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 FRIDAY: MARCH 27 , 2009
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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 14.5 18.0 81 17.8 21.1 84
COTTONWOOD CREEK 7670 25.2 23.5 107 28.6 26.8 107
GRAND TARGHEE 9260 39.6 -M * 31.5 -M *
GRANITE CREEK 6770 15.5 18.7 83 19.6 19.7 99
GRASSY LAKE 7265 30.3 35.1 86 32.5 35.4 92
GROS VENTRE SUMMIT 8750 11.3 14.0 81 14.4 12.6 114
GUNSIGHT PASS 9820 13.9 -M * 14.7 -M *
LEWIS LAKE DIVIDE 7850 27.9 34.9 80 30.0 36.2 83
PHILLIPS BENCH 8200 25.3 28.4 89 27.0 28.5 95
SALT RIVER SUMMIT 7760 13.7 14.2 96 14.9 18.3 81
SNAKE RIVER STATION 6920 16.0 19.1 84 20.6 21.9 94
SPRING CREEK DIVIDE 9000 25.3 26.1 97 24.6 25.9 95
THUMB DIVIDE 7980 17.9 18.8 95 18.8 18.5 102
TOGWOTEE PASS 9580 25.4 24.3 105 27.6 24.0 115
TWO OCEAN PLATEAU 9240 35.7 27.4 130 27.6 27.2 101
WILLOW CREEK 8380 32.3 29.8 108 36.9 31.5 117
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Basin wide percent of average 95 98
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 21.9 23.0 95 19.9 19.7 101
BLACK BEAR 8170 32.9 38.4 86 32.9 39.6 83
CANYON 7870 12.4 13.5 92 13.7 15.1 91
FISHER CREEK 9100 35.0 34.2 102 34.0 35.7 95
MADISON PLATEAU 7750 20.0 24.6 81 21.7 26.1 83
NORTHEAST ENTRANCE 7350 10.3 11.2 92 12.8 12.4 103
PARKER PEAK 9400 24.9 21.2 117 -M 15.9 *
SYLVAN LAKE 8420 18.8 22.1 85 21.1 20.5 103
THUMB DIVIDE 7980 17.9 18.8 95 18.8 18.5 102
TWO OCEAN PLATEAU 9240 35.7 27.4 130 27.6 27.2 101
WHISKEY CREEK 6800 14.4 16.8 86 18.2 20.5 89
WHITE MILL 8700 23.1 23.8 97 22.0 26.5 83
WOLVERINE 7650 11.1 11.5 97 10.9 12.6 87
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Basin wide percent of average 97 92
WIND RIVER
BURROUGHS CREEK 8750 14.6 14.4 101 15.3 15.9 96
COLD SPRINGS 9630 7.3 8.6 85 9.7 10.1 96
DEER PARK 9700 9.9 16.5 60 14.7 21.2 69
HOBBS PARK 10100 11.2 14.2 79 11.3 12.2 93
LITTLE WARM 9370 11.3 11.6 97 13.9 12.9 108
SOUTH PASS 9040 10.9 16.3 67 -M 17.8 *
ST. LAWRENCE ALT 8620 4.6 7.0 66 8.1 8.4 96
TOGWOTEE PASS 9580 25.4 24.3 105 27.6 24.0 115
TOWNSEND CREEK 8700 7.3 8.3 88 9.7 11.0 88
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Basin wide percent of average 85 95
BIGHORN BASIN
BALD MTN. 9380 17.3 19.0 91 14.4 16.8 86
BEAR TRAP MEADOW 8200 8.7 5.2 167 9.2 7.8 118
BLACKWATER 9780 23.4 23.9 98 21.1 20.0 106
BONE SPRINGS DIV 9350 17.0 15.6 109 13.5 14.0 96
EVENING STAR 9200 28.5 29.1 98 29.3 24.7 119
GRAVE SPRINGS 8550 8.9 8.9 100 9.8 9.3 105
KIRWIN 9550 11.5 10.9 106 12.6 10.8 117
MARQUETTE 8760 4.8 8.4 57 7.2 9.2 78
MIDDLE POWDER 7760 10.7 11.2 96 9.4 11.8 80
OWL CREEK 8975 4.7 5.3 89 4.8 5.5 87
POWDER RIVER PASS 9480 12.1 10.5 115 13.7 11.9 115
SHELL CREEK 9580 15.8 14.2 111 15.1 12.8 118
SYLVAN LAKE 8420 18.8 22.1 85 21.1 20.5 103
SYLVAN ROAD 7120 13.5 12.6 107 17.8 17.4 102
TIMBER CREEK 7950 3.7 5.4 69 7.5 6.9 109
YOUNTS PEAK 8350 17.2 16.8 102 15.1 15.8 96
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Basin wide percent of average 99 103
SHOSHONE RIVER
BLACKWATER 9780 23.4 23.9 98 21.1 20.0 106
EVENING STAR 9200 28.5 29.1 98 29.3 24.7 119
KIRWIN 9550 11.5 10.9 106 12.6 10.8 117
MARQUETTE 8760 4.8 8.4 57 7.2 9.2 78
SYLVAN LAKE 8420 18.8 22.1 85 21.1 20.5 103
SYLVAN ROAD 7120 13.5 12.6 107 17.8 17.4 102
YOUNTS PEAK 8350 17.2 16.8 102 15.1 15.8 96
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Basin wide percent of average 95 105
POWDER-TONGUE
BEAR TRAP MEADOW 8200 8.7 5.2 167 9.2 7.8 118
BIG GOOSE 7990 8.2 9.9 83 10.5 8.1 130
BONE SPRINGS DIV 9350 17.0 15.6 109 13.5 14.0 96
BURGESS JUNCTION 7880 11.0 11.1 99 11.3 11.6 97
CLOUD PEAK RESERVOIR 9860 16.1 12.7 127 15.1 12.2 124
DOME LAKE 8880 11.4 11.8 97 13.7 12.5 110
GRAVE SPRINGS 8550 8.9 8.9 100 9.8 9.3 105
