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 SATURDAY: APRIL 12 , 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 18.2 17.1 106 23.0 22.7 101
COTTONWOOD CREEK 7600 21.6 23.9 90 25.1 29.3 86
GRANITE CREEK 6770 13.1 17.3 76 17.4 20.9 83
GRASSY LAKE 7265 33.5 36.8 91 33.9 38.0 89
GROS VENTRE SUMMIT 8775 12.9 14.6 88 12.1 13.8 88
LEWIS LAKE DIVIDE 7860 -M 36.5 * -M 38.8 *
PHILLIPS BENCH 8200 -M 30.3 * -M 30.8 *
SALT RIVER SUMMIT 7600 11.2 14.4 78 14.7 20.0 74
SNAKE RIVER STATION 6920 13.4 17.9 75 21.8 23.6 92
SPRING CREEK DIVIDE 9000 26.6 28.2 94 24.3 28.0 87
THUMB DIVIDE 7980 15.5 18.8 82 17.0 20.2 84
TOGWOTEE PASS 9580 24.3 26.4 92 24.8 26.4 94
TWO OCEAN PLATEAU 9360 31.6 30.1 105 27.4 29.5 93
WILLOW CREEK 8450 29.1 31.6 92 34.7 34.5 101
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Basin wide percent of average 91 90
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 26.8 25.1 107 23.5 21.5 109
BLACK BEAR 8170 -M 40.7 * -M 42.7 *
CANYON 8090 13.3 13.9 96 15.0 16.4 91
FISHER CREEK 9100 37.4 36.7 102 35.0 38.7 90
MADISON PLATEAU 7750 20.3 26.0 78 20.3 28.3 72
NORTHEAST ENTRANCE 7350 10.0 10.8 93 13.6 13.5 101
PARKER PEAK 9400 25.7 23.1 111 21.0 17.5 120
SYLVAN LAKE 8420 -M 23.9 * -M 22.4 *
THUMB DIVIDE 7980 15.5 18.8 82 17.0 20.2 84
TWO OCEAN PLATEAU 9360 31.6 30.1 105 27.4 29.5 93
WHISKEY CREEK 6800 12.2 17.7 69 15.6 22.3 70
WHITE MILL 8700 27.6 25.7 107 24.1 28.7 84
WOLVERINE 7650 11.1 11.1 100 12.8 13.7 93
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Basin wide percent of average 97 90
WIND RIVER
BURROUGHS CREEK 8750 17.8 15.0 119 19.6 17.5 112
COLD SPRINGS 9630 7.4 7.5 99 10.9 11.9 92
DEER PARK 9700 15.0 17.1 88 18.5 23.9 77
HOBBS PARK 10100 14.4 16.4 88 14.1 14.4 98
LITTLE WARM 9370 9.4 12.4 76 11.5 14.7 78
SOUTH PASS 9040 14.2 17.5 81 15.2 20.1 76
ST. LAWRENCE ALT 8620 7.3 7.3 100 9.2 10.1 91
TOGWOTEE PASS 9580 24.3 26.4 92 24.8 26.4 94
TOWNSEND CREEK 8700 10.0 9.6 104 12.9 13.1 98
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Basin wide percent of average 93 90
BIGHORN BASIN
BALD MTN. 9380 19.1 21.5 89 18.0 18.9 95
BEAR TRAP MEADOW 8200 6.7 4.8 140 8.9 9.3 96
BLACKWATER 9780 26.4 26.4 100 23.0 22.2 104
BONE SPRINGS DIV 9350 16.8 17.4 97 17.1 16.0 107
EVENING STAR 9200 30.2 31.6 96 32.7 27.1 121
GRAVE SPRINGS 8550 6.9 10.4 66 8.5 10.9 78
KIRWIN 9550 12.4 12.1 102 13.7 12.4 110
MARQUETTE 8760 12.5 10.3 121 14.0 11.2 125
MIDDLE POWDER 7760 9.0 13.5 67 7.7 13.6 57
OWL CREEK 8975 5.8 5.3 109 6.6 6.7 99
POWDER RIVER PASS 9480 11.0 11.7 94 13.0 13.6 96
SHELL CREEK 9580 16.5 15.8 104 15.0 14.6 103
SYLVAN LAKE 8420 -M 23.9 * -M 22.4 *
SYLVAN ROAD 7120 -M 12.3 * 18.0 18.8 96
TIMBER CREEK 7950 6.3 5.7 111 7.7 8.5 91
YOUNTS PEAK 8350 16.8 17.9 94 16.9 17.2 98
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Basin wide percent of average 96 100
SHOSHONE RIVER
BLACKWATER 9780 26.4 26.4 100 23.0 22.2 104
EVENING STAR 9200 30.2 31.6 96 32.7 27.1 121
KIRWIN 9550 12.4 12.1 102 13.7 12.4 110
MARQUETTE 8760 12.5 10.3 121 14.0 11.2 125
SYLVAN LAKE 8420 -M 23.9 * -M 22.4 *
SYLVAN ROAD 7120 -M 12.3 * 18.0 18.8 96
YOUNTS PEAK 8350 16.8 17.9 94 16.9 17.2 98
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Basin wide percent of average 100 109
POWDER-TONGUE
BEAR TRAP MEADOW 8200 6.7 4.8 140 8.9 9.3 96
BIG GOOSE 7990 12.2 12.0 102 14.2 10.1 141
BONE SPRINGS DIV 9350 16.8 17.4 97 17.1 16.0 107
BURGESS JUNCTION 7880 12.7 12.9 98 13.4 13.4 100
CLOUD PEAK RESERVOIR 9860 16.5 14.9 111 14.9 14.4 103
DOME LAKE 8880 14.1 13.7 103 15.8 14.5 109
