107
SYLVAN LAKE 8420 18.8 21.1 89 20.9 19.8 106
SYLVAN ROAD 7120 12.9 12.4 104 16.2 16.9 96
TIMBER CREEK 7950 5.4 5.1 106 6.6 6.6 100
YOUNTS PEAK 8350 15.7 16.1 98 15.4 15.2 101
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Basin wide percent of average 98 100
SHOSHONE RIVER
BLACKWATER 9780 22.9 23.0 100 19.8 19.2 103
EVENING STAR 9200 27.2 28.0 97 28.8 23.9 121
KIRWIN 9550 10.5 10.4 101 11.0 10.4 106
MARQUETTE 8760 10.4 7.9 132 10.9 8.8 124
SYLVAN LAKE 8420 18.8 21.1 89 20.9 19.8 106
SYLVAN ROAD 7120 12.9 12.4 104 16.2 16.9 96
YOUNTS PEAK 8350 15.7 16.1 98 15.4 15.2 101
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Basin wide percent of average 100 108
POWDER-TONGUE
BEAR TRAP MEADOW 8200 -M 5.0 * 6.5 7.5 87
BIG GOOSE 7990 -M 9.2 * -M 7.8 *
BONE SPRINGS DIV 9350 15.3 14.9 103 14.0 13.4 104
BURGESS JUNCTION 7880 11.0 10.4 106 11.3 11.1 102
CLOUD PEAK RESERVOIR 9860 14.1 11.9 118 11.6 11.6 100
DOME LAKE 8880 12.6 11.0 115 12.8 11.9 108
GRAVE SPRINGS 8550 5.0 8.5 59 5.6 8.9 63
HANSEN SAWMILL 8360 7.9 6.0 132 8.7 7.4 118
MIDDLE POWDER 7760 7.4 10.5 70 6.4 11.2 57
POWDER RIVER PASS 9480 9.7 10.0 97 10.9 11.4 96
SUCKER CREEK 8880 12.8 10.5 122 13.6 12.3 111
TIE CREEK 6870 -M 5.9 * 11.1 9.1 122
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Basin wide percent of average 102 97
BELLE FOURCHE
BLIND PARK 6890 8.2 8.4 98 9.8 10.3 95
COLE CANYON 5910 5.1 -M * 6.1 -M *
NORTH RAPID CREEK 6130 6.8 7.7 88 7.8 8.1 96
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Basin wide percent of average 93 96
UPPER N. PLATTE RIVER
COLUMBINE 9400 21.4 24.1 89 22.1 23.5 94
DIVIDE PEAK 8800 19.0 18.2 104 18.9 19.2 98
ELK RIVER 8700 16.2 18.1 90 17.1 18.2 94
JOE WRIGHT 10120 20.9 19.6 107 24.9 22.9 109
NORTH FRENCH CREEK 10100 26.5 26.4 100 24.7 22.9 108
OLD BATTLE 10000 -M 30.0 * -M 32.2 *
SAGE CREEK BASIN 7850 10.9 10.6 103 11.6 11.2 104
SOUTH BRUSH CREEK 8400 12.2 12.0 102 14.9 15.1 99
TOWER 10500 39.2 42.3 93 33.7 35.8 94
WEBBER SPRINGS 9200 20.4 24.8 82 22.8 24.8 92
WILLOW CREEK PASS 9540 14.2 11.0 129 13.0 11.9 109
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Basin wide percent of average 97 99
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 15.8 21.7 73 18.7 20.2 93
CASPER MTN. 7900 13.2 13.0 102 9.8 13.0 75
DEADMAN HILL 10220 11.6 14.9 78 15.1 15.4 98
DEER PARK 9700 12.9 15.7 82 15.4 20.3 76
LAPRELE CREEK 8320 7.3 10.2 72 9.0 11.5 78
RENO HILL 8400 11.3 12.5 90 11.4 13.5 84
ROACH 9700 15.7 15.7 100 -M 17.1 *
SAND LAKE 10080 -M 29.6 * -M 22.1 *
SOUTH PASS 9040 12.6 15.7 80 13.0 17.1 76
WINDY PEAK 7840 8.8 7.4 119 9.5 9.7 98
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Basin wide percent of average 86 84
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 11.8 11.2 105 14.1 14.4 98
DIVIDE PEAK 8800 19.0 18.2 104 18.9 19.2 98
OLD BATTLE 10000 -M 30.0 * -M 32.2 *
SANDSTONE RS 8150 12.0 14.3 84 16.8 17.5 96
WHISKEY PARK 8950 26.1 28.0 93 24.7 26.5 93
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Basin wide percent of average 96 96
UPPER GREEN RIVER
BIG SANDY OPENING 9100 9.9 13.6 73 10.0 12.6 79
BLIND BULL SUM 8650 20.6 26.3 78 15.6 21.1 74
EAST RIM DIVIDE 7930 9.5 12.4 77 9.4 11.4 82
ELKHART PARK G.S. 9400 12.1 12.6 96 11.6 12.4 94
GROS VENTRE SUMMIT 8775 11.1 13.3 83 10.3 12.1 85
KENDALL R.S. 7740 12.1 14.1 86 12.2 13.8 88
LOOMIS PARK 8240 16.6 16.5 101 14.7 16.4 90
NEW FORK LAKE 8340 9.9 10.7 93 -M 10.6 *
SNIDER BASIN 8250 12.7 13.9 91 12.4 15.2 82
SPRING CREEK DIVIDE 9000 23.8 25.0 95 21.9 25.0 88
TRIPLE PEAK 8500 23.2 23.6 98 24.2 23.3 104
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Basin wide percent of average 89 87
LOWER GREEN RIVER
HAMS FORK 7840 10.8 12.2 89 10.1 11.5 88
HEWINTA 9500 8.9 10.8 82 10.3 13.4 77
HICKERSON PARK 9150 6.2 6.8 91 7.2 7.2 100
HOLE-IN-ROCK 9150 7.3 6.6 111 7.9 6.8 116
INDIAN CREEK 9425 21.6 25.8 84 18.4 23.8 77
KELLEY R.S. 8180 12.8 16.0 80 13.5 19.2 70
STEEL CREEK PARK 10100 11.2 14.6 77 11.6 14.9 78
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Basin wide percent of average 85 82
UPPER BEAR RIVER
BUG LAKE 7950 14.4 19.6 73 14.3 18.1 79
HAYDEN FORK 9400 13.2 15.3 86 16.0 19.5 82
KELLEY R.S. 8180 12.8 16.0 80 13.5 19.2 70
LILY LAKE 9050 11.0 12.3 89 12.3 16.2 76
MONTE CRISTO 8960 14.9 28.2 53 19.0 23.8 80
SALT RIVER SUMMIT 7600 11.6 13.7 85 13.3 17.7 75
TRIAL LAKE 9960 12.6 23.5 54 14.2 23.2 61
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Basin wide percent of average 70 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.