HANSEN SAWMILL 8360 6.0 6.3 95 9.0 7.8 115
MIDDLE POWDER 7760 10.7 11.2 96 9.4 11.8 80
POWDER RIVER PASS 9480 12.1 10.5 115 13.7 11.9 115
SUCKER CREEK 8880 12.6 11.2 112 14.6 12.9 113
TIE CREEK 6870 4.0 5.8 69 11.5 9.4 122
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Basin wide percent of average 105 109
BELLE FOURCHE
BLIND PARK 6890 6.8 8.6 79 14.1 10.7 132
COLE CANYON 5910 6.9 6.7 103 11.6 6.4 181
NORTH RAPID CREEK 6130 9.2 8.0 115 12.8 8.4 152
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Basin wide percent of average 98 151
UPPER N. PLATTE RIVER
COLUMBINE 9160 25.6 24.7 104 25.4 24.5 104
DIVIDE PEAK 8880 22.2 19.3 115 23.7 20.1 118
ELK RIVER 8700 20.9 19.0 110 20.5 19.0 108
JOE WRIGHT 10120 22.8 20.6 111 26.8 23.9 112
NORTH FRENCH CREEK 10130 33.1 28.1 118 30.8 23.9 129
OLD BATTLE 10000 30.9 31.4 98 35.9 33.7 107
SAGE CREEK BASIN 7850 11.0 11.2 98 13.4 11.7 115
SOUTH BRUSH CREEK 8440 12.2 12.7 96 16.1 15.8 102
TOWER 10500 41.8 44.2 95 40.4 37.4 108
WEBBER SPRINGS 9250 23.9 25.9 92 27.2 25.9 105
WILLOW CREEK PASS 9540 11.7 11.5 102 11.6 12.4 94
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Basin wide percent of average 103 109
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 22.1 22.8 97 20.6 21.2 97
CASPER MTN. 7900 11.5 13.8 83 12.8 13.7 93
DEADMAN HILL 10220 15.4 15.7 98 15.9 16.2 98
DEER PARK 9700 9.9 16.5 60 14.7 21.2 69
LAPRELE CREEK 8375 9.5 10.7 89 10.7 12.1 88
RENO HILL 8400 13.1 13.5 97 14.0 14.2 99
ROACH 9700 14.1 16.5 85 16.3 18.0 91
SAND LAKE 10050 28.3 31.4 90 26.6 23.2 115
SOUTH PASS 9040 10.9 16.3 67 -M 17.8 *
WINDY PEAK 7900 8.5 7.8 109 9.3 10.1 92
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Basin wide percent of average 87 94
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 15.1 11.5 131 17.2 15.3 112
DIVIDE PEAK 8880 22.2 19.3 115 23.7 20.1 118
OLD BATTLE 10000 30.9 31.4 98 35.9 33.7 107
SANDSTONE RS 8150 16.7 15.0 111 19.3 18.3 105
WHISKEY PARK 8950 31.3 29.6 106 31.5 27.9 113
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Basin wide percent of average 109 111
UPPER GREEN RIVER
BIG SANDY OPENING 9080 11.5 14.2 81 11.3 13.1 86
BLIND BULL SUM 8650 24.4 27.6 88 18.6 21.8 85
EAST RIM DIVIDE 7930 8.8 12.9 68 11.2 11.8 95
ELKHART PARK G.S. 9400 11.8 13.2 89 12.9 13.0 99
GROS VENTRE SUMMIT 8750 11.3 14.0 81 14.4 12.6 114
GUNSIGHT PASS 9820 13.9 -M * 14.7 -M *
KENDALL R.S. 7740 10.6 14.6 73 12.8 14.3 90
LOOMIS PARK 8240 14.8 17.2 86 17.2 17.1 101
NEW FORK LAKE 8340 11.1 11.1 100 9.9 11.1 89
SNIDER BASIN 8060 13.3 14.4 92 13.7 15.8 87
SPRING CREEK DIVIDE 9000 25.3 26.1 97 24.6 25.9 95
TRIPLE PEAK 8500 23.4 24.6 95 24.8 24.3 102
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Basin wide percent of average 88 95
LOWER GREEN RIVER
HAMS FORK 7840 10.3 12.4 83 10.8 12.0 90
HEWINTA 9519 7.7 11.5 67 12.1 14.0 86
HICKERSON PARK 9145 3.0 7.2 42 6.8 7.6 89
HOLE-IN-ROCK 9150 4.3 6.9 62 7.0 7.1 99
INDIAN CREEK 9425 22.7 27.2 83 20.3 24.8 82
KELLEY R.S. 8180 14.9 16.7 89 16.3 19.9 82
STEEL CREEK PARK 10200 11.2 15.3 73 14.7 15.6 94
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Basin wide percent of average 76 87
UPPER BEAR RIVER
BUG LAKE 7950 17.6 20.5 86 16.7 18.8 89
HAYDEN FORK 9212 14.1 16.1 88 19.4 20.4 95
KELLEY R.S. 8180 14.9 16.7 89 16.3 19.9 82
LILY LAKE 9156 13.0 12.8 102 15.2 16.9 90
MONTE CRISTO 8960 25.1 29.4 85 24.7 24.9 99
SALT RIVER SUMMIT 7760 13.7 14.2 96 14.9 18.3 81
TRIAL LAKE 9992 22.0 24.6 89 20.7 24.3 85
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Basin wide percent of average 90 89
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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 1961-90.
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.