GRAVE SPRINGS 8550 6.9 10.4 66 8.5 10.9 78
HANSEN SAWMILL 8360 8.7 6.3 138 10.7 9.2 116
MIDDLE POWDER 7760 9.0 13.5 67 7.7 13.6 57
POWDER RIVER PASS 9480 11.0 11.7 94 13.0 13.6 96
SUCKER CREEK 8880 14.8 13.1 113 16.2 15.0 108
TIE CREEK 6870 6.8 5.5 124 13.6 11.2 121
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Basin wide percent of average 100 102
BELLE FOURCHE
BLIND PARK 6890 5.9 7.8 76 10.5 12.2 86
COLE CANYON 5910 2.5 -M * 7.1 -M *
NORTH RAPID CREEK 6130 4.2 8.7 48 8.5 9.6 89
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Basin wide percent of average 61 87
UPPER N. PLATTE RIVER
COLUMBINE 9400 22.9 24.8 92 25.4 26.7 95
DIVIDE PEAK 8800 22.2 20.7 107 21.7 22.1 98
ELK RIVER 8700 17.5 19.6 89 19.9 20.9 95
JOE WRIGHT 10120 25.5 23.2 110 29.6 26.8 110
NORTH FRENCH CREEK 10100 32.5 31.9 102 31.1 26.6 117
OLD BATTLE 10000 31.1 34.2 91 34.8 36.7 95
SAGE CREEK BASIN 7850 9.4 12.0 78 12.9 12.8 101
SOUTH BRUSH CREEK 8400 12.8 13.3 96 18.2 17.8 102
TOWER 10500 45.0 48.7 92 35.6 41.0 87
WEBBER SPRINGS 9200 21.7 26.2 83 26.2 28.4 92
WILLOW CREEK PASS 9540 16.3 13.3 123 14.7 13.9 106
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Basin wide percent of average 96 99
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 18.6 25.9 72 22.0 23.9 92
CASPER MTN. 7900 15.2 16.3 93 12.7 16.3 78
DEADMAN HILL 10220 15.2 17.9 85 18.7 18.5 101
DEER PARK 9700 15.0 17.1 88 18.5 23.9 77
LAPRELE CREEK 8320 8.1 10.4 78 11.3 14.0 81
RENO HILL 8400 13.0 15.6 83 14.7 16.9 87
ROACH 9700 17.8 18.1 98 20.3 20.1 101
SAND LAKE 10080 27.0 34.5 78 22.1 26.1 85
SOUTH PASS 9040 14.2 17.5 81 15.2 20.1 76
WINDY PEAK 7840 9.5 8.0 119 11.7 11.7 100
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Basin wide percent of average 85 87
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 7.4 9.2 80 15.9 16.9 94
DIVIDE PEAK 8800 22.2 20.7 107 21.7 22.1 98
OLD BATTLE 10000 31.1 34.2 91 34.8 36.7 95
SANDSTONE RS 8150 12.2 13.7 89 18.8 19.9 94
WHISKEY PARK 8950 28.3 30.6 92 28.2 30.6 92
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Basin wide percent of average 93 95
UPPER GREEN RIVER
BIG SANDY OPENING 9100 11.6 15.2 76 11.5 14.4 80
BLIND BULL SUM 8650 22.9 28.8 80 17.6 23.5 75
EAST RIM DIVIDE 7930 10.7 13.8 78 10.6 12.8 83
ELKHART PARK G.S. 9400 12.2 13.9 88 13.1 14.4 91
GROS VENTRE SUMMIT 8775 12.9 14.6 88 12.1 13.8 88
KENDALL R.S. 7740 11.1 13.8 80 13.6 15.4 88
LOOMIS PARK 8240 16.0 17.2 93 16.5 18.4 90
NEW FORK LAKE 8340 10.2 11.3 90 -M 12.1 *
SNIDER BASIN 8250 13.1 14.9 88 13.7 17.1 80
SPRING CREEK DIVIDE 9000 26.6 28.2 94 24.3 28.0 87
TRIPLE PEAK 8500 23.7 25.8 92 27.2 26.4 103
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Basin wide percent of average 87 87
LOWER GREEN RIVER
HAMS FORK 7840 9.5 10.4 91 11.1 13.2 84
HEWINTA 9500 8.8 12.3 72 12.7 15.8 80
HICKERSON PARK 9150 5.7 8.2 70 8.9 8.8 101
HOLE-IN-ROCK 9150 7.6 7.3 104 9.6 8.3 116
INDIAN CREEK 9425 23.8 29.3 81 20.4 27.1 75
KELLEY R.S. 8180 13.1 17.2 76 15.1 21.7 70
STEEL CREEK PARK 10100 14.0 17.0 82 14.0 17.7 79
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Basin wide percent of average 81 82
UPPER BEAR RIVER
BUG LAKE 7950 16.7 21.6 77 16.7 20.6 81
HAYDEN FORK 9400 11.8 16.5 72 18.7 22.6 83
KELLEY R.S. 8180 13.1 17.2 76 15.1 21.7 70
LILY LAKE 9050 10.9 14.3 76 15.3 18.9 81
MONTE CRISTO 8960 15.3 30.5 50 21.8 27.4 80
SALT RIVER SUMMIT 7600 11.2 14.4 78 14.7 20.0 74
TRIAL LAKE 9960 14.2 26.2 54 17.1 26.7 64
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Basin wide percent of average 66 